Scribd
Upload
2K views1,106 pages

PC78US-8 Part Book

The document appears to be sections from a parts catalog for a Komatsu PC78US-8 excavator. It includes exploded diagrams and part listings for the coupling and engine mounting components. The coupling section lists 17 individual parts by index code, part number, description, quantity and serial number range. The engine mounting section similarly lists 22 individual mounting parts. The document provides detailed part information and diagrams for replacement parts for these excavator systems.

Uploaded by

AlbertIR
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
2K views1,106 pages

PC78US-8 Part Book

The document appears to be sections from a parts catalog for a Komatsu PC78US-8 excavator. It includes exploded diagrams and part listings for the coupling and engine mounting components. The coupling section lists 17 individual parts by index code, part number, description, quantity and serial number range. The engine mounting section similarly lists 22 individual mounting parts. The document provides detailed part information and diagrams for replacement parts for these excavator systems.

Uploaded by

AlbertIR
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 1106

www.komatsupartsbook.

com
PC78US-8 S/N 15001-UP
-
Section Description Link Book
SAA4D95LE-5G S/N 504574-UP 0000193C
B0 ENGINE RELATED PARTS
C0 COOLING SYSTEM
D0 FUEL SYSTEM
E0 ELECTRICAL SYSTEM
H0 HYDRAULIC SYSTEM
J0 FRAME AND ITS RELATED PARTS
K0 OPERATOR'S COMPARTMENT AND CONTROL SYSTEM
M0 GUARDS AND COVERS
N0 SWING CIRCLE AND ITS RELATED PARTS
P0 TRAVEL SYSTEM AND ITS RELATED PARTS
R0 UNDERCARRIAGE
T0 WORK EQUIPMENT
U0 MARKS AND PLATES
V0 AUXILIARY PARTS AND TOOL
Y0 FIELD REPAIR SERVICE PARTS

Reference: Page:|0000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
ENGINE RELATED PARTS
Unit Name Unit No.
Coupling X22-1030021
Engine Mounting X22-1030031
Air Cleaner Mounting X22-1030041
Damper X22-1030061

Reference: Page:B000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Coupling
FIG. Name FIG. No.
Coupling A9999-501001

Reference:X22-1030021 Page:B001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000473

15 17
16 7
14 6
13

9
8

10

12

1
3 11
5 2
4

Reference:A9999-501001 Page:B001001

PC78US-8 S/N 15001-UP


Coupling (#15001-)
Index Code Part Number Description Qty Serial No.
1 708-3T-12190 Coupling 1 15001-
2 01010-81245 Bolt 6 15001-
3 01643-31232 Washer 6 15001-
4 01010-81035 Bolt 10 15001-
5 01643-31032 Washer 10 15001-
6 01010-81040 Bolt 1 15001-
7 01643-31032 Washer 1 15001-
8 01010-81045 Bolt 1 15001-
9 01643-31032 Washer 1 15001-
10 21W-01-41223 Tube 1 15001-
11 07260-20932 Hose 1 15001-
12 07285-00150 Clip 1 15001-
13 08028-48035 Cable, Ground 1 15001-
14 6205-81-9580 Spacer 1 15001-
15 01010-81030 Bolt 1 15001-
16 01643-31032 Washer 1 15001-
17 22P-01-11181 Bracket 1 15001-

Reference:A9999-501001 Page:B001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Engine Mounting
FIG. Name FIG. No.
Engine Mounting B0100-001001

Reference:X22-1030031 Page:B002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000458
31
27
33 28
34 26
25
23
32

27
29 28
30 25
23
24
27
22 28
21
20
18 9
10 21
19 8
21 20
20 7
18
18
19
11 3
19
19 2
12 18 1
19
19
18
16

21
17 13
15 20
14 18
19

5
6
4

19

18

Reference:B0100-001001 Page:B002001

PC78US-8 S/N 15001-UP


Engine Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-01-11260 Bracket 1 15001-
2 01643-31032 Washer 5 15001-
3 22B-01-21190 Bolt 5 15001-
4 22P-01-11270 Bracket 1 15001-
5 01643-31032 Washer 6 15001-
6 22B-01-21190 Bolt 6 15001-
7 21W-01-38190 Bracket 1 15001-
8 6144-81-6580 Spacer 4 15001-
9 01010-81285 Bolt 4 15001-
10 01643-31232 Washer 4 15001-
11 04020-01228 Pin, Dowel 2 15001-
12 21W-01-41180 Bracket 1 15001-
13 22P-01-11280 Spacer 4 15001-
14 01010-81285 Bolt 4 15001-
15 01643-31232 Washer 4 15001-
16 04020-01228 Pin, Dowel 2 15001-
17 201-01-71260 Stopper 1 15001-
18 203-01-67540 Washer 7 15001-
19 22B-01-21530 Cushion 8 15001-
20 01643-31645 Washer 4 15001-
21 01011-81630 Bolt 4 15001-
22 22P-01-11320 Cover 1 15001-
23 22P-01-11410 Cover 1 15001-
24 09817-A0753 Plate, Warning, High Temperature 1 15001-
25 142-62-14450 Plate 2 15001-
26 22P-01-11450 Plate 1 15001-
27 01010-80820 Bolt 5 15001-
28 01643-30823 Washer 5 15001-
29 01010-81225 Bolt 4 15001-
30 01643-31232 Washer 4 15001-
Reference:B0100-001001 Page:B002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Engine Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
31 22P-01-11360 Cover 1 15001-
32 22P-01-11351 Sheet 1 17192-
A2 22P-01-11350 Sheet 1 15001-17191
33 01010-80820 Bolt 4 15001-
34 01643-30823 Washer 4 15001-

Reference:B0100-001001 Page:B002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Air Cleaner Mounting
FIG. Name FIG. No.
Air Cleaner Mounting, Inner Parts, Air Cleaner B0200-001001
Air Cleaner Mounting, Mounting B0200-001002

Reference:X22-1030041 Page:B003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011238
4

2
3

Reference:B0200-001001 Page:B003001

PC78US-8 S/N 15001-UP


Air Cleaner Mounting, Inner Parts, Air Cleaner (#15001-)
Index Code Part Number Description Qty Serial No.
1 6271-81-7300 Air Cleaner 1 15001-
2 600-184-1180 Cover Assembly 1 15001-
3 600-184-1350 Valve, Vacuator 1 15001-
600-185-2200 Element Assembly 1 15001-
4 600-185-2210 Element, Outer 1 15001-
5 C1 Element, Inner 1 15001-
6 600-185-2230 O-ring 1 15001-

Reference:B0200-001001 Page:B003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA009666
9
11
12

8
10
4
6 5
3

1
2

Reference:B0200-001002 Page:B003002

PC78US-8 S/N 15001-UP


Air Cleaner Mounting, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 2 15001-
2 01643-30823 Washer 2 15001-
3 22P-54-11833 Bracket 1 15001-
4 01010-81025 Bolt 2 15001-
5 01643-31032 Washer 2 15001-
6 08670-12001 Indicator, Dust 1 15001-
7 22P-01-12111 Hose 1 15001-
8 07289-00095 Clamp 1 15001-
9 07289-00095 Clamp 1 15001-
10 22P-01-12120 Clip 1 15001-
11 01010-81225 Bolt 1 15001-
12 01643-31232 Washer 1 15001-

Reference:B0200-001002 Page:B003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Damper
FIG. Name FIG. No.
Damper B0600-001001

Reference:X22-1030061 Page:B004000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000462
10
8
11
9

13
7 6
14

3 6 15
5 12
4

2
1

Reference:B0600-001001 Page:B004001

PC78US-8 S/N 15001-UP


Damper (#15001-)
Index Code Part Number Description Qty Serial No.
1 07040-11209 Plug 1 15001-
2 07002-11223 O-ring 1 15001-
3 21W-01-21150 Nipple 1 15001-
4 07005-03016 Seal, Washer 1 15001-
5 22P-01-11131 Hose 1 15001-
6 07285-00200 Clip, Hose 2 15001-
7 21W-01-42190 Elbow 1 15001-
8 07030-00252 Breather 1 15001-
9 22P-01-11190 Bracket 1 15001-
10 01010-81020 Bolt 1 15001-
11 01643-31032 Washer 1 15001-
12 21W-01-41330 Sheet 1 15001-
13 01010-81030 Bolt 2 15001-
14 01643-31032 Washer 2 15001-
15 203-54-56960 Collar 2 15001-

Reference:B0600-001001 Page:B004001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
COOLING SYSTEM
Unit Name Unit No.
Cooling System, With Radiator Protective Net X22-1030072
Cooling System, With Radiator Protective Net X22-1030073
Cooling System, Without Radiator Protective Net X22-1032760
Cooling System, Without Radiator Protective Net X22-1032761
Cooling Fan Guard X22-1030081

Reference: Page:C000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cooling System, With Radiator Protective Net
FIG. Name FIG. No.
Cooling System, Radiator, Aftercooler and Oil Cooler C0100-001001
Cooling System, Fuel Cooler C0100-001002
Cooling System, Net C0100-001003
Cooling System, Piping C0100-001004
Cooling System, Sub-tank C0100-001005
Cooling System, Mounting C0100-001006

Reference:X22-1030072 Page:C001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000493
3 33
1

24
8 6 7 5
4
2

35
34 26
25
22 10
7
37 9

36
40

39
22
28
29

27

14
21
20 19
30 42
32
12
31 15 13
16
19
23 18

41 17
19

22 18
18
11
38
19

Reference:C0100-001001 Page:C001001

PC78US-8 S/N 15001-UP


Cooling System, Radiator, Aftercooler and Oil Cooler (#15001-15739)
Index Code Part Number Description Qty Serial No.
22P-03-11111 Radiator Assembly 1 15001-15739
1 C1 Radiator Assembly 1 15001-15739
2 22P-03-11841 Sheet 2 15001-15739
3 22P-03-11851 Sheet 2 15001-15739
4 01010-81025 Bolt 2 15001-15739
5 01643-31032 Washer 2 15001-15739
22P-03-11121 Aftercooler Assembly 1 15001-15739
6 C1 Aftercooler Assembly 1 15001-15739
7 22P-03-11861 Sheet 2 15001-15739
8 22P-03-11870 Sheet 2 15001-15739
9 01010-81025 Bolt 2 15001-15739
10 01643-31032 Washer 2 15001-15739
22P-03-11131 Oil Cooler Assembly 1 15001-15739
11 22P-03-11541 Oil Cooler Assembly 1 15001-15739
12 22P-03-11551 Oil Cooler Assembly 1 15001-15739
13 07000-13035 O-ring 2 15001-15739
14 22P-03-11181 Plate 1 15001-15739
15 01010-81080 Bolt 4 15001-15739
16 01643-31032 Washer 4 15001-15739
17 22P-03-11811 Sheet 2 15001-15739
18 22P-03-11830 Sheet 3 15001-15739
19 22P-03-11880 Sheet 4 15001-15739
20 01010-81025 Bolt 4 15001-15739
21 01643-31032 Washer 4 15001-15739
22 22B-03-12590 Cushion 5 15001-15739
23 22P-03-11141 Frame 1 15001-15739
24 22P-03-11151 Plate 1 15001-15739
25 01010-81025 Bolt 2 15001-15739
26 01643-31032 Washer 2 15001-15739
27 22P-03-11161 Shroud 1 15001-15739
Reference:C0100-001001 Page:C001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cooling System, Radiator, Aftercooler and Oil Cooler (#15001-15739)
Index Code Part Number Description Qty Serial No.
28 01010-80820 Bolt 7 15001-15739
29 01643-30823 Washer 7 15001-15739
30 22P-03-11170 Plate 1 15001-15739
31 01010-80820 Bolt 2 15001-15739
32 01643-30823 Washer 2 15001-15739
33 22B-03-11350 Cap 1 15001-15739
34 205-03-62660 Plug 1 15001-15739
35 07000-11007 O-ring 1 15001-15739
36 22P-03-11410 Hose 1 15001-15739
37 20Y-03-11330 Clip 1 15001-15739
38 01164-51030 Stud 2 15001-15739
39 22P-03-11751 Sheet 1 15001-15739
40 22P-03-11781 Sheet 1 15001-15739
41 22P-03-11821 Sheet 1 15001-15739
42 22P-03-11891 Sheet 1 15001-15739

Reference:C0100-001001 Page:C001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000496

8
7

9
6 8
5
7

3
9 2

Reference:C0100-001002 Page:C001002

PC78US-8 S/N 15001-UP


Cooling System, Fuel Cooler (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 208-03-71161 Fuel Cooler 1 15001-15739
2 01010-80820 Bolt 4 15001-15739
3 01643-30823 Washer 4 15001-15739
4 22P-03-11661 Bracket 1 15001-15739
5 01010-81025 Bolt 3 15001-15739
6 01643-31032 Washer 3 15001-15739
7 02782-10315 Elbow 2 15001-15739
8 07002-12034 O-ring 2 15001-15739
9 02896-11009 O-ring 2 15001-15739

Reference:C0100-001002 Page:C001002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000497

17
13
1
3
2
18
14
17

18 9
16 8
15
6
18 5

4 7
9
18 8
16 14
15

10
12
11

Reference:C0100-001003 Page:C001003

PC78US-8 S/N 15001-UP


Cooling System, Net (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 22P-03-11671 Net 1 15001-15739
2 01434-10620 Bolt, Wing 1 15001-15739
3 01643-30623 Washer 1 15001-15739
4 22P-03-11531 Net 1 15001-15739
5 01434-10620 Bolt, Wing 1 15001-15739
6 01643-30623 Washer 1 15001-15739
7 22P-03-11521 Net 1 15001-15739
8 01434-10620 Bolt, Wing 2 15001-15739
9 01643-30623 Washer 2 15001-15739
10 22P-03-11511 Bracket 1 15001-15739
11 01010-80820 Bolt 2 15001-15739
12 01643-30823 Washer 2 15001-15739
13 22P-03-11851 Sheet 2 15001-15739
14 22P-03-11870 Sheet 2 15001-15739
15 22P-03-11811 Sheet 2 15001-15739
16 22P-03-11741 Sheet 2 15001-15739
17 22P-03-11630 Sheet 4 15001-15739
18 22P-03-11640 Sheet 4 15001-15739

Reference:C0100-001003 Page:C001003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000498
20

1 2

3
7 18

6 19

7 5
4

5
15
9
10
11 16

17

12
14
13

Reference:C0100-001004 Page:C001004

PC78US-8 S/N 15001-UP


Cooling System, Piping (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 22P-03-11211 Hose 1 15001-15739
2 07289-00055 Clamp 1 15001-15739
3 07289-00045 Clamp 1 15001-15739
4 22P-03-11221 Hose 1 15001-15739
5 07289-00055 Clamp 2 15001-15739
6 22P-03-11311 Hose 1 15001-15739
7 07299-00055 Clamp 4 15001-15739
8 22P-03-11321 Tube 1 15001-15739
9 07000-E2065 O-ring 1 15001-15739
10 01010-81035 Bolt 2 15001-15739
11 01643-31032 Washer 2 15001-15739
12 22P-03-11350 Plate 1 15001-15739
13 01010-81025 Bolt 2 15001-15739
14 01643-31032 Washer 2 15001-15739
15 07283-34346 Clip 1 15001-15739
16 01597-01009 Nut 2 15001-15739
17 01643-31032 Washer 2 15001-15739
18 22P-03-11331 Hose 1 15001-15739
19 07299-00070 Clamp 2 15001-15739
20 07299-00055 Clamp 2 15001-15739

Reference:C0100-001004 Page:C001004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000499
13
15 16

17
14
11
20
12 19

21

9
9 8
10 9 10
2

9 9
1
9 18
9
3
4
5
6
7

Reference:C0100-001005 Page:C001005

PC78US-8 S/N 15001-UP


Cooling System, Sub-tank (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 201-03-71810 Tank 1 15001-15739
2 417-03-21350 Cap 1 15001-15739
3 22P-03-11420 Hose 1 15001-15739
4 362-03-14120 Bracket 1 15001-15739
5 01010-80616 Bolt 2 15001-15739
6 01643-30623 Washer 2 15001-15739
7 04434-51012 Clip 1 15001-15739
8 22P-03-11230 Hose Assembly 1 15001-15739
9 08211-11320 Clip 7 15001-15739
10 206-03-43340 Clip 2 15001-15739
22P-03-11951 Cover 1 15001-15739
11 C1 Cover 1 15001-15739
12 22P-03-11920 Seal 1 15001-15739
13 22P-03-11931 Seal 1 15001-15739
14 22P-03-11941 Seal 1 15001-15739
15 22P-03-11730 Sheet 1 15001-15739
16 22P-03-11761 Sheet 1 15001-15739
17 22P-03-11771 Sheet 1 15001-15739
18 08037-11825 Grommet 1 15001-15739
19 01010-80820 Bolt 3 15001-15739
20 01643-30823 Washer 3 15001-15739
21 (22P-03-11161) Shroud

Reference:C0100-001005 Page:C001005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000500

11
10

13

12

15
14

3 1
7
6
5

Reference:C0100-001006 Page:C001006

PC78US-8 S/N 15001-UP


Cooling System, Mounting (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 01010-81230 Bolt 2 15001-15739
2 01643-31232 Washer 2 15001-15739
3 21W-03-31510 Cushion 1 15001-15739
4 22P-03-11611 Bracket 1 15001-15739
5 01580-10806 Nut 1 15001-15739
6 01643-30823 Washer 1 15001-15739
7 175-61-23220 Washer 1 15001-15739
8 01010-81025 Bolt 2 15001-15739
9 01643-31032 Washer 2 15001-15739
10 01010-81230 Bolt 1 15001-15739
11 175-54-34170 Washer 1 15001-15739
12 22P-03-11790 Sheet 1 15001-15739
13 22P-03-11960 Sheet 1 15001-15739
14 22P-03-11970 Sheet 1 15001-15739
15 22P-03-11991 Sheet 1 15001-15739

Reference:C0100-001006 Page:C001006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cooling System, With Radiator Protective Net
FIG. Name FIG. No.
Cooling System, Radiator, Aftercooler and Oil Cooler C0100-005001
Cooling System, Fuel Cooler C0100-005002
Cooling System, Net C0100-005003
Cooling System, Piping C0100-005004
Cooling System, Sub-tank C0100-005005
Cooling System, Mounting C0100-005006

Reference:X22-1030073 Page:C002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000493
3 33
1

24
8 6 7 5
4
2

35
34 26
25
22 10
7
37 9

36
40

39
22
28
29

27

14
21
20 19
30 42
32
12
31 15 13
16
19
23 18

41 17
19

22 18
18
11
38
19

Reference:C0100-005001 Page:C002001

PC78US-8 S/N 15001-UP


Cooling System, Radiator, Aftercooler and Oil Cooler (#15740-)
Index Code Part Number Description Qty Serial No.
22P-03-11111 Radiator Assembly 1 15740-
1 C1 Radiator Assembly 1 15740-
2 22P-03-11841 Sheet 2 15740-
3 22P-03-11851 Sheet 2 15740-
4 01010-81025 Bolt 2 15740-
5 01643-31032 Washer 2 15740-
22P-03-11121 Aftercooler Assembly 1 15740-
6 C1 Aftercooler Assembly 1 15740-
7 22P-03-11861 Sheet 2 15740-
8 22P-03-11870 Sheet 2 15740-
9 01010-81025 Bolt 2 15740-
10 01643-31032 Washer 2 15740-
22P-03-11131 Oil Cooler Assembly 1 15740-
11 22P-03-11541 Oil Cooler Assembly 1 15740-
12 22P-03-11551 Oil Cooler Assembly 1 15740-
13 07000-13035 O-ring 2 15740-
14 22P-03-11181 Plate 1 15740-
15 01010-81080 Bolt 4 15740-
16 01643-31032 Washer 4 15740-
17 22P-03-11811 Sheet 2 15740-
18 22P-03-11830 Sheet 3 15740-
19 22P-03-11880 Sheet 4 15740-
20 01010-81025 Bolt 4 15740-
21 01643-31032 Washer 4 15740-
22 22B-03-12590 Cushion 5 15740-
23 22P-03-11141 Frame 1 15740-
24 22P-03-11151 Plate 1 15740-
25 01010-81025 Bolt 2 15740-
26 01643-31032 Washer 2 15740-
27 22P-03-11161 Shroud 1 15740-
Reference:C0100-005001 Page:C002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cooling System, Radiator, Aftercooler and Oil Cooler (#15740-)
Index Code Part Number Description Qty Serial No.
28 01010-80820 Bolt 7 15740-
29 01643-30823 Washer 7 15740-
30 22P-03-11170 Plate 1 15740-
31 01010-80820 Bolt 2 15740-
32 01643-30823 Washer 2 15740-
33 22B-03-11350 Cap 1 15740-
34 205-03-62660 Plug 1 15740-
35 07000-11007 O-ring 1 15740-
36 22P-03-11410 Hose 1 15740-
37 20Y-03-11330 Clip 1 15740-
38 01164-51030 Stud 2 15740-
39 22P-03-11751 Sheet 1 15740-
40 22P-03-11781 Sheet 1 15740-
41 22P-03-11821 Sheet 1 15740-
42 22P-03-11892 Sheet 1 15740-

Reference:C0100-005001 Page:C002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000496

8
7

9
6 8
5
7

3
9 2

Reference:C0100-005002 Page:C002002

PC78US-8 S/N 15001-UP


Cooling System, Fuel Cooler (#15740-)
Index Code Part Number Description Qty Serial No.
1 208-03-71161 Fuel Cooler 1 15740-
2 01010-80820 Bolt 4 15740-
3 01643-30823 Washer 4 15740-
4 22P-03-11661 Bracket 1 15740-
5 01010-81025 Bolt 3 15740-
6 01643-31032 Washer 3 15740-
7 02782-10315 Elbow 2 15740-
8 07002-12034 O-ring 2 15740-
9 02896-11009 O-ring 2 15740-

Reference:C0100-005002 Page:C002002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000497

17
13
1
3
2
18
14
17

18 9
16 8
15
6
18 5

4 7
9
18 8
16 14
15

10
12
11

Reference:C0100-005003 Page:C002003

PC78US-8 S/N 15001-UP


Cooling System, Net (#15740-)
Index Code Part Number Description Qty Serial No.
1 22P-03-11671 Net 1 15740-
2 01434-10620 Bolt, Wing 1 15740-
3 01643-30623 Washer 1 15740-
4 22P-03-11531 Net 1 15740-
5 01434-10620 Bolt, Wing 1 15740-
6 01643-30623 Washer 1 15740-
7 22P-03-11521 Net 1 15740-
8 01434-10620 Bolt, Wing 2 15740-
9 01643-30623 Washer 2 15740-
10 22P-03-11511 Bracket 1 15740-
11 01010-80820 Bolt 2 15740-
12 01643-30823 Washer 2 15740-
13 22P-03-11851 Sheet 2 15740-
14 22P-03-11870 Sheet 2 15740-
15 22P-03-11811 Sheet 2 15740-
16 22P-03-11741 Sheet 2 15740-
17 22P-03-11630 Sheet 4 15740-
18 22P-03-11640 Sheet 4 15740-

Reference:C0100-005003 Page:C002003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014808
22

1 2

3
9 20

7 21

8 6
4

10

5
17
11
12
13 18

19

14
16
15

Reference:C0100-005004 Page:C002004

PC78US-8 S/N 15001-UP


Cooling System, Piping (#15740-)
Index Code Part Number Description Qty Serial No.
1 22P-03-11211 Hose 1 15740-
2 07289-00055 Clamp 1 15740-
3 07289-00045 Clamp 1 15740-
4 22P-03-11221 Hose 1 15740-
5 07289-00055 Clamp 1 15740-
6 07289-00055 Clamp 1 15740-
7 22P-03-11311 Hose 1 15740-
8 07299-00055 Clamp 2 15740-
9 07299-00055 Clamp 2 15740-
10 22P-03-11321 Tube 1 15740-
11 07000-E2065 O-ring 1 15740-
12 01010-81035 Bolt 2 15740-
13 01643-31032 Washer 2 15740-
14 22P-03-11350 Plate 1 15740-
15 01010-81025 Bolt 2 15740-
16 01643-31032 Washer 2 15740-
17 07283-34346 Clip 1 15740-
18 01597-01009 Nut 2 15740-
19 01643-31032 Washer 2 15740-
20 22P-03-11331 Hose 1 15740-
21 07299-00070 Clamp 2 15740-
22 07299-00055 Clamp 2 15740-

Reference:C0100-005004 Page:C002004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014809
16
18 19

20
17
14
23
15 22

24

9
9 8
12 10 13
2

9 9
1
9 21
11
3
4
5
6
7

Reference:C0100-005005 Page:C002005

PC78US-8 S/N 15001-UP


Cooling System, Sub-tank (#15740-)
Index Code Part Number Description Qty Serial No.
1 201-03-71810 Tank 1 15740-
2 417-03-21350 Cap 1 15740-
3 22P-03-11420 Hose 1 15740-
4 362-03-14120 Bracket 1 15740-
5 01010-80616 Bolt 2 15740-
6 01643-30623 Washer 2 15740-
7 04434-51012 Clip 1 15740-
8 22P-03-11230 Hose Assembly 1 15740-
9 08211-11320 Clip 5 15740-
10 08211-11320 Clip 1 15740-
11 08211-11320 Clip 1 15740-
12 206-03-43340 Clip 1 15740-
13 206-03-43340 Clip 1 15740-
22P-03-11951 Cover 1 15740-
14 C1 Cover 1 15740-
15 22P-03-11920 Seal 1 15740-
16 22P-03-11931 Seal 1 15740-
17 22P-03-11941 Seal 1 15740-
18 22P-03-11730 Sheet 1 15740-
19 22P-03-11761 Sheet 1 15740-
20 22P-03-11771 Sheet 1 15740-
21 08037-11825 Grommet 1 15740-
22 01010-80820 Bolt 3 15740-
23 01643-30823 Washer 3 15740-
24 (22P-03-11161) Shroud

Reference:C0100-005005 Page:C002005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000500

11
10

13

12

15
14

3 1
7
6
5

Reference:C0100-005006 Page:C002006

PC78US-8 S/N 15001-UP


Cooling System, Mounting (#15740-)
Index Code Part Number Description Qty Serial No.
1 01010-81230 Bolt 2 15740-
2 01643-31232 Washer 2 15740-
3 21W-03-31510 Cushion 1 15740-
4 22P-03-11611 Bracket 1 15740-
5 01580-10806 Nut 1 15740-
6 01643-30823 Washer 1 15740-
7 175-61-23220 Washer 1 15740-
8 01010-81025 Bolt 2 15740-
9 01643-31032 Washer 2 15740-
10 01010-81230 Bolt 1 15740-
11 175-54-34170 Washer 1 15740-
12 22P-03-11790 Sheet 1 15740-
13 22P-03-11960 Sheet 1 15740-
14 22P-03-11970 Sheet 1 15740-
15 22P-03-11991 Sheet 1 15740-

Reference:C0100-005006 Page:C002006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cooling System, Without Radiator Protective Net
FIG. Name FIG. No.
Cooling System, Radiator, Aftercooler and Oil Cooler C0100-002001
Cooling System, Fuel Cooler C0100-002002
Cooling System, Piping C0100-002003
Cooling System, Sub-tank C0100-002004
Cooling System, Mounting C0100-002005

Reference:X22-1032760 Page:C003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000493
3 33
1

24
8 6 7 5
4
2

35
34 26
25
22 10
7
37 9

36
40

39
22
28
29

27

14
21
20 19
30 42
32
12
31 15 13
16
19
23 18

41 17
19

22 18
18
11
38
19

Reference:C0100-002001 Page:C003001

PC78US-8 S/N 15001-UP


Cooling System, Radiator, Aftercooler and Oil Cooler (#15001-15739)
Index Code Part Number Description Qty Serial No.
22P-03-11111 Radiator Assembly 1 15001-15739
1 C1 Radiator Assembly 1 15001-15739
2 22P-03-11841 Sheet 2 15001-15739
3 22P-03-11851 Sheet 2 15001-15739
4 01010-81025 Bolt 2 15001-15739
5 01643-31032 Washer 2 15001-15739
22P-03-11121 Aftercooler Assembly 1 15001-15739
6 C1 Aftercooler Assembly 1 15001-15739
7 22P-03-11861 Sheet 2 15001-15739
8 22P-03-11870 Sheet 2 15001-15739
9 01010-81025 Bolt 2 15001-15739
10 01643-31032 Washer 2 15001-15739
22P-03-11131 Oil Cooler Assembly 1 15001-15739
11 22P-03-11541 Oil Cooler Assembly 1 15001-15739
12 22P-03-11551 Oil Cooler Assembly 1 15001-15739
13 07000-13035 O-ring 2 15001-15739
14 22P-03-11181 Plate 1 15001-15739
15 01010-81080 Bolt 4 15001-15739
16 01643-31032 Washer 4 15001-15739
17 22P-03-11811 Sheet 2 15001-15739
18 22P-03-11830 Sheet 3 15001-15739
19 22P-03-11880 Sheet 4 15001-15739
20 01010-81025 Bolt 4 15001-15739
21 01643-31032 Washer 4 15001-15739
22 22B-03-12590 Cushion 5 15001-15739
23 22P-03-11141 Frame 1 15001-15739
24 22P-03-11151 Plate 1 15001-15739
25 01010-81025 Bolt 2 15001-15739
26 01643-31032 Washer 2 15001-15739
27 22P-03-11161 Shroud 1 15001-15739
Reference:C0100-002001 Page:C003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cooling System, Radiator, Aftercooler and Oil Cooler (#15001-15739)
Index Code Part Number Description Qty Serial No.
28 01010-80820 Bolt 7 15001-15739
29 01643-30823 Washer 7 15001-15739
30 22P-03-11170 Plate 1 15001-15739
31 01010-80820 Bolt 2 15001-15739
32 01643-30823 Washer 2 15001-15739
33 22B-03-11350 Cap 1 15001-15739
34 205-03-62660 Plug 1 15001-15739
35 07000-11007 O-ring 1 15001-15739
36 22P-03-11410 Hose 1 15001-15739
37 20Y-03-11330 Clip 1 15001-15739
38 01164-51030 Stud 2 15001-15739
39 22P-03-11751 Sheet 1 15001-15739
40 22P-03-11781 Sheet 1 15001-15739
41 22P-03-11821 Sheet 1 15001-15739
42 22P-03-11891 Sheet 1 15001-15739

Reference:C0100-002001 Page:C003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000496

8
7

9
6 8
5
7

3
9 2

Reference:C0100-002002 Page:C003002

PC78US-8 S/N 15001-UP


Cooling System, Fuel Cooler (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 208-03-71161 Fuel Cooler 1 15001-15739
2 01010-80820 Bolt 4 15001-15739
3 01643-30823 Washer 4 15001-15739
4 22P-03-11661 Bracket 1 15001-15739
5 01010-81025 Bolt 3 15001-15739
6 01643-31032 Washer 3 15001-15739
7 02782-10315 Elbow 2 15001-15739
8 07002-12034 O-ring 2 15001-15739
9 02896-11009 O-ring 2 15001-15739

Reference:C0100-002002 Page:C003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000498
20

1 2

3
7 18

6 19

7 5
4

5
15
9
10
11 16

17

12
14
13

Reference:C0100-002003 Page:C003003

PC78US-8 S/N 15001-UP


Cooling System, Piping (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 22P-03-11211 Hose 1 15001-15739
2 07289-00055 Clamp 1 15001-15739
3 07289-00045 Clamp 1 15001-15739
4 22P-03-11221 Hose 1 15001-15739
5 07289-00055 Clamp 2 15001-15739
6 22P-03-11311 Hose 1 15001-15739
7 07299-00055 Clamp 4 15001-15739
8 22P-03-11321 Tube 1 15001-15739
9 07000-E2065 O-ring 1 15001-15739
10 01010-81035 Bolt 2 15001-15739
11 01643-31032 Washer 2 15001-15739
12 22P-03-11350 Plate 1 15001-15739
13 01010-81025 Bolt 2 15001-15739
14 01643-31032 Washer 2 15001-15739
15 07283-34346 Clip 1 15001-15739
16 01597-01009 Nut 2 15001-15739
17 01643-31032 Washer 2 15001-15739
18 22P-03-11331 Hose 1 15001-15739
19 07299-00070 Clamp 2 15001-15739
20 07299-00055 Clamp 2 15001-15739

Reference:C0100-002003 Page:C003003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000499
13
15 16

17
14
11
20
12 19

21

9
9 8
10 9 10
2

9 9
1
9 18
9
3
4
5
6
7

Reference:C0100-002004 Page:C003004

PC78US-8 S/N 15001-UP


Cooling System, Sub-tank (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 201-03-71810 Tank 1 15001-15739
2 417-03-21350 Cap 1 15001-15739
3 22P-03-11420 Hose 1 15001-15739
4 362-03-14120 Bracket 1 15001-15739
5 01010-80616 Bolt 2 15001-15739
6 01643-30623 Washer 2 15001-15739
7 04434-51012 Clip 1 15001-15739
8 22P-03-11230 Hose Assembly 1 15001-15739
9 08211-11320 Clip 7 15001-15739
10 206-03-43340 Clip 2 15001-15739
22P-03-11951 Cover 1 15001-15739
11 C1 Cover 1 15001-15739
12 22P-03-11920 Seal 1 15001-15739
13 22P-03-11931 Seal 1 15001-15739
14 22P-03-11941 Seal 1 15001-15739
15 22P-03-11730 Sheet 1 15001-15739
16 22P-03-11761 Sheet 1 15001-15739
17 22P-03-11771 Sheet 1 15001-15739
18 08037-11825 Grommet 1 15001-15739
19 01010-80820 Bolt 3 15001-15739
20 01643-30823 Washer 3 15001-15739
21 (22P-03-11161) Shroud

Reference:C0100-002004 Page:C003004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000500

11
10

13

12

15
14

3 1
7
6
5

Reference:C0100-002005 Page:C003005

PC78US-8 S/N 15001-UP


Cooling System, Mounting (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 01010-81230 Bolt 2 15001-15739
2 01643-31232 Washer 2 15001-15739
3 21W-03-31510 Cushion 1 15001-15739
4 22P-03-11611 Bracket 1 15001-15739
5 01580-10806 Nut 1 15001-15739
6 01643-30823 Washer 1 15001-15739
7 175-61-23220 Washer 1 15001-15739
8 01010-81025 Bolt 2 15001-15739
9 01643-31032 Washer 2 15001-15739
10 01010-81230 Bolt 1 15001-15739
11 175-54-34170 Washer 1 15001-15739
12 22P-03-11790 Sheet 1 15001-15739
13 22P-03-11960 Sheet 1 15001-15739
14 22P-03-11970 Sheet 1 15001-15739
15 22P-03-11991 Sheet 1 15001-15739

Reference:C0100-002005 Page:C003005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cooling System, Without Radiator Protective Net
FIG. Name FIG. No.
Cooling System, Radiator, Aftercooler and Oil Cooler C0100-006001
Cooling System, Fuel Cooler C0100-006002
Cooling System, Piping C0100-006003
Cooling System, Sub-tank C0100-006004
Cooling System, Mounting C0100-006005

Reference:X22-1032761 Page:C004000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000493
3 33
1

24
8 6 7 5
4
2

35
34 26
25
22 10
7
37 9

36
40

39
22
28
29

27

14
21
20 19
30 42
32
12
31 15 13
16
19
23 18

41 17
19

22 18
18
11
38
19

Reference:C0100-006001 Page:C004001

PC78US-8 S/N 15001-UP


Cooling System, Radiator, Aftercooler and Oil Cooler (#15740-)
Index Code Part Number Description Qty Serial No.
22P-03-11111 Radiator Assembly 1 15740-
1 C1 Radiator Assembly 1 15740-
2 22P-03-11841 Sheet 2 15740-
3 22P-03-11851 Sheet 2 15740-
4 01010-81025 Bolt 2 15740-
5 01643-31032 Washer 2 15740-
22P-03-11121 Aftercooler Assembly 1 15740-
6 C1 Aftercooler Assembly 1 15740-
7 22P-03-11861 Sheet 2 15740-
8 22P-03-11870 Sheet 2 15740-
9 01010-81025 Bolt 2 15740-
10 01643-31032 Washer 2 15740-
22P-03-11131 Oil Cooler Assembly 1 15740-
11 22P-03-11541 Oil Cooler Assembly 1 15740-
12 22P-03-11551 Oil Cooler Assembly 1 15740-
13 07000-13035 O-ring 2 15740-
14 22P-03-11181 Plate 1 15740-
15 01010-81080 Bolt 4 15740-
16 01643-31032 Washer 4 15740-
17 22P-03-11811 Sheet 2 15740-
18 22P-03-11830 Sheet 3 15740-
19 22P-03-11880 Sheet 4 15740-
20 01010-81025 Bolt 4 15740-
21 01643-31032 Washer 4 15740-
22 22B-03-12590 Cushion 5 15740-
23 22P-03-11141 Frame 1 15740-
24 22P-03-11151 Plate 1 15740-
25 01010-81025 Bolt 2 15740-
26 01643-31032 Washer 2 15740-
27 22P-03-11161 Shroud 1 15740-
Reference:C0100-006001 Page:C004001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cooling System, Radiator, Aftercooler and Oil Cooler (#15740-)
Index Code Part Number Description Qty Serial No.
28 01010-80820 Bolt 7 15740-
29 01643-30823 Washer 7 15740-
30 22P-03-11170 Plate 1 15740-
31 01010-80820 Bolt 2 15740-
32 01643-30823 Washer 2 15740-
33 22B-03-11350 Cap 1 15740-
34 205-03-62660 Plug 1 15740-
35 07000-11007 O-ring 1 15740-
36 22P-03-11410 Hose 1 15740-
37 20Y-03-11330 Clip 1 15740-
38 01164-51030 Stud 2 15740-
39 22P-03-11751 Sheet 1 15740-
40 22P-03-11781 Sheet 1 15740-
41 22P-03-11821 Sheet 1 15740-
42 22P-03-11892 Sheet 1 15740-

Reference:C0100-006001 Page:C004001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000496

8
7

9
6 8
5
7

3
9 2

Reference:C0100-006002 Page:C004002

PC78US-8 S/N 15001-UP


Cooling System, Fuel Cooler (#15740-)
Index Code Part Number Description Qty Serial No.
1 208-03-71161 Fuel Cooler 1 15740-
2 01010-80820 Bolt 4 15740-
3 01643-30823 Washer 4 15740-
4 22P-03-11661 Bracket 1 15740-
5 01010-81025 Bolt 3 15740-
6 01643-31032 Washer 3 15740-
7 02782-10315 Elbow 2 15740-
8 07002-12034 O-ring 2 15740-
9 02896-11009 O-ring 2 15740-

Reference:C0100-006002 Page:C004002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014808
22

1 2

3
9 20

7 21

8 6
4

10

5
17
11
12
13 18

19

14
16
15

Reference:C0100-006003 Page:C004003

PC78US-8 S/N 15001-UP


Cooling System, Piping (#15740-)
Index Code Part Number Description Qty Serial No.
1 22P-03-11211 Hose 1 15740-
2 07289-00055 Clamp 1 15740-
3 07289-00045 Clamp 1 15740-
4 22P-03-11221 Hose 1 15740-
5 07289-00055 Clamp 1 15740-
6 07289-00055 Clamp 1 15740-
7 22P-03-11311 Hose 1 15740-
8 07299-00055 Clamp 2 15740-
9 07299-00055 Clamp 2 15740-
10 22P-03-11321 Tube 1 15740-
11 07000-E2065 O-ring 1 15740-
12 01010-81035 Bolt 2 15740-
13 01643-31032 Washer 2 15740-
14 22P-03-11350 Plate 1 15740-
15 01010-81025 Bolt 2 15740-
16 01643-31032 Washer 2 15740-
17 07283-34346 Clip 1 15740-
18 01597-01009 Nut 2 15740-
19 01643-31032 Washer 2 15740-
20 22P-03-11331 Hose 1 15740-
21 07299-00070 Clamp 2 15740-
22 07299-00055 Clamp 2 15740-

Reference:C0100-006003 Page:C004003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014809
16
18 19

20
17
14
23
15 22

24

9
9 8
12 10 13
2

9 9
1
9 21
11
3
4
5
6
7

Reference:C0100-006004 Page:C004004

PC78US-8 S/N 15001-UP


Cooling System, Sub-tank (#15740-)
Index Code Part Number Description Qty Serial No.
1 201-03-71810 Tank 1 15740-
2 417-03-21350 Cap 1 15740-
3 22P-03-11420 Hose 1 15740-
4 362-03-14120 Bracket 1 15740-
5 01010-80616 Bolt 2 15740-
6 01643-30623 Washer 2 15740-
7 04434-51012 Clip 1 15740-
8 22P-03-11230 Hose Assembly 1 15740-
9 08211-11320 Clip 5 15740-
10 08211-11320 Clip 1 15740-
11 08211-11320 Clip 1 15740-
12 206-03-43340 Clip 1 15740-
13 206-03-43340 Clip 1 15740-
22P-03-11951 Cover 1 15740-
14 C1 Cover 1 15740-
15 22P-03-11920 Seal 1 15740-
16 22P-03-11931 Seal 1 15740-
17 22P-03-11941 Seal 1 15740-
18 22P-03-11730 Sheet 1 15740-
19 22P-03-11761 Sheet 1 15740-
20 22P-03-11771 Sheet 1 15740-
21 08037-11825 Grommet 1 15740-
22 01010-80820 Bolt 3 15740-
23 01643-30823 Washer 3 15740-
24 (22P-03-11161) Shroud

Reference:C0100-006004 Page:C004004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000500

11
10

13

12

15
14

3 1
7
6
5

Reference:C0100-006005 Page:C004005

PC78US-8 S/N 15001-UP


Cooling System, Mounting (#15740-)
Index Code Part Number Description Qty Serial No.
1 01010-81230 Bolt 2 15740-
2 01643-31232 Washer 2 15740-
3 21W-03-31510 Cushion 1 15740-
4 22P-03-11611 Bracket 1 15740-
5 01580-10806 Nut 1 15740-
6 01643-30823 Washer 1 15740-
7 175-61-23220 Washer 1 15740-
8 01010-81025 Bolt 2 15740-
9 01643-31032 Washer 2 15740-
10 01010-81230 Bolt 1 15740-
11 175-54-34170 Washer 1 15740-
12 22P-03-11790 Sheet 1 15740-
13 22P-03-11960 Sheet 1 15740-
14 22P-03-11970 Sheet 1 15740-
15 22P-03-11991 Sheet 1 15740-

Reference:C0100-006005 Page:C004005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cooling Fan Guard
FIG. Name FIG. No.
Cooling Fan Guard C0310-001001

Reference:X22-1030081 Page:C005000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000502

1
3
2

3
2

Reference:C0310-001001 Page:C005001

PC78US-8 S/N 15001-UP


Cooling Fan Guard (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-03-11681 Guard 1 15001-
2 01010-81020 Bolt 2 15001-
3 01643-31032 Washer 2 15001-

Reference:C0310-001001 Page:C005001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
FUEL SYSTEM
Unit Name Unit No.
Fuel Tank X22-1030092
Fuel Supply Piping, Without Additional Fuel Filter X22-1038880
Fuel Supply Piping, With Water Separator and Additional Fuel Filter X22-1099590

Reference: Page:D000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Fuel Tank
FIG. Name FIG. No.
Fuel Tank D0100-001001

Reference:X22-1030092 Page:D001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000575
6

16 3
14
15

13
1 9
11
10

8 12
7

18

17

Reference:D0100-001001 Page:D001001

PC78US-8 S/N 15001-UP


Fuel Tank (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-04-11111 Tank 1 15001-
20Y-04-21550 Float Assembly 1 15001-
2 20Y-04-21560 Guide 1 15001-
3 20Y-04-21570 Float 1 15001-
4 20Y-04-21580 Cap 1 15001-
5 07056-18425 Strainer 1 15001-
6 22P-04-11670 Cap 1 15001-
7 07040-11007 Plug 1 15001-
8 07002-11023 O-ring 1 15001-
9 22P-04-11121 Gauge, Fuel Level 1 15001-
10 01010-80610 Bolt 4 15001-
11 01643-30623 Washer 4 15001-
12 02896-11009 O-ring 1 15001-
13 07000-13050 O-ring 1 15001-
14 02781-00313 Union 1 15001-
15 07002-11823 O-ring 1 15001-
16 02896-11009 O-ring 1 15001-
17 01010-81480 Bolt 4 15001-
18 01643-31445 Washer, Flat 4 15001-

Reference:D0100-001001 Page:D001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Fuel Supply Piping, Without Additional Fuel Filter
FIG. Name FIG. No.
Fuel Supply Piping, Drain Piping D0200-001001
Fuel Supply Piping, Suction Piping D0200-001002
Fuel Supply Piping, Return Piping D0200-001003
Fuel Supply Piping, Fuel Filter Mounting D0200-001004

Reference:X22-1038880 Page:D002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001563
9 15
14 16

12
8
13 7
11 5
6
4

10

Reference:D0200-001001 Page:D002001

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Drain Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-04-11171 Hose 1 15001-
2 08017-A1907 Conduit 1 15001-
3 11Y-09-11140 Clip 1 15001-
4 11Y-09-11140 Clip 1 15001-
5 07700-50240 Valve 1 15001-
6 154-04-11540 Nipple 1 15001-
7 20Y-04-31170 Nipple 1 15001-
8 07285-00115 Clip 1 15001-
9 07270-01015 Tube 1 15001-
10 08034-20536 Band 1 15001-
11 04434-52312 Clip 1 15001-
12 01010-81225 Bolt 1 15001-
13 01643-31232 Washer 1 15001-
14 04434-51312 Clip 1 15001-
15 01010-81225 Bolt 1 15001-
16 01643-31232 Washer 1 15001-

Reference:D0200-001001 Page:D002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001564

5
15 3
17
16
4

16
17 41
14
12 39
13 42 40
11 43
20 38
21
37
13 37
12 24 31
25
10 38
8 32
27 34
9 28 30
1 18 19 33
7
23
22
29
26 2
35
36

Reference:D0200-001002 Page:D002002

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Suction Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-04-11131 Hose, Red 1 15001-
2 22P-04-11141 Hose, Green 1 15001-
3 22P-04-11231 Joint 1 15001-
4 02896-11009 O-ring 1 15001-
5 07005-01412 Seal, Washer 2 15001-
6 07206-31014 Bolt, Joint 1 15001-
7 04434-51912 Clip 1 15001-
8 01010-81225 Bolt 1 15001-
9 01643-31232 Washer 1 15001-
10 195-06-41280 Bracket 1 15001-
11 04435-51912 Clip 1 15001-
12 01010-81225 Bolt 2 15001-
13 01643-31232 Washer 2 15001-
14 04434-51912 Clip 2 15001-
15 04435-51912 Clip 1 15001-
16 01010-81225 Bolt 2 15001-
17 01643-31232 Washer 2 15001-
18 14X-54-26640 Collar 1 15001-
19 04434-51912 Clip 2 15001-
20 01010-81275 Bolt 1 15001-
21 01643-31232 Washer 1 15001-
22 20Y-03-11220 Collar 1 15001-
23 04435-51912 Clip 1 15001-
24 01010-81260 Bolt 1 15001-
25 01643-31232 Washer 1 15001-
26 04435-51912 Clip 1 15001-
27 01010-81225 Bolt 1 15001-
28 01643-31232 Washer 1 15001-
29 195-33-11220 Spacer 1 15001-
30 04435-51912 Clip 1 15001-
Reference:D0200-001002 Page:D002002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Fuel Supply Piping, Suction Piping (#15001-)
Index Code Part Number Description Qty Serial No.
31 01010-81250 Bolt 1 15001-
32 01643-31232 Washer 1 15001-
33 04434-52712 Clip 1 15001-
34 07095-20419 Cushion 1 15001-
35 01010-81225 Bolt 1 15001-
36 01643-31232 Washer 1 15001-
37 04434-52712 Clip 2 15001-
38 07095-20419 Cushion 2 15001-
39 01010-81025 Bolt 1 15001-
40 01643-31032 Washer 1 15001-
41 04434-51910 Clip 1 15001-
42 01010-81020 Bolt 1 15001-
43 01643-31032 Washer 1 15001-

Reference:D0200-001002 Page:D002002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001352

21
20

30 23 18
24 9
31
19
33 10
1
34 9
22
14 10
22 8 3 1
25
15 5
2 32 29 27 6
8 4
28
17
16 2 7
26
12

11 13

Reference:D0200-001003 Page:D002003

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Return Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-04-11151 Hose, Orange 1 15001-
2 22P-04-11161 Hose, Yellow 1 15001-
3 22P-04-11181 Cushion 1 15001-
4 04435-51912 Clip 1 15001-
5 01010-81235 Bolt 1 15001-
6 01643-31232 Washer 1 15001-
7 198-43-15310 Collar 1 15001-
8 04435-51912 Clip 2 15001-
9 01010-81220 Bolt 2 15001-
10 01643-31232 Washer 2 15001-
11 22P-979-1211 Bracket 1 15001-
12 01010-81225 Bolt 2 15001-
13 01643-31232 Washer 2 15001-
14 04434-52712 Clip 1 15001-
15 07095-20419 Cushion 1 15001-
16 01010-81225 Bolt 1 15001-
17 01643-31232 Washer 1 15001-
18 22P-04-11231 Joint 1 15001-
19 02896-11009 O-ring 1 15001-
20 07005-01412 Seal, Washer 2 15001-
21 07206-31014 Bolt, Joint 1 15001-
22 04434-51912 Clip 2 15001-
23 01010-81275 Bolt 1 15001-
24 01643-31232 Washer 1 15001-
25 14X-54-26640 Collar 1 15001-
26 21W-04-51390 Bracket 1 15001-
27 01010-81225 Bolt 2 15001-
28 01643-31232 Washer 2 15001-
29 04434-51912 Clip 1 15001-
30 01010-81225 Bolt 1 15001-
Reference:D0200-001003 Page:D002003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Fuel Supply Piping, Return Piping (#15001-)
Index Code Part Number Description Qty Serial No.
31 01643-31232 Washer 1 15001-
32 04434-51912 Clip 1 15001-
33 01010-81220 Bolt 1 15001-
34 01643-31232 Washer 1 15001-

Reference:D0200-001003 Page:D002003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA009667
3
5 4
6
7
11
1 12
2

9
8
10
14

16
17
13

17
16

19
20

18
15

Reference:D0200-001004 Page:D002004

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Fuel Filter Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 07040-11409 Plug 1 15001-
2 07002-11423 O-ring 1 15001-
3 22B-04-21251 Elbow 1 15001-
4 07002-11423 O-ring 1 15001-
5 07700-40240 Valve 1 15001-
6 20U-62-42230 Connector 1 15001-
7 02896-11009 O-ring 1 15001-
8 02782-10311 Elbow 1 15001-
9 07002-11423 O-ring 1 15001-
10 02896-11009 O-ring 1 15001-
11 07372-21240 Bolt 2 15001-
12 01643-51232 Washer 2 15001-
13 07270-00880 Tube 1 15001-
14 07285-00100 Clip 1 15001-
15 22P-04-11221 Cover 1 15001-
16 01010-81225 Bolt 2 15001-
17 01643-31232 Washer 2 15001-
18 22P-03-11711 Bracket 1 15001-
19 01010-81020 Bolt 2 15001-
20 01643-31032 Washer 2 15001-

Reference:D0200-001004 Page:D002004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Fuel Supply Piping, With Water Separator and Additional Fuel Filter
FIG. Name FIG. No.
Fuel Supply Piping, Drain Piping D0200-003001
Fuel Supply Piping, Suction Piping (#15506-16832) D0200-003002
Fuel Supply Piping, Suction Piping (#16833-) D0200-003002A
Fuel Supply Piping, Return Piping D0200-003003
Fuel Supply Piping, Fuel Filter Mounting (#15506-16832) D0200-003004
Fuel Supply Piping, Fuel Filter Mounting (#16833-) D0200-003004A
Fuel Supply Piping, Water Separator (#15506-16144) D0200-003005
Fuel Supply Piping, Water Separator (#16145-) D0200-003005A
Fuel Supply Piping, Water Separator Mounting D0200-003006
Fuel Supply Piping, Additional Fuel Filter Mounting D0200-003007

Reference:X22-1099590 Page:D003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001563
9 15
14 16

12
8
13 7
11 5
6
4

10

Reference:D0200-003001 Page:D003001

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Drain Piping (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-04-11171 Hose 1 15506-
2 08017-A1907 Conduit 1 15506-
3 11Y-09-11140 Clip 1 15506-
4 11Y-09-11140 Clip 1 15506-
5 07700-50240 Valve 1 15506-
6 154-04-11540 Nipple 1 15506-
7 20Y-04-31170 Nipple 1 15506-
8 07285-00115 Clip 1 15506-
9 07270-01015 Tube 1 15506-
10 08034-20536 Band 1 15506-
11 04434-52312 Clip 1 15506-
12 01010-81225 Bolt 1 15506-
13 01643-31232 Washer 1 15506-
14 04434-51312 Clip 1 15506-
15 01010-81225 Bolt 1 15506-
16 01643-31232 Washer 1 15506-

Reference:D0200-003001 Page:D003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA003867
6
5
50 3
5
53
4

15 55 2
56
16
54 41 42
14 52
56 40
51
48 14
49
47 38
11 10 39
49
19
20 34 35 37
36
12 36
23
13 18 24 32 37

13
26 30
12 18
17 27
31

29 33
22
21 28
1
25
45
46
8
44 9
43 7

Reference:D0200-003002 Page:D003002

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Suction Piping (#15506-16832)
Index Code Part Number Description Qty Serial No.
1 21W-04-51531 Hose 1 15506-@
2 21W-04-51561 Hose 1 15506-16832
21U-62-34730 Band, Green 1 15506-16832
3 22P-04-11231 Joint 1 15506-@
4 02896-11009 O-ring 1 15506-@
5 07005-01412 Seal, Washer 2 15506-@
6 07206-31014 Bolt, Joint 1 15506-@
7 04434-51912 Clip 1 15506-@
8 01010-81225 Bolt 1 15506-@
9 01643-31232 Washer 1 15506-@
10 195-06-41280 Bracket 1 15506-@
11 04434-51912 Clip 1 15506-@
12 01010-81225 Bolt 2 15506-@
13 01643-31232 Washer 2 15506-@
14 04435-51912 Clip 2 15506-@
15 01010-81225 Bolt 2 15506-@
16 01643-31232 Washer 2 15506-@
17 14X-54-26640 Collar 1 15506-@
18 04434-51912 Clip 2 15506-@
19 01010-81275 Bolt 1 15506-@
20 01643-31232 Washer 1 15506-@
21 20Y-03-11220 Collar 1 15506-@
22 04435-51912 Clip 1 15506-@
23 01010-81260 Bolt 1 15506-@
24 01643-31232 Washer 1 15506-@
25 04435-51912 Clip 1 15506-@
26 01010-81225 Bolt 1 15506-@
27 01643-31232 Washer 1 15506-@
28 195-33-11220 Spacer 1 15506-@
29 04435-51912 Clip 1 15506-@
Reference:D0200-003002 Page:D003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Fuel Supply Piping, Suction Piping (#15506-16832)
Index Code Part Number Description Qty Serial No.
30 01010-81250 Bolt 1 15506-@
31 01643-31232 Washer 1 15506-@
32 04434-52712 Clip 1 15506-@
33 07095-20419 Cushion 1 15506-@
34 01010-81225 Bolt 1 15506-@
35 01643-31232 Washer 1 15506-@
36 04434-52712 Clip 2 15506-@
37 07095-20419 Cushion 2 15506-@
38 01010-81025 Bolt 1 15506-@
39 01643-31032 Washer 1 15506-@
40 04434-51910 Clip 1 15506-@
41 01010-81020 Bolt 1 15506-@
42 01643-31032 Washer 1 15506-@
43 363-43-37350 Bracket 1 15506-@
44 04434-51912 Clip 1 15506-@
45 01010-81020 Bolt 1 15506-@
46 01643-31032 Washer 1 15506-@
47 21W-04-51541 Hose 1 15506-16832
48 07206-31014 Bolt, Joint 1 15506-@
49 07005-01412 Seal, Washer 2 15506-16832
50 04434-51912 Clip 1 15506-16832
51 01010-81260 Bolt 1 15506-16832
52 01643-31232 Washer 1 15506-16832
53 205-03-71330 Collar 1 15506-16832
54 21W-04-51550 Hose 1 15506-16832
21U-62-34710 Band, Yellow 1 15506-16832
55 07206-31014 Bolt, Joint 1 15506-16832
56 07005-01412 Seal, Washer 2 15506-16832

Reference:D0200-003002 Page:D003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA007646
6
5
3
5
4
16 2
17 18 44 45
14 19 43

51 14
15 41
50
11 10 42
22
23 37 38 40
39
12 39
26
13 21 27 35 40

13 29 33
12 20 21 30
34

32 36
25
24 31
1
28
48
49
8
47 9
46 7

Reference:D0200-003002A Page:D003003

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Suction Piping (#16833-)
Index Code Part Number Description Qty Serial No.
1 21W-04-51531 Hose 1 15506-
2 22P-04-11141 Hose, Green 1 16833-
21U-62-34730 Band, Green 1 16833-
3 22P-04-11231 Joint 1 15506-
4 02896-11009 O-ring 1 15506-
5 07005-01412 Seal, Washer 2 15506-
6 07206-31014 Bolt, Joint 1 15506-
7 04434-51912 Clip 1 15506-
8 01010-81225 Bolt 1 15506-
9 01643-31232 Washer 1 15506-
10 195-06-41280 Bracket 1 15506-
11 04434-51912 Clip 1 15506-
12 01010-81225 Bolt 2 15506-
13 01643-31232 Washer 2 15506-
14 04435-51912 Clip 2 15506-
15 04435-51912 Clip 1 16833-
16 01010-81225 Bolt 2 15506-
17 01643-31232 Washer 2 15506-
18 01010-81225 Bolt 1 16833-
19 01643-31232 Washer 1 16833-
20 14X-54-26640 Collar 1 15506-
21 04434-51912 Clip 2 15506-
22 01010-81275 Bolt 1 15506-
23 01643-31232 Washer 1 15506-
24 20Y-03-11220 Collar 1 15506-
25 04435-51912 Clip 1 15506-
26 01010-81260 Bolt 1 15506-
27 01643-31232 Washer 1 15506-
28 04435-51912 Clip 1 15506-
29 01010-81225 Bolt 1 15506-
Reference:D0200-003002A Page:D003003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Fuel Supply Piping, Suction Piping (#16833-)
Index Code Part Number Description Qty Serial No.
30 01643-31232 Washer 1 15506-
31 195-33-11220 Spacer 1 15506-
32 04435-51912 Clip 1 15506-
33 01010-81250 Bolt 1 15506-
34 01643-31232 Washer 1 15506-
35 04434-52712 Clip 1 15506-
36 07095-20419 Cushion 1 15506-
37 01010-81225 Bolt 1 15506-
38 01643-31232 Washer 1 15506-
39 04434-52712 Clip 2 15506-
40 07095-20419 Cushion 2 15506-
41 01010-81025 Bolt 1 15506-
42 01643-31032 Washer 1 15506-
43 04434-51910 Clip 1 15506-
44 01010-81020 Bolt 1 15506-
45 01643-31032 Washer 1 15506-
46 363-43-37350 Bracket 1 15506-
47 04434-51912 Clip 1 15506-
48 01010-81020 Bolt 1 15506-
49 01643-31032 Washer 1 15506-
50 21W-04-51543 Hose 1 16833-
51 07206-31014 Bolt, Joint 1 15506-

Reference:D0200-003002A Page:D003003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001352

21
20

30 23 18
24 9
31
19
33 10
1
34 9
22
14 10
22 8 3 1
25
15 5
2 32 29 27 6
8 4
28
17
16 2 7
26
12

11 13

Reference:D0200-003003 Page:D003004

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Return Piping (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-04-11151 Hose, Orange 1 15506-
2 22P-04-11161 Hose, Yellow 1 15506-
3 22P-04-11181 Cushion 1 15506-
4 04435-51912 Clip 1 15506-
5 01010-81235 Bolt 1 15506-
6 01643-31232 Washer 1 15506-
7 198-43-15310 Collar 1 15506-
8 04435-51912 Clip 2 15506-
9 01010-81220 Bolt 2 15506-
10 01643-31232 Washer 2 15506-
11 22P-979-1211 Bracket 1 15506-
12 01010-81225 Bolt 2 15506-
13 01643-31232 Washer 2 15506-
14 04434-52712 Clip 1 15506-
15 07095-20419 Cushion 1 15506-
16 01010-81225 Bolt 1 15506-
17 01643-31232 Washer 1 15506-
18 22P-04-11231 Joint 1 15506-
19 02896-11009 O-ring 1 15506-
20 07005-01412 Seal, Washer 2 15506-
21 07206-31014 Bolt, Joint 1 15506-
22 04434-51912 Clip 2 15506-
23 01010-81275 Bolt 1 15506-
24 01643-31232 Washer 1 15506-
25 14X-54-26640 Collar 1 15506-
26 21W-04-51390 Bracket 1 15506-
27 01010-81225 Bolt 2 15506-
28 01643-31232 Washer 2 15506-
29 04434-51912 Clip 1 15506-
30 01010-81225 Bolt 1 15506-
Reference:D0200-003003 Page:D003004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Fuel Supply Piping, Return Piping (#15506-)
Index Code Part Number Description Qty Serial No.
31 01643-31232 Washer 1 15506-
32 04434-51912 Clip 1 15506-
33 01010-81220 Bolt 1 15506-
34 01643-31232 Washer 1 15506-

Reference:D0200-003003 Page:D003004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA009668
3

4
1 6
5 7
2

9
5

11
12
8
12
13 11

14

15

10

Reference:D0200-003004 Page:D003005

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Fuel Filter Mounting (#15506-16832)
Index Code Part Number Description Qty Serial No.
1 07040-11409 Plug 1 15506-@
2 07002-11423 O-ring 1 15506-@
3 02782-10311 Elbow 2 15506-@
4 07002-11423 O-ring 2 15506-@
5 02896-11009 O-ring 2 15506-@
6 07372-21240 Bolt 2 15506-@
7 01643-51232 Washer 2 15506-@
8 07270-00880 Tube 1 15506-@
9 07285-00100 Clip 1 15506-@
10 21W-04-51521 Cover 1 15506-16832
11 01010-81225 Bolt 2 15506-@
12 01643-31232 Washer 2 15506-@
13 22P-03-11711 Bracket 1 15506-@
14 01010-81020 Bolt 2 15506-@
15 01643-31032 Washer 2 15506-@

Reference:D0200-003004 Page:D003005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA009669
3

4
1 6
5 7
2

9
5

11
12
8
12

13 11

14

15

10

Reference:D0200-003004A Page:D003006

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Fuel Filter Mounting (#16833-)
Index Code Part Number Description Qty Serial No.
1 07040-11409 Plug 1 15506-
2 07002-11423 O-ring 1 15506-
3 02782-10311 Elbow 2 15506-
4 07002-11423 O-ring 2 15506-
5 02896-11009 O-ring 2 15506-
6 07372-21240 Bolt 2 15506-
7 01643-51232 Washer 2 15506-
8 07270-00880 Tube 1 15506-
9 07285-00100 Clip 1 15506-
10 22P-04-11221 Cover 1 16833-
11 01010-81225 Bolt 2 15506-
12 01643-31232 Washer 2 15506-
13 22P-03-11711 Bracket 1 15506-
14 01010-81020 Bolt 2 15506-
15 01643-31032 Washer 2 15506-

Reference:D0200-003004A Page:D003006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY013297

1
11

7
5

10

Reference:D0200-003005 Page:D003007

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Water Separator (#15506-16144)
Index Code Part Number Description Qty Serial No.
600-311-9732 Water Separator 1 15506-16144
1 600-311-9912 Cover 1 15506-16144
2 600-311-9921 Case 1 15506-16144
3 600-311-9931 Nut 1 15506-16144
4 600-311-9941 Baffle 1 15506-16144
5 600-311-9950 Ring 1 15506-16144
6 600-311-9590 Plug 1 15506-16144
7 600-311-9961 Gasket 1 15506-16144
8 07005-00812 Seal, Washer 1 15506-16144
9 6110-73-6231 Plug 1 15506-16144
10 600-311-9971 Screen 1 15506-16144
11 600-311-9490 O-ring 1 15506-16144

Reference:D0200-003005 Page:D003007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY025587

1
6

4
10

11

Reference:D0200-003005A Page:D003008

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Water Separator (#16145-)
Index Code Part Number Description Qty Serial No.
600-311-9733 Water Separator 1 16145-
1 600-311-9912 Cover 1 16145-
2 6110-73-6231 Plug 1 16145-
3 07005-00812 Seal, Washer 1 16145-
4 600-311-9961 Gasket 1 16145-
5 600-311-9971 Screen 1 16145-
6 600-311-9490 O-ring 1 16145-
7 600-311-9931 Nut 1 16145-
8 600-311-9941 Baffle 1 16145-
9 600-311-9921 Case 1 16145-
10 600-311-9950 Ring 1 16145-
11 600-311-9591 Plug 1 16145-

Reference:D0200-003005A Page:D003008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA003869
1
6
2
5
6
4
7
8

9
3

11

12

10

Reference:D0200-003006 Page:D003009

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Water Separator Mounting (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-81030 Bolt 2 15506-
2 01643-31032 Washer 2 15506-
3 07270-00825 Tube 1 15506-
4 205-04-62140 Joint 1 15506-
5 07206-31014 Bolt, Joint 1 15506-
6 07005-01412 Seal, Washer 2 15506-
7 07700-40240 Valve 1 15506-
8 20U-62-42230 Connector 1 15506-
9 02896-11009 O-ring 1 15506-
10 21W-04-51511 Bracket 1 15506-
11 01010-81025 Bolt 2 15506-
12 01643-31032 Washer 2 15506-

Reference:D0200-003006 Page:D003009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA003870
4

3
6
5

1
2

Reference:D0200-003007 Page:D003010

PC78US-8 S/N 15001-UP


Fuel Supply Piping, Additional Fuel Filter Mounting (#15506-16832)
Index Code Part Number Description Qty Serial No.
1 07372-21040 Bolt 2 15506-16832
2 01643-51032 Washer 2 15506-16832
3 22P-04-11231 Joint 1 15506-16832
4 07206-31014 Bolt, Joint 1 15506-16832
5 07005-01412 Seal, Washer 2 15506-16832
6 02896-11009 O-ring 1 15506-16832

Reference:D0200-003007 Page:D003010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
ELECTRICAL SYSTEM
Unit Name Unit No.
Battery X22-1035211
Battery X22-1092031
Battery, With Battery Disconnect Switch X22-1091830
Electric Wiring Harness, Without Rearview Camera X22-1034881
Front Working Lamp X22-1036890
Travel Alarm X22-1030151

Reference: Page:E000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Battery
FIG. Name FIG. No.
Battery E0100-001001

Reference:X22-1035211 Page:E001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002077

18 20
22
23

21

26
31
30 3 19
6

34
35
33 25
31
32 27 30 24 2
32 34 11
29 27
12
28 27 35 10
14
33 13
17
29
29 28 15
28 32
8
9
7
16

Reference:E0100-001001 Page:E001001

PC78US-8 S/N 15001-UP


Battery (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 08001-2080D Battery, Wet, 80D26L 2 15001-15739
08000-00000 Terminal, (+) 2 15001-15739
08000-00001 Terminal, (-) 2 15001-15739
2 22P-06-11121 Bracket 1 15001-15739
3 22P-06-11550 Bracket 1 15001-15739
4 22B-06-21450 Bolt 2 15001-15739
5 419-43-17920 Washer 2 15001-15739
6 22P-06-11131 Sheet 1 15001-15739
7 22P-06-11820 Plate 1 15001-15739
8 01010-81225 Bolt 2 15001-15739
9 01643-31232 Washer 2 15001-15739
10 08028-48030 Cable, Ground 1 15001-15739
11 01010-81045 Bolt 1 15001-15739
12 01643-31032 Washer 1 15001-15739
13 195-33-11220 Spacer 1 15001-15739
14 08038-22009 Cap 1 15001-15739
15 22P-06-11680 Cable 1 15001-15739
16 08038-42009 Cap 1 15001-15739
17 20U-06-21680 Cover, Terminal 1 15001-15739
18 08028-GH050 Cable, Ground 1 15001-15739
19 14X-06-12280 Cover 1 15001-15739
20 08038-04030 Cap 1 15001-15739
21 04434-51712 Clip 1 15001-15739
22 01010-81220 Bolt 1 15001-15739
23 01643-31232 Washer 1 15001-15739
24 21W-06-51141 Cable 1 15001-15739
25 08038-00035 Cap 1 15001-15739
26 08038-04030 Cap 1 15001-15739
27 04434-51712 Clip 3 15001-15739
28 01010-81220 Bolt 3 15001-15739
Reference:E0100-001001 Page:E001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Battery (#15001-15739)
Index Code Part Number Description Qty Serial No.
29 01643-31232 Washer 3 15001-15739
30 04434-52512 Clip 2 15001-15739
31 07095-20318 Cushion 2 15001-15739
32 22P-06-11540 Grommet 3 15001-15739
33 04434-51712 Clip 2 15001-15739
34 01010-81220 Bolt 2 15001-15739
35 01643-31232 Washer 2 15001-15739

Reference:E0100-001001 Page:E001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Battery
FIG. Name FIG. No.
Battery E0100-004001

Reference:X22-1092031 Page:E002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JD015853

18 20
22
23

21

26
32
30 3 19
6

36
37
35 25
33
34 27 31 24 2

36 11
29 12
28 27
27 37 10
14
34 35 13
17
29
29 28 15
28 34
8
9
7
16

Reference:E0100-004001 Page:E002001

PC78US-8 S/N 15001-UP


Battery (#15740-)
Index Code Part Number Description Qty Serial No.
1 08001-2080D Battery, Wet, 80D26L 2 15740-
08000-00000 Terminal, (+) 2 15740-
08000-00001 Terminal, (-) 2 15740-
2 22P-06-11122 Bracket 1 15740-
3 22P-06-11550 Bracket 1 15740-
4 22B-06-21450 Bolt 2 15740-
5 419-43-17920 Washer 2 15740-
6 22P-06-11131 Sheet 1 15740-
7 22P-06-11820 Plate 1 15740-
8 01010-81225 Bolt 2 15740-
9 01643-31232 Washer 2 15740-
10 08028-48030 Cable, Ground 1 15740-
11 01010-81045 Bolt 1 15740-
12 01643-31032 Washer 1 15740-
13 195-33-11220 Spacer 1 15740-
14 08038-22009 Cap 1 15740-
15 22P-06-11680 Cable 1 15740-
16 08038-42009 Cap 1 15740-
17 20U-06-21680 Cover, Terminal 1 15740-
18 08028-GH050 Cable, Ground 1 15740-
19 14X-06-12280 Cover 1 15740-
20 08038-04030 Cap 1 15740-
21 04434-51712 Clip 1 15740-
22 01010-81220 Bolt 1 15740-
23 01643-31232 Washer 1 15740-
24 21W-06-51141 Cable 1 15740-
25 08038-00035 Cap 1 15740-
26 08038-04030 Cap 1 15740-
27 04434-51712 Clip 3 15740-
28 01010-81220 Bolt 3 15740-
Reference:E0100-004001 Page:E002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Battery (#15740-)
Index Code Part Number Description Qty Serial No.
29 01643-31232 Washer 3 15740-
30 04434-52512 Clip 1 15740-
31 04434-52512 Clip 1 15740-
32 07095-20318 Cushion 1 15740-
33 07095-20318 Cushion 1 15740-
34 22P-06-11540 Grommet 3 15740-
35 04434-51712 Clip 2 15740-
36 01010-81220 Bolt 2 15740-
37 01643-31232 Washer 2 15740-

Reference:E0100-004001 Page:E002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Battery, With Battery Disconnect Switch
FIG. Name FIG. No.
Battery, (#15001-15739) E0100-002001
Battery, (#15740-) E0100-002001A

Reference:X22-1091830 Page:E003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002078
4

17 19
21
22

20

25
30
29 3 18
6

33
34
32 24
30
31 26 29 23 2
31 16
33
28 26
27 26 34 14
32
8
28
28 27 9
27 31 15
35 7
36 1
41 1

42
40 37
11 10 43
12 39 38

13
43
44

46
45

Reference:E0100-002001 Page:E003001

PC78US-8 S/N 15001-UP


Battery, (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 08001-2080D Battery, Wet, 80D26L 2 15001-@
08000-00000 Terminal, (+) 2 15001-@
08000-00001 Terminal, (-) 2 15001-@
2 22P-06-11121 Bracket 1 15001-15739
3 22P-06-11550 Bracket 1 15001-@
4 22B-06-21450 Bolt 2 15001-@
5 419-43-17920 Washer 2 15001-@
6 22P-06-11131 Sheet 1 15001-@
7 22P-06-11820 Plate 1 15001-@
8 01010-81225 Bolt 2 15001-@
9 01643-31232 Washer 2 15001-@
10 08028-58030 Cable, Ground 1 15001-@
11 01010-81045 Bolt 1 15001-@
12 01643-31032 Washer 1 15001-@
13 195-33-11220 Spacer 1 15001-@
14 22P-06-11680 Cable 1 15001-@
15 08038-42009 Cap 1 15001-@
16 20U-06-21680 Cover, Terminal 1 15001-@
17 08028-GH050 Cable, Ground 1 15001-@
18 14X-06-12280 Cover 1 15001-@
19 08038-04030 Cap 1 15001-@
20 04434-51712 Clip 1 15001-@
21 01010-81220 Bolt 1 15001-@
22 01643-31232 Washer 1 15001-@
23 21W-06-51141 Cable 1 15001-@
24 08038-00035 Cap 1 15001-@
25 08038-04030 Cap 1 15001-@
26 04434-51712 Clip 3 15001-@
27 01010-81220 Bolt 3 15001-@
28 01643-31232 Washer 3 15001-@
Reference:E0100-002001 Page:E003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Battery, (#15001-15739)
Index Code Part Number Description Qty Serial No.
29 04434-52512 Clip 2 15001-@
30 07095-20318 Cushion 2 15001-@
31 22P-06-11540 Grommet 3 15001-@
32 04434-51712 Clip 2 15001-@
33 01010-81220 Bolt 2 15001-@
34 01643-31232 Washer 2 15001-@
35 08038-22009 Cap 1 15001-@
36 22P-06-12340 Cable 1 15001-@
37 04434-51712 Clip 1 15001-@
38 01010-81225 Bolt 1 15001-@
39 01643-31232 Washer 1 15001-@
40 22P-06-12330 Bracket 1 15001-@
41 01010-81025 Bolt 1 15001-@
42 01643-31032 Washer 1 15001-@
43 08038-00035 Cap 2 15001-@
44 08068-00001 Switch, Battery Disconnect 1 15001-@
45 01252-60825 Bolt, Hexagon Socket Head 2 15001-@
46 01643-30823 Washer 2 15001-@

Reference:E0100-002001 Page:E003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA004642
4

17 19
21
22

20

25
30
29 3 18
6

33
34
32 30 24
31 26 29 23 2
31 16
33
28 26
27 26 34 14
32
8
28
28 27 9
27 31 15
35 7
36 1
41 1

42
40 37
11 10 43
12 39 38

13
43
44

46
45

Reference:E0100-002001A Page:E003002

PC78US-8 S/N 15001-UP


Battery, (#15740-)
Index Code Part Number Description Qty Serial No.
1 08001-2080D Battery, Wet, 80D26L 2 15001-
08000-00000 Terminal, (+) 2 15001-
08000-00001 Terminal, (-) 2 15001-
2 22P-06-11122 Bracket 1 15740-
3 22P-06-11550 Bracket 1 15001-
4 22B-06-21450 Bolt 2 15001-
5 419-43-17920 Washer 2 15001-
6 22P-06-11131 Sheet 1 15001-
7 22P-06-11820 Plate 1 15001-
8 01010-81225 Bolt 2 15001-
9 01643-31232 Washer 2 15001-
10 08028-58030 Cable, Ground 1 15001-
11 01010-81045 Bolt 1 15001-
12 01643-31032 Washer 1 15001-
13 195-33-11220 Spacer 1 15001-
14 22P-06-11680 Cable 1 15001-
15 08038-42009 Cap 1 15001-
16 20U-06-21680 Cover, Terminal 1 15001-
17 08028-GH050 Cable, Ground 1 15001-
18 14X-06-12280 Cover 1 15001-
19 08038-04030 Cap 1 15001-
20 04434-51712 Clip 1 15001-
21 01010-81220 Bolt 1 15001-
22 01643-31232 Washer 1 15001-
23 21W-06-51141 Cable 1 15001-
24 08038-00035 Cap 1 15001-
25 08038-04030 Cap 1 15001-
26 04434-51712 Clip 3 15001-
27 01010-81220 Bolt 3 15001-
28 01643-31232 Washer 3 15001-
Reference:E0100-002001A Page:E003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Battery, (#15740-)
Index Code Part Number Description Qty Serial No.
29 04434-52512 Clip 2 15001-
30 07095-20318 Cushion 2 15001-
31 22P-06-11540 Grommet 3 15001-
32 04434-51712 Clip 2 15001-
33 01010-81220 Bolt 2 15001-
34 01643-31232 Washer 2 15001-
35 08038-22009 Cap 1 15001-
36 22P-06-12340 Cable 1 15001-
37 04434-51712 Clip 1 15001-
38 01010-81225 Bolt 1 15001-
39 01643-31232 Washer 1 15001-
40 22P-06-12330 Bracket 1 15001-
41 01010-81025 Bolt 1 15001-
42 01643-31032 Washer 1 15001-
43 08038-00035 Cap 2 15001-
44 08068-00001 Switch, Battery Disconnect 1 15001-
45 01252-60825 Bolt, Hexagon Socket Head 2 15001-
46 01643-30823 Washer 2 15001-

Reference:E0100-002001A Page:E003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Electric Wiring Harness, Without Rearview Camera
FIG. Name FIG. No.
Electric Wiring Harness, Wiring Harness Clamp, Engine E0200-001001
Electric Wiring Harness, Wiring Harness Clamp, Engine Controller (#15001-16019) E0200-001002
Electric Wiring Harness, Wiring Harness Clamp, Engine Controller (#16020-) E0200-001002A
Electric Wiring Harness, Alternator Wiring Harness E0200-001003
Electric Wiring Harness, Wiring Harness Clamp, Revolving Frame E0200-001004
Electric Wiring Harness, Wiring Harness Clamp, Control Valve E0200-001005
Electric Wiring Harness, Wiring Harness Clamp, Floor Frame E0200-001006
Electric Wiring Harness, Fuse Holder E0200-001007
Electric Wiring Harness, Wiring Harness Clamp, Battery Relay and Ground Cable (#15001-28942) E0200-001008
Electric Wiring Harness, Wiring Harness Clamp, Battery Relay and Ground Cable (#28943-) E0200-001008A
Electric Wiring Harness, Horn E0200-001009

Reference:X22-1034881 Page:E004000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000514
18
16 17

16 18
13 17
24
19
25
24 14
25 15

23 9 11
10 12

5
21
22
6
20 7
4

2
3

1
8

Reference:E0200-001001 Page:E004001

PC78US-8 S/N 15001-UP


Electric Wiring Harness, Wiring Harness Clamp, Engine (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-06-11221 Bracket 1 15001-
2 01010-81030 Bolt 2 15001-
3 01643-31032 Washer 2 15001-
4 04434-52712 Clip 1 15001-
5 07095-20420 Cushion 1 15001-
6 01010-81235 Bolt 1 15001-
7 01643-31232 Washer 1 15001-
8 198-43-15310 Collar 1 15001-
9 600-051-2140 Clip 1 15001-
10 195-33-11220 Spacer 1 15001-
11 01010-81045 Bolt 1 15001-
12 01643-31032 Washer 1 15001-
13 600-051-2140 Clip 1 15001-
14 01010-81020 Bolt 1 15001-
15 01643-31032 Washer 1 15001-
16 600-051-2080 Clip 2 15001-
17 01010-81016 Bolt 2 15001-
18 01643-31032 Washer 2 15001-
19 08038-12027 Cap 1 15001-
20 04434-52512 Clip 1 15001-
21 01010-81220 Bolt 1 15001-
22 01643-31232 Washer 1 15001-
23 600-051-2060 Clip 2 15001-
24 01010-81020 Bolt 2 15001-
25 01643-31032 Washer 2 15001-

Reference:E0200-001001 Page:E004001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000517
7
9
8

4
7
1
6
3 5
2

12
5
13 6
21
20 11
19

23 21 10
20 3
24
22 15 2
25 14

16
18
17

26

Reference:E0200-001002 Page:E004002

PC78US-8 S/N 15001-UP


Electric Wiring Harness, Wiring Harness Clamp, Engine Controller (#15001-16019)
Index Code Part Number Description Qty Serial No.
1 22P-06-11151 Bracket 1 15001-16019
2 01010-80850 Bolt 4 15001-@
3 01643-30823 Washer 4 15001-@
4 22P-06-11161 Bracket 1 15001-16019
5 01010-81020 Bolt 3 15001-@
6 01643-31032 Washer 3 15001-@
7 6251-81-7210 Cushion 8 15001-@
8 01010-80850 Bolt 4 15001-@
9 01643-30823 Washer 4 15001-@
10 22P-06-11171 Bracket 1 15001-16019
11 22P-06-11830 Bracket 1 15001-@
12 01010-81025 Bolt 1 15001-@
13 01643-31032 Washer 1 15001-@
14 08211-01320 Clip 1 15001-@
15 04434-53211 Clip 1 15001-@
16 07095-20523 Cushion 1 15001-@
17 01010-81025 Bolt 1 15001-@
18 01643-31032 Washer 1 15001-@
19 04435-51910 Clip 1 15001-@
20 01010-81016 Bolt 2 15001-@
21 01643-31032 Washer 2 15001-@
22 22P-06-11521 Sheet 1 15001-@
23 01010-81025 Bolt 2 15001-@
24 01643-31032 Washer 2 15001-@
25 203-54-55660 Collar 2 15001-16019
26 20T-54-74510 Cap 2 15001-@

Reference:E0200-001002 Page:E004002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA005524
7
9
8

4
7
1
6
3 5
2

12
5
13 6
21
20 11
19

25 23 10
22 3
26
24 15 2
27 14

16
18
17

28

Reference:E0200-001002A Page:E004003

PC78US-8 S/N 15001-UP


Electric Wiring Harness, Wiring Harness Clamp, Engine Controller (#16020-)
Index Code Part Number Description Qty Serial No.
1 22P-06-11152 Bracket 1 16020-
2 01010-80850 Bolt 4 15001-
3 01643-30823 Washer 4 15001-
4 22P-06-11162 Bracket 1 16020-
5 01010-81020 Bolt 3 15001-
6 01643-31032 Washer 3 15001-
7 6251-81-7210 Cushion 8 15001-
8 01010-80850 Bolt 4 15001-
9 01643-30823 Washer 4 15001-
10 22P-06-11172 Bracket 1 16020-
11 22P-06-11830 Bracket 1 15001-
12 01010-81025 Bolt 1 15001-
13 01643-31032 Washer 1 15001-
14 08211-01320 Clip 1 15001-
15 04434-53211 Clip 1 15001-
16 07095-20523 Cushion 1 15001-
17 01010-81025 Bolt 1 15001-
18 01643-31032 Washer 1 15001-
19 04435-51910 Clip 1 15001-
20 01010-81016 Bolt 1 15001-
21 01643-31032 Washer 1 15001-
22 01010-81016 Bolt 1 15001-
23 01643-31032 Washer 1 15001-
24 22P-06-11521 Sheet 1 15001-
25 01010-81025 Bolt 2 15001-
26 01643-31032 Washer 2 15001-
27 203-54-56960 Collar 2 16020-
28 20T-54-74510 Cap 2 15001-

Reference:E0200-001002A Page:E004003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000518

18

3 2
10
11
9 1

13
14 8
12 7
6
5

16
17
15

Reference:E0200-001003 Page:E004004

PC78US-8 S/N 15001-UP


Electric Wiring Harness, Alternator Wiring Harness (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-06-11191 Wiring Harness 1 15001-
2 175-61-17240 Collar 1 15001-
3 04434-52110 Clip 1 15001-
4 07095-20314 Cushion 1 15001-
5 01010-81080 Bolt 1 15001-
6 01643-31032 Washer 1 15001-
7 20Y-01-21260 Spacer 1 15001-
8 04434-52112 Clip 1 15001-
9 07095-20314 Cushion 1 15001-
10 01010-81245 Bolt 1 15001-
11 01643-31232 Washer 1 15001-
12 08193-20012 Clip 1 15001-
13 01010-81225 Bolt 1 15001-
14 01643-31232 Washer 1 15001-
15 08053-01512 Clip 1 15001-
16 01010-81225 Bolt 1 15001-
17 01643-31232 Washer 1 15001-
18 08038-00519 Cap 1 15001-

Reference:E0200-001003 Page:E004004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA003595

1
3
47 2
48
46 9
60 10
61
59 44 15
45 21 5
38 16 6
20 22 14
37
57
58 4
43 31
56 8
50 7
30 51
53
42 11
49
39 52 13
40 41 32 12
29 54
27 33 17 55
28 24 19
26 25 18

24
25
35
36
23 34

Reference:E0200-001004 Page:E004005

PC78US-8 S/N 15001-UP


Electric Wiring Harness, Wiring Harness Clamp, Revolving Frame (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-06-11281 Bracket 1 15001-
2 01010-81230 Bolt 2 15001-
3 01643-31232 Washer 2 15001-
4 04434-51712 Clip 1 15001-
5 01010-81220 Bolt 1 15001-
6 01643-31232 Washer 1 15001-
7 04434-52712 Clip 1 15001-
8 07095-20420 Cushion 1 15001-
9 01010-81220 Bolt 1 15001-
10 01643-31232 Washer 1 15001-
11 22P-06-11570 Bracket 1 15001-
12 01010-81225 Bolt 1 15001-
13 01643-31232 Washer 1 15001-
14 04434-52312 Clip 1 15001-
15 01010-81225 Bolt 1 15001-
16 01643-31232 Washer 1 15001-
17 22P-06-11580 Bracket 1 15001-
18 01010-81225 Bolt 1 15001-
19 01643-31232 Washer 1 15001-
20 04434-52312 Clip 1 15001-
21 01010-81225 Bolt 1 15001-
22 01643-31232 Washer 1 15001-
23 04434-53412 Clip 2 15001-
24 01010-81225 Bolt 2 15001-
25 01643-31232 Washer 2 15001-
26 04434-53412 Clip 1 15001-
27 01010-81225 Bolt 1 15001-
28 01643-31232 Washer 1 15001-
29 20Y-01-21260 Spacer 1 15001-
30 08057-12012 Clip 1 15001-
Reference:E0200-001004 Page:E004005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Electric Wiring Harness, Wiring Harness Clamp, Revolving Frame (#15001-)
Index Code Part Number Description Qty Serial No.
31 08211-01920 Clip 1 15001-
32 01010-81245 Bolt 1 15001-
33 01643-31232 Washer 1 15001-
34 08057-14012 Clip 1 15001-
35 01010-81225 Bolt 1 15001-
36 01643-31232 Washer 1 15001-
37 08211-01920 Clip 1 15001-
38 21W-62-22510 Grommet 1 15001-
39 01010-81035 Bolt 5 15001-
40 01643-31032 Washer 5 15001-
41 6205-81-9580 Spacer 5 15001-
42 08057-12012 Clip 1 15001-
43 08211-01920 Clip 1 15001-
44 01010-81225 Bolt 1 15001-
45 01643-31232 Washer 1 15001-
46 08193-30012 Clip 1 15001-
47 01010-81225 Bolt 1 15001-
48 01643-31232 Washer 1 15001-
49 22T-56-23290 Spacer 1 15001-
50 01010-81040 Bolt 1 15001-
51 01643-31032 Washer 1 15001-
52 08057-12012 Clip 1 15001-
53 08211-00720 Clip 1 15001-
54 01010-81225 Bolt 1 15001-
55 01643-31232 Washer 1 15001-
56 04434-51012 Clip 1 15001-
57 01010-81225 Bolt 1 15001-
58 01643-31232 Washer 1 15001-
59 08193-20010 Clip 1 15358-
60 01010-81016 Bolt 1 15358-
61 01643-31032 Washer 1 15358-

Reference:E0200-001004 Page:E004005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001369

23
24
10 22
4
5
20 18
2 19
21
15
16 13 11
14 12
17
3
7
1 8
1
9

Reference:E0200-001005 Page:E004006

PC78US-8 S/N 15001-UP


Electric Wiring Harness, Wiring Harness Clamp, Control Valve (#15001-)
Index Code Part Number Description Qty Serial No.
1 08211-01920 Clip 2 15001-
2 08211-01520 Clip 1 15001-
3 04434-51910 Clip 2 15001-
4 01010-81020 Bolt 2 15001-
5 01643-31032 Washer 2 15001-
6 08057-12010 Clip 1 15001-
7 08211-11520 Clip 1 15001-
8 01010-81020 Bolt 1 15001-
9 01643-31032 Washer 1 15001-
10 08211-11320 Clip 2 15001-
11 22P-06-11531 Bracket 1 15001-
12 01010-81040 Bolt 2 15001-
13 01643-31032 Washer 2 15001-
14 04434-51710 Clip 1 15001-
15 04434-51710 Clip 1 15001-
16 07095-20211 Cushion 1 15001-
17 07095-20211 Cushion 1 15001-
18 01010-81020 Bolt 1 15001-
19 01643-31032 Washer 1 15001-
20 01010-81020 Bolt 1 15001-
21 01643-31032 Washer 1 15001-
22 600-051-2060 Clip 1 15001-
23 01010-81020 Bolt 1 15001-
24 01643-31032 Washer 1 15001-

Reference:E0200-001005 Page:E004006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000521

7
1 2
8
6

Reference:E0200-001006 Page:E004007

PC78US-8 S/N 15001-UP


Electric Wiring Harness, Wiring Harness Clamp, Floor Frame (#15001-)
Index Code Part Number Description Qty Serial No.
1 08211-00720 Clip 1 15001-
2 08211-01020 Clip 2 15001-
3 04434-51912 Clip 1 15001-
4 01010-81225 Bolt 1 15001-
5 01643-31232 Washer 1 15001-
6 22P-06-11810 Bracket 1 15001-
7 01010-81225 Bolt 1 15001-
8 01643-31232 Washer 1 15001-

Reference:E0200-001006 Page:E004007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000523
4
5
1
7
6
3
1
2

Reference:E0200-001007 Page:E004008

PC78US-8 S/N 15001-UP


Electric Wiring Harness, Fuse Holder (#15001-)
Index Code Part Number Description Qty Serial No.
1 421-06-22880 Holder 1 15001-
2 421-06-22990 Bolt 4 15001-
3 421-06-22910 Bracket 1 15001-
4 01010-80816 Bolt 1 15001-
5 01643-30823 Washer 1 15001-
6 421-06-22830 Fuse, 120Amp. 1 15001-
7 417-06-22610 Fuse, 50Amp. 1 15001-

Reference:E0200-001007 Page:E004008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA021244
18
17

16

14
2 12
3 19 13
15 11
9
1 10
15
15 8
4
5
6
20 7
21

24
23
22

Reference:E0200-001008 Page:E004009

PC78US-8 S/N 15001-UP


Electric Wiring Harness, Wiring Harness Clamp, Battery Relay and Ground Cable (#15001-28942)
Index Code Part Number Description Qty Serial No.
1 08088-30000 Switch, Battery Relay 1 15001-28942
2 01010-80830 Bolt 2 15001-@
3 01643-30823 Washer 2 15001-@
4 04434-51912 Clip 1 15001-@
5 20Y-03-11220 Collar 1 15001-@
6 01010-81260 Bolt 1 15001-@
7 01643-31232 Washer 1 15001-@
8 04434-51912 Clip 1 15001-@
9 01010-81220 Bolt 1 15001-@
10 01643-31232 Washer 1 15001-@
11 04434-52312 Clip 1 15001-@
12 01010-81220 Bolt 1 15001-@
13 01643-31232 Washer 1 15001-@
14 08211-01020 Clip 1 15001-@
15 08211-00720 Clip 3 15001-@
16 21W-06-42250 Sheet 1 15001-@
17 01643-30823 Washer 2 15001-@
18 01434-00820 Bolt, Wing 2 15001-@
19 08038-00519 Cap 2 15001-@
20 01010-81020 Bolt 1 15001-@
21 01643-31032 Washer 1 15001-@
22 08028-43030 Cable, Ground 1 15001-@
23 01010-81020 Bolt 2 15001-@
24 01643-31032 Washer 2 15001-@

Reference:E0200-001008 Page:E004009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA021085
18
17

16

14
2 12
3 19 13
15 11
9
1 10
15
15 8
4
5
6
20 7
21

24
23
22

Reference:E0200-001008A Page:E004010

PC78US-8 S/N 15001-UP


Electric Wiring Harness, Wiring Harness Clamp, Battery Relay and Ground Cable (#28943-)
Index Code Part Number Description Qty Serial No.
1 08088-70000 Switch, Battery Relay 1 28943-
2 01010-80830 Bolt 2 15001-
3 01643-30823 Washer 2 15001-
4 04434-51912 Clip 1 15001-
5 20Y-03-11220 Collar 1 15001-
6 01010-81260 Bolt 1 15001-
7 01643-31232 Washer 1 15001-
8 04434-51912 Clip 1 15001-
9 01010-81220 Bolt 1 15001-
10 01643-31232 Washer 1 15001-
11 04434-52312 Clip 1 15001-
12 01010-81220 Bolt 1 15001-
13 01643-31232 Washer 1 15001-
14 08211-01020 Clip 1 15001-
15 08211-00720 Clip 3 15001-
16 21W-06-42250 Sheet 1 15001-
17 01643-30823 Washer 2 15001-
18 01434-00820 Bolt, Wing 2 15001-
19 08038-00519 Cap 2 15001-
20 01010-81020 Bolt 1 15001-
21 01643-31032 Washer 1 15001-
22 08028-43030 Cable, Ground 1 15001-
23 01010-81020 Bolt 2 15001-
24 01643-31032 Washer 2 15001-

Reference:E0200-001008A Page:E004010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001371

1
3
2

Reference:E0200-001009 Page:E004011

PC78US-8 S/N 15001-UP


Electric Wiring Harness, Horn (#15001-)
Index Code Part Number Description Qty Serial No.
1 08160-72400 Horn 1 15001-
2 01010-80816 Bolt 2 15001-
3 01643-30823 Washer 2 15001-

Reference:E0200-001009 Page:E004011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Front Working Lamp
FIG. Name FIG. No.
Front Working Lamp E0310-002001

Reference:X22-1036890 Page:E005000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000805

4
3

Reference:E0310-002001 Page:E005001

PC78US-8 S/N 15001-UP


Front Working Lamp (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-53-18710 Working Lamp Assembly 1 15001-
2 22B-54-17271 Grommet 1 15001-
421-06-23330 Bulb, 70watt 1 15001-
3 01010-D1016 Bolt 1 15001-
4 01643-71032 Washer 1 15001-

Reference:E0310-002001 Page:E005001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Travel Alarm
FIG. Name FIG. No.
Travel Alarm E0420-001001

Reference:X22-1030151 Page:E006000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000542

13 6
12
10 5
11

4
1
8 2

9 3

Reference:E0420-001001 Page:E006001

PC78US-8 S/N 15001-UP


Travel Alarm (#15001-)
Index Code Part Number Description Qty Serial No.
1 362-06-57120 Backup Alarm 1 15001-
2 01010-80616 Bolt 2 15001-
3 01643-30623 Washer 2 15001-
4 08193-20012 Clip 1 15001-
5 01010-81225 Bolt 1 15001-
6 01643-31232 Washer 1 15001-
7 22P-06-11640 Plate 1 15001-
8 01010-81030 Bolt 2 15001-
9 01643-31032 Washer 2 15001-
10 04434-50612 Clip 1 15001-
11 01010-81245 Bolt 1 15001-
12 01643-31232 Washer 1 15001-
13 20Y-01-21260 Spacer 1 15001-

Reference:E0420-001001 Page:E006001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
HYDRAULIC SYSTEM
Unit Name
Hydraulic Tank X
Hydraulic Tank X
Control Valve, Without Blade X
Control Valve, With 1-Service Valve, Without Blade X
Control Valve, With 1-Additional Actuator Piping, Without Blade X
Control Valve, With Blade X
Control Valve, With Blade, 1-Service Valve X
Control Valve, With Blade, 1-Additional Actuator Piping X
Hydraulic Pump, Without Blade X
Hydraulic Pump, With Blade X
Suction Piping, Without Blade X
Suction Piping, With Blade X
Delivery Piping, Without Blade X
Delivery Piping, With Blade X
Delivery Piping, With Blade, For Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Additional Filter X
Oil Cooler Piping, Without 1-Additional Actuator Piping X
Oil Cooler Piping, Without 1-Additional Actuator Piping X
Oil Cooler Piping, With 1-Additional Actuator Piping X
Oil Cooler Piping, With 1-Additional Actuator Piping X
Return Piping, Without 1-Additional Actuator Piping X
Return Piping, With 1-Additional Actuator Piping X
Drain Piping, Without Arm Crane, Overload Alarm X
Drain Piping, With Overload Alarm X
Drain Piping, With Overload Alarm, Arm Anti-drop Valve X
Boom Piping X
Arm and Bucket Piping, Without 1-Additional Actuator Piping X
Arm and Bucket Piping, With 1-Additional Actuator Piping X
Additional Actuator Piping, With 1-Service Valve X
Additional Actuator Piping, With 1-Additional Actuator Piping X
Blade Piping X
Travel Piping, Without Blade X
Travel Piping, With Blade X
Swing Piping X
Swing Piping X
Solenoid Valve, Without Control Pattern Change Over Valve X
Proportional Pressure Control (PPC) Valve Piping, Without Blade X
Proportional Pressure Control (PPC) Valve Piping, With Arm Anti-drop Valve, Boom Anti-drop Valve, Without Blade X
Proportional Pressure Control (PPC) Valve Piping, With Control Pattern Change Over Valve (ISO/BACKHOE), Without Blade X
Proportional Pressure Control (PPC) Valve Piping, With Blade X
Proportional Pressure Control (PPC) Valve Piping, With Blade, Arm Anti-drop Valve, Boom Anti-drop Valve X
Proportional Pressure Control (PPC) Valve Piping, With Blade, Control Pattern Change Over Valve (ISO/BACKHOE) X
Proportional Pressure Control (PPC) Valve Piping, Spanish, USA, Without Blade X
Proportional Pressure Control (PPC) Valve Piping, Spanish, USA, With Blade X

Reference: Page:H000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hydraulic Tank
FIG. Name FIG. No.
Hydraulic Tank H0110-001001

Reference:X22-1030162 Page:H001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000613
19

20
15
32
16 4

2 5
3

17 11
12 14
18
9
21
10
13
22 7

6
26
23 8 31
29
28 30
27

33

34
1

25
24

Reference:H0110-001001 Page:H001001

PC78US-8 S/N 15001-UP


Hydraulic Tank (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 22P-60-11111 Tank 1 15001-15739
2 201-60-12172 Filler 1 15001-15739
3 20Y-60-21340 Gasket 1 15001-15739
4 01252-70516 Bolt 6 15001-15739
5 01601-20513 Washer 6 15001-15739
6 21W-60-41170 Valve Assembly 1 15001-15739
7 20X-60-22140 Spring 1 15001-15739
8 21W-60-41121 Element 1 15001-15739
9 21W-60-41290 Cover 1 15001-15739
10 07000-12135 O-ring 1 15001-15739
11 01010-81025 Bolt 3 15001-15739
12 01643-31032 Washer 3 15001-15739
13 07270-00871 Tube 1 15001-15739
14 07285-00095 Clip, Hose 1 15001-15739
15 22P-60-11150 Cap 1 15001-15739
16 423-60-35460 Element 1 15001-15739
17 22P-60-11121 Cover 1 15001-15739
18 07000-12145 O-ring 1 15001-15739
19 01010-81035 Bolt 4 15001-15739
20 01643-31032 Washer 4 15001-15739
21 12R-60-11230 Spring 1 15001-15739
22 22P-60-11130 Rod 1 15001-15739
23 21W-60-41150 Strainer Assembly 1 15001-15739
24 07044-12412 Plug 1 15001-15739
25 07002-12434 O-ring 1 15001-15739
26 201-60-65240 Tube 1 15001-15739
203-60-31100 Elbow Assembly 2 15001-15739
27 C1 Elbow 1 15001-15739
28 203-60-31240 Nut 1 15001-15739
29 203-60-31250 Sleeve 1 15001-15739
Reference:H0110-001001 Page:H001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hydraulic Tank (#15001-15739)
Index Code Part Number Description Qty Serial No.
30 130-06-44711 Grommet 1 15001-15739
31 21X-54-32350 Cap 2 15001-15739
32 21W-60-43120 Plate 1 15001-15739
33 01010-81230 Bolt 4 15001-15739
34 01643-31232 Washer 4 15001-15739

Reference:H0110-001001 Page:H001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hydraulic Tank
FIG. Name FIG. No.
Hydraulic Tank H0110-003001

Reference:X22-1094211 Page:H002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000613
19

20
15
32
16 4

2 5
3

17 11
12 14
18
9
21
10
13
22 7

6
26
23 8 31
29
28 30
27

33

34
1

25
24

Reference:H0110-003001 Page:H002001

PC78US-8 S/N 15001-UP


Hydraulic Tank (#15740-)
Index Code Part Number Description Qty Serial No.
1 21W-60-55110 Tank 1 15740-
2 201-60-12172 Filler 1 15740-
3 20Y-60-21340 Gasket 1 15740-
4 01252-70516 Bolt 6 15740-
5 01601-20513 Washer 6 15740-
6 21W-60-41170 Valve Assembly 1 15740-
7 20X-60-22140 Spring 1 15740-
8 21W-60-41121 Element 1 15740-
9 21W-60-41290 Cover 1 15740-
10 07000-12135 O-ring 1 15740-
11 01010-81025 Bolt 3 15740-
12 01643-31032 Washer 3 15740-
13 07270-00871 Tube 1 15740-
14 07285-00095 Clip, Hose 1 15740-
15 22P-60-11150 Cap 1 15740-
16 423-60-35460 Element 1 15740-
17 22P-60-11121 Cover 1 15740-
18 07000-12145 O-ring 1 15740-
19 01010-81035 Bolt 4 15740-
20 01643-31032 Washer 4 15740-
21 12R-60-11230 Spring 1 15740-
22 22P-60-11130 Rod 1 15740-
23 21W-60-41150 Strainer Assembly 1 15740-
24 07044-12412 Plug 1 15740-
25 07002-12434 O-ring 1 15740-
26 201-60-65240 Tube 1 15740-
203-60-31100 Elbow Assembly 2 15740-
27 C1 Elbow 1 15740-
28 203-60-31240 Nut 1 15740-
29 203-60-31250 Sleeve 1 15740-
Reference:H0110-003001 Page:H002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hydraulic Tank (#15740-)
Index Code Part Number Description Qty Serial No.
30 130-06-44711 Grommet 1 15740-
31 21X-54-32350 Cap 2 15740-
32 21W-60-43120 Plate 1 15740-
33 01010-81230 Bolt 4 15740-
34 01643-31232 Washer 4 15740-

Reference:H0110-003001 Page:H002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, Without Blade
FIG. Name FIG. No.
Control Valve, 6-Valve (1/16) (#15001-16106) H0120-001001
Control Valve, 6-Valve (1/16) (#16107-) H0120-001001A
Control Valve, 6-Valve (2/16) (#15001-16106) H0120-001002
Control Valve, 6-Valve (2/16) (#16107-) H0120-001002A
Control Valve, 6-Valve (3/16) H0120-001003
Control Valve, 6-Valve (4/16) H0120-001004
Control Valve, 6-Valve (5/16) H0120-001005
Control Valve, 6-Valve (6/16) (#15001-15487) H0120-001006
Control Valve, 6-Valve (6/16) (#15488-) H0120-001006A
Control Valve, 6-Valve (7/16) H0120-001007
Control Valve, 6-Valve (8/16) H0120-001008
Control Valve, 6-Valve (9/16) (#15001-16106) H0120-001009
Control Valve, 6-Valve (9/16) (#16107-) H0120-001009A
Control Valve, 6-Valve (10/16) H0120-001010
Control Valve, 6-Valve (11/16) H0120-001011
Control Valve, 6-Valve (12/16) H0120-001012
Control Valve, 6-Valve (13/16) H0120-001013
Control Valve, 6-Valve (14/16) H0120-001014
Control Valve, 6-Valve (15/16) H0120-001015
Control Valve, 6-Valve (16/16) H0120-001016
Control Valve, Mounting H0120-001017

Reference:X22-1038890 Page:H003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012800
2
3 1

10 5
9 4
7
8
6

Reference:H0120-001001 Page:H003001

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (1/16) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-26-52201 Valve Assembly, Control 1 15488-16106
723-26-52200 Valve Assembly, Control 1 15001-15487
C1 Cover Group 1 15001-16106
1 723-26-21741 Cover 1 15001-16106
2 708-8E-16160 Plug 1 15001-@
3 07002-11023 O-ring 1 15001-@
4 702-21-55620 Plug 1 15001-@
5 07002-11423 O-ring 1 15001-@
6 723-26-16630 Plug 1 15001-16106
7 07000-11009 O-ring 1 15001-16106
8 07001-01009 Ring, Back-up 1 15001-16106
9 07000-11007 O-ring 1 15001-16106
10 07001-01007 Ring, Back-up 1 15001-16106

Reference:H0120-001001 Page:H003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016304
2
3
1

11 5
9 4
12
13
10 7
6
8
16
15
14

Reference:H0120-001001A Page:H003002

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (1/16) (#16107-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
C1 Cover Group 1 16107-
1 C1 Cover 1 16107-
2 708-8E-16160 Plug 1 15001-
3 07002-11023 O-ring 1 15001-
4 702-21-55620 Plug 1 15001-
5 07002-11423 O-ring 1 15001-
6 702-21-53120 Filter 1 16107-
7 702-21-55420 O-ring 1 16107-
8 C1 Seat 1 16107-
9 723-11-38620 Plug 1 16107-
10 723-26-16990 Plug 1 16107-
11 07002-11223 O-ring 1 16107-
12 07000-11003 O-ring 2 16107-
13 07001-01003 Ring, Back-up 1 16107-
14 723-11-14390 Filter 1 16107-
15 07002-12434 O-ring 1 16107-
16 723-11-19130 O-ring 1 16107-

Reference:H0120-001001A Page:H003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016305

7
4
6
23 5
24 8
20
17
1
12
7 14
4 9
6
23 17
5 8 21
24
18 24
17 23
2
12
7 14
4 10
6 15
23 16
5 8 14
24 13
22 17
17 21
3 24
12
14 23
11
15
16
14
13
17 28
19 31 29

27
30 26
32
25

Reference:H0120-001002 Page:H003003

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (2/16) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-26-52201 Valve Assembly, Control 1 15488-16106
723-26-52200 Valve Assembly, Control 1 15001-15487
C1 Body Group 1 15001-16106
1 C1 Block, Valve 1 15001-@
2 C1 Block, Valve 1 15001-@
3 C1 Block, Valve 1 15001-@
4 07000-12120 O-ring 3 15001-@
5 07000-12020 O-ring 3 15001-@
6 723-26-15830 O-ring 3 15001-@
7 723-26-15840 O-ring 3 15001-@
8 07000-11008 O-ring 6 15001-@
9 C1 Spool 1 15001-@
10 C1 Spool 1 15001-@
11 C1 Spool 1 15001-@
12 C1 Plug 3 15001-@
13 C1 Plug 2 15001-@
14 C1 O-ring 5 15001-@
15 C1 Valve 2 15001-@
16 C1 Spring 2 15001-@
17 723-26-15121 Retainer 6 15001-@
18 709-26-11450 Spring 1 15001-@
19 723-26-14490 Spring 1 15001-@
20 723-26-16621 Spring 1 15001-@
21 723-26-14510 Spring 2 15001-@
22 723-26-16621 Spring 1 15001-@
23 723-26-15110 Case 5 15001-@
24 575-41-17420 O-ring 5 15001-16106
723-20-91202 Case Subassembly 1 15001-16106
25 C1 Case 1 15001-16106
26 C1 Seat 1 15001-16106
Reference:H0120-001002 Page:H003003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 6-Valve (2/16) (#15001-16106)
Index Code Part Number Description Qty Serial No.
27 C1 Ball 1 15001-16106
28 C1 Plug 1 15001-16106
29 07002-10823 O-ring 1 15001-16106
30 575-41-17420 O-ring 1 15001-16106
31 07000-11006 O-ring 1 15001-16106
32 702-21-54260 O-ring 1 15001-16106

Reference:H0120-001002 Page:H003003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016306

7
4
6
23 5
24 8
20
17
1
12
7 14
4 9
6
23 17
5 8 21
24
18 24
17 23
2
12
7 14
4 10
6 15
23 16
5 8 14
24 13
22 17
17 21
3 24
12 23
14
11
15
16
14
13
17
19

24

25
26

Reference:H0120-001002A Page:H003004

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (2/16) (#16107-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Block, Valve 1 15001-
2 C1 Block, Valve 1 15001-
3 C1 Block, Valve 1 15001-
4 07000-12120 O-ring 3 15001-
5 07000-12020 O-ring 3 15001-
6 723-26-15830 O-ring 3 15001-
7 723-26-15840 O-ring 3 15001-
8 07000-11008 O-ring 6 15001-
9 C1 Spool 1 15001-
10 C1 Spool 1 15001-
11 C1 Spool 1 15001-
12 C1 Plug 3 15001-
13 C1 Plug 2 15001-
14 C1 O-ring 5 15001-
15 C1 Valve 2 15001-
16 C1 Spring 2 15001-
17 723-26-15121 Retainer 6 15001-
18 709-26-11450 Spring 1 15001-
19 723-26-14490 Spring 1 15001-
20 723-26-16621 Spring 1 15001-
21 723-26-14510 Spring 2 15001-
22 723-26-16621 Spring 1 15001-
23 723-26-15110 Case 5 15001-
24 575-41-17420 O-ring 6 16107-
25 702-21-54260 O-ring 1 16107-
26 723-26-17110 Case 1 16107-

Reference:H0120-001002A Page:H003004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012804

15
17
4
12

2
3 7
10
13
15 17
17 16
5

8
10
15 14
17
17 15
6
12

3
9 2
11
13
17
16

3
1

Reference:H0120-001003 Page:H003005

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (3/16) (#15001-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 01252-60635 Bolt, Hexagon Socket Head 3 15001-
2 01252-60630 Bolt, Hexagon Socket Head 10 15001-
3 01641-20608 Washer 13 15001-
4 C1 Valve 1 15001-
5 C1 Valve 1 15001-
6 C1 Valve 1 15001-
7 C1 Valve 1 15001-
8 C1 Valve 1 15001-
9 C1 Valve 1 15001-
10 C1 Piston 2 15001-
11 C1 Piston 1 15001-
12 723-26-14220 Spring 2 15001-
13 723-26-14240 Spring 2 15001-
14 723-26-14140 Spring 1 15001-
15 723-26-15230 Plug 4 15001-
16 723-26-15370 Plug 2 15001-
17 07002-12434 O-ring 6 15001-

Reference:H0120-001003 Page:H003005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012805

3
4
2
1

11
10
9
8

3
4
6
7
5

Reference:H0120-001004 Page:H003006

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (4/16) (#15001-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 723-26-15220 Plug 4 15001-
2 07002-11223 O-ring 4 15001-
3 C1 Valve 5 15001-
4 723-26-14150 Spring 5 15001-
5 723-26-16230 Plug 1 15001-
6 07000-11008 O-ring 1 15001-
7 07001-01008 Ring, Back-up 1 15001-
8 723-26-16240 Seat 1 15001-
9 C1 Valve 1 15001-
10 723-26-16260 Spring 1 15001-
11 723-26-16270 Retainer 1 15001-

Reference:H0120-001004 Page:H003006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016307

6
7
14
12
1

4
5
3 15
2
13
9
8
11
10

Reference:H0120-001005 Page:H003007

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (5/16) (#15001-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15488-16106
C1 Body Group 1 15001-15487
1 C1 Valve Body 1 16107-
C1 Valve Body 1 15001-16106
2 723-26-17180 Plug 2 16107-
723-11-38260 Plug 2 15001-16106
3 07002-11823 O-ring 2 15001-
4 C1 Valve 2 16107-
C1 Valve 2 15001-16106
5 723-26-17170 Spring 2 16107-
722-10-91130 Spring 2 15001-16106
6 723-11-26170 Plug 2 15001-
7 07002-11623 O-ring 2 15001-
8 723-26-16890 Plug 2 15001-
9 07002-11823 O-ring 2 15001-
10 708-8E-16160 Plug 2 15001-
11 07002-11023 O-ring 2 15001-
12 C1 Valve 2 16107-
C1 Valve 2 15001-16106
13 C1 Retainer 2 16107-
C1 Retainer 2 15001-16106
14 C1 Orifice 2 16107-
15 723-26-14640 Spring 2 15001-

Reference:H0120-001005 Page:H003007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012807

32
33
30

31
27
24 29 26
25
9 28
7 8 26
11
6 12
2 10
5
1
4
14 5
3 35
13 36
15 37
28 26
29
27
21
34 20
22
19
18
17

16
23

Reference:H0120-001006 Page:H003008

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (6/16) (#15001-15487)
Index Code Part Number Description Qty Serial No.
723-26-52200 Valve Assembly, Control 1 15001-15487
723-25-08900 Body Group 1 15001-15487
1 C1 Spool 1 15001-@
2 C1 Plug 1 15001-@
3 C1 Orifice 1 15001-@
4 C1 Seal 1 15001-@
5 C1 O-ring 2 15001-@
6 723-26-14650 Spring 1 15001-@
7 723-26-16940 Flange 1 15001-@
8 722-12-19120 O-ring 1 15001-@
9 01252-60640 Bolt, Hexagon Socket Head 2 15001-@
10 723-11-14350 Orifice 1 15001-@
11 722-12-15160 Seal 1 15001-@
12 07002-10823 O-ring 1 15001-@
13 723-26-16650 Flange 1 15001-15487
14 723-11-19110 O-ring 1 15001-@
15 01252-60820 Bolt, Hexagon Socket Head 2 15001-@
16 C1 Case 1 15001-@
17 723-11-19110 O-ring 1 15001-@
18 C1 Sleeve 1 15001-@
19 723-26-16420 Retainer 1 15001-@
20 C1 Piston 1 15001-@
21 C1 Valve 1 15001-@
22 723-26-16450 Spring 1 15001-@
23 01252-60855 Bolt, Hexagon Socket Head 2 15001-@
24 708-8E-16160 Plug 1 15001-@
25 07002-11023 O-ring 1 15001-@
26 C1 Plug, Stocking 4 15001-@
27 723-26-16460 Plug 2 15001-@
28 07000-11007 O-ring 2 15001-@
Reference:H0120-001006 Page:H003008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 6-Valve (6/16) (#15001-15487)
Index Code Part Number Description Qty Serial No.
29 07001-01007 Ring, Back-up 2 15001-@
30 07000-12120 O-ring 1 15001-@
31 07000-12020 O-ring 1 15001-@
32 723-26-15840 O-ring 1 15001-@
33 07000-11008 O-ring 1 15001-@
34 07000-11006 O-ring 1 15001-@
35 723-26-16920 Case 1 15001-@
36 722-12-19120 O-ring 1 15001-@
37 01252-60640 Bolt, Hexagon Socket Head 2 15001-@

Reference:H0120-001006 Page:H003008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY014088

35
36
33

34
30
27 32 29
28
9 31
7 8 29
11
6 12
2 10
5
1
4
15 5
3 38
16 39 40
31 29 17
14
32 13
30 18
24
37 23
25
22
21
20

19
26

Reference:H0120-001006A Page:H003009

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (6/16) (#15488-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15488-16106
1 C1 Spool 1 15001-
2 C1 Plug 1 15001-
3 C1 Orifice 1 15001-
4 C1 Seal 1 15001-
5 C1 O-ring 2 15001-
6 723-26-14650 Spring 1 15001-
7 723-26-16940 Flange 1 15001-
8 722-12-19120 O-ring 1 15001-
9 01252-60640 Bolt, Hexagon Socket Head 2 15001-
10 723-11-14350 Orifice 1 15001-
11 722-12-15160 Seal 1 15001-
12 07002-10823 O-ring 1 15001-
13 723-26-16350 Flange 1 15488-
14 723-11-19110 O-ring 1 15001-
15 723-26-16360 Sleeve 1 15488-
16 723-26-16371 Piston 1 15488-
17 723-26-16380 Spring 1 15488-
18 01252-60820 Bolt, Hexagon Socket Head 2 15001-
19 C1 Case 1 15001-
20 723-11-19110 O-ring 1 15001-
21 C1 Sleeve 1 15001-
22 723-26-16420 Retainer 1 15001-
23 C1 Piston 1 15001-
24 C1 Valve 1 15001-
25 723-26-16450 Spring 1 15001-
26 01252-60855 Bolt, Hexagon Socket Head 2 15001-
27 708-8E-16160 Plug 1 15001-
Reference:H0120-001006A Page:H003009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 6-Valve (6/16) (#15488-)
Index Code Part Number Description Qty Serial No.
28 07002-11023 O-ring 1 15001-
29 C1 Plug, Stocking 4 15001-
30 723-26-16460 Plug 2 15001-
31 07000-11007 O-ring 2 15001-
32 07001-01007 Ring, Back-up 2 15001-
33 07000-12120 O-ring 1 15001-
34 07000-12020 O-ring 1 15001-
35 723-26-15840 O-ring 1 15001-
36 07000-11008 O-ring 1 15001-
37 07000-11006 O-ring 1 15001-
38 723-26-16920 Case 1 15001-
39 722-12-19120 O-ring 1 15001-
40 01252-60640 Bolt, Hexagon Socket Head 2 15001-

Reference:H0120-001006A Page:H003009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012808

7 8
6

6
5
5 8 8
7
9
7
6
8
6
3

Reference:H0120-001007 Page:H003010

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (7/16) (#15001-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Valve Body 1 15001-
2 C1 Valve Body 1 15001-
3 C1 Valve Body 1 15001-
4 C1 Block 1 16107-
C1 Valve Body 1 15001-16106
5 07000-12100 O-ring 4 15001-
6 723-11-19130 O-ring 7 15001-
7 723-11-19110 O-ring 3 15001-
8 07000-11006 O-ring 7 15001-
9 702-21-54260 O-ring 1 15001-

Reference:H0120-001007 Page:H003010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016308

24
22
23
16
13
14
12

24 1
22
23 23
16 20
13
15 25
12
4
6
8
7
25 2
21 7
23 8
17 6
9 5
11 23
10 22
24
3
18
19

Reference:H0120-001008 Page:H003011

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (8/16) (#15001-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Spool 2 16107-
C1 Spool 2 15001-16106
2 C1 Spool 1 15001-
3 C1 Spool 1 15001-
4 C1 Plug 1 15001-
5 C1 Plug 1 15001-
6 C1 O-ring 2 15001-
7 723-11-17490 Poppet 2 15001-
8 723-11-17510 Spring 2 15001-
9 723-26-16470 Plug 1 15001-
10 07000-11005 O-ring 1 15001-
11 07001-01005 Ring, Back-up 1 15001-
12 723-11-17330 Retainer 3 15001-
13 723-11-17353 Retainer 3 15001-
14 723-11-17341 Spring 2 15001-
15 723-11-16991 Spring 1 15001-
16 723-11-17361 Bolt 3 15001-
17 723-26-16480 Retainer 1 15001-
18 723-26-16490 Spacer 1 15001-
19 723-26-14310 Spring 1 15001-
20 723-11-37220 Case 2 15001-
21 723-11-17410 Case, Spring 1 15001-
22 723-11-27880 Case 4 15001-
23 722-12-19120 O-ring 7 15001-
24 01252-60640 Bolt, Hexagon Socket Head 8 15001-
25 01252-60620 Bolt, Hexagon Socket Head 6 15001-

Reference:H0120-001008 Page:H003011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012811

11
12
3
9
1 10
12
11 11
12
3
9
2 10
12
11 11
12
3
4 6
5 7
8
12
15 11

14
13

17
16

Reference:H0120-001009 Page:H003012

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (9/16) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-26-52201 Valve Assembly, Control 1 15488-16106
723-26-52200 Valve Assembly, Control 1 15001-15487
C1 Body Group 1 15001-16106
1 C1 Valve 1 15001-@
2 C1 Valve 1 15001-@
3 C1 Orifice 3 15001-16106
4 C1 Valve 1 15001-@
5 723-11-15130 Spring 1 15001-@
6 C1 Valve 1 15001-@
7 C1 Piston 1 15001-@
8 723-11-16130 Spring 1 15001-@
9 C1 Valve Subassembly 2 15001-@
10 723-11-16230 Spring 2 15001-@
11 723-11-15110 Plug 6 15001-@
12 07002-11623 O-ring 6 15001-@
13 723-26-15230 Plug 2 15001-@
14 07002-12434 O-ring 2 15001-@
15 C1 Plug, Stocking 1 15001-@
16 706-8E-14191 Plug 1 15001-@
17 07002-11823 O-ring 1 15001-@

Reference:H0120-001009 Page:H003012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016309

14
15
4
12
1 13
15
14 14
15
4
12
2 13
15
14
14
15
3
5 7
6 8
9
15
14
10 16
17
11

18

17
16

20
19

Reference:H0120-001009A Page:H003013

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (9/16) (#16107-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Valve 1 15001-
2 C1 Valve 1 15001-
3 C1 Orifice 1 16107-
4 C1 Orifice 2 16107-
5 C1 Valve 1 15001-
6 723-11-15130 Spring 1 15001-
7 C1 Valve 1 15001-
8 C1 Piston 1 15001-
9 723-11-16130 Spring 1 15001-
10 702-21-53120 Filter 1 16107-
11 702-21-55420 O-ring 1 16107-
12 C1 Valve Subassembly 2 15001-
13 723-11-16230 Spring 2 15001-
14 723-11-15110 Plug 6 15001-
15 07002-11623 O-ring 6 15001-
16 723-26-15230 Plug 2 15001-
17 07002-12434 O-ring 2 15001-
18 C1 Plug, Stocking 1 15001-
19 706-8E-14191 Plug 1 15001-
20 07002-11823 O-ring 1 15001-

Reference:H0120-001009A Page:H003013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012812
10

6
8
5

Reference:H0120-001010 Page:H003014

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (10/16) (#15001-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
1 700-25-11120 Bolt 4 15001-
2 01643-31032 Washer 4 15001-
3 723-11-29660 Bolt 4 15001-
4 01643-30823 Washer 4 15001-
5 723-26-16510 Bolt 6 15001-
6 01643-30623 Washer 6 15001-
7 01252-60650 Bolt, Hexagon Socket Head 4 15001-
8 01252-60635 Bolt, Hexagon Socket Head 2 15001-
9 01252-60616 Bolt, Hexagon Socket Head 2 15001-
10 04530-10815 Bolt, Eye 2 15001-

Reference:H0120-001010 Page:H003014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012813

1
4
3
2

Reference:H0120-001011 Page:H003015

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (11/16) (#15001-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
1 723-20-63300 Valve, Relief 1 15001-
2 700-22-11410 O-ring 1 15001-
3 700-80-64220 Ring, Back-up 1 15001-
4 07002-12434 O-ring 1 15001-

Reference:H0120-001011 Page:H003015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012814

Reference:H0120-001012 Page:H003016

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (12/16) (#15001-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
1 723-20-64200 Valve Assembly, Suction and Relief 1 15001-
2 07002-12034 O-ring 2 15001-

Reference:H0120-001012 Page:H003016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012815
2

Reference:H0120-001013 Page:H003017

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (13/16) (#15001-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
1 723-20-80100 Valve Assembly, Suction 8 15001-
2 07002-12034 O-ring 1 15001-
3 723-10-80200 Valve Assembly, Suction 2 15001-
4 07002-12034 O-ring 1 15001-

Reference:H0120-001013 Page:H003017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012816

1
9
8
9
8

10
11
12
13
6 20
2 14
17
16
15
18
19
6
7
5
4 3

Reference:H0120-001014 Page:H003018

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (14/16) (#15001-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
723-20-96200 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Plate 1 15001-
3 C1 Plug 1 15001-
4 01010-80620 Bolt 1 15001-
5 01643-30623 Washer 1 15001-
6 723-11-29490 O-ring 2 15001-
7 07000-11009 O-ring 1 15001-
8 07000-11006 O-ring 2 15001-
9 723-11-18150 O-ring 3 15001-
10 C1 Valve 1 15001-
11 C1 Orifice 1 15001-
12 C1 Seal 1 15001-
13 723-20-96140 Spring 1 15001-
723-26-00710 Valve Subassembly 1 15001-
14 C1 Piston 1 15001-
15 C1 Sleeve 1 15001-
16 07000-11010 O-ring 1 15001-
17 07001-01010 Ring, Back-up 1 15001-
18 07000-12012 O-ring 1 15001-
19 07001-02012 Ring, Back-up 1 15001-
20 723-11-19950 Spring 1 15001-

Reference:H0120-001014 Page:H003018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012817

7
8
3
2

1
7
8
6 8
5 7
11 4

12
9
11 10

Reference:H0120-001015 Page:H003019

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (15/16) (#15001-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
723-11-02760 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Spool 1 15001-
3 723-11-27830 Spring 1 15001-
4 C1 Valve 1 15001-
5 723-11-18180 Spring 1 15001-
6 723-11-27840 Spacer 1 15001-
7 723-11-27850 Plug 3 15001-
8 07002-11023 O-ring 3 15001-
9 C1 Orifice 1 15001-
10 C1 Plug, Stocking 1 15001-
11 07000-11005 O-ring 3 15001-
12 07000-11007 O-ring 2 15001-

Reference:H0120-001015 Page:H003019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012818

4
5
3
2
1

6
8
7

Reference:H0120-001016 Page:H003020

PC78US-8 S/N 15001-UP


Control Valve, 6-Valve (16/16) (#15001-)
Index Code Part Number Description Qty Serial No.
723-26-52202 Valve, Control 1 16107-
723-11-02590 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Valve 1 15001-
3 723-11-18180 Spring 1 15001-
4 723-11-18190 Plug 1 15001-
5 07002-11023 O-ring 1 15001-
6 C1 Orifice 1 15001-
7 07000-11006 O-ring 1 15001-
8 07000-11008 O-ring 1 15001-

Reference:H0120-001016 Page:H003020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001607
12

13
15

14

11

6
7 1
5
4
2
3 10

9
4
8

Reference:H0120-001017 Page:H003021

PC78US-8 S/N 15001-UP


Control Valve, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-52111 Bracket 1 15001-
2 21W-62-11620 Spacer 4 15001-
3 07000-13025 O-ring 4 15001-
4 203-62-42770 Cushion 8 15001-
5 566-35-42430 Plate 4 15001-
6 01010-81245 Bolt 4 15001-
7 01643-31232 Washer 4 15001-
8 01010-81430 Bolt 4 15001-
9 01643-31445 Washer, Flat 4 15001-
10 21W-62-51731 Seal 1 15001-
11 21W-62-51480 Bracket 1 15001-
12 01010-80845 Bolt 2 15001-
13 01643-30823 Washer 2 15001-
14 21W-62-52390 Sheet 1 15001-
15 201-54-35890 Collar 2 15001-

Reference:H0120-001017 Page:H003021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, With 1-Service Valve, Without Blade
FIG. Name FIG. No.
Control Valve, 7-Valve (1/18) (#15001-16106) H0120-005001
Control Valve, 7-Valve (1/18) (#16107-) H0120-005001A
Control Valve, 7-Valve (2/18) (#15001-16106) H0120-005002
Control Valve, 7-Valve (2/18) (#16107-) H0120-005002A
Control Valve, 7-Valve (3/18) H0120-005003
Control Valve, 7-Valve (4/18) H0120-005004
Control Valve, 7-Valve (5/18) H0120-005005
Control Valve, 7-Valve (6/18) (#15001-16106) H0120-005006
Control Valve, 7-Valve (6/18) (#16107-) H0120-005006A
Control Valve, 7-Valve (7/18) H0120-005007
Control Valve, 7-Valve (8/18) H0120-005008
Control Valve, 7-Valve (9/18) (#15001-16106) H0120-005009
Control Valve, 7-Valve (9/18) (#16107-) H0120-005009A
Control Valve, 7-Valve (10/18) H0120-005010
Control Valve, 7-Valve (11/18) H0120-005011
Control Valve, 7-Valve (12/18) H0120-005012
Control Valve, 7-Valve (13/18) H0120-005013
Control Valve, 7-Valve (14/18) H0120-005014
Control Valve, 7-Valve (15/18) H0120-005015
Control Valve, 7-Valve (16/18) H0120-005016
Control Valve, 7-Valve (17/18) H0120-005017
Control Valve, 7-Valve (18/18) H0120-005018
Control Valve, Mounting (#15001-15654) H0120-005019
Control Valve, Mounting (#15655-) H0120-005019A

Reference:X22-1039580 Page:H004000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011239
2
3 1

10 5
9 4
7
8
6

Reference:H0120-005001 Page:H004001

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (1/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-27-50801 Valve Assembly, Control 1 15488-16106
723-27-50800 Valve Assembly, Control 1 15001-15487
C1 Cover Group 1 15001-16106
1 723-26-21741 Cover 1 15001-16106
2 708-8E-16160 Plug 1 15001-@
3 07002-11023 O-ring 1 15001-@
4 702-21-55620 Plug 1 15001-@
5 07002-11423 O-ring 1 15001-@
6 723-26-16630 Plug 1 15001-16106
7 07000-11009 O-ring 1 15001-16106
8 07001-01009 Ring, Back-up 1 15001-16106
9 07000-11007 O-ring 1 15001-16106
10 07001-01007 Ring, Back-up 1 15001-16106

Reference:H0120-005001 Page:H004001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016297
2
3
1

11 5
9 4
12
13
10 7
6
8
16
15
14

Reference:H0120-005001A Page:H004002

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (1/18) (#16107-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Cover Group 1 16107-
1 C1 Cover 1 16107-
2 708-8E-16160 Plug 1 15001-
3 07002-11023 O-ring 1 15001-
4 702-21-55620 Plug 1 15001-
5 07002-11423 O-ring 1 15001-
6 702-21-53120 Filter 1 16107-
7 702-21-55420 O-ring 1 16107-
8 C1 Seat 1 16107-
9 723-11-38620 Plug 1 16107-
10 723-26-16990 Plug 1 16107-
11 07002-11223 O-ring 1 16107-
12 07000-11003 O-ring 2 16107-
13 07001-01003 Ring, Back-up 1 16107-
14 723-11-14390 Filter 1 16107-
15 07002-12434 O-ring 1 16107-
16 723-11-19130 O-ring 1 16107-

Reference:H0120-005001A Page:H004002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016298

7
4
6
23 5
24 8
20
17
1
12
7 14
4 9
6
23 17
5 8 21
24
18 24
17 23
2
12
7 14
4 10
6 15
23 16
5 8 14
24 13
22 17
17 21
3 24
12
14 23
11
15
16
14
13
17 28
19 31 29

27
30 26
32
25

Reference:H0120-005002 Page:H004003

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (2/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-27-50801 Valve Assembly, Control 1 15488-16106
723-27-50800 Valve Assembly, Control 1 15001-15487
C1 Body Group 1 15001-16106
1 C1 Block, Valve 1 15001-@
2 C1 Block, Valve 1 15001-@
3 C1 Block, Valve 1 15001-@
4 07000-12120 O-ring 3 15001-@
5 07000-12020 O-ring 3 15001-@
6 723-26-15830 O-ring 3 15001-@
7 723-26-15840 O-ring 3 15001-@
8 07000-11008 O-ring 6 15001-@
9 C1 Spool 1 15001-@
10 C1 Spool 1 15001-@
11 C1 Spool 1 15001-@
12 C1 Plug 3 15001-@
13 C1 Plug 2 15001-@
14 C1 O-ring 5 15001-@
15 C1 Valve 2 15001-@
16 C1 Spring 2 15001-@
17 723-26-15121 Retainer 6 15001-@
18 709-26-11450 Spring 1 15001-@
19 723-26-14490 Spring 1 15001-@
20 723-26-16621 Spring 1 15001-@
21 723-26-14510 Spring 2 15001-@
22 723-26-16621 Spring 1 15001-@
23 723-26-15110 Case 5 15001-@
24 575-41-17420 O-ring 5 15001-16106
723-20-91202 Case Subassembly 1 15001-16106
25 C1 Case 1 15001-16106
26 C1 Seat 1 15001-16106
Reference:H0120-005002 Page:H004003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 7-Valve (2/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
27 C1 Ball 1 15001-16106
28 C1 Plug 1 15001-16106
29 07002-10823 O-ring 1 15001-16106
30 575-41-17420 O-ring 1 15001-16106
31 07000-11006 O-ring 1 15001-16106
32 702-21-54260 O-ring 1 15001-16106

Reference:H0120-005002 Page:H004003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016299

7
4
6
23
5 8
24
20
17
1
12
7 14
4 9
6
23 17
5 8
24 21
18 24
17 23
2
12
7 14
4 10
6 15
23 16
5 14
24 8 13
22 17
17 21
3 24
12 23
14
11
15
16
14
13
17
19

24

25
26

Reference:H0120-005002A Page:H004004

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (2/18) (#16107-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Block, Valve 1 15001-
2 C1 Block, Valve 1 15001-
3 C1 Block, Valve 1 15001-
4 07000-12120 O-ring 3 15001-
5 07000-12020 O-ring 3 15001-
6 723-26-15830 O-ring 3 15001-
7 723-26-15840 O-ring 3 15001-
8 07000-11008 O-ring 6 15001-
9 C1 Spool 1 15001-
10 C1 Spool 1 15001-
11 C1 Spool 1 15001-
12 C1 Plug 3 15001-
13 C1 Plug 2 15001-
14 C1 O-ring 5 15001-
15 C1 Valve 2 15001-
16 C1 Spring 2 15001-
17 723-26-15121 Retainer 6 15001-
18 709-26-11450 Spring 1 15001-
19 723-26-14490 Spring 1 15001-
20 723-26-16621 Spring 1 15001-
21 723-26-14510 Spring 2 15001-
22 723-26-16621 Spring 1 15001-
23 723-26-15110 Case 5 15001-
24 575-41-17420 O-ring 6 16107-
25 702-21-54260 O-ring 1 16107-
26 723-26-17110 Case 1 16107-

Reference:H0120-005002A Page:H004004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011243

15
17
4
12

2
3 7
10
13
15 17
17 16
5

8
10
15 14
17
17 15
6
12

3
9 2
11
13
17
16

3
1

Reference:H0120-005003 Page:H004005

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (3/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 01252-60635 Bolt, Hexagon Socket Head 3 15001-
2 01252-60630 Bolt, Hexagon Socket Head 10 15001-
3 01641-20608 Washer 13 15001-
4 C1 Valve 1 15001-
5 C1 Valve 1 15001-
6 C1 Valve 1 15001-
7 C1 Valve 1 15001-
8 C1 Valve 1 15001-
9 C1 Valve 1 15001-
10 C1 Piston 2 15001-
11 C1 Piston 1 15001-
12 723-26-14220 Spring 2 15001-
13 723-26-14240 Spring 2 15001-
14 723-26-14140 Spring 1 15001-
15 723-26-15230 Plug 4 15001-
16 723-26-15370 Plug 2 15001-
17 07002-12434 O-ring 6 15001-

Reference:H0120-005003 Page:H004005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011244

3
4
2
1

11
10
9
8

3
4
6
7
5

Reference:H0120-005004 Page:H004006

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (4/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 723-26-15220 Plug 4 15001-
2 07002-11223 O-ring 4 15001-
3 C1 Valve 5 15001-
4 723-26-14150 Spring 5 15001-
5 723-26-16230 Plug 1 15001-
6 07000-11008 O-ring 1 15001-
7 07001-01008 Ring, Back-up 1 15001-
8 723-26-16240 Seat 1 15001-
9 C1 Valve 1 15001-
10 723-26-16260 Spring 1 15001-
11 723-26-16270 Retainer 1 15001-

Reference:H0120-005004 Page:H004006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016300

6
7
14
12
1

4
5
3 15
2
13
9
8
11
10

Reference:H0120-005005 Page:H004007

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (5/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15488-16106
C1 Body Group 1 15001-15487
1 C1 Valve Body 1 16107-
C1 Valve Body 1 15001-16106
2 723-26-17180 Plug 2 16107-
723-11-38260 Plug 2 15001-16106
3 07002-11823 O-ring 2 15001-
4 C1 Valve 2 16107-
C1 Valve 2 15001-16106
5 723-26-17170 Spring 2 16107-
722-10-91130 Spring 2 15001-16106
6 723-11-26170 Plug 2 15001-
7 07002-11623 O-ring 2 15001-
8 723-26-16890 Plug 2 15001-
9 07002-11823 O-ring 2 15001-
10 708-8E-16160 Plug 2 15001-
11 07002-11023 O-ring 2 15001-
12 C1 Valve 2 16107-
C1 Valve 2 15001-16106
13 C1 Retainer 2 16107-
C1 Retainer 2 15001-16106
14 C1 Orifice 2 16107-
15 723-26-14640 Spring 2 15001-

Reference:H0120-005005 Page:H004007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011246

32
33
30

31
27
24 29 26
25
9 28
7 8 26 11
6 12
2 10
5
1
4
14 5
3 35
13 36
15 37
28 26
29
27 21
34 20
22
19
18
17

16
23

Reference:H0120-005006 Page:H004008

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (6/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-27-50801 Valve Assembly, Control 1 15488-16106
723-27-50800 Valve Assembly, Control 1 15001-15487
723-25-00700 Body Group 1 15488-16106
C1 Body Group 1 15001-15487
1 C1 Spool 1 15001-@
2 C1 Plug 1 15001-@
3 C1 Orifice 1 15001-@
4 C1 Seal 1 15001-@
5 C1 O-ring 2 15001-@
6 723-26-14650 Spring 1 15001-@
7 723-26-16940 Flange 1 15001-@
8 722-12-19120 O-ring 1 15001-@
9 01252-60640 Bolt, Hexagon Socket Head 2 15001-@
10 723-11-14350 Orifice 1 15001-@
11 722-12-15160 Seal 1 15001-@
12 07002-10823 O-ring 1 15001-@
13 723-26-16650 Flange 1 15001-15487
14 723-11-19110 O-ring 1 15001-@
15 01252-60820 Bolt, Hexagon Socket Head 2 15001-@
16 C1 Case 1 15001-@
17 723-11-19110 O-ring 1 15001-@
18 C1 Sleeve 1 15001-@
19 723-26-16420 Retainer 1 15001-@
20 C1 Piston 1 15001-@
21 C1 Valve 1 15001-@
22 723-26-16450 Spring 1 15001-@
23 01252-60855 Bolt, Hexagon Socket Head 2 15001-@
24 708-8E-16160 Plug 1 15001-@
25 07002-11023 O-ring 1 15001-@
26 C1 Plug, Stocking 4 15001-@
Reference:H0120-005006 Page:H004008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 7-Valve (6/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
27 723-26-16460 Plug 2 15001-@
28 07000-11007 O-ring 2 15001-@
29 07001-01007 Ring, Back-up 2 15001-@
30 07000-12120 O-ring 1 15001-@
31 07000-12020 O-ring 1 15001-@
32 723-26-15840 O-ring 1 15001-@
33 07000-11008 O-ring 1 15001-@
34 07000-11006 O-ring 1 15001-@
35 723-26-16920 Case 1 15001-@
36 722-12-19120 O-ring 1 15001-@
37 01252-60640 Bolt, Hexagon Socket Head 2 15001-@

Reference:H0120-005006 Page:H004008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY014090

35
36
33

34
30
27 32 29
28
9 31
7 8 29
11
6 12
2 10
5
1
4
15 5
3 38
16 39 40
31 29 17
14
32 13
30 18
24
37 23
25
22
21
20

19
26

Reference:H0120-005006A Page:H004009

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (6/18) (#16107-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Spool 1 15001-
2 C1 Plug 1 15001-
3 C1 Orifice 1 15001-
4 C1 Seal 1 15001-
5 C1 O-ring 2 15001-
6 723-26-14650 Spring 1 15001-
7 723-26-16940 Flange 1 15001-
8 722-12-19120 O-ring 1 15001-
9 01252-60640 Bolt, Hexagon Socket Head 2 15001-
10 723-11-14350 Orifice 1 15001-
11 722-12-15160 Seal 1 15001-
12 07002-10823 O-ring 1 15001-
13 723-26-16350 Flange 1 15488-
14 723-11-19110 O-ring 1 15001-
15 723-26-16360 Sleeve 1 15488-
16 723-26-16371 Piston 1 15488-
17 723-26-16380 Spring 1 15488-
18 01252-60820 Bolt, Hexagon Socket Head 2 15001-
19 C1 Case 1 15001-
20 723-11-19110 O-ring 1 15001-
21 C1 Sleeve 1 15001-
22 723-26-16420 Retainer 1 15001-
23 C1 Piston 1 15001-
24 C1 Valve 1 15001-
25 723-26-16450 Spring 1 15001-
26 01252-60855 Bolt, Hexagon Socket Head 2 15001-
27 708-8E-16160 Plug 1 15001-
28 07002-11023 O-ring 1 15001-
Reference:H0120-005006A Page:H004009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 7-Valve (6/18) (#16107-)
Index Code Part Number Description Qty Serial No.
29 C1 Plug, Stocking 4 15001-
30 723-26-16460 Plug 2 15001-
31 07000-11007 O-ring 2 15001-
32 07001-01007 Ring, Back-up 2 15001-
33 07000-12120 O-ring 1 15001-
34 07000-12020 O-ring 1 15001-
35 723-26-15840 O-ring 1 15001-
36 07000-11008 O-ring 1 15001-
37 07000-11006 O-ring 1 15001-
38 723-26-16920 Case 1 15001-
39 722-12-19120 O-ring 1 15001-
40 01252-60640 Bolt, Hexagon Socket Head 2 15001-

Reference:H0120-005006A Page:H004009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011247

7 8
6

6
5
5 8 8
7
9
7
6
8
6
3

Reference:H0120-005007 Page:H004010

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (7/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Valve Body 1 15001-
2 C1 Valve Body 1 15001-
3 C1 Valve Body 1 15001-
4 C1 Block 1 16107-
C1 Valve Body 1 15001-16106
5 07000-12100 O-ring 4 15001-
6 723-11-19130 O-ring 7 15001-
7 723-11-19110 O-ring 3 15001-
8 07000-11006 O-ring 7 15001-
9 702-21-54260 O-ring 1 15001-

Reference:H0120-005007 Page:H004010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016301

24
22
23
16
13
14
12

24 1
22
23 23
16
13 20
15 25
12
4
6
8
7
25 2
21 7
23 8
17 6
9 5
11 23
10 22
24
3
18
19

Reference:H0120-005008 Page:H004011

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (8/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Spool 2 16107-
C1 Spool 2 15001-16106
2 C1 Spool 1 15001-
3 C1 Spool 1 15001-
4 C1 Plug 1 15001-
5 C1 Plug 1 15001-
6 C1 O-ring 2 15001-
7 723-11-17490 Poppet 2 15001-
8 723-11-17510 Spring 2 15001-
9 723-26-16470 Plug 1 15001-
10 07000-11005 O-ring 1 15001-
11 07001-01005 Ring, Back-up 1 15001-
12 723-11-17330 Retainer 3 15001-
13 723-11-17353 Retainer 3 15001-
14 723-11-17341 Spring 2 15001-
15 723-11-16991 Spring 1 15001-
16 723-11-17361 Bolt 3 15001-
17 723-26-16480 Retainer 1 15001-
18 723-26-16490 Spacer 1 15001-
19 723-26-14310 Spring 1 15001-
20 723-11-37220 Case 2 15001-
21 723-11-17410 Case, Spring 1 15001-
22 723-11-27880 Case 4 15001-
23 722-12-19120 O-ring 7 15001-
24 01252-60640 Bolt, Hexagon Socket Head 8 15001-
25 01252-60620 Bolt, Hexagon Socket Head 6 15001-

Reference:H0120-005008 Page:H004011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011250

11
12
3 9
1 10
12
11 11
12
3
9
2 10
12
11 11
12
3
4 6
5 7
8
12
15 11

14
13

17
16

Reference:H0120-005009 Page:H004012

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (9/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-27-50801 Valve Assembly, Control 1 15488-16106
723-27-50800 Valve Assembly, Control 1 15001-15487
C1 Body Group 1 15001-16106
1 C1 Valve 1 15001-@
2 C1 Valve 1 15001-@
3 C1 Orifice 3 15001-16106
4 C1 Valve 1 15001-@
5 723-11-15130 Spring 1 15001-@
6 C1 Valve 1 15001-@
7 C1 Piston 1 15001-@
8 723-11-16130 Spring 1 15001-@
9 C1 Valve Subassembly 2 15001-@
10 723-11-16230 Spring 2 15001-@
11 723-11-15110 Plug 6 15001-@
12 07002-11623 O-ring 6 15001-@
13 723-26-15230 Plug 2 15001-@
14 07002-12434 O-ring 2 15001-@
15 C1 Plug, Stocking 1 15001-@
16 706-8E-14191 Plug 1 15001-@
17 07002-11823 O-ring 1 15001-@

Reference:H0120-005009 Page:H004012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016302

14
15
4 12
1 13
15
14 14
15
4
12
2 13
15
14 14
15
3
5 7
6 8
9
15
14
10 16
17
11

18
17
16

20
19

Reference:H0120-005009A Page:H004013

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (9/18) (#16107-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Valve 1 15001-
2 C1 Valve 1 15001-
3 C1 Orifice 1 16107-
4 C1 Orifice 2 16107-
5 C1 Valve 1 15001-
6 723-11-15130 Spring 1 15001-
7 C1 Valve 1 15001-
8 C1 Piston 1 15001-
9 723-11-16130 Spring 1 15001-
10 702-21-53120 Filter 1 16107-
11 702-21-55420 O-ring 1 16107-
12 C1 Valve Subassembly 2 15001-
13 723-11-16230 Spring 2 15001-
14 723-11-15110 Plug 6 15001-
15 07002-11623 O-ring 6 15001-
16 723-26-15230 Plug 2 15001-
17 07002-12434 O-ring 2 15001-
18 C1 Plug, Stocking 1 15001-
19 706-8E-14191 Plug 1 15001-
20 07002-11823 O-ring 1 15001-

Reference:H0120-005009A Page:H004013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011251
10

6
8
5

Reference:H0120-005010 Page:H004014

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (10/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
1 700-85-11111 Bolt 4 15001-
2 01643-31032 Washer 4 15001-
3 723-11-29660 Bolt 4 15001-
4 01643-30823 Washer 4 15001-
5 723-26-16510 Bolt 6 15001-
6 01643-30623 Washer 6 15001-
7 01252-60650 Bolt, Hexagon Socket Head 4 15001-
8 01252-60635 Bolt, Hexagon Socket Head 2 15001-
9 01252-60616 Bolt, Hexagon Socket Head 2 15001-
10 04530-10815 Bolt, Eye 2 15001-

Reference:H0120-005010 Page:H004014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012846

1
4
3
2

Reference:H0120-005011 Page:H004015

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (11/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
1 723-20-63300 Valve, Relief 1 15001-
2 700-22-11410 O-ring 1 15001-
3 700-80-64220 Ring, Back-up 1 15001-
4 07002-12434 O-ring 1 15001-

Reference:H0120-005011 Page:H004015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011253

Reference:H0120-005012 Page:H004016

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (12/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
1 723-20-64200 Valve Assembly, Suction and Relief 1 15001-
2 07002-12034 O-ring 2 15001-

Reference:H0120-005012 Page:H004016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011254
2

Reference:H0120-005013 Page:H004017

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (13/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
1 723-20-80100 Valve Assembly, Suction 8 15001-
2 07002-12034 O-ring 1 15001-
3 723-10-80200 Valve Assembly, Suction 2 15001-
4 07002-12034 O-ring 1 15001-

Reference:H0120-005013 Page:H004017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011255

1
9
8
9
8

10
11
12
13
6
20
2 14
17
16
15
18
19
6
7
5
4 3

Reference:H0120-005014 Page:H004018

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (14/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
723-20-96200 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Plate 1 15001-
3 C1 Plug 1 15001-
4 01010-80620 Bolt 1 15001-
5 01643-30623 Washer 1 15001-
6 723-11-29490 O-ring 2 15001-
7 07000-11009 O-ring 1 15001-
8 07000-11006 O-ring 2 15001-
9 723-11-18150 O-ring 3 15001-
10 C1 Valve 1 15001-
11 C1 Orifice 1 15001-
12 C1 Seal 1 15001-
13 723-20-96140 Spring 1 15001-
723-26-00710 Valve Subassembly 1 15001-
14 C1 Piston 1 15001-
15 C1 Sleeve 1 15001-
16 07000-11010 O-ring 1 15001-
17 07001-01010 Ring, Back-up 1 15001-
18 07000-12012 O-ring 1 15001-
19 07001-02012 Ring, Back-up 1 15001-
20 723-11-19950 Spring 1 15001-

Reference:H0120-005014 Page:H004018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011256

7
8
3
2

1
7
8
6 8
5 7
11 4

12
9
11 10

Reference:H0120-005015 Page:H004019

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (15/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
723-11-02760 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Spool 1 15001-
3 723-11-27830 Spring 1 15001-
4 C1 Valve 1 15001-
5 723-11-18180 Spring 1 15001-
6 723-11-27840 Spacer 1 15001-
7 723-11-27850 Plug 3 15001-
8 07002-11023 O-ring 3 15001-
9 C1 Orifice 1 15001-
10 C1 Plug, Stocking 1 15001-
11 07000-11005 O-ring 3 15001-
12 07000-11007 O-ring 2 15001-

Reference:H0120-005015 Page:H004019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011257

4
5
3
2
1

6
8
7

Reference:H0120-005016 Page:H004020

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (16/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
723-11-02590 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Valve 1 15001-
3 723-11-18180 Spring 1 15001-
4 723-11-18190 Plug 1 15001-
5 07002-11023 O-ring 1 15001-
6 C1 Orifice 1 15001-
7 07000-11006 O-ring 1 15001-
8 07000-11008 O-ring 1 15001-

Reference:H0120-005016 Page:H004020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016303

14
15
12
6
13
5
4
3

11 2
10
8 1
9

10
11
13
12
15
14

Reference:H0120-005017 Page:H004021

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (17/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
723-21-07501 Valve Subassembly 1 16107-
723-21-07500 Valve Subassembly 1 15001-16106
1 C1 Block, Valve 1 15001-
2 07000-12120 O-ring 1 15001-
3 07000-12020 O-ring 1 15001-
4 723-26-15830 O-ring 1 15001-
5 723-26-15840 O-ring 1 15001-
6 07000-11008 O-ring 2 15001-
7 C1 Spool 1 15001-
8 C1 Plug 1 15001-
9 C1 O-ring 1 15001-
10 723-26-15121 Retainer 2 15001-
11 709-26-11450 Spring 2 15001-
12 723-26-15110 Case 2 15001-
13 575-41-17420 O-ring 2 15001-
14 01252-60630 Bolt, Hexagon Socket Head 4 15001-
15 01641-20608 Washer 4 15001-

Reference:H0120-005017 Page:H004021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011260

5
6
1

2
4
11 3
12 6
5

9
10
8
7 12
11

Reference:H0120-005018 Page:H004022

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (18/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
723-21-07501 Valve Subassembly 1 16107-
723-21-07500 Valve Subassembly 1 15001-16106
1 C1 Valve 1 15001-
2 C1 Valve 1 15001-
3 C1 Piston 1 15001-
4 723-26-14140 Spring 1 15001-
5 723-26-15230 Plug 2 15001-
6 07002-12434 O-ring 2 15001-
7 723-26-15220 Plug 2 15001-
8 07002-11223 O-ring 2 15001-
9 C1 Valve 2 15001-
10 723-26-14150 Spring 2 15001-
11 723-20-80100 Valve Assembly, Suction 2 15001-
12 07002-12034 O-ring 1 15001-

Reference:H0120-005018 Page:H004022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001469
12

13
15

14

11

6
7 1
5
4
2
3 10

9
4
8

Reference:H0120-005019 Page:H004023

PC78US-8 S/N 15001-UP


Control Valve, Mounting (#15001-15654)
Index Code Part Number Description Qty Serial No.
1 21W-62-52111 Bracket 1 15001-@
2 21W-62-11620 Spacer 4 15001-@
3 07000-13025 O-ring 4 15001-@
4 203-62-42770 Cushion 8 15001-@
5 566-35-42430 Plate 4 15001-@
6 01010-81245 Bolt 4 15001-@
7 01643-31232 Washer 4 15001-@
8 01010-81430 Bolt 4 15001-@
9 01643-31445 Washer, Flat 4 15001-@
10 21W-62-51731 Seal 1 15001-@
11 21W-62-51580 Bracket 1 15001-15654
12 01010-80845 Bolt 2 15001-@
13 01643-30823 Washer 2 15001-@
14 21W-62-52390 Sheet 1 15001-@
15 201-54-35890 Collar 2 15001-@

Reference:H0120-005019 Page:H004023
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA004084
12

13
15

14

11

6
7 1
5
4
2
3 10

9
4
8

Reference:H0120-005019A Page:H004024

PC78US-8 S/N 15001-UP


Control Valve, Mounting (#15655-)
Index Code Part Number Description Qty Serial No.
1 21W-62-52111 Bracket 1 15001-
2 21W-62-11620 Spacer 4 15001-
3 07000-13025 O-ring 4 15001-
4 203-62-42770 Cushion 8 15001-
5 566-35-42430 Plate 4 15001-
6 01010-81245 Bolt 4 15001-
7 01643-31232 Washer 4 15001-
8 01010-81430 Bolt 4 15001-
9 01643-31445 Washer, Flat 4 15001-
10 21W-62-51731 Seal 1 15001-
11 21W-62-51581 Bracket 1 15655-
12 01010-80845 Bolt 2 15001-
13 01643-30823 Washer 2 15001-
14 21W-62-52390 Sheet 1 15001-
15 201-54-35890 Collar 2 15001-

Reference:H0120-005019A Page:H004024
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, With 1-Additional Actuator Piping, Without Blade
FIG. Name FIG. No.
Control Valve, 7-Valve (1/18) (#15001-16106) H0120-004001
Control Valve, 7-Valve (1/18) (#16107-) H0120-004001A
Control Valve, 7-Valve (2/18) (#15001-16106) H0120-004002
Control Valve, 7-Valve (2/18) (#16107-) H0120-004002A
Control Valve, 7-Valve (3/18) H0120-004003
Control Valve, 7-Valve (4/18) H0120-004004
Control Valve, 7-Valve (5/18) H0120-004005
Control Valve, 7-Valve (6/18) (#15001-15487) H0120-004006
Control Valve, 7-Valve (6/18) (#15488-) H0120-004006A
Control Valve, 7-Valve (7/18) H0120-004007
Control Valve, 7-Valve (8/18) H0120-004008
Control Valve, 7-Valve (9/18) (#15001-16106) H0120-004009
Control Valve, 7-Valve (9/18) (#16107-) H0120-004009A
Control Valve, 7-Valve (10/18) H0120-004010
Control Valve, 7-Valve (11/18) H0120-004011
Control Valve, 7-Valve (12/18) H0120-004012
Control Valve, 7-Valve (13/18) H0120-004013
Control Valve, 7-Valve (14/18) H0120-004014
Control Valve, 7-Valve (15/18) H0120-004015
Control Valve, 7-Valve (16/18) H0120-004016
Control Valve, 7-Valve (17/18) H0120-004017
Control Valve, 7-Valve (18/18) H0120-004018
Control Valve, Mounting H0120-004019

Reference:X22-1039170 Page:H005000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011239
2
3 1

10 5
9 4
7
8
6

Reference:H0120-004001 Page:H005001

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (1/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-27-50801 Valve Assembly, Control 1 15488-16106
723-27-50800 Valve Assembly, Control 1 15001-15487
C1 Cover Group 1 15001-16106
1 723-26-21741 Cover 1 15001-16106
2 708-8E-16160 Plug 1 15001-@
3 07002-11023 O-ring 1 15001-@
4 702-21-55620 Plug 1 15001-@
5 07002-11423 O-ring 1 15001-@
6 723-26-16630 Plug 1 15001-16106
7 07000-11009 O-ring 1 15001-16106
8 07001-01009 Ring, Back-up 1 15001-16106
9 07000-11007 O-ring 1 15001-16106
10 07001-01007 Ring, Back-up 1 15001-16106

Reference:H0120-004001 Page:H005001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016297
2
3
1

11 5
9 4
12
13
10 7
6
8
16
15
14

Reference:H0120-004001A Page:H005002

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (1/18) (#16107-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Cover Group 1 16107-
1 C1 Cover 1 16107-
2 708-8E-16160 Plug 1 15001-
3 07002-11023 O-ring 1 15001-
4 702-21-55620 Plug 1 15001-
5 07002-11423 O-ring 1 15001-
6 702-21-53120 Filter 1 16107-
7 702-21-55420 O-ring 1 16107-
8 C1 Seat 1 16107-
9 723-11-38620 Plug 1 16107-
10 723-26-16990 Plug 1 16107-
11 07002-11223 O-ring 1 16107-
12 07000-11003 O-ring 2 16107-
13 07001-01003 Ring, Back-up 1 16107-
14 723-11-14390 Filter 1 16107-
15 07002-12434 O-ring 1 16107-
16 723-11-19130 O-ring 1 16107-

Reference:H0120-004001A Page:H005002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016298

7
4
6
23 5
24 8
20
17
1
12
7 14
4 9
6
23 17
5 8 21
24
18 24
17 23
2
12
7 14
4 10
6 15
23 16
5 8 14
24 13
22 17
17 21
3 24
12
14 23
11
15
16
14
13
17 28
19 31 29

27
30 26
32
25

Reference:H0120-004002 Page:H005003

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (2/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-27-50801 Valve Assembly, Control 1 15488-16106
723-27-50800 Valve Assembly, Control 1 15001-15487
C1 Body Group 1 15001-16106
1 C1 Block, Valve 1 15001-@
2 C1 Block, Valve 1 15001-@
3 C1 Block, Valve 1 15001-@
4 07000-12120 O-ring 3 15001-@
5 07000-12020 O-ring 3 15001-@
6 723-26-15830 O-ring 3 15001-@
7 723-26-15840 O-ring 3 15001-@
8 07000-11008 O-ring 6 15001-@
9 C1 Spool 1 15001-@
10 C1 Spool 1 15001-@
11 C1 Spool 1 15001-@
12 C1 Plug 3 15001-@
13 C1 Plug 2 15001-@
14 C1 O-ring 5 15001-@
15 C1 Valve 2 15001-@
16 C1 Spring 2 15001-@
17 723-26-15121 Retainer 6 15001-@
18 709-26-11450 Spring 1 15001-@
19 723-26-14490 Spring 1 15001-@
20 723-26-16621 Spring 1 15001-@
21 723-26-14510 Spring 2 15001-@
22 723-26-16621 Spring 1 15001-@
23 723-26-15110 Case 5 15001-@
24 575-41-17420 O-ring 5 15001-16106
723-20-91202 Case Subassembly 1 15001-16106
25 C1 Case 1 15001-16106
26 C1 Seat 1 15001-16106
Reference:H0120-004002 Page:H005003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 7-Valve (2/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
27 C1 Ball 1 15001-16106
28 C1 Plug 1 15001-16106
29 07002-10823 O-ring 1 15001-16106
30 575-41-17420 O-ring 1 15001-16106
31 07000-11006 O-ring 1 15001-16106
32 702-21-54260 O-ring 1 15001-16106

Reference:H0120-004002 Page:H005003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016299

7
4
6
23
5 8
24
20
17
1
12
7 14
4 9
6
23 17
5 8
24 21
18 24
17 23
2
12
7 14
4 10
6 15
23 16
5 14
24 8 13
22 17
17 21
3 24
12 23
14
11
15
16
14
13
17
19

24

25
26

Reference:H0120-004002A Page:H005004

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (2/18) (#16107-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Block, Valve 1 15001-
2 C1 Block, Valve 1 15001-
3 C1 Block, Valve 1 15001-
4 07000-12120 O-ring 3 15001-
5 07000-12020 O-ring 3 15001-
6 723-26-15830 O-ring 3 15001-
7 723-26-15840 O-ring 3 15001-
8 07000-11008 O-ring 6 15001-
9 C1 Spool 1 15001-
10 C1 Spool 1 15001-
11 C1 Spool 1 15001-
12 C1 Plug 3 15001-
13 C1 Plug 2 15001-
14 C1 O-ring 5 15001-
15 C1 Valve 2 15001-
16 C1 Spring 2 15001-
17 723-26-15121 Retainer 6 15001-
18 709-26-11450 Spring 1 15001-
19 723-26-14490 Spring 1 15001-
20 723-26-16621 Spring 1 15001-
21 723-26-14510 Spring 2 15001-
22 723-26-16621 Spring 1 15001-
23 723-26-15110 Case 5 15001-
24 575-41-17420 O-ring 6 16107-
25 702-21-54260 O-ring 1 16107-
26 723-26-17110 Case 1 16107-

Reference:H0120-004002A Page:H005004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011243

15
17
4
12

2
3 7
10
13
15 17
17 16
5

8
10
15 14
17
17 15
6
12

3
9 2
11
13
17
16

3
1

Reference:H0120-004003 Page:H005005

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (3/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 01252-60635 Bolt, Hexagon Socket Head 3 15001-
2 01252-60630 Bolt, Hexagon Socket Head 10 15001-
3 01641-20608 Washer 13 15001-
4 C1 Valve 1 15001-
5 C1 Valve 1 15001-
6 C1 Valve 1 15001-
7 C1 Valve 1 15001-
8 C1 Valve 1 15001-
9 C1 Valve 1 15001-
10 C1 Piston 2 15001-
11 C1 Piston 1 15001-
12 723-26-14220 Spring 2 15001-
13 723-26-14240 Spring 2 15001-
14 723-26-14140 Spring 1 15001-
15 723-26-15230 Plug 4 15001-
16 723-26-15370 Plug 2 15001-
17 07002-12434 O-ring 6 15001-

Reference:H0120-004003 Page:H005005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011244

3
4
2
1

11
10
9
8

3
4
6
7
5

Reference:H0120-004004 Page:H005006

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (4/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 723-26-15220 Plug 4 15001-
2 07002-11223 O-ring 4 15001-
3 C1 Valve 5 15001-
4 723-26-14150 Spring 5 15001-
5 723-26-16230 Plug 1 15001-
6 07000-11008 O-ring 1 15001-
7 07001-01008 Ring, Back-up 1 15001-
8 723-26-16240 Seat 1 15001-
9 C1 Valve 1 15001-
10 723-26-16260 Spring 1 15001-
11 723-26-16270 Retainer 1 15001-

Reference:H0120-004004 Page:H005006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016300

6
7
14
12
1

4
5
3 15
2
13
9
8
11
10

Reference:H0120-004005 Page:H005007

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (5/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15488-16106
C1 Body Group 1 15001-15487
1 C1 Valve Body 1 16107-
C1 Valve Body 1 15001-16106
2 723-26-17180 Plug 2 16107-
723-11-38260 Plug 2 15001-16106
3 07002-11823 O-ring 2 15001-
4 C1 Valve 2 16107-
C1 Valve 2 15001-16106
5 723-26-17170 Spring 2 16107-
722-10-91130 Spring 2 15001-16106
6 723-11-26170 Plug 2 15001-
7 07002-11623 O-ring 2 15001-
8 723-26-16890 Plug 2 15001-
9 07002-11823 O-ring 2 15001-
10 708-8E-16160 Plug 2 15001-
11 07002-11023 O-ring 2 15001-
12 C1 Valve 2 16107-
C1 Valve 2 15001-16106
13 C1 Retainer 2 16107-
C1 Retainer 2 15001-16106
14 C1 Orifice 2 16107-
15 723-26-14640 Spring 2 15001-

Reference:H0120-004005 Page:H005007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011246

32
33
30

31
27
24 29 26
25
9 28
7 8 26 11
6 12
2 10
5
1
4
14 5
3 35
13 36
15 37
28 26
29
27 21
34 20
22
19
18
17

16
23

Reference:H0120-004006 Page:H005008

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (6/18) (#15001-15487)
Index Code Part Number Description Qty Serial No.
723-27-50800 Valve Assembly, Control 1 15001-15487
C1 Body Group 1 15001-15487
1 C1 Spool 1 15001-@
2 C1 Plug 1 15001-@
3 C1 Orifice 1 15001-@
4 C1 Seal 1 15001-@
5 C1 O-ring 2 15001-@
6 723-26-14650 Spring 1 15001-@
7 723-26-16940 Flange 1 15001-@
8 722-12-19120 O-ring 1 15001-@
9 01252-60640 Bolt, Hexagon Socket Head 2 15001-@
10 723-11-14350 Orifice 1 15001-@
11 722-12-15160 Seal 1 15001-@
12 07002-10823 O-ring 1 15001-@
13 723-26-16650 Flange 1 15001-15487
14 723-11-19110 O-ring 1 15001-@
15 01252-60820 Bolt, Hexagon Socket Head 2 15001-@
16 C1 Case 1 15001-@
17 723-11-19110 O-ring 1 15001-@
18 C1 Sleeve 1 15001-@
19 723-26-16420 Retainer 1 15001-@
20 C1 Piston 1 15001-@
21 C1 Valve 1 15001-@
22 723-26-16450 Spring 1 15001-@
23 01252-60855 Bolt, Hexagon Socket Head 2 15001-@
24 708-8E-16160 Plug 1 15001-@
25 07002-11023 O-ring 1 15001-@
26 C1 Plug, Stocking 4 15001-@
27 723-26-16460 Plug 2 15001-@
28 07000-11007 O-ring 2 15001-@
Reference:H0120-004006 Page:H005008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 7-Valve (6/18) (#15001-15487)
Index Code Part Number Description Qty Serial No.
29 07001-01007 Ring, Back-up 2 15001-@
30 07000-12120 O-ring 1 15001-@
31 07000-12020 O-ring 1 15001-@
32 723-26-15840 O-ring 1 15001-@
33 07000-11008 O-ring 1 15001-@
34 07000-11006 O-ring 1 15001-@
35 723-26-16920 Case 1 15001-@
36 722-12-19120 O-ring 1 15001-@
37 01252-60640 Bolt, Hexagon Socket Head 2 15001-@

Reference:H0120-004006 Page:H005008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY014090

35
36
33

34
30
27 32 29
28
9 31
7 8 29
11
6 12
2 10
5
1
4
15 5
3 38
16 39 40
31 29 17
14
32 13
30 18
24
37 23
25
22
21
20

19
26

Reference:H0120-004006A Page:H005009

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (6/18) (#15488-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15488-16106
1 C1 Spool 1 15001-
2 C1 Plug 1 15001-
3 C1 Orifice 1 15001-
4 C1 Seal 1 15001-
5 C1 O-ring 2 15001-
6 723-26-14650 Spring 1 15001-
7 723-26-16940 Flange 1 15001-
8 722-12-19120 O-ring 1 15001-
9 01252-60640 Bolt, Hexagon Socket Head 2 15001-
10 723-11-14350 Orifice 1 15001-
11 722-12-15160 Seal 1 15001-
12 07002-10823 O-ring 1 15001-
13 723-26-16350 Flange 1 15488-
14 723-11-19110 O-ring 1 15001-
15 723-26-16360 Sleeve 1 15488-
16 723-26-16371 Piston 1 15488-
17 723-26-16380 Spring 1 15488-
18 01252-60820 Bolt, Hexagon Socket Head 2 15001-
19 C1 Case 1 15001-
20 723-11-19110 O-ring 1 15001-
21 C1 Sleeve 1 15001-
22 723-26-16420 Retainer 1 15001-
23 C1 Piston 1 15001-
24 C1 Valve 1 15001-
25 723-26-16450 Spring 1 15001-
26 01252-60855 Bolt, Hexagon Socket Head 2 15001-
27 708-8E-16160 Plug 1 15001-
Reference:H0120-004006A Page:H005009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 7-Valve (6/18) (#15488-)
Index Code Part Number Description Qty Serial No.
28 07002-11023 O-ring 1 15001-
29 C1 Plug, Stocking 4 15001-
30 723-26-16460 Plug 2 15001-
31 07000-11007 O-ring 2 15001-
32 07001-01007 Ring, Back-up 2 15001-
33 07000-12120 O-ring 1 15001-
34 07000-12020 O-ring 1 15001-
35 723-26-15840 O-ring 1 15001-
36 07000-11008 O-ring 1 15001-
37 07000-11006 O-ring 1 15001-
38 723-26-16920 Case 1 15001-
39 722-12-19120 O-ring 1 15001-
40 01252-60640 Bolt, Hexagon Socket Head 2 15001-

Reference:H0120-004006A Page:H005009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011247

7 8
6

6
5
5 8 8
7
9
7
6
8
6
3

Reference:H0120-004007 Page:H005010

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (7/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Valve Body 1 15001-
2 C1 Valve Body 1 15001-
3 C1 Valve Body 1 15001-
4 C1 Block 1 16107-
C1 Valve Body 1 15001-16106
5 07000-12100 O-ring 4 15001-
6 723-11-19130 O-ring 7 15001-
7 723-11-19110 O-ring 3 15001-
8 07000-11006 O-ring 7 15001-
9 702-21-54260 O-ring 1 15001-

Reference:H0120-004007 Page:H005010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016301

24
22
23
16
13
14
12

24 1
22
23 23
16
13 20
15 25
12
4
6
8
7
25 2
21 7
23 8
17 6
9 5
11 23
10 22
24
3
18
19

Reference:H0120-004008 Page:H005011

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (8/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Spool 2 16107-
C1 Spool 2 15001-16106
2 C1 Spool 1 15001-
3 C1 Spool 1 15001-
4 C1 Plug 1 15001-
5 C1 Plug 1 15001-
6 C1 O-ring 2 15001-
7 723-11-17490 Poppet 2 15001-
8 723-11-17510 Spring 2 15001-
9 723-26-16470 Plug 1 15001-
10 07000-11005 O-ring 1 15001-
11 07001-01005 Ring, Back-up 1 15001-
12 723-11-17330 Retainer 3 15001-
13 723-11-17353 Retainer 3 15001-
14 723-11-17341 Spring 2 15001-
15 723-11-16991 Spring 1 15001-
16 723-11-17361 Bolt 3 15001-
17 723-26-16480 Retainer 1 15001-
18 723-26-16490 Spacer 1 15001-
19 723-26-14310 Spring 1 15001-
20 723-11-37220 Case 2 15001-
21 723-11-17410 Case, Spring 1 15001-
22 723-11-27880 Case 4 15001-
23 722-12-19120 O-ring 7 15001-
24 01252-60640 Bolt, Hexagon Socket Head 8 15001-
25 01252-60620 Bolt, Hexagon Socket Head 6 15001-

Reference:H0120-004008 Page:H005011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011250

11
12
3 9
1 10
12
11 11
12
3
9
2 10
12
11 11
12
3
4 6
5 7
8
12
15 11

14
13

17
16

Reference:H0120-004009 Page:H005012

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (9/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-27-50801 Valve Assembly, Control 1 15488-16106
723-27-50800 Valve Assembly, Control 1 15001-15487
C1 Body Group 1 15001-16106
1 C1 Valve 1 15001-@
2 C1 Valve 1 15001-@
3 C1 Orifice 3 15001-16106
4 C1 Valve 1 15001-@
5 723-11-15130 Spring 1 15001-@
6 C1 Valve 1 15001-@
7 C1 Piston 1 15001-@
8 723-11-16130 Spring 1 15001-@
9 C1 Valve Subassembly 2 15001-@
10 723-11-16230 Spring 2 15001-@
11 723-11-15110 Plug 6 15001-@
12 07002-11623 O-ring 6 15001-@
13 723-26-15230 Plug 2 15001-@
14 07002-12434 O-ring 2 15001-@
15 C1 Plug, Stocking 1 15001-@
16 706-8E-14191 Plug 1 15001-@
17 07002-11823 O-ring 1 15001-@

Reference:H0120-004009 Page:H005012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016302

14
15
4 12
1 13
15
14 14
15
4
12
2 13
15
14 14
15
3
5 7
6 8
9
15
14
10 16
17
11

18
17
16

20
19

Reference:H0120-004009A Page:H005013

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (9/18) (#16107-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Valve 1 15001-
2 C1 Valve 1 15001-
3 C1 Orifice 1 16107-
4 C1 Orifice 2 16107-
5 C1 Valve 1 15001-
6 723-11-15130 Spring 1 15001-
7 C1 Valve 1 15001-
8 C1 Piston 1 15001-
9 723-11-16130 Spring 1 15001-
10 702-21-53120 Filter 1 16107-
11 702-21-55420 O-ring 1 16107-
12 C1 Valve Subassembly 2 15001-
13 723-11-16230 Spring 2 15001-
14 723-11-15110 Plug 6 15001-
15 07002-11623 O-ring 6 15001-
16 723-26-15230 Plug 2 15001-
17 07002-12434 O-ring 2 15001-
18 C1 Plug, Stocking 1 15001-
19 706-8E-14191 Plug 1 15001-
20 07002-11823 O-ring 1 15001-

Reference:H0120-004009A Page:H005013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011251
10

6
8
5

Reference:H0120-004010 Page:H005014

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (10/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
1 700-85-11111 Bolt 4 15001-
2 01643-31032 Washer 4 15001-
3 723-11-29660 Bolt 4 15001-
4 01643-30823 Washer 4 15001-
5 723-26-16510 Bolt 6 15001-
6 01643-30623 Washer 6 15001-
7 01252-60650 Bolt, Hexagon Socket Head 4 15001-
8 01252-60635 Bolt, Hexagon Socket Head 2 15001-
9 01252-60616 Bolt, Hexagon Socket Head 2 15001-
10 04530-10815 Bolt, Eye 2 15001-

Reference:H0120-004010 Page:H005014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012846

1
4
3
2

Reference:H0120-004011 Page:H005015

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (11/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
1 723-20-63300 Valve, Relief 1 15001-
2 700-22-11410 O-ring 1 15001-
3 700-80-64220 Ring, Back-up 1 15001-
4 07002-12434 O-ring 1 15001-

Reference:H0120-004011 Page:H005015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011253

Reference:H0120-004012 Page:H005016

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (12/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
1 723-20-64200 Valve Assembly, Suction and Relief 1 15001-
2 07002-12034 O-ring 2 15001-

Reference:H0120-004012 Page:H005016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011254
2

Reference:H0120-004013 Page:H005017

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (13/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
1 723-20-80100 Valve Assembly, Suction 8 15001-
2 07002-12034 O-ring 1 15001-
3 723-10-80200 Valve Assembly, Suction 2 15001-
4 07002-12034 O-ring 1 15001-

Reference:H0120-004013 Page:H005017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011255

1
9
8
9
8

10
11
12
13
6
20
2 14
17
16
15
18
19
6
7
5
4 3

Reference:H0120-004014 Page:H005018

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (14/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
723-20-96200 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Plate 1 15001-
3 C1 Plug 1 15001-
4 01010-80620 Bolt 1 15001-
5 01643-30623 Washer 1 15001-
6 723-11-29490 O-ring 2 15001-
7 07000-11009 O-ring 1 15001-
8 07000-11006 O-ring 2 15001-
9 723-11-18150 O-ring 3 15001-
10 C1 Valve 1 15001-
11 C1 Orifice 1 15001-
12 C1 Seal 1 15001-
13 723-20-96140 Spring 1 15001-
723-26-00710 Valve Subassembly 1 15001-
14 C1 Piston 1 15001-
15 C1 Sleeve 1 15001-
16 07000-11010 O-ring 1 15001-
17 07001-01010 Ring, Back-up 1 15001-
18 07000-12012 O-ring 1 15001-
19 07001-02012 Ring, Back-up 1 15001-
20 723-11-19950 Spring 1 15001-

Reference:H0120-004014 Page:H005018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011256

7
8
3
2

1
7
8
6 8
5 7
11 4

12
9
11 10

Reference:H0120-004015 Page:H005019

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (15/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
723-11-02760 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Spool 1 15001-
3 723-11-27830 Spring 1 15001-
4 C1 Valve 1 15001-
5 723-11-18180 Spring 1 15001-
6 723-11-27840 Spacer 1 15001-
7 723-11-27850 Plug 3 15001-
8 07002-11023 O-ring 3 15001-
9 C1 Orifice 1 15001-
10 C1 Plug, Stocking 1 15001-
11 07000-11005 O-ring 3 15001-
12 07000-11007 O-ring 2 15001-

Reference:H0120-004015 Page:H005019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011257

4
5
3
2
1

6
8
7

Reference:H0120-004016 Page:H005020

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (16/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
723-11-02590 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Valve 1 15001-
3 723-11-18180 Spring 1 15001-
4 723-11-18190 Plug 1 15001-
5 07002-11023 O-ring 1 15001-
6 C1 Orifice 1 15001-
7 07000-11006 O-ring 1 15001-
8 07000-11008 O-ring 1 15001-

Reference:H0120-004016 Page:H005020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016303

14
15
12
6
13
5
4
3

11 2
10
8 1
9

10
11
13
12
15
14

Reference:H0120-004017 Page:H005021

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (17/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
723-21-07501 Valve Subassembly 1 16107-
723-21-07500 Valve Subassembly 1 15001-16106
1 C1 Block, Valve 1 15001-
2 07000-12120 O-ring 1 15001-
3 07000-12020 O-ring 1 15001-
4 723-26-15830 O-ring 1 15001-
5 723-26-15840 O-ring 1 15001-
6 07000-11008 O-ring 2 15001-
7 C1 Spool 1 15001-
8 C1 Plug 1 15001-
9 C1 O-ring 1 15001-
10 723-26-15121 Retainer 2 15001-
11 709-26-11450 Spring 2 15001-
12 723-26-15110 Case 2 15001-
13 575-41-17420 O-ring 2 15001-
14 01252-60630 Bolt, Hexagon Socket Head 4 15001-
15 01641-20608 Washer 4 15001-

Reference:H0120-004017 Page:H005021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011260

5
6
1

2
4
11 3
12 6
5

9
10
8
7 12
11

Reference:H0120-004018 Page:H005022

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (18/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50802 Valve, Control 1 16107-
723-21-07501 Valve Subassembly 1 16107-
723-21-07500 Valve Subassembly 1 15001-16106
1 C1 Valve 1 15001-
2 C1 Valve 1 15001-
3 C1 Piston 1 15001-
4 723-26-14140 Spring 1 15001-
5 723-26-15230 Plug 2 15001-
6 07002-12434 O-ring 2 15001-
7 723-26-15220 Plug 2 15001-
8 07002-11223 O-ring 2 15001-
9 C1 Valve 2 15001-
10 723-26-14150 Spring 2 15001-
11 723-20-80100 Valve Assembly, Suction 2 15001-
12 07002-12034 O-ring 1 15001-

Reference:H0120-004018 Page:H005022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001469
12

13
15

14

11

6
7 1
5
4
2
3 10

9
4
8

Reference:H0120-004019 Page:H005023

PC78US-8 S/N 15001-UP


Control Valve, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-52111 Bracket 1 15001-
2 21W-62-11620 Spacer 4 15001-
3 07000-13025 O-ring 4 15001-
4 203-62-42770 Cushion 8 15001-
5 566-35-42430 Plate 4 15001-
6 01010-81245 Bolt 4 15001-
7 01643-31232 Washer 4 15001-
8 01010-81430 Bolt 4 15001-
9 01643-31445 Washer, Flat 4 15001-
10 21W-62-51731 Seal 1 15001-
11 21W-62-51580 Bracket 1 15001-
12 01010-80845 Bolt 2 15001-
13 01643-30823 Washer 2 15001-
14 21W-62-52390 Sheet 1 15001-
15 201-54-35890 Collar 2 15001-

Reference:H0120-004019 Page:H005023
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, With Blade
FIG. Name FIG. No.
Control Valve, 7-Valve (1/18) (#15001-16106) H0120-003001
Control Valve, 7-Valve (1/18) (#16107-) H0120-003001A
Control Valve, 7-Valve (2/18) (#15001-16106) H0120-003002
Control Valve, 7-Valve (2/18) (#16107-) H0120-003002A
Control Valve, 7-Valve (3/18) H0120-003003
Control Valve, 7-Valve (4/18) H0120-003004
Control Valve, 7-Valve (5/18) H0120-003005
Control Valve, 7-Valve (6/18) H0120-003006
Control Valve, 7-Valve (7/18) H0120-003007
Control Valve, 7-Valve (8/18) H0120-003008
Control Valve, 7-Valve (9/18) (#15001-16106) H0120-003009
Control Valve, 7-Valve (9/18) (#16107-) H0120-003009A
Control Valve, 7-Valve (10/18) H0120-003010
Control Valve, 7-Valve (11/18) H0120-003011
Control Valve, 7-Valve (12/18) H0120-003012
Control Valve, 7-Valve (13/18) H0120-003013
Control Valve, 7-Valve (14/18) H0120-003014
Control Valve, 7-Valve (15/18) H0120-003015
Control Valve, 7-Valve (16/18) H0120-003016
Control Valve, 7-Valve (17/18) H0120-003017
Control Valve, 7-Valve (18/18) H0120-003018
Control Valve, Mounting H0120-003019

Reference:X22-1039160 Page:H006000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
00010532
2
3 1

5
10 4
9
7
8
6

Reference:H0120-003001 Page:H006001

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (1/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-27-50700 Valve Assembly, Control 1 15001-16106
C1 Cover Group 1 15001-16106
1 723-26-21741 Cover 1 15001-16106
2 708-8E-16160 Plug 1 15001-@
3 07002-11023 O-ring 1 15001-@
4 702-21-55620 Plug 1 15001-@
5 07002-11423 O-ring 1 15001-@
6 723-26-16630 Plug 1 15001-16106
7 07000-11009 O-ring 1 15001-16106
8 07001-01009 Ring, Back-up 1 15001-16106
9 07000-11007 O-ring 1 15001-16106
10 07001-01007 Ring, Back-up 1 15001-16106

Reference:H0120-003001 Page:H006001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016279
2
3
1

11 5
9 4
12
13
10 7
6
8
16
15
14

Reference:H0120-003001A Page:H006002

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (1/18) (#16107-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
C1 Cover Group 1 16107-
1 C1 Cover 1 16107-
2 708-8E-16160 Plug 1 15001-
3 07002-11023 O-ring 1 15001-
4 702-21-55620 Plug 1 15001-
5 07002-11423 O-ring 1 15001-
6 702-21-53120 Filter 1 16107-
7 702-21-55420 O-ring 1 16107-
8 C1 Seat 1 16107-
9 723-11-38620 Plug 1 16107-
10 723-26-16990 Plug 1 16107-
11 07002-11223 O-ring 1 16107-
12 07000-11003 O-ring 2 16107-
13 07001-01003 Ring, Back-up 1 16107-
14 723-11-14390 Filter 1 16107-
15 07002-12434 O-ring 1 16107-
16 723-11-19130 O-ring 1 16107-

Reference:H0120-003001A Page:H006002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016280

7
4
6
23 5
24 8
20
17
1
12
7 14
4 9
6
23 17
5 8 21
24
18 24
17 23
2
12
7 14
4 10
6 15
23 16
5 8 14
24 13
22 17
17 21
3 24
12
14 23
11
15
16
14
13
17 28
19 31 29

27
30 26
32
25

Reference:H0120-003002 Page:H006003

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (2/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-27-50700 Valve Assembly, Control 1 15001-16106
C1 Body Group 1 15001-16106
1 C1 Block, Valve 1 15001-@
2 C1 Block, Valve 1 15001-@
3 C1 Block, Valve 1 15001-@
4 07000-12120 O-ring 3 15001-@
5 07000-12020 O-ring 3 15001-@
6 723-26-15830 O-ring 3 15001-@
7 723-26-15840 O-ring 3 15001-@
8 07000-11008 O-ring 6 15001-@
9 C1 Spool 1 15001-@
10 C1 Spool 1 15001-@
11 C1 Spool 1 15001-@
12 C1 Plug 3 15001-@
13 C1 Plug 2 15001-@
14 C1 O-ring 5 15001-@
15 C1 Valve 2 15001-@
16 C1 Spring 2 15001-@
17 723-26-15121 Retainer 6 15001-@
18 709-26-11450 Spring 1 15001-@
19 723-26-14490 Spring 1 15001-@
20 723-26-16621 Spring 1 15001-@
21 723-26-14510 Spring 2 15001-@
22 723-26-16621 Spring 1 15001-@
23 723-26-15110 Case 5 15001-@
24 575-41-17420 O-ring 5 15001-16106
723-20-91202 Case Subassembly 1 15001-16106
25 C1 Case 1 15001-16106
26 C1 Seat 1 15001-16106
27 C1 Ball 1 15001-16106
Reference:H0120-003002 Page:H006003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 7-Valve (2/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
28 C1 Plug 1 15001-16106
29 07002-10823 O-ring 1 15001-16106
30 575-41-17420 O-ring 1 15001-16106
31 07000-11006 O-ring 1 15001-16106
32 702-21-54260 O-ring 1 15001-16106

Reference:H0120-003002 Page:H006003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016281

7
4
6
23 5
24 8
20
17
1
12
7 14
4 9
6
23 17
5 8 21
24
18 24
17 23
2
12
7 14
4 10
6 15
23 16
5 14
24 8 13
22 17
17 21
3 24
12 23
14
11
15
16
14
13
17
19

24

25
26

Reference:H0120-003002A Page:H006004

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (2/18) (#16107-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Block, Valve 1 15001-
2 C1 Block, Valve 1 15001-
3 C1 Block, Valve 1 15001-
4 07000-12120 O-ring 3 15001-
5 07000-12020 O-ring 3 15001-
6 723-26-15830 O-ring 3 15001-
7 723-26-15840 O-ring 3 15001-
8 07000-11008 O-ring 6 15001-
9 C1 Spool 1 15001-
10 C1 Spool 1 15001-
11 C1 Spool 1 15001-
12 C1 Plug 3 15001-
13 C1 Plug 2 15001-
14 C1 O-ring 5 15001-
15 C1 Valve 2 15001-
16 C1 Spring 2 15001-
17 723-26-15121 Retainer 6 15001-
18 709-26-11450 Spring 1 15001-
19 723-26-14490 Spring 1 15001-
20 723-26-16621 Spring 1 15001-
21 723-26-14510 Spring 2 15001-
22 723-26-16621 Spring 1 15001-
23 723-26-15110 Case 5 15001-
24 575-41-17420 O-ring 6 16107-
25 702-21-54260 O-ring 1 16107-
26 723-26-17110 Case 1 16107-

Reference:H0120-003002A Page:H006004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011344

15
17
4
12

2
3 7
10
13
15 17
17 16
5

8
10
15 14
17
17 15
6
12

3
9 2
11
13
17
16

3
1

Reference:H0120-003003 Page:H006005

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (3/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 01252-60635 Bolt, Hexagon Socket Head 3 15001-
2 01252-60630 Bolt, Hexagon Socket Head 10 15001-
3 01641-20608 Washer 13 15001-
4 C1 Valve 1 15001-
5 C1 Valve 1 15001-
6 C1 Valve 1 15001-
7 C1 Valve 1 15001-
8 C1 Valve 1 15001-
9 C1 Valve 1 15001-
10 C1 Piston 2 15001-
11 C1 Piston 1 15001-
12 723-26-14220 Spring 2 15001-
13 723-26-14240 Spring 2 15001-
14 723-26-14140 Spring 1 15001-
15 723-26-15230 Plug 4 15001-
16 723-26-15370 Plug 2 15001-
17 07002-12434 O-ring 6 15001-

Reference:H0120-003003 Page:H006005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011353

3
4
2
1

11
10
9
8

3
4
6
7
5

Reference:H0120-003004 Page:H006006

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (4/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 723-26-15220 Plug 4 15001-
2 07002-11223 O-ring 4 15001-
3 C1 Valve 5 15001-
4 723-26-14150 Spring 5 15001-
5 723-26-16230 Plug 1 15001-
6 07000-11008 O-ring 1 15001-
7 07001-01008 Ring, Back-up 1 15001-
8 723-26-16240 Seat 1 15001-
9 C1 Valve 1 15001-
10 723-26-16260 Spring 1 15001-
11 723-26-16270 Retainer 1 15001-

Reference:H0120-003004 Page:H006006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016282

6
7
14
12
1

4
5
3 15
2 13
9
8
11
10

Reference:H0120-003005 Page:H006007

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (5/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Valve Body 1 16107-
C1 Valve Body 1 15001-16106
2 723-26-17180 Plug 2 16107-
723-11-38260 Plug 2 15001-16106
3 07002-11823 O-ring 2 15001-
4 C1 Valve 2 16107-
C1 Valve 2 15001-16106
5 723-26-17170 Spring 2 16107-
722-10-91130 Spring 2 15001-16106
6 723-11-26170 Plug 2 15001-
7 07002-11623 O-ring 2 15001-
8 723-26-16890 Plug 2 15001-
9 07002-11823 O-ring 2 15001-
10 708-8E-16160 Plug 2 15001-
11 07002-11023 O-ring 2 15001-
12 C1 Valve 2 16107-
C1 Valve 2 15001-16106
13 C1 Retainer 2 16107-
C1 Retainer 2 15001-16106
14 C1 Orifice 2 16107-
15 723-26-14640 Spring 2 15001-

Reference:H0120-003005 Page:H006007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011346

32
33
30

31
27
24 29 26
25
9 28
7 8 26 11
6 12
2 10
5
1
4
14 5
3 35
13 36
15 37
28 26
29
27
21
34 20
22
19
18
17

16
23

Reference:H0120-003006 Page:H006008

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (6/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Spool 1 15001-
2 C1 Plug 1 15001-
3 C1 Orifice 1 15001-
4 C1 Seal 1 15001-
5 C1 O-ring 2 15001-
6 723-26-14650 Spring 1 15001-
7 723-26-16940 Flange 1 15001-
8 722-12-19120 O-ring 1 15001-
9 01252-60640 Bolt, Hexagon Socket Head 2 15001-
10 723-11-14350 Orifice 1 15001-
11 722-12-15160 Seal 1 15001-
12 07002-10823 O-ring 1 15001-
13 723-26-16650 Flange 1 15001-
14 723-11-19110 O-ring 1 15001-
15 01252-60820 Bolt, Hexagon Socket Head 2 15001-
16 C1 Case 1 15001-
17 723-11-19110 O-ring 1 15001-
18 C1 Sleeve 1 15001-
19 723-26-16420 Retainer 1 15001-
20 C1 Piston 1 15001-
21 C1 Valve 1 15001-
22 723-26-16450 Spring 1 15001-
23 01252-60855 Bolt, Hexagon Socket Head 2 15001-
24 708-8E-16160 Plug 1 15001-
25 07002-11023 O-ring 1 15001-
26 C1 Plug, Stocking 4 15001-
27 723-26-16460 Plug 2 15001-
Reference:H0120-003006 Page:H006008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 7-Valve (6/18) (#15001-)
Index Code Part Number Description Qty Serial No.
28 07000-11007 O-ring 2 15001-
29 07001-01007 Ring, Back-up 2 15001-
30 07000-12120 O-ring 1 15001-
31 07000-12020 O-ring 1 15001-
32 723-26-15840 O-ring 1 15001-
33 07000-11008 O-ring 1 15001-
34 07000-11006 O-ring 1 15001-
35 723-26-16920 Case 1 15001-
36 722-12-19120 O-ring 1 15001-
37 01252-60640 Bolt, Hexagon Socket Head 2 15001-

Reference:H0120-003006 Page:H006008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011347

7 11
7
6 9 6
10
8 7
7 9

4
1

11 7
7
6
9
6
7
8
7
5
2

Reference:H0120-003007 Page:H006009

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (7/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Valve Body 1 15001-
2 C1 Valve Body 1 15001-
3 C1 Valve Body 1 15001-
4 C1 Valve Body 1 15001-
5 C1 Block 1 15001-
6 07000-12100 O-ring 5 15001-
7 723-11-19130 O-ring 13 15001-
8 723-11-19110 O-ring 2 15001-
9 07000-11006 O-ring 5 15001-
10 702-21-54260 O-ring 1 15001-
11 700-80-61260 O-ring 2 15001-

Reference:H0120-003007 Page:H006009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016283

13
11
12
26 10
24
25

14
16
18 1
26 15
24 25
25
14 22
16
17 27
26 15
24
2
25
19 25
5 22
7
27 3 27
23
25 25
6 22
9
8 27
4
20
21

Reference:H0120-003008 Page:H006010

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (8/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Spool 2 16107-
C1 Spool 2 15001-16106
2 C1 Spool 1 20344-
C1 Spool 1 15001-20343
3 C1 Spool 1 15001-
4 C1 Spool 1 15001-
5 723-26-16470 Plug 1 15001-
6 07000-11005 O-ring 1 15001-
7 07001-01005 Ring, Back-up 1 15001-
8 723-26-16520 Valve 1 15001-
9 723-26-16530 Spring 1 15001-
10 723-11-17330 Retainer 2 15001-
11 723-11-17353 Retainer 2 15001-
12 723-11-17341 Spring 2 15001-
13 723-11-17361 Bolt 2 15001-
14 723-11-27910 Bolt 2 15001-
15 723-26-16560 Retainer 2 15001-
16 723-26-16570 Retainer 2 15001-
17 723-26-16540 Spring 1 15001-
18 723-26-16551 Spring 1 15001-
19 723-26-16480 Retainer 1 15001-
20 723-26-16490 Spacer 1 15001-
21 723-26-14310 Spring 1 15001-
22 723-11-37220 Case 4 15001-
23 723-11-17410 Case, Spring 1 15001-
24 723-11-27880 Case 4 15001-
25 722-12-19120 O-ring 9 15001-
Reference:H0120-003008 Page:H006010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 7-Valve (8/18) (#15001-)
Index Code Part Number Description Qty Serial No.
26 01252-60640 Bolt, Hexagon Socket Head 8 15001-
27 01252-60620 Bolt, Hexagon Socket Head 10 15001-

Reference:H0120-003008 Page:H006010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011350

6
7
3
1
4
5
7
6
6
7
3
4
2 5
7
6

14
15
17
16

14
15
10 17
11 16
9
8

13
12

Reference:H0120-003009 Page:H006011

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (9/18) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-27-50700 Valve Assembly, Control 1 15001-16106
C1 Body Group 1 15001-16106
1 C1 Valve 1 15001-@
2 C1 Valve 1 15001-@
3 C1 Orifice 2 15001-16106
4 C1 Valve Subassembly 2 15001-@
5 723-11-16230 Spring 2 15001-@
6 723-11-15110 Plug 4 15001-@
7 07002-11623 O-ring 4 15001-@
8 723-11-18190 Plug 1 15001-@
9 07002-11023 O-ring 1 15001-@
10 C1 Valve 1 15001-@
11 723-11-18180 Spring 1 15001-@
12 723-26-15230 Plug 1 15001-@
13 07002-12434 O-ring 1 15001-@
14 723-11-38260 Plug 2 15001-16106
15 07002-11823 O-ring 2 15001-@
16 C1 Valve 2 15001-16106
17 722-10-91130 Spring 2 15001-16106

Reference:H0120-003009 Page:H006011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011350

6
7
3
1
4
5
7
6
6
7
3
4
2 5
7
6

14
15
17
16

14
15
10 17
11 16
9
8

13
12

Reference:H0120-003009A Page:H006012

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (9/18) (#16107-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Valve 1 15001-
2 C1 Valve 1 15001-
3 C1 Orifice 2 16107-
4 C1 Valve Subassembly 2 15001-
5 723-11-16230 Spring 2 15001-
6 723-11-15110 Plug 4 15001-
7 07002-11623 O-ring 4 15001-
8 723-11-18190 Plug 1 15001-
9 07002-11023 O-ring 1 15001-
10 C1 Valve 1 15001-
11 723-11-18180 Spring 1 15001-
12 723-26-15230 Plug 1 15001-
13 07002-12434 O-ring 1 15001-
14 723-26-17180 Plug 2 16107-
15 07002-11823 O-ring 2 15001-
16 C1 Valve 2 16107-
17 723-26-17170 Spring 2 16107-

Reference:H0120-003009A Page:H006012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011351
10

6 8

Reference:H0120-003010 Page:H006013

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (10/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
1 700-25-11120 Bolt 4 15001-
2 01643-31032 Washer 4 15001-
3 723-11-29680 Bolt 4 15001-
4 01643-30823 Washer 4 15001-
5 723-26-16510 Bolt 6 15001-
6 01643-30623 Washer 6 15001-
7 01252-60650 Bolt, Hexagon Socket Head 4 15001-
8 01252-60635 Bolt, Hexagon Socket Head 2 15001-
9 01252-60616 Bolt, Hexagon Socket Head 2 15001-
10 04530-10815 Bolt, Eye 2 15001-

Reference:H0120-003010 Page:H006013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
00010536
1

4
3
2

Reference:H0120-003011 Page:H006014

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (11/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
1 723-20-63300 Valve, Relief 1 15001-
2 700-22-11410 O-ring 1 15001-
3 700-80-64220 Ring, Back-up 1 15001-
4 07002-12434 O-ring 1 15001-

Reference:H0120-003011 Page:H006014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
00010537

Reference:H0120-003012 Page:H006015

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (12/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
1 723-20-64200 Valve Assembly, Suction and Relief 1 15001-
2 07002-12034 O-ring 2 15001-

Reference:H0120-003012 Page:H006015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
00010538

Reference:H0120-003013 Page:H006016

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (13/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
1 723-20-64300 Valve Assembly, Suction and Relief 1 15001-
2 07002-12034 O-ring 2 15001-

Reference:H0120-003013 Page:H006016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
00010539

Reference:H0120-003014 Page:H006017

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (14/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
1 723-10-20900 Valve Assembly, Suction and Relief 1 15001-
2 07002-12034 O-ring 2 15001-

Reference:H0120-003014 Page:H006017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
00010540
1

1
2
2
1

Reference:H0120-003015 Page:H006018

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (15/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
1 723-20-80100 Valve Assembly, Suction 9 15001-
2 07002-12034 O-ring 1 15001-
3 723-10-80200 Valve Assembly, Suction 2 15001-
4 07002-12034 O-ring 1 15001-

Reference:H0120-003015 Page:H006018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016294

1
9
8
9
8

10
11
12
13
6 20
2 14
17
16
15
18
19
6
7
5
4 3

Reference:H0120-003016 Page:H006019

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (16/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
723-20-96200 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Plate 1 15001-
3 C1 Plug 1 15001-
4 01010-80620 Bolt 1 15001-
5 01643-30623 Washer 1 15001-
6 723-11-29490 O-ring 2 15001-
7 07000-11009 O-ring 1 15001-
8 07000-11006 O-ring 2 15001-
9 723-11-18150 O-ring 3 15001-
10 C1 Valve 1 15001-
11 C1 Orifice 1 15001-
12 C1 Seal 1 15001-
13 723-20-96140 Spring 1 15001-
723-26-00710 Valve Subassembly 1 15001-
14 C1 Piston 1 15001-
15 C1 Sleeve 1 15001-
16 07000-11010 O-ring 1 15001-
17 07001-01010 Ring, Back-up 1 15001-
18 07000-12012 O-ring 1 15001-
19 07001-02012 Ring, Back-up 1 15001-
20 723-11-19950 Spring 1 15001-

Reference:H0120-003016 Page:H006019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016295

7
8
3
2

1
7
8
6 8
5 7
11 4

12
9
11 10

Reference:H0120-003017 Page:H006020

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (17/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
723-11-02760 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Spool 1 15001-
3 723-11-27830 Spring 1 15001-
4 C1 Valve 1 15001-
5 723-11-18180 Spring 1 15001-
6 723-11-27840 Spacer 1 15001-
7 723-11-27850 Plug 3 15001-
8 07002-11023 O-ring 3 15001-
9 C1 Orifice 1 15001-
10 C1 Plug, Stocking 1 15001-
11 07000-11005 O-ring 3 15001-
12 07000-11007 O-ring 2 15001-

Reference:H0120-003017 Page:H006020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016296

4
5
3
2
1

6
8
7

Reference:H0120-003018 Page:H006021

PC78US-8 S/N 15001-UP


Control Valve, 7-Valve (18/18) (#15001-)
Index Code Part Number Description Qty Serial No.
723-27-50701 Valve, Control 1 16107-
723-11-02590 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Valve 1 15001-
3 723-11-18180 Spring 1 15001-
4 723-11-18190 Plug 1 15001-
5 07002-11023 O-ring 1 15001-
6 C1 Orifice 1 15001-
7 07000-11006 O-ring 1 15001-
8 07000-11008 O-ring 1 15001-

Reference:H0120-003018 Page:H006021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001470
16 12

13
15

14

11

6
7
5 1

4 10
2
3

9
4
8

Reference:H0120-003019 Page:H006022

PC78US-8 S/N 15001-UP


Control Valve, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-53411 Bracket 1 15001-
2 21W-62-11620 Spacer 4 15001-
3 07000-13025 O-ring 4 15001-
4 203-62-42770 Cushion 8 15001-
5 566-35-42430 Plate 4 15001-
6 01010-81245 Bolt 4 15001-
7 01643-31232 Washer 4 15001-
8 01010-81430 Bolt 4 15001-
9 01643-31445 Washer, Flat 4 15001-
10 21W-62-51741 Seal 1 15001-
11 21W-62-51480 Bracket 1 15001-
12 01010-80845 Bolt 2 15001-
13 01643-30823 Washer 2 15001-
14 21W-62-52390 Sheet 1 15001-
15 201-54-35890 Collar 2 15001-
16 201-00-61320 Plate, Caution, Operating Pattern For Blade 1 15001-

Reference:H0120-003019 Page:H006022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, With Blade, 1-Service Valve
FIG. Name FIG. No.
Control Valve, Inner Parts (1/20) (#15001-16106) H0120-006001
Control Valve, Inner Parts (1/20) (#16107-) H0120-006001A
Control Valve, Inner Parts (2/20) (#15001-16106) H0120-006002
Control Valve, Inner Parts (2/20) (#16107-) H0120-006002A
Control Valve, Inner Parts (3/20) H0120-006003
Control Valve, Inner Parts (4/20) H0120-006004
Control Valve, Inner Parts (5/20) H0120-006005
Control Valve, Inner Parts (6/20) H0120-006006
Control Valve, Inner Parts (7/20) H0120-006007
Control Valve, Inner Parts (8/20) H0120-006008
Control Valve, Inner Parts (9/20) (#15001-16106) H0120-006009
Control Valve, Inner Parts (9/20) (#16107-) H0120-006009A
Control Valve, Inner Parts (10/20) H0120-006010
Control Valve, Inner Parts (11/20) H0120-006011
Control Valve, Inner Parts (12/20) H0120-006012
Control Valve, Inner Parts (13/20) H0120-006013
Control Valve, Inner Parts (14/20) H0120-006014
Control Valve, Inner Parts (15/20) H0120-006015
Control Valve, Inner Parts (16/20) H0120-006016
Control Valve, Inner Parts (17/20) H0120-006017
Control Valve, Inner Parts (18/20) H0120-006018
Control Valve, Inner Parts (19/20) H0120-006019
Control Valve, Inner Parts (20/20) H0120-006020
Control Valve, Mounting H0120-006021

Reference:X22-1039590 Page:H007000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012819
2
3 1

5
10 4
9
7
8
6

Reference:H0120-006001 Page:H007001

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (1/20) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-28-51200 Valve Assembly, Control 1 15001-16106
C1 Cover Group 1 15001-16106
1 723-26-21741 Cover 1 15001-16106
2 708-8E-16160 Plug 1 15001-@
3 07002-11023 O-ring 1 15001-@
4 702-21-55620 Plug 1 15001-@
5 07002-11423 O-ring 1 15001-@
6 723-26-16630 Plug 1 15001-16106
7 07000-11009 O-ring 1 15001-16106
8 07001-01009 Ring, Back-up 1 15001-16106
9 07000-11007 O-ring 1 15001-16106
10 07001-01007 Ring, Back-up 1 15001-16106

Reference:H0120-006001 Page:H007001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016246
2
3
1

11 5
9 4
12
13
10 7
6
8
16
15
14

Reference:H0120-006001A Page:H007002

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (1/20) (#16107-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
C1 Cover Group 1 16107-
1 C1 Cover 1 16107-
2 708-8E-16160 Plug 1 15001-
3 07002-11023 O-ring 1 15001-
4 702-21-55620 Plug 1 15001-
5 07002-11423 O-ring 1 15001-
6 702-21-53120 Filter 1 16107-
7 702-21-55420 O-ring 1 16107-
8 C1 Seat 1 16107-
9 723-11-38620 Plug 1 16107-
10 723-26-16990 Plug 1 16107-
11 07002-11223 O-ring 1 16107-
12 07000-11003 O-ring 2 16107-
13 07001-01003 Ring, Back-up 1 16107-
14 723-11-14390 Filter 1 16107-
15 07002-12434 O-ring 1 16107-
16 723-11-19130 O-ring 1 16107-

Reference:H0120-006001A Page:H007002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016247

7
4
6
23 5
24 8
20
17
1
12
7 14
4 9
6
23 17
5 8 21
24
18 24
17 23
2
12
7 14
4 10
6 15
23 16
5 8 14
24 13
22 17
17 21
3 24
12
14 23
11
15
16
14
13
17 28
19 31 29

27
30 26
32
25

Reference:H0120-006002 Page:H007003

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (2/20) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-28-51200 Valve Assembly, Control 1 15001-16106
C1 Body Group 1 15001-16106
1 C1 Block, Valve 1 15001-@
2 C1 Block, Valve 1 15001-@
3 C1 Block, Valve 1 15001-@
4 07000-12120 O-ring 3 15001-@
5 07000-12020 O-ring 3 15001-@
6 723-26-15830 O-ring 3 15001-@
7 723-26-15840 O-ring 3 15001-@
8 07000-11008 O-ring 6 15001-@
9 C1 Spool 1 15001-@
10 C1 Spool 1 15001-@
11 C1 Spool 1 15001-@
12 C1 Plug 3 15001-@
13 C1 Plug 2 15001-@
14 C1 O-ring 5 15001-@
15 C1 Valve 2 15001-@
16 C1 Spring 2 15001-@
17 723-26-15121 Retainer 6 15001-@
18 709-26-11450 Spring 1 15001-@
19 723-26-14490 Spring 1 15001-@
20 723-26-16621 Spring 1 15001-@
21 723-26-14510 Spring 2 15001-@
22 723-26-16621 Spring 1 15001-@
23 723-26-15110 Case 5 15001-@
24 575-41-17420 O-ring 5 15001-16106
723-20-91202 Case Subassembly 1 15001-16106
25 C1 Case 1 15001-16106
26 C1 Seat 1 15001-16106
27 C1 Ball 1 15001-16106
Reference:H0120-006002 Page:H007003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, Inner Parts (2/20) (#15001-16106)
Index Code Part Number Description Qty Serial No.
28 C1 Plug 1 15001-16106
29 07002-10823 O-ring 1 15001-16106
30 575-41-17420 O-ring 1 15001-16106
31 07000-11006 O-ring 1 15001-16106
32 702-21-54260 O-ring 1 15001-16106

Reference:H0120-006002 Page:H007003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016248

7
4
6
23 5
24 8
20
17
1
12
7 14
4 9
6
23 17
5 8 21
24
18 24
17 23
2
12
7 14
4 10
6 15
23 16
5 8 14
24 13
22 17
17 21
3 24
12 23
14
11
15
16
14
13
17
19

24

25
26

Reference:H0120-006002A Page:H007004

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (2/20) (#16107-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Block, Valve 1 15001-
2 C1 Block, Valve 1 15001-
3 C1 Block, Valve 1 15001-
4 07000-12120 O-ring 3 15001-
5 07000-12020 O-ring 3 15001-
6 723-26-15830 O-ring 3 15001-
7 723-26-15840 O-ring 3 15001-
8 07000-11008 O-ring 6 15001-
9 C1 Spool 1 15001-
10 C1 Spool 1 15001-
11 C1 Spool 1 15001-
12 C1 Plug 3 15001-
13 C1 Plug 2 15001-
14 C1 O-ring 5 15001-
15 C1 Valve 2 15001-
16 C1 Spring 2 15001-
17 723-26-15121 Retainer 6 15001-
18 709-26-11450 Spring 1 15001-
19 723-26-14490 Spring 1 15001-
20 723-26-16621 Spring 1 15001-
21 723-26-14510 Spring 2 15001-
22 723-26-16621 Spring 1 15001-
23 723-26-15110 Case 5 15001-
24 575-41-17420 O-ring 6 16107-
25 702-21-54260 O-ring 1 16107-
26 723-26-17110 Case 1 16107-

Reference:H0120-006002A Page:H007004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012823

15
17
4
12

2
3 7
10
13
15 17
17 16
5

8
10
15 14
17
17 15
6
12

3
9 2
11
13
17
16

3
1

Reference:H0120-006003 Page:H007005

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (3/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 01252-60635 Bolt, Hexagon Socket Head 3 15001-
2 01252-60630 Bolt, Hexagon Socket Head 10 15001-
3 01641-20608 Washer 13 15001-
4 C1 Valve 1 15001-
5 C1 Valve 1 15001-
6 C1 Valve 1 15001-
7 C1 Valve 1 15001-
8 C1 Valve 1 15001-
9 C1 Valve 1 15001-
10 C1 Piston 2 15001-
11 C1 Piston 1 15001-
12 723-26-14220 Spring 2 15001-
13 723-26-14240 Spring 2 15001-
14 723-26-14140 Spring 1 15001-
15 723-26-15230 Plug 4 15001-
16 723-26-15370 Plug 2 15001-
17 07002-12434 O-ring 6 15001-

Reference:H0120-006003 Page:H007005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012824

3
4
2
1

11
10
9
8

3
4
6
7
5

Reference:H0120-006004 Page:H007006

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (4/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 723-26-15220 Plug 4 15001-
2 07002-11223 O-ring 4 15001-
3 C1 Valve 5 15001-
4 723-26-14150 Spring 5 15001-
5 723-26-16230 Plug 1 15001-
6 07000-11008 O-ring 1 15001-
7 07001-01008 Ring, Back-up 1 15001-
8 723-26-16240 Seat 1 15001-
9 C1 Valve 1 15001-
10 723-26-16260 Spring 1 15001-
11 723-26-16270 Retainer 1 15001-

Reference:H0120-006004 Page:H007006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016249

6
7
14
12
1

4
5
3 15
2
13
9
8
11
10

Reference:H0120-006005 Page:H007007

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (5/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Valve Body 1 16107-
C1 Valve Body 1 15001-16106
2 723-26-17180 Plug 2 16107-
723-11-38260 Plug 2 15001-16106
3 07002-11823 O-ring 2 15001-
4 C1 Valve 2 16107-
C1 Valve 2 15001-16106
5 723-26-17170 Spring 2 16107-
722-10-91130 Spring 2 15001-16106
6 723-11-26170 Plug 2 15001-
7 07002-11623 O-ring 2 15001-
8 723-26-16890 Plug 2 15001-
9 07002-11823 O-ring 2 15001-
10 708-8E-16160 Plug 2 15001-
11 07002-11023 O-ring 2 15001-
12 C1 Valve 2 16107-
C1 Valve 2 15001-16106
13 C1 Retainer 2 16107-
C1 Retainer 2 15001-16106
14 C1 Orifice 2 16107-
15 723-26-14640 Spring 2 15001-

Reference:H0120-006005 Page:H007007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012826

32
33
30

31
27
24 29 26
25
9 28
7 8 26 11
6 12
2 10
5
1
4
14 5
3 35
13 36
15 37
28 26
29
27
21
34 20
22
19
18
17

16
23

Reference:H0120-006006 Page:H007008

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (6/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Spool 1 15001-
2 C1 Plug 1 15001-
3 C1 Orifice 1 15001-
4 C1 Seal 1 15001-
5 C1 O-ring 2 15001-
6 723-26-14650 Spring 1 15001-
7 723-26-16940 Flange 1 15001-
8 722-12-19120 O-ring 1 15001-
9 01252-60640 Bolt, Hexagon Socket Head 2 15001-
10 723-11-14350 Orifice 1 15001-
11 722-12-15160 Seal 1 15001-
12 07002-10823 O-ring 1 15001-
13 723-26-16650 Flange 1 15001-
14 723-11-19110 O-ring 1 15001-
15 01252-60820 Bolt, Hexagon Socket Head 2 15001-
16 C1 Case 1 15001-
17 723-11-19110 O-ring 1 15001-
18 C1 Sleeve 1 15001-
19 723-26-16420 Retainer 1 15001-
20 C1 Piston 1 15001-
21 C1 Valve 1 15001-
22 723-26-16450 Spring 1 15001-
23 01252-60855 Bolt, Hexagon Socket Head 2 15001-
24 708-8E-16160 Plug 1 15001-
25 07002-11023 O-ring 1 15001-
26 C1 Plug, Stocking 4 15001-
27 723-26-16460 Plug 2 15001-
Reference:H0120-006006 Page:H007008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, Inner Parts (6/20) (#15001-)
Index Code Part Number Description Qty Serial No.
28 07000-11007 O-ring 2 15001-
29 07001-01007 Ring, Back-up 2 15001-
30 07000-12120 O-ring 1 15001-
31 07000-12020 O-ring 1 15001-
32 723-26-15840 O-ring 1 15001-
33 07000-11008 O-ring 1 15001-
34 07000-11006 O-ring 1 15001-
35 723-26-16920 Case 1 15001-
36 722-12-19120 O-ring 1 15001-
37 01252-60640 Bolt, Hexagon Socket Head 2 15001-

Reference:H0120-006006 Page:H007008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012827

7 11
7
6 9 6
10
8 7
7 9

4
1

11 7
7
6
9
6
7
8
7
5
2

Reference:H0120-006007 Page:H007009

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (7/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Valve Body 1 15001-
2 C1 Valve Body 1 15001-
3 C1 Valve Body 1 15001-
4 C1 Valve Body 1 15001-
5 C1 Block 1 15001-
6 07000-12100 O-ring 5 15001-
7 723-11-19130 O-ring 13 15001-
8 723-11-19110 O-ring 2 15001-
9 07000-11006 O-ring 5 15001-
10 702-21-54260 O-ring 1 15001-
11 700-80-61260 O-ring 2 15001-

Reference:H0120-006007 Page:H007009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016250

13
11
12
26 10
24
25

14
16
18 1
26 15
24 25
25 22
14
16
27
17
26 15
24
2
25
25
19
5 22
7
27 27
3
23
25 25
6 22
9
8 27
4
20
21

Reference:H0120-006008 Page:H007010

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (8/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Spool 2 16107-
C1 Spool 2 15001-16106
2 C1 Spool 1 20344-
C1 Spool 1 15001-20343
3 C1 Spool 1 15001-
4 C1 Spool 1 15001-
5 723-26-16470 Plug 1 15001-
6 07000-11005 O-ring 1 15001-
7 07001-01005 Ring, Back-up 1 15001-
8 723-26-16520 Valve 1 15001-
9 723-26-16530 Spring 1 15001-
10 723-11-17330 Retainer 2 15001-
11 723-11-17353 Retainer 2 15001-
12 723-11-17341 Spring 2 15001-
13 723-11-17361 Bolt 2 15001-
14 723-11-27910 Bolt 2 15001-
15 723-26-16560 Retainer 2 15001-
16 723-26-16570 Retainer 2 15001-
17 723-26-16540 Spring 1 15001-
18 723-26-16551 Spring 1 15001-
19 723-26-16480 Retainer 1 15001-
20 723-26-16490 Spacer 1 15001-
21 723-26-14310 Spring 1 15001-
22 723-11-37220 Case 4 15001-
23 723-11-17410 Case, Spring 1 15001-
24 723-11-27880 Case 4 15001-
25 722-12-19120 O-ring 9 15001-
Reference:H0120-006008 Page:H007010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, Inner Parts (8/20) (#15001-)
Index Code Part Number Description Qty Serial No.
26 01252-60640 Bolt, Hexagon Socket Head 8 15001-
27 01252-60620 Bolt, Hexagon Socket Head 10 15001-

Reference:H0120-006008 Page:H007010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012830

6
7
3
1
4
5
7
6
6
7
3
2 4
5
7
6

14
15
17
16

14
15
10 17
11 16
9
8

13
12

Reference:H0120-006009 Page:H007011

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (9/20) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-28-51200 Valve Assembly, Control 1 15001-16106
C1 Body Group 1 15001-16106
1 C1 Valve 1 15001-@
2 C1 Valve 1 15001-@
3 C1 Orifice 2 15001-16106
4 C1 Valve Subassembly 2 15001-@
5 723-11-16230 Spring 2 15001-@
6 723-11-15110 Plug 4 15001-@
7 07002-11623 O-ring 4 15001-@
8 723-11-18190 Plug 1 15001-@
9 07002-11023 O-ring 1 15001-@
10 C1 Valve 1 15001-@
11 723-11-18180 Spring 1 15001-@
12 723-26-15230 Plug 1 15001-@
13 07002-12434 O-ring 1 15001-@
14 723-11-38260 Plug 2 15001-16106
15 07002-11823 O-ring 2 15001-@
16 C1 Valve 2 15001-16106
17 722-10-91130 Spring 2 15001-16106

Reference:H0120-006009 Page:H007011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012830

6
7
3
1
4
5
7
6
6
7
3
2 4
5
7
6

14
15
17
16

14
15
10 17
11 16
9
8

13
12

Reference:H0120-006009A Page:H007012

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (9/20) (#16107-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Valve 1 15001-
2 C1 Valve 1 15001-
3 C1 Orifice 2 16107-
4 C1 Valve Subassembly 2 15001-
5 723-11-16230 Spring 2 15001-
6 723-11-15110 Plug 4 15001-
7 07002-11623 O-ring 4 15001-
8 723-11-18190 Plug 1 15001-
9 07002-11023 O-ring 1 15001-
10 C1 Valve 1 15001-
11 723-11-18180 Spring 1 15001-
12 723-26-15230 Plug 1 15001-
13 07002-12434 O-ring 1 15001-
14 723-26-17180 Plug 2 16107-
15 07002-11823 O-ring 2 15001-
16 723-26-17160 Valve 2 16107-
17 723-26-17170 Spring 2 16107-

Reference:H0120-006009A Page:H007012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012831
10

6 8

Reference:H0120-006010 Page:H007013

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (10/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
1 700-85-11111 Bolt 4 15001-
2 01643-31032 Washer 4 15001-
3 723-11-29680 Bolt 4 15001-
4 01643-30823 Washer 4 15001-
5 723-26-16510 Bolt 6 15001-
6 01643-30623 Washer 6 15001-
7 01252-60650 Bolt, Hexagon Socket Head 4 15001-
8 01252-60635 Bolt, Hexagon Socket Head 2 15001-
9 01252-60616 Bolt, Hexagon Socket Head 2 15001-
10 04530-10815 Bolt, Eye 2 15001-

Reference:H0120-006010 Page:H007013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012832
1

4
3
2

Reference:H0120-006011 Page:H007014

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (11/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
1 723-20-63300 Valve, Relief 1 15001-
2 700-22-11410 O-ring 1 15001-
3 700-80-64220 Ring, Back-up 1 15001-
4 07002-12434 O-ring 1 15001-

Reference:H0120-006011 Page:H007014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012833

Reference:H0120-006012 Page:H007015

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (12/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
1 723-20-64200 Valve Assembly, Suction and Relief 1 15001-
2 07002-12034 O-ring 2 15001-

Reference:H0120-006012 Page:H007015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012834

Reference:H0120-006013 Page:H007016

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (13/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
1 723-20-64300 Valve Assembly, Suction and Relief 1 15001-
2 07002-12034 O-ring 2 15001-

Reference:H0120-006013 Page:H007016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012835

Reference:H0120-006014 Page:H007017

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (14/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
1 723-10-20900 Valve Assembly, Suction and Relief 1 15001-
2 07002-12034 O-ring 2 15001-

Reference:H0120-006014 Page:H007017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012836
1
2

1
2
2
1

Reference:H0120-006015 Page:H007018

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (15/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
1 723-20-80100 Valve Assembly, Suction 9 15001-
2 07002-12034 O-ring 1 15001-
3 723-10-80200 Valve Assembly, Suction 2 15001-
4 07002-12034 O-ring 1 15001-

Reference:H0120-006015 Page:H007018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016289

1
9
8
9
8

10
11
12
13
6
20
2 14
17
16
15
18
19
6
7
5
4 3

Reference:H0120-006016 Page:H007019

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (16/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
723-20-96200 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Plate 1 15001-
3 C1 Plug 1 15001-
4 01010-80620 Bolt 1 15001-
5 01643-30623 Washer 1 15001-
6 723-11-29490 O-ring 2 15001-
7 07000-11009 O-ring 1 15001-
8 07000-11006 O-ring 2 15001-
9 723-11-18150 O-ring 3 15001-
10 C1 Valve 1 15001-
11 C1 Orifice 1 15001-
12 C1 Seal 1 15001-
13 723-20-96140 Spring 1 15001-
723-26-00710 Valve Subassembly 1 15001-
14 C1 Piston 1 15001-
15 C1 Sleeve 1 15001-
16 07000-11010 O-ring 1 15001-
17 07001-01010 Ring, Back-up 1 15001-
18 07000-12012 O-ring 1 15001-
19 07001-02012 Ring, Back-up 1 15001-
20 723-11-19950 Spring 1 15001-

Reference:H0120-006016 Page:H007019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016290

7
8
3
2

1
7
8
6 8
5 7
11 4

12
9
11 10

Reference:H0120-006017 Page:H007020

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (17/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
723-11-02760 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Spool 1 15001-
3 723-11-27830 Spring 1 15001-
4 C1 Valve 1 15001-
5 723-11-18180 Spring 1 15001-
6 723-11-27840 Spacer 1 15001-
7 723-11-27850 Plug 3 15001-
8 07002-11023 O-ring 3 15001-
9 C1 Orifice 1 15001-
10 C1 Plug, Stocking 1 15001-
11 07000-11005 O-ring 3 15001-
12 07000-11007 O-ring 2 15001-

Reference:H0120-006017 Page:H007020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016291

4
5
3
2
1

6
8
7

Reference:H0120-006018 Page:H007021

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (18/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
723-11-02590 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Valve 1 15001-
3 723-11-18180 Spring 1 15001-
4 723-11-18190 Plug 1 15001-
5 07002-11023 O-ring 1 15001-
6 C1 Orifice 1 15001-
7 07000-11006 O-ring 1 15001-
8 07000-11008 O-ring 1 15001-

Reference:H0120-006018 Page:H007021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016252

14
15
12
6
13
5

4
3

11 2
10
8 1
9

10
11
13
12
15
14

Reference:H0120-006019 Page:H007022

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (19/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
723-21-07601 Valve Subassembly 1 16107-
723-21-07600 Valve Subassembly 1 15001-16106
1 C1 Block, Valve 1 15001-
2 07000-12120 O-ring 1 15001-
3 07000-12020 O-ring 1 15001-
4 723-26-15830 O-ring 1 15001-
5 723-26-15840 O-ring 1 15001-
6 07000-11008 O-ring 2 15001-
7 C1 Spool 1 15001-
8 C1 Plug 1 15001-
9 C1 O-ring 1 15001-
10 723-26-15121 Retainer 2 15001-
11 709-26-11450 Spring 2 15001-
12 723-26-15110 Case 2 15001-
13 575-41-17420 O-ring 2 15001-
14 01252-60630 Bolt, Hexagon Socket Head 4 15001-
15 01641-20608 Washer 4 15001-

Reference:H0120-006019 Page:H007022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012843
5
6
1

11 4
3
12 6
5

9
10
8
7 12

11

Reference:H0120-006020 Page:H007023

PC78US-8 S/N 15001-UP


Control Valve, Inner Parts (20/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51201 Valve, Control 1 16107-
723-21-07601 Valve Subassembly 1 16107-
723-21-07600 Valve Subassembly 1 15001-16106
1 C1 Valve 1 15001-
2 C1 Valve 1 15001-
3 C1 Piston 1 15001-
4 723-26-14140 Spring 1 15001-
5 723-26-15230 Plug 2 15001-
6 07002-12434 O-ring 2 15001-
7 723-26-15220 Plug 2 15001-
8 07002-11223 O-ring 2 15001-
9 C1 Valve 2 15001-
10 723-26-14150 Spring 2 15001-
11 723-20-62400 Valve, Relief 2 15001-
12 07002-12034 O-ring 2 15001-

Reference:H0120-006020 Page:H007023
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001609
12
16
13
15

14

11

6
7
5 1

4 10
2
3

9
4
8

Reference:H0120-006021 Page:H007024

PC78US-8 S/N 15001-UP


Control Valve, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-53411 Bracket 1 15001-
2 21W-62-11620 Spacer 4 15001-
3 07000-13025 O-ring 4 15001-
4 203-62-42770 Cushion 8 15001-
5 566-35-42430 Plate 4 15001-
6 01010-81245 Bolt 4 15001-
7 01643-31232 Washer 4 15001-
8 01010-81430 Bolt 4 15001-
9 01643-31445 Washer, Flat 4 15001-
10 21W-62-51741 Seal 1 15001-
11 21W-62-51581 Bracket 1 15655-
21W-62-51580 Bracket 1 15001-15654
12 01010-80845 Bolt 2 15001-
13 01643-30823 Washer 2 15001-
14 21W-62-52390 Sheet 1 15001-
15 201-54-35890 Collar 2 15001-
16 201-00-61320 Plate, Caution, Operating Pattern For Blade 1 15001-

Reference:H0120-006021 Page:H007024
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, With Blade, 1-Additional Actuator Piping
FIG. Name FIG. No.
Control Valve, 8-Valve (1/20) (#15001-16106) H0120-002001
Control Valve, 8-Valve (1/20) (#16107-) H0120-002001A
Control Valve, 8-Valve (2/20) (#15001-16106) H0120-002002
Control Valve, 8-Valve (2/20) (#16107-) H0120-002002A
Control Valve, 8-Valve (3/20) H0120-002003
Control Valve, 8-Valve (4/20) H0120-002004
Control Valve, 8-Valve (5/20) H0120-002005
Control Valve, 8-Valve (6/20) H0120-002006
Control Valve, 8-Valve (7/20) H0120-002007
Control Valve, 8-Valve (8/20) H0120-002008
Control Valve, 8-Valve (9/20) (#15001-16106) H0120-002009
Control Valve, 8-Valve (9/20) (#16107-) H0120-002009A
Control Valve, 8-Valve (10/20) H0120-002010
Control Valve, 8-Valve (11/20) H0120-002011
Control Valve, 8-Valve (12/20) H0120-002012
Control Valve, 8-Valve (13/20) H0120-002013
Control Valve, 8-Valve (14/20) H0120-002014
Control Valve, 8-Valve (15/20) H0120-002015
Control Valve, 8-Valve (16/20) H0120-002016
Control Valve, 8-Valve (17/20) H0120-002017
Control Valve, 8-Valve (18/20) H0120-002018
Control Valve, 8-Valve (19/20) H0120-002019
Control Valve, 8-Valve (20/20) H0120-002020
Control Valve, Mounting H0120-002021

Reference:X22-1038910 Page:H008000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012819
2
3 1

5
10 4
9
7
8
6

Reference:H0120-002001 Page:H008001

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (1/20) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-28-51100 Valve Assembly, Control 1 15001-16106
C1 Cover Group 1 15001-16106
1 723-26-21741 Cover 1 15001-16106
2 708-8E-16160 Plug 1 15001-@
3 07002-11023 O-ring 1 15001-@
4 702-21-55620 Plug 1 15001-@
5 07002-11423 O-ring 1 15001-@
6 723-26-16630 Plug 1 15001-16106
7 07000-11009 O-ring 1 15001-16106
8 07001-01009 Ring, Back-up 1 15001-16106
9 07000-11007 O-ring 1 15001-16106
10 07001-01007 Ring, Back-up 1 15001-16106

Reference:H0120-002001 Page:H008001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016246
2
3
1

11 5
9 4
12
13
10 7
6
8
16
15
14

Reference:H0120-002001A Page:H008002

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (1/20) (#16107-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
C1 Cover Group 1 16107-
1 C1 Cover 1 16107-
2 708-8E-16160 Plug 1 15001-
3 07002-11023 O-ring 1 15001-
4 702-21-55620 Plug 1 15001-
5 07002-11423 O-ring 1 15001-
6 702-21-53120 Filter 1 16107-
7 702-21-55420 O-ring 1 16107-
8 C1 Seat 1 16107-
9 723-11-38620 Plug 1 16107-
10 723-26-16990 Plug 1 16107-
11 07002-11223 O-ring 1 16107-
12 07000-11003 O-ring 2 16107-
13 07001-01003 Ring, Back-up 1 16107-
14 723-11-14390 Filter 1 16107-
15 07002-12434 O-ring 1 16107-
16 723-11-19130 O-ring 1 16107-

Reference:H0120-002001A Page:H008002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016247

7
4
6
23 5
24 8
20
17
1
12
7 14
4 9
6
23 17
5 8 21
24
18 24
17 23
2
12
7 14
4 10
6 15
23 16
5 8 14
24 13
22 17
17 21
3 24
12
14 23
11
15
16
14
13
17 28
19 31 29

27
30 26
32
25

Reference:H0120-002002 Page:H008003

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (2/20) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-28-51100 Valve Assembly, Control 1 15001-16106
C1 Body Group 1 15001-16106
1 C1 Block, Valve 1 15001-@
2 C1 Block, Valve 1 15001-@
3 C1 Block, Valve 1 15001-@
4 07000-12120 O-ring 3 15001-@
5 07000-12020 O-ring 3 15001-@
6 723-26-15830 O-ring 3 15001-@
7 723-26-15840 O-ring 3 15001-@
8 07000-11008 O-ring 6 15001-@
9 C1 Spool 1 15001-@
10 C1 Spool 1 15001-@
11 C1 Spool 1 15001-@
12 C1 Plug 3 15001-@
13 C1 Plug 2 15001-@
14 C1 O-ring 5 15001-@
15 C1 Valve 2 15001-@
16 C1 Spring 2 15001-@
17 723-26-15121 Retainer 6 15001-@
18 709-26-11450 Spring 1 15001-@
19 723-26-14490 Spring 1 15001-@
20 723-26-16621 Spring 1 15001-@
21 723-26-14510 Spring 2 15001-@
22 723-26-16621 Spring 1 15001-@
23 723-26-15110 Case 5 15001-@
24 575-41-17420 O-ring 5 15001-16106
723-20-91202 Case Subassembly 1 15001-16106
25 C1 Case 1 15001-16106
26 C1 Seat 1 15001-16106
27 C1 Ball 1 15001-16106
Reference:H0120-002002 Page:H008003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 8-Valve (2/20) (#15001-16106)
Index Code Part Number Description Qty Serial No.
28 C1 Plug 1 15001-16106
29 07002-10823 O-ring 1 15001-16106
30 575-41-17420 O-ring 1 15001-16106
31 07000-11006 O-ring 1 15001-16106
32 702-21-54260 O-ring 1 15001-16106

Reference:H0120-002002 Page:H008003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016248

7
4
6
23 5
24 8
20
17
1
12
7 14
4 9
6
23 17
5 8 21
24
18 24
17 23
2
12
7 14
4 10
6 15
23 16
5 8 14
24 13
22 17
17 21
3 24
12 23
14
11
15
16
14
13
17
19

24

25
26

Reference:H0120-002002A Page:H008004

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (2/20) (#16107-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Block, Valve 1 15001-
2 C1 Block, Valve 1 15001-
3 C1 Block, Valve 1 15001-
4 07000-12120 O-ring 3 15001-
5 07000-12020 O-ring 3 15001-
6 723-26-15830 O-ring 3 15001-
7 723-26-15840 O-ring 3 15001-
8 07000-11008 O-ring 6 15001-
9 C1 Spool 1 15001-
10 C1 Spool 1 15001-
11 C1 Spool 1 15001-
12 C1 Plug 3 15001-
13 C1 Plug 2 15001-
14 C1 O-ring 5 15001-
15 C1 Valve 2 15001-
16 C1 Spring 2 15001-
17 723-26-15121 Retainer 6 15001-
18 709-26-11450 Spring 1 15001-
19 723-26-14490 Spring 1 15001-
20 723-26-16621 Spring 1 15001-
21 723-26-14510 Spring 2 15001-
22 723-26-16621 Spring 1 15001-
23 723-26-15110 Case 5 15001-
24 575-41-17420 O-ring 6 16107-
25 702-21-54260 O-ring 1 16107-
26 723-26-17110 Case 1 16107-

Reference:H0120-002002A Page:H008004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012823

15
17
4
12

2
3 7
10
13
15 17
17 16
5

8
10
15 14
17
17 15
6
12

3
9 2
11
13
17
16

3
1

Reference:H0120-002003 Page:H008005

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (3/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 01252-60635 Bolt, Hexagon Socket Head 3 15001-
2 01252-60630 Bolt, Hexagon Socket Head 10 15001-
3 01641-20608 Washer 13 15001-
4 C1 Valve 1 15001-
5 C1 Valve 1 15001-
6 C1 Valve 1 15001-
7 C1 Valve 1 15001-
8 C1 Valve 1 15001-
9 C1 Valve 1 15001-
10 C1 Piston 2 15001-
11 C1 Piston 1 15001-
12 723-26-14220 Spring 2 15001-
13 723-26-14240 Spring 2 15001-
14 723-26-14140 Spring 1 15001-
15 723-26-15230 Plug 4 15001-
16 723-26-15370 Plug 2 15001-
17 07002-12434 O-ring 6 15001-

Reference:H0120-002003 Page:H008005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012824

3
4
2
1

11
10
9
8

3
4
6
7
5

Reference:H0120-002004 Page:H008006

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (4/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 723-26-15220 Plug 4 15001-
2 07002-11223 O-ring 4 15001-
3 C1 Valve 5 15001-
4 723-26-14150 Spring 5 15001-
5 723-26-16230 Plug 1 15001-
6 07000-11008 O-ring 1 15001-
7 07001-01008 Ring, Back-up 1 15001-
8 723-26-16240 Seat 1 15001-
9 C1 Valve 1 15001-
10 723-26-16260 Spring 1 15001-
11 723-26-16270 Retainer 1 15001-

Reference:H0120-002004 Page:H008006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016249

6
7
14
12
1

4
5
3 15
2
13
9
8
11
10

Reference:H0120-002005 Page:H008007

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (5/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Valve Body 1 16107-
C1 Valve Body 1 15001-16106
2 723-26-17180 Plug 2 16107-
723-11-38260 Plug 2 15001-16106
3 07002-11823 O-ring 2 15001-
4 C1 Valve 2 16107-
C1 Valve 2 15001-16106
5 723-26-17170 Spring 2 16107-
722-10-91130 Spring 2 15001-16106
6 723-11-26170 Plug 2 15001-
7 07002-11623 O-ring 2 15001-
8 723-26-16890 Plug 2 15001-
9 07002-11823 O-ring 2 15001-
10 708-8E-16160 Plug 2 15001-
11 07002-11023 O-ring 2 15001-
12 C1 Valve 2 16107-
C1 Valve 2 15001-16106
13 C1 Retainer 2 16107-
C1 Retainer 2 15001-16106
14 C1 Orifice 2 16107-
15 723-26-14640 Spring 2 15001-

Reference:H0120-002005 Page:H008007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012826

32
33
30

31
27
24 29 26
25
9 28
7 8 26 11
6 12
2 10
5
1
4
14 5
3 35
13 36
15 37
28 26
29
27
21
34 20
22
19
18
17

16
23

Reference:H0120-002006 Page:H008008

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (6/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Spool 1 15001-
2 C1 Plug 1 15001-
3 C1 Orifice 1 15001-
4 C1 Seal 1 15001-
5 C1 O-ring 2 15001-
6 723-26-14650 Spring 1 15001-
7 723-26-16940 Flange 1 15001-
8 722-12-19120 O-ring 1 15001-
9 01252-60640 Bolt, Hexagon Socket Head 2 15001-
10 723-11-14350 Orifice 1 15001-
11 722-12-15160 Seal 1 15001-
12 07002-10823 O-ring 1 15001-
13 723-26-16650 Flange 1 15001-
14 723-11-19110 O-ring 1 15001-
15 01252-60820 Bolt, Hexagon Socket Head 2 15001-
16 C1 Case 1 15001-
17 723-11-19110 O-ring 1 15001-
18 C1 Sleeve 1 15001-
19 723-26-16420 Retainer 1 15001-
20 C1 Piston 1 15001-
21 C1 Valve 1 15001-
22 723-26-16450 Spring 1 15001-
23 01252-60855 Bolt, Hexagon Socket Head 2 15001-
24 708-8E-16160 Plug 1 15001-
25 07002-11023 O-ring 1 15001-
26 C1 Plug, Stocking 4 15001-
27 723-26-16460 Plug 2 15001-
Reference:H0120-002006 Page:H008008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 8-Valve (6/20) (#15001-)
Index Code Part Number Description Qty Serial No.
28 07000-11007 O-ring 2 15001-
29 07001-01007 Ring, Back-up 2 15001-
30 07000-12120 O-ring 1 15001-
31 07000-12020 O-ring 1 15001-
32 723-26-15840 O-ring 1 15001-
33 07000-11008 O-ring 1 15001-
34 07000-11006 O-ring 1 15001-
35 723-26-16920 Case 1 15001-
36 722-12-19120 O-ring 1 15001-
37 01252-60640 Bolt, Hexagon Socket Head 2 15001-

Reference:H0120-002006 Page:H008008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012827

7 11
7
6 9 6
10
8 7
7 9

4
1

11 7
7
6
9
6
7
8
7
5
2

Reference:H0120-002007 Page:H008009

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (7/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Valve Body 1 15001-
2 C1 Valve Body 1 15001-
3 C1 Valve Body 1 15001-
4 C1 Valve Body 1 15001-
5 C1 Block 1 15001-
6 07000-12100 O-ring 5 15001-
7 723-11-19130 O-ring 13 15001-
8 723-11-19110 O-ring 2 15001-
9 07000-11006 O-ring 5 15001-
10 702-21-54260 O-ring 1 15001-
11 700-80-61260 O-ring 2 15001-

Reference:H0120-002007 Page:H008009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016250

13
11
12
26 10
24
25

14
16
18 1
26 15
24 25
25 22
14
16
27
17
26 15
24
2
25
25
19
5 22
7
27 27
3
23
25 25
6 22
9
8 27
4
20
21

Reference:H0120-002008 Page:H008010

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (8/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
C1 Body Group 1 16107-
C1 Body Group 1 15001-16106
1 C1 Spool 2 16107-
C1 Spool 2 15001-16106
2 C1 Spool 1 20344-
C1 Spool 1 15001-20343
3 C1 Spool 1 15001-
4 C1 Spool 1 15001-
5 723-26-16470 Plug 1 15001-
6 07000-11005 O-ring 1 15001-
7 07001-01005 Ring, Back-up 1 15001-
8 723-26-16520 Valve 1 15001-
9 723-26-16530 Spring 1 15001-
10 723-11-17330 Retainer 2 15001-
11 723-11-17353 Retainer 2 15001-
12 723-11-17341 Spring 2 15001-
13 723-11-17361 Bolt 2 15001-
14 723-11-27910 Bolt 2 15001-
15 723-26-16560 Retainer 2 15001-
16 723-26-16570 Retainer 2 15001-
17 723-26-16540 Spring 1 15001-
18 723-26-16551 Spring 1 15001-
19 723-26-16480 Retainer 1 15001-
20 723-26-16490 Spacer 1 15001-
21 723-26-14310 Spring 1 15001-
22 723-11-37220 Case 4 15001-
23 723-11-17410 Case, Spring 1 15001-
24 723-11-27880 Case 4 15001-
25 722-12-19120 O-ring 9 15001-
Reference:H0120-002008 Page:H008010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Control Valve, 8-Valve (8/20) (#15001-)
Index Code Part Number Description Qty Serial No.
26 01252-60640 Bolt, Hexagon Socket Head 8 15001-
27 01252-60620 Bolt, Hexagon Socket Head 10 15001-

Reference:H0120-002008 Page:H008010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012830

6
7
3
1
4
5
7
6
6
7
3
2 4
5
7
6

14
15
17
16

14
15
10 17
11 16
9
8

13
12

Reference:H0120-002009 Page:H008011

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (9/20) (#15001-16106)
Index Code Part Number Description Qty Serial No.
723-28-51100 Valve Assembly, Control 1 15001-16106
C1 Body Group 1 15001-16106
1 C1 Valve 1 15001-@
2 C1 Valve 1 15001-@
3 C1 Orifice 2 15001-16106
4 C1 Valve Subassembly 2 15001-@
5 723-11-16230 Spring 2 15001-@
6 723-11-15110 Plug 4 15001-@
7 07002-11623 O-ring 4 15001-@
8 723-11-18190 Plug 1 15001-@
9 07002-11023 O-ring 1 15001-@
10 C1 Valve 1 15001-@
11 723-11-18180 Spring 1 15001-@
12 723-26-15230 Plug 1 15001-@
13 07002-12434 O-ring 1 15001-@
14 723-11-38260 Plug 2 15001-16106
15 07002-11823 O-ring 2 15001-@
16 C1 Valve 2 15001-16106
17 722-10-91130 Spring 2 15001-16106

Reference:H0120-002009 Page:H008011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012830

6
7
3
1
4
5
7
6
6
7
3
2 4
5
7
6

14
15
17
16

14
15
10 17
11 16
9
8

13
12

Reference:H0120-002009A Page:H008012

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (9/20) (#16107-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
C1 Body Group 1 16107-
1 C1 Valve 1 15001-
2 C1 Valve 1 15001-
3 C1 Orifice 2 16107-
4 C1 Valve Subassembly 2 15001-
5 723-11-16230 Spring 2 15001-
6 723-11-15110 Plug 4 15001-
7 07002-11623 O-ring 4 15001-
8 723-11-18190 Plug 1 15001-
9 07002-11023 O-ring 1 15001-
10 C1 Valve 1 15001-
11 723-11-18180 Spring 1 15001-
12 723-26-15230 Plug 1 15001-
13 07002-12434 O-ring 1 15001-
14 723-26-17180 Plug 2 16107-
15 07002-11823 O-ring 2 15001-
16 C1 Valve 2 16107-
17 723-26-17170 Spring 2 16107-

Reference:H0120-002009A Page:H008012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012831
10

6 8

Reference:H0120-002010 Page:H008013

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (10/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
1 700-85-11111 Bolt 4 15001-
2 01643-31032 Washer 4 15001-
3 723-11-29680 Bolt 4 15001-
4 01643-30823 Washer 4 15001-
5 723-26-16510 Bolt 6 15001-
6 01643-30623 Washer 6 15001-
7 01252-60650 Bolt, Hexagon Socket Head 4 15001-
8 01252-60635 Bolt, Hexagon Socket Head 2 15001-
9 01252-60616 Bolt, Hexagon Socket Head 2 15001-
10 04530-10815 Bolt, Eye 2 15001-

Reference:H0120-002010 Page:H008013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012832
1

4
3
2

Reference:H0120-002011 Page:H008014

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (11/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
1 723-20-63300 Valve, Relief 1 15001-
2 700-22-11410 O-ring 1 15001-
3 700-80-64220 Ring, Back-up 1 15001-
4 07002-12434 O-ring 1 15001-

Reference:H0120-002011 Page:H008014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012833

Reference:H0120-002012 Page:H008015

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (12/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
1 723-20-64200 Valve Assembly, Suction and Relief 1 15001-
2 07002-12034 O-ring 2 15001-

Reference:H0120-002012 Page:H008015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012834

Reference:H0120-002013 Page:H008016

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (13/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
1 723-20-64300 Valve Assembly, Suction and Relief 1 15001-
2 07002-12034 O-ring 2 15001-

Reference:H0120-002013 Page:H008016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012835

Reference:H0120-002014 Page:H008017

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (14/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
1 723-10-20900 Valve Assembly, Suction and Relief 1 15001-
2 07002-12034 O-ring 2 15001-

Reference:H0120-002014 Page:H008017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012836
1
2

1
2
2
1

Reference:H0120-002015 Page:H008018

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (15/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
1 723-20-80100 Valve Assembly, Suction 9 15001-
2 07002-12034 O-ring 1 15001-
3 723-10-80200 Valve Assembly, Suction 2 15001-
4 07002-12034 O-ring 1 15001-

Reference:H0120-002015 Page:H008018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016289

1
9
8
9
8

10
11
12
13
6
20
2 14
17
16
15
18
19
6
7
5
4 3

Reference:H0120-002016 Page:H008019

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (16/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
723-20-96200 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Plate 1 15001-
3 C1 Plug 1 15001-
4 01010-80620 Bolt 1 15001-
5 01643-30623 Washer 1 15001-
6 723-11-29490 O-ring 2 15001-
7 07000-11009 O-ring 1 15001-
8 07000-11006 O-ring 2 15001-
9 723-11-18150 O-ring 3 15001-
10 C1 Valve 1 15001-
11 C1 Orifice 1 15001-
12 C1 Seal 1 15001-
13 723-20-96140 Spring 1 15001-
723-26-00710 Valve Subassembly 1 15001-
14 C1 Piston 1 15001-
15 C1 Sleeve 1 15001-
16 07000-11010 O-ring 1 15001-
17 07001-01010 Ring, Back-up 1 15001-
18 07000-12012 O-ring 1 15001-
19 07001-02012 Ring, Back-up 1 15001-
20 723-11-19950 Spring 1 15001-

Reference:H0120-002016 Page:H008019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016290

7
8
3
2

1
7
8
6 8
5 7
11 4

12
9
11 10

Reference:H0120-002017 Page:H008020

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (17/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
723-11-02760 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Spool 1 15001-
3 723-11-27830 Spring 1 15001-
4 C1 Valve 1 15001-
5 723-11-18180 Spring 1 15001-
6 723-11-27840 Spacer 1 15001-
7 723-11-27850 Plug 3 15001-
8 07002-11023 O-ring 3 15001-
9 C1 Orifice 1 15001-
10 C1 Plug, Stocking 1 15001-
11 07000-11005 O-ring 3 15001-
12 07000-11007 O-ring 2 15001-

Reference:H0120-002017 Page:H008020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016291

4
5
3
2
1

6
8
7

Reference:H0120-002018 Page:H008021

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (18/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
723-11-02590 Valve Assembly 1 15001-
1 C1 Block 1 15001-
2 C1 Valve 1 15001-
3 723-11-18180 Spring 1 15001-
4 723-11-18190 Plug 1 15001-
5 07002-11023 O-ring 1 15001-
6 C1 Orifice 1 15001-
7 07000-11006 O-ring 1 15001-
8 07000-11008 O-ring 1 15001-

Reference:H0120-002018 Page:H008021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016252

14
15
12
6
13
5

4
3

11 2
10
8 1
9

10
11
13
12
15
14

Reference:H0120-002019 Page:H008022

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (19/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
723-21-07501 Valve Subassembly 1 16107-
723-21-07500 Valve Subassembly 1 15001-16106
1 C1 Block, Valve 1 15001-
2 07000-12120 O-ring 1 15001-
3 07000-12020 O-ring 1 15001-
4 723-26-15830 O-ring 1 15001-
5 723-26-15840 O-ring 1 15001-
6 07000-11008 O-ring 2 15001-
7 C1 Spool 1 15001-
8 C1 Plug 1 15001-
9 C1 O-ring 1 15001-
10 723-26-15121 Retainer 2 15001-
11 709-26-11450 Spring 2 15001-
12 723-26-15110 Case 2 15001-
13 575-41-17420 O-ring 2 15001-
14 01252-60630 Bolt, Hexagon Socket Head 4 15001-
15 01641-20608 Washer 4 15001-

Reference:H0120-002019 Page:H008022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY016278

5
6
1

2
4
11 3
12 6
5

9
10
8
7 12
11

Reference:H0120-002020 Page:H008023

PC78US-8 S/N 15001-UP


Control Valve, 8-Valve (20/20) (#15001-)
Index Code Part Number Description Qty Serial No.
723-28-51101 Valve, Control 1 16107-
723-21-07501 Valve Subassembly 1 16107-
723-21-07500 Valve Subassembly 1 15001-16106
1 C1 Valve 1 15001-
2 C1 Valve 1 15001-
3 C1 Piston 1 15001-
4 723-26-14140 Spring 1 15001-
5 723-26-15230 Plug 2 15001-
6 07002-12434 O-ring 2 15001-
7 723-26-15220 Plug 2 15001-
8 07002-11223 O-ring 2 15001-
9 C1 Valve 2 15001-
10 723-26-14150 Spring 2 15001-
11 723-20-80100 Valve Assembly, Suction 2 15001-
12 07002-12034 O-ring 1 15001-

Reference:H0120-002020 Page:H008023
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001608
12
16
13
15

14

11

6
7
5 1

4 10
2
3

9
4
8

Reference:H0120-002021 Page:H008024

PC78US-8 S/N 15001-UP


Control Valve, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-53411 Bracket 1 15001-
2 21W-62-11620 Spacer 4 15001-
3 07000-13025 O-ring 4 15001-
4 203-62-42770 Cushion 8 15001-
5 566-35-42430 Plate 4 15001-
6 01010-81245 Bolt 4 15001-
7 01643-31232 Washer 4 15001-
8 01010-81430 Bolt 4 15001-
9 01643-31445 Washer, Flat 4 15001-
10 21W-62-51741 Seal 1 15001-
11 21W-62-51580 Bracket 1 15001-
12 01010-80845 Bolt 2 15001-
13 01643-30823 Washer 2 15001-
14 21W-62-52390 Sheet 1 15001-
15 201-54-35890 Collar 2 15001-
16 201-00-61320 Plate, Caution, Operating Pattern For Blade 1 15001-

Reference:H0120-002021 Page:H008024
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hydraulic Pump, Without Blade
FIG. Name FIG. No.
Hydraulic Pump, Piston Pump (1/4) (#15001-15940) H0210-001001
Hydraulic Pump, Piston Pump (1/4) (#15941-) H0210-001001A
Hydraulic Pump, Piston Pump (2/4) (#15001-15940) H0210-001002
Hydraulic Pump, Piston Pump (2/4) (#15941-) H0210-001002A
Hydraulic Pump, Piston Pump (3/4) H0210-001003
Hydraulic Pump, Piston Pump (4/4) H0210-001004

Reference:X22-1035721 Page:H009000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012854
7
10
8 11
9 2 12
2

17
2 18
2 5
18
23

17 12
11
4 1
15 6
16 3
13
14

19

20
21
22
24
26
25
27

Reference:H0210-001001 Page:H009001

PC78US-8 S/N 15001-UP


Hydraulic Pump, Piston Pump (1/4) (#15001-15940)
Index Code Part Number Description Qty Serial No.
708-3T-00281 Pump Assembly 1 15488-15940
708-3T-00280 Pump Assembly 1 15001-15487
708-3T-01140 Pump Subassembly 1 15488-15940
708-3T-01131 Pump Subassembly 1 15001-15487
708-3T-04171 Case Assembly 1 15001-15940
1 C1 Case, Pump 1 15001-15940
2 C1 Plug, Stocking 13 15001-@
3 07044-12412 Plug 1 15001-@
4 07002-62434 O-ring 1 15001-@
5 04530-11018 Bolt, Eye 1 15001-@
6 C2 (720-68-19610) Pin 1 15001-@
7 C2 (708-3T-14151) Plug 2 15001-@
8 C2 (708-3T-14170) Ball 2 15001-@
9 C2 (708-3T-14160) Seat 2 15001-@
10 07002-61023 O-ring 2 15001-@
11 708-8E-16150 Plug 2 15001-@
12 07002-61023 O-ring 2 15001-@
708-3T-04190 Plug Subassembly 1 15001-@
13 C1 Plug 1 15001-@
14 C1 Plug, Stocking 1 15001-@
15 C1 Seal 2 15001-@
16 07002-11223 O-ring 1 15001-@
17 708-1L-25210 Plug 2 15001-@
18 07002-11423 O-ring 2 15001-@
19 C2 (708-3T-12250) Shaft 1 15488-@
20 C2 (708-1W-22140) Bearing 1 15001-@
21 C2 (708-23-05011) Washer Kit 1 15001-@
C1 Washer, T=2.6mm 1 15001-@
C1 Washer, T=2.7mm 1 15001-@
C1 Washer, T=2.8mm 1 15001-@
Reference:H0210-001001 Page:H009001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hydraulic Pump, Piston Pump (1/4) (#15001-15940)
Index Code Part Number Description Qty Serial No.
21 C1 Washer, T=2.5mm 1 15001-@
22 C2 (708-23-12840) Ring, Snap 1 15001-@
23 C2 (708-1W-22320) Bearing 1 15001-@
24 708-8D-12221 Seal, Oil 1 15001-@
25 708-3T-12210 Case 1 15001-@
26 07000-12065 O-ring 1 15001-@
27 04065-07225 Ring, Snap 1 15001-@

Reference:H0210-001001 Page:H009001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY015764
8
11
9
12
10 2 13
2

3
18
2 19
2 6
19
24

18 13
12
5 1
7
16
17 4
14
15

20

21
22
23
25
27
26
28

Reference:H0210-001001A Page:H009002

PC78US-8 S/N 15001-UP


Hydraulic Pump, Piston Pump (1/4) (#15941-)
Index Code Part Number Description Qty Serial No.
708-3T-00283 Pump Assembly 1 15941-
708-3T-01142 Pump Subassembly 1 15941-
708-3T-04250 Case Subassembly 1 15941-
1 C1 Case 1 15941-
2 C1 Plug, Stocking 13 15001-
3 C1 Orifice 1 15941-
4 07044-12412 Plug 1 15001-
5 07002-62434 O-ring 1 15001-
6 04530-11018 Bolt, Eye 1 15001-
7 C2 (720-68-19610) Pin 1 15001-
8 C2 (708-3T-14151) Plug 2 15001-
9 C2 (708-3T-14170) Ball 2 15001-
10 C2 (708-3T-14160) Seat 2 15001-
11 07002-61023 O-ring 2 15001-
12 708-8E-16150 Plug 2 15001-
13 07002-61023 O-ring 2 15001-
708-3T-04190 Plug Subassembly 1 15001-
14 C1 Plug 1 15001-
15 C1 Plug, Stocking 1 15001-
16 C1 Seal 2 15001-
17 07002-11223 O-ring 1 15001-
18 708-1L-25210 Plug 2 15001-
19 07002-11423 O-ring 2 15001-
20 C2 (708-3T-12250) Shaft 1 15488-
21 C2 (708-1W-22140) Bearing 1 15001-
22 C2 (708-23-05011) Washer Kit 1 15001-
C1 Washer, T=2.6mm 1 15001-
C1 Washer, T=2.7mm 1 15001-
C1 Washer, T=2.8mm 1 15001-
C1 Washer, T=2.5mm 1 15001-
Reference:H0210-001001A Page:H009002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hydraulic Pump, Piston Pump (1/4) (#15941-)
Index Code Part Number Description Qty Serial No.
23 C2 (708-23-12840) Ring, Snap 1 15001-
24 C2 (708-1W-22320) Bearing 1 15001-
25 708-8D-12221 Seal, Oil 1 15001-
26 708-3T-12210 Case 1 15001-
27 07000-12065 O-ring 1 15001-
28 04065-07225 Ring, Snap 1 15001-

Reference:H0210-001001A Page:H009002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012855
22
21
19
20

15

20
19
21
22

2
5 14
3
4
3
11
1
7 17
6
8
9
13
12
23
24
18

10 16

Reference:H0210-001002 Page:H009003

PC78US-8 S/N 15001-UP


Hydraulic Pump, Piston Pump (2/4) (#15001-15940)
Index Code Part Number Description Qty Serial No.
A2 708-3T-00281 Pump Assembly 1 15488-15940
708-3T-00280 Pump Assembly 1 15001-15487
708-3T-04210 Block Assembly 1 15001-@
1 C1 Cylinder Block 1 15001-@
2 C1 Plate, Valve 1 15001-@
3 C2 (708-1W-23130) Seat 2 15001-@
4 C2 (708-3T-13150) Spring 1 15001-@
5 C2 (04065-04218) Ring, Snap 1 15001-@
6 C2 (708-3T-13351) Guide, Retainer 1 15001-@
7 C2 (708-3T-13360) Pin 3 15001-@
8 C2 (708-3T-13340) Retainer, Shoe 1 15001-@
9 C2 (708-3T-13312) Piston Subassembly 10 15001-@
708-3T-04220 Flange Assembly 1 15001-15940
10 C1 Flange 1 15001-15940
11 C1 Plug, Stocking 1 15001-15940
12 C2 (708-3T-13421) Ball 2 15001-15940
13 C2 (708-3T-13412) Cam, Rocker 1 15001-@
14 C2 (708-3T-13451) Stud 1 15001-@
15 C2 (04020-01024) Pin, Dowel 1 15001-@
16 01252-61235 Bolt, Hexagon Socket Head 8 15001-@
17 07000-B2012 O-ring 1 15001-@
18 708-7T-51210 O-ring 1 15001-@
19 708-3T-14222 Plug 2 15001-15940
20 07000-12010 O-ring 2 15001-@
21 01643-51232 Washer 2 15001-@
22 01582-11210 Nut 2 15001-@
23 C2 (708-3T-14114) Piston Subassembly 2 15001-15940
24 C2 (708-3T-14120) Spring 2 15001-@

Reference:H0210-001002 Page:H009003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY015763
24
23
21
22

17

22
21
23
24

2
5 16
3
4
3
1
7 19 11
6
8
9
12
15
14
25
26
20
13

10 18

Reference:H0210-001002A Page:H009004

PC78US-8 S/N 15001-UP


Hydraulic Pump, Piston Pump (2/4) (#15941-)
Index Code Part Number Description Qty Serial No.
708-3T-00283 Pump Assembly 1 15941-
708-3T-01142 Pump Subassembly 1 15941-
708-3T-04210 Block Assembly 1 15001-
1 C1 Cylinder Block 1 15001-
2 C1 Plate, Valve 1 15001-
3 C2 (708-1W-23130) Seat 2 15001-
4 C2 (708-3T-13150) Spring 1 15001-
5 C2 (04065-04218) Ring, Snap 1 15001-
6 C2 (708-3T-13351) Guide, Retainer 1 15001-
7 C2 (708-3T-13360) Pin 3 15001-
8 C2 (708-3T-13340) Retainer, Shoe 1 15001-
9 C2 (708-3T-13312) Piston Subassembly 10 15001-
708-3T-04230 Flange Assembly 1 15941-
10 C1 Flange 1 15941-
11 C1 Plug, Stocking 2 15941-
12 C1 Sleeve 1 15941-
13 C1 Ring 1 15941-
14 C2 (708-1U-13461) Ball, Retainer 2 15941-
15 C2 (708-3T-13412) Cam, Rocker 1 15001-
16 C2 (708-3T-13451) Stud 1 15001-
17 C2 (04020-01024) Pin, Dowel 1 15001-
18 01252-61235 Bolt, Hexagon Socket Head 8 15001-
19 07000-B2012 O-ring 1 15001-
20 708-7T-51210 O-ring 1 15001-
21 708-3T-14130 Plug 2 15941-
22 07000-12010 O-ring 2 15001-
23 01643-51232 Washer 2 15001-
24 01582-11210 Nut 2 15001-
25 C2 (708-3T-14190) Piston 2 15941-
26 C2 (708-3T-14120) Spring 2 15001-
Reference:H0210-001002A Page:H009004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY022708

27
35
24
26 32
25
7 30 34
28 1
8 2
9 29
6 37
5
4
5 36 32
3 2 33
2
39
23
38
2 22
21

40
15 10
14 11
18 12
16 13
17 31 19
20

Reference:H0210-001003 Page:H009005

PC78US-8 S/N 15001-UP


Hydraulic Pump, Piston Pump (3/4) (#15001-)
Index Code Part Number Description Qty Serial No.
708-3T-00283 Pump Assembly 1 15941-
C2 (708-3T-03281) Valve Assembly 1 15941-
C2 (708-3T-03280) Valve Assembly 1 15001-15940
708-3T-04360 Body Assembly 1 15001-
1 C1 Body 1 15001-
2 C1 Plug 16 15001-
C2 (708-3T-04320) Piston Subassembly 1 15001-
3 C1 Piston 1 15001-
4 C1 Sleeve 1 15001-
5 C2 (708-1S-15390) Seal 3 15001-
C2 (708-3T-04340) Piston Subassembly 1 15001-
6 C1 Piston 1 15001-
7 C1 Plug 1 15001-
8 C2 (708-1S-15390) Seal 1 15001-
9 C2 (07002-11623) O-ring 1 15001-
10 C2 (708-3T-15280) Spool 1 15001-
11 C2 (708-3T-15310) Seat 1 15001-
12 C2 (708-3T-15420) Spring 1 15001-
13 C2 (708-3T-15290) Retainer 1 15001-
14 C2 (708-3T-15250) Plug 1 15001-
15 C2 (07000-11006) O-ring 1 15001-
16 C2 (01583-11207) Nut 1 15001-
17 C2 (708-3T-15260) Lever 1 15001-
18 C2 (708-1S-15280) Spacer 1 15001-
19 C2 (07002-11623) O-ring 1 15001-
20 C2 (708-1S-15290) Plug 1 15001-
21 C2 (708-3T-15560) Plug 1 15001-
22 C2 (07002-11223) O-ring 1 15001-
23 C2 (708-3T-03711) Spool Subassembly 1 15001-
24 C2 (708-3T-15521) Plug 1 15001-
Reference:H0210-001003 Page:H009005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hydraulic Pump, Piston Pump (3/4) (#15001-)
Index Code Part Number Description Qty Serial No.
25 C2 (07000-11008) O-ring 1 15001-
26 C2 (07001-01008) Ring, Back-up 1 15001-
27 C2 (01583-51408) Nut 1 15001-
28 C2 (708-3T-15530) Spring 1 15001-
29 C2 (708-1S-15350) Seat 1 15001-
30 C2 (708-1S-15360) Seat 1 15001-
31 C2 (708-3T-15811) Orifice 1 15001-
32 702-21-60700 Valve, Pilot 1 15941-
702-21-57400 Valve, Pilot 1 15001-15940
33 700-80-61260 O-ring 1 15001-
34 723-11-19960 O-ring 1 15001-
35 702-21-54180 Screw 2 15001-
36 702-16-55610 O-ring 2 15941-
37 01252-60635 Bolt, Hexagon Socket Head 2 15001-
38 708-8E-16150 Plug 1 15001-
39 07002-11023 O-ring 1 15001-
40 20B-27-11210 Bleeder 1 15001-

Reference:H0210-001003 Page:H009005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012845
6
5
17

14
16
2
7
11 15
10 1
9
19 4
3
18

12
13 3
8

20
21
22
23

Reference:H0210-001004 Page:H009006

PC78US-8 S/N 15001-UP


Hydraulic Pump, Piston Pump (4/4) (#15001-)
Index Code Part Number Description Qty Serial No.
708-3T-00283 Pump Assembly 1 15941-
1 708-2L-25480 Filter 4 15001-
2 708-2L-25490 O-ring 4 15001-
3 04020-00616 Pin, Dowel 2 15001-
4 07000-11008 O-ring 3 15001-
5 01252-60855 Bolt, Hexagon Socket Head 3 15001-
6 01252-60840 Bolt, Hexagon Socket Head 1 15001-
7 07000-13042 O-ring 1 15001-
8 708-3T-04520 Pump Assembly 1 15001-
9 708-1T-19230 Ring 1 15001-
10 07000-12014 O-ring 1 15001-
11 07000-12060 O-ring 1 15001-
12 01010-80830 Bolt 4 15001-
13 01643-30823 Washer 4 15001-
708-3T-04160 Plug Assembly 2 15001-
14 708-3S-15810 Plug 1 15001-
15 07000-11003 O-ring 1 15001-
16 07001-01003 Ring, Back-up 1 15001-
17 708-3S-15820 Nut 2 15001-
18 708-1T-19210 Coupling 1 15001-
19 700-30-63140 Ring, Snap 1 15001-
20 708-3T-12170 Coupling 1 15001-
21 04065-03212 Ring, Snap 1 15001-
22 708-3T-12180 Retainer 1 15001-
23 01010-80825 Bolt 1 15001-

Reference:H0210-001004 Page:H009006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hydraulic Pump, With Blade
FIG. Name FIG. No.
Hydraulic Pump, Piston Pump (1/4) (#15001-15940) H0210-002001
Hydraulic Pump, Piston Pump (1/4) (#15941-) H0210-002001A
Hydraulic Pump, Piston Pump (2/4) (#15001-15940) H0210-002002
Hydraulic Pump, Piston Pump (2/4) (#15941-) H0210-002002A
Hydraulic Pump, Piston Pump (3/4) H0210-002003
Hydraulic Pump, Piston Pump (4/4) H0210-002004

Reference:X22-1035731 Page:H010000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY010789

7
10
8
11
2 9 2 12
2
12
11
17
2 18
2 5
18
23

17 12
11
4 1
6
15 3
16
13
14

19

20
21
22
24
26
25
27

Reference:H0210-002001 Page:H010001

PC78US-8 S/N 15001-UP


Hydraulic Pump, Piston Pump (1/4) (#15001-15940)
Index Code Part Number Description Qty Serial No.
A2 708-3T-00271 Pump Assembly 1 15488-15940
708-3T-00270 Pump Assembly 1 15001-15487
708-3T-01250 Pump Subassembly 1 15488-15940
708-3T-01231 Pump Subassembly 1 15001-15487
708-3T-04181 Case Assembly 1 15001-15940
1 C1 Case, Pump 1 15001-15940
2 C1 Plug, Stocking 18 15001-15940
3 07044-12412 Plug 1 15001-@
4 07002-62434 O-ring 1 15001-@
5 04530-11018 Bolt, Eye 1 15001-@
6 C2 (720-68-19610) Pin 1 15001-@
7 C2 (708-3T-14151) Plug 2 15001-@
8 C2 (708-3T-14170) Ball 2 15001-@
9 C2 (708-3T-14160) Seat 2 15001-@
10 07002-61023 O-ring 2 15001-@
11 708-8E-16150 Plug 3 15001-@
12 07002-61023 O-ring 3 15001-@
708-3T-04190 Plug Subassembly 1 15001-@
13 C1 Plug 1 15001-@
14 C1 Plug, Stocking 1 15001-@
15 C1 Seal 2 15001-@
16 07002-11223 O-ring 1 15001-@
17 708-1L-25210 Plug 2 15001-@
18 07002-11423 O-ring 2 15001-@
19 C2 (708-3T-12240) Shaft 1 15488-@
20 C2 (708-1W-22140) Bearing 1 15001-@
21 C2 (708-23-05011) Washer Kit 1 15001-@
C1 Washer, T=2.6mm 1 15001-@
C1 Washer, T=2.7mm 1 15001-@
C1 Washer, T=2.8mm 1 15001-@
Reference:H0210-002001 Page:H010001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hydraulic Pump, Piston Pump (1/4) (#15001-15940)
Index Code Part Number Description Qty Serial No.
21 C1 Washer, T=2.5mm 1 15001-@
22 C2 (708-23-12840) Ring, Snap 1 15001-@
23 C2 (708-1W-22320) Bearing 1 15001-@
24 708-8D-12221 Seal, Oil 1 15001-@
25 708-3T-12210 Case 1 15001-@
26 07000-12065 O-ring 1 15001-@
27 04065-07225 Ring, Snap 1 15001-@

Reference:H0210-002001 Page:H010001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY015762
8
11
9
12
10 2 13
2 2
13
12 3
18
2 19
2
19 6
24

18 13
12
5 1
7
16
17 4
14
15

20

21
22
23
25
27
26
28

Reference:H0210-002001A Page:H010002

PC78US-8 S/N 15001-UP


Hydraulic Pump, Piston Pump (1/4) (#15941-)
Index Code Part Number Description Qty Serial No.
708-3T-00273 Pump Assembly 1 15941-
708-3T-01252 Pump Subassembly 1 15941-
708-3T-04240 Case Assembly 1 15941-
1 C1 Case 1 15941-
2 C1 Plug, Stocking 19 15941-
3 C1 Orifice 1 15941-
4 07044-12412 Plug 1 15001-
5 07002-62434 O-ring 1 15001-
6 04530-11018 Bolt, Eye 1 15001-
7 C2 (720-68-19610) Pin 1 15001-
8 C2 (708-3T-14151) Plug 2 15001-
9 C2 (708-3T-14170) Ball 2 15001-
10 C2 (708-3T-14160) Seat 2 15001-
11 07002-61023 O-ring 2 15001-
12 708-8E-16150 Plug 3 15001-
13 07002-61023 O-ring 3 15001-
708-3T-04190 Plug Subassembly 1 15001-
14 C1 Plug 1 15001-
15 C1 Plug, Stocking 1 15001-
16 C1 Seal 2 15001-
17 07002-11223 O-ring 1 15001-
18 708-1L-25210 Plug 2 15001-
19 07002-11423 O-ring 2 15001-
20 C2 (708-3T-12240) Shaft 1 15488-
21 C2 (708-1W-22140) Bearing 1 15001-
22 C2 (708-23-05011) Washer Kit 1 15001-
C1 Washer, T=2.6mm 1 15001-
C1 Washer, T=2.7mm 1 15001-
C1 Washer, T=2.8mm 1 15001-
C1 Washer, T=2.5mm 1 15001-
Reference:H0210-002001A Page:H010002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hydraulic Pump, Piston Pump (1/4) (#15941-)
Index Code Part Number Description Qty Serial No.
23 C2 (708-23-12840) Ring, Snap 1 15001-
24 C2 (708-1W-22320) Bearing 1 15001-
25 708-8D-12221 Seal, Oil 1 15001-
26 708-3T-12210 Case 1 15001-
27 07000-12065 O-ring 1 15001-
28 04065-07225 Ring, Snap 1 15001-

Reference:H0210-002001A Page:H010002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY010790

22
21
19
20

15

20
19
21
22

2
5 14
3
4
3
1 11
7 17
6
8
9
13
12
23
24
18

10 16

Reference:H0210-002002 Page:H010003

PC78US-8 S/N 15001-UP


Hydraulic Pump, Piston Pump (2/4) (#15001-15940)
Index Code Part Number Description Qty Serial No.
A2 708-3T-00271 Pump Assembly 1 15488-15940
708-3T-00270 Pump Assembly 1 15001-15487
708-3T-04210 Block Assembly 1 15001-@
1 C1 Cylinder Block 1 15001-@
2 C1 Plate, Valve 1 15001-@
3 C2 (708-1W-23130) Seat 2 15001-@
4 C2 (708-3T-13150) Spring 1 15001-@
5 C2 (04065-04218) Ring, Snap 1 15001-@
6 C2 (708-3T-13351) Guide, Retainer 1 15001-@
7 C2 (708-3T-13360) Pin 3 15001-@
8 C2 (708-3T-13340) Retainer, Shoe 1 15001-@
9 C2 (708-3T-13312) Piston Subassembly 10 15001-@
708-3T-04220 Flange Assembly 1 15001-15940
10 C1 Flange 1 15001-15940
11 C1 Plug, Stocking 1 15001-15940
12 C2 (708-3T-13421) Ball 2 15001-15940
13 C2 (708-3T-13412) Cam, Rocker 1 15001-@
14 C2 (708-3T-13451) Stud 1 15001-@
15 C2 (04020-01024) Pin, Dowel 1 15001-@
16 01252-61235 Bolt, Hexagon Socket Head 8 15001-@
17 07000-B2012 O-ring 1 15001-@
18 708-7T-51210 O-ring 1 15001-@
19 708-3T-14222 Plug 2 15001-15940
20 07000-12010 O-ring 2 15001-@
21 01643-51232 Washer 2 15001-@
22 01582-11210 Nut 2 15001-@
23 C2 (708-3T-14114) Piston Subassembly 2 15001-15940
24 C2 (708-3T-14120) Spring 2 15001-@

Reference:H0210-002002 Page:H010003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY015763
24
23
21
22

17

22
21
23
24

2
5 16
3
4
3
1
7 19 11
6
8
9
12
15
14
25
26
20
13

10 18

Reference:H0210-002002A Page:H010004

PC78US-8 S/N 15001-UP


Hydraulic Pump, Piston Pump (2/4) (#15941-)
Index Code Part Number Description Qty Serial No.
708-3T-00273 Pump Assembly 1 15941-
708-3T-01252 Pump Subassembly 1 15941-
708-3T-04210 Block Assembly 1 15001-
1 C1 Cylinder Block 1 15001-
2 C1 Plate, Valve 1 15001-
3 C2 (708-1W-23130) Seat 2 15001-
4 C2 (708-3T-13150) Spring 1 15001-
5 C2 (04065-04218) Ring, Snap 1 15001-
6 C2 (708-3T-13351) Guide, Retainer 1 15001-
7 C2 (708-3T-13360) Pin 3 15001-
8 C2 (708-3T-13340) Retainer, Shoe 1 15001-
9 C2 (708-3T-13312) Piston Subassembly 10 15001-
708-3T-04230 Flange Assembly 1 15941-
10 C1 Flange 1 15941-
11 C1 Plug, Stocking 2 15941-
12 C1 Sleeve 1 15941-
13 C1 Ring 1 15941-
14 C2 (708-1U-13461) Ball, Retainer 2 15941-
15 C2 (708-3T-13412) Cam, Rocker 1 15001-
16 C2 (708-3T-13451) Stud 1 15001-
17 C2 (04020-01024) Pin, Dowel 1 15001-
18 01252-61235 Bolt, Hexagon Socket Head 8 15001-
19 07000-B2012 O-ring 1 15001-
20 708-7T-51210 O-ring 1 15001-
21 708-3T-14130 Plug 2 15941-
22 07000-12010 O-ring 2 15001-
23 01643-51232 Washer 2 15001-
24 01582-11210 Nut 2 15001-
25 C2 (708-3T-14190) Piston 2 15941-
26 C2 (708-3T-14120) Spring 2 15001-
Reference:H0210-002002A Page:H010004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY022708

27
35
24
26 32
25
7 30 34
28 1
8 2
9 29
6 37
5
4
5 36 32
3 2 33
2
39
23
38
2 22
21

40
15 10
14 11
18 12
16 13
17 31 19
20

Reference:H0210-002003 Page:H010005

PC78US-8 S/N 15001-UP


Hydraulic Pump, Piston Pump (3/4) (#15001-)
Index Code Part Number Description Qty Serial No.
708-3T-00273 Pump Assembly 1 15941-
708-3T-03271 Valve Assembly 1 15941-
708-3T-03270 Valve Assembly, Servo 1 15001-15940
708-3T-04360 Body Assembly 1 15001-
1 C1 Body 1 15001-
2 C1 Plug 16 15001-
C2 (708-3T-04320) Piston Subassembly 1 15001-
3 C1 Piston 1 15001-
4 C1 Sleeve 1 15001-
5 C2 (708-1S-15390) Seal 3 15001-
C2 (708-3T-04340) Piston Subassembly 1 15001-
6 C1 Piston 1 15001-
7 C1 Plug 1 15001-
8 C2 (708-1S-15390) Seal 1 15001-
9 C2 (07002-11623) O-ring 1 15001-
10 C2 (708-3T-15280) Spool 1 15001-
11 C2 (708-3T-15310) Seat 1 15001-
12 C2 (708-3T-15410) Spring 1 15001-
13 C2 (708-3T-15290) Retainer 1 15001-
14 C2 (708-3T-15250) Plug 1 15001-
15 C2 (07000-11006) O-ring 1 15001-
16 C2 (01583-11207) Nut 1 15001-
17 C2 (708-3T-15260) Lever 1 15001-
18 C2 (708-1S-15280) Spacer 1 15001-
19 C2 (07002-11623) O-ring 1 15001-
20 C2 (708-1S-15290) Plug 1 15001-
21 C2 (708-3T-15560) Plug 1 15001-
22 C2 (07002-11223) O-ring 1 15001-
23 C2 (708-3T-03711) Spool Subassembly 1 15001-
24 C2 (708-3T-15521) Plug 1 15001-
Reference:H0210-002003 Page:H010005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hydraulic Pump, Piston Pump (3/4) (#15001-)
Index Code Part Number Description Qty Serial No.
25 C2 (07000-11008) O-ring 1 15001-
26 C2 (07001-01008) Ring, Back-up 1 15001-
27 C2 (01583-51408) Nut 1 15001-
28 C2 (708-3T-15530) Spring 1 15001-
29 C2 (708-1S-15350) Seat 1 15001-
30 C2 (708-1S-15360) Seat 1 15001-
31 C2 (708-3T-15811) Orifice 1 15001-
32 702-21-60700 Valve, Pilot 1 15941-
702-21-57400 Valve, Pilot 1 15001-15940
33 700-80-61260 O-ring 1 15001-
34 723-11-19960 O-ring 1 15001-
35 702-21-54180 Screw 2 15001-
36 702-16-55610 O-ring 2 15941-
702-21-54910 O-ring 2 15001-15940
37 01252-60635 Bolt, Hexagon Socket Head 2 15001-
38 708-8E-16150 Plug 1 15001-
39 07002-11023 O-ring 1 15001-
40 20B-27-11210 Bleeder 1 15001-

Reference:H0210-002003 Page:H010005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY010652
5
6

16

13
12
15
7
14 2 2

1 1
17
18 3 4
11
8

3
9
10

19
20
21
22

Reference:H0210-002004 Page:H010006

PC78US-8 S/N 15001-UP


Hydraulic Pump, Piston Pump (4/4) (#15001-)
Index Code Part Number Description Qty Serial No.
708-3T-00273 Pump Assembly 1 15941-
1 708-2L-25480 Filter 4 15001-
2 708-2L-25490 O-ring 4 15001-
3 04020-00616 Pin, Dowel 2 15001-
4 07000-11008 O-ring 3 15001-
5 01252-60855 Bolt, Hexagon Socket Head 3 15001-
6 01252-60840 Bolt, Hexagon Socket Head 1 15001-
7 07000-13042 O-ring 1 15001-
8 07000-11008 O-ring 2 15001-
9 07372-21030 Bolt 2 15001-
10 01643-31032 Washer 2 15001-
11 07000-12050 O-ring 1 15001-
12 708-3T-04620 Pump Assembly 1 15001-
708-3T-04160 Plug Assembly 2 15001-
13 708-3S-15810 Plug 1 15001-
14 07000-11003 O-ring 1 15001-
15 07001-01003 Ring, Back-up 1 15001-
16 708-3S-15820 Nut 2 15001-
17 708-1W-28150 Coupling 1 15001-
18 04065-02012 Ring, Snap 1 15001-
19 708-3T-12170 Coupling 1 15001-
20 04065-03212 Ring, Snap 1 15001-
21 708-3T-12180 Retainer 1 15001-
22 01010-80825 Bolt 1 15001-

Reference:H0210-002004 Page:H010006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Suction Piping, Without Blade
FIG. Name FIG. No.
Suction Piping H0311-002001

Reference:X22-1036061 Page:H011000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001358

2
12

1
4

11 3

8 10 6

Reference:H0311-002001 Page:H011001

PC78US-8 S/N 15001-UP


Suction Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-52311 Elbow 1 15001-
2 07000-12070 O-ring 1 15001-
3 01010-81240 Bolt 2 15001-
4 01643-31232 Washer 2 15001-
5 01011-81240 Bolt 2 15001-
6 01643-31232 Washer 2 15001-
7 21W-62-48331 Hose 1 15001-
8 07289-00095 Clamp 2 15001-
9 07289-00095 Clamp 2 15001-
10 07040-12412 Plug 1 15001-
11 07002-12434 O-ring 1 15001-
12 7861-93-3320 Sensor, Temperature 1 15001-

Reference:H0311-002001 Page:H011001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Suction Piping, With Blade
FIG. Name FIG. No.
Suction Piping H0311-001001

Reference:X22-1030191 Page:H012000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000617

15

14
17
13 20
16
19

18
2

13

12 1

4
11
3
8 10 6

Reference:H0311-001001 Page:H012001

PC78US-8 S/N 15001-UP


Suction Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-53311 Elbow 1 15001-
2 07000-12070 O-ring 1 15001-
3 01010-81240 Bolt 2 15001-
4 01643-31232 Washer 2 15001-
5 01011-81240 Bolt 2 15001-
6 01643-31232 Washer 2 15001-
7 21W-62-48331 Hose 1 15001-
8 07289-00095 Clamp 2 15001-
9 07289-00095 Clamp 2 15001-
10 07040-12412 Plug 1 15001-
11 07002-12434 O-ring 1 15001-
12 21W-62-53320 Hose 1 15001-
13 07289-00055 Clamp 2 15001-
14 21W-62-43260 Elbow 1 15001-
15 07000-13032 O-ring 1 15001-
16 01010-80830 Bolt 2 15001-
17 01643-30823 Washer 2 15001-
18 01010-80850 Bolt 2 15001-
19 01643-30823 Washer 2 15001-
20 7861-93-3320 Sensor, Temperature, Oil, Suction 1 15001-

Reference:H0311-001001 Page:H012001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Delivery Piping, Without Blade
FIG. Name FIG. No.
Delivery Piping H0312-002001

Reference:X22-1036081 Page:H013000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001359
19
17
21
16

20 30
15 28
18 32 26 29
33
27
23
31
22 25
5
24
3
7
1 6 2

4
12
10
14
8 13 9

11

Reference:H0312-002001 Page:H013001

PC78US-8 S/N 15001-UP


Delivery Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 02782-10628 Elbow 1 15001-
2 21W-62-43510 Hose 1 15001-
3 02781-00628 Union 1 15001-
4 07002-12434 O-ring 1 15001-
5 07002-12434 O-ring 1 15001-
6 02896-11018 O-ring 1 15001-
7 02896-11018 O-ring 1 15001-
8 02782-10630 Elbow 1 15001-
9 21W-62-43521 Hose 1 15001-
10 02781-00628 Union 1 15001-
11 07002-12434 O-ring 1 15001-
12 07002-12434 O-ring 1 15001-
13 02896-11018 O-ring 1 15001-
14 02896-11018 O-ring 1 15001-
15 02781-0021D Union 1 15001-
16 02766-002A7 Hose 1 15001-
17 11Y-62-12240 Elbow 1 15001-
18 07002-11423 O-ring 1 15001-
19 07002-11423 O-ring 1 15001-
20 02896-11008 O-ring 1 15001-
21 02896-11008 O-ring 1 15001-
22 22P-62-13800 Elbow Assembly 1 15001-
23 21W-62-44920 Bleeder 1 15001-
24 07040-11007 Plug 1 15001-
25 07002-11023 O-ring 1 15001-
26 21W-62-43551 Hose 1 15001-
27 21W-62-43950 Elbow Assembly 1 15001-
28 203-62-58880 Adapter 1 15001-
29 07002-11423 O-ring 1 15001-
30 07002-11423 O-ring 1 15001-
Reference:H0312-002001 Page:H013001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Delivery Piping (#15001-)
Index Code Part Number Description Qty Serial No.
31 07002-11423 O-ring 1 15001-
32 02896-11009 O-ring 1 15001-
33 02896-11009 O-ring 1 15001-

Reference:H0312-002001 Page:H013001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Delivery Piping, With Blade
FIG. Name FIG. No.
Delivery Piping H0312-001001

Reference:X22-1030200 Page:H014000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000618
19
17
21
16

20 30
15 28
18 32 26 29
33
27
23
31
22 25
5
24
3
7
1 6 2

4
12
10
14
8 13 9

45
11
36 46

37
42 41
38
44

43
39 40
34
35

Reference:H0312-001001 Page:H014001

PC78US-8 S/N 15001-UP


Delivery Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 02782-10628 Elbow 1 15001-
2 21W-62-43510 Hose 1 15001-
3 02781-00628 Union 1 15001-
4 07002-12434 O-ring 1 15001-
5 07002-12434 O-ring 1 15001-
6 02896-11018 O-ring 1 15001-
7 02896-11018 O-ring 1 15001-
8 02782-10630 Elbow 1 15001-
9 21W-62-43521 Hose 1 15001-
10 02781-00628 Union 1 15001-
11 07002-12434 O-ring 1 15001-
12 07002-12434 O-ring 1 15001-
13 02896-11018 O-ring 1 15001-
14 02896-11018 O-ring 1 15001-
15 02781-0021D Union 1 15001-
16 02766-002A7 Hose 1 15001-
17 11Y-62-12240 Elbow 1 15001-
18 07002-11423 O-ring 1 15001-
19 07002-11423 O-ring 1 15001-
20 02896-11008 O-ring 1 15001-
21 02896-11008 O-ring 1 15001-
22 22P-62-13800 Elbow Assembly 1 15001-
23 21W-62-44920 Bleeder 1 15001-
24 07040-11007 Plug 1 15001-
25 07002-11023 O-ring 1 15001-
26 21W-62-43551 Hose 1 15001-
27 21W-62-43950 Elbow Assembly 1 15001-
28 203-62-58880 Adapter 1 15001-
29 07002-11423 O-ring 1 15001-
30 07002-11423 O-ring 1 15001-
Reference:H0312-001001 Page:H014001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Delivery Piping (#15001-)
Index Code Part Number Description Qty Serial No.
31 07002-11423 O-ring 1 15001-
32 02896-11009 O-ring 1 15001-
33 02896-11009 O-ring 1 15001-
34 21W-62-43160 Block 1 15001-
35 07000-13030 O-ring 1 15001-
36 01010-80835 Bolt 4 15001-
37 01643-30823 Washer 4 15001-
38 02781-00422 Union 1 15001-
39 07002-12034 O-ring 1 15001-
40 21W-62-43531 Hose 1 15001-
41 21W-62-42970 Tee 1 15001-
42 07002-12434 O-ring 1 15001-
43 02896-11012 O-ring 1 15001-
44 02896-11012 O-ring 1 15001-
45 07040-11007 Plug 1 15001-
46 07002-11023 O-ring 1 15001-

Reference:H0312-001001 Page:H014001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Delivery Piping, With Blade, For Extra Bad Fuel and Poor Fuel Specification, Water+Dust, Additional Filter
FIG. Name FIG. No.
Delivery Piping H0312-003001

Reference:X22-1099610 Page:H015000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA003873
14
13
15
12

15 23
11 22
14 24 20 23
24
21
17
23
16 19
4
18
3
5
1 5 2

4
9
8
10
6 10 7

9
27 32
28 33
36
29
34 35

34
30
25
31
26

Reference:H0312-003001 Page:H015001

PC78US-8 S/N 15001-UP


Delivery Piping (#15506-)
Index Code Part Number Description Qty Serial No.
1 02782-10628 Elbow 1 15506-
2 21W-62-43510 Hose 1 15506-
3 02781-00628 Union 1 15506-
4 07002-12434 O-ring 2 15506-
5 02896-11018 O-ring 2 15506-
6 02782-10630 Elbow 1 15506-
7 21W-62-43521 Hose 1 15506-
8 02781-00628 Union 1 15506-
9 07002-12434 O-ring 2 15506-
10 02896-11018 O-ring 2 15506-
11 02781-0021D Union 1 15506-
12 02766-002A7 Hose 1 15506-
13 11Y-62-12240 Elbow 1 15506-
14 07002-11423 O-ring 2 15506-
15 02896-11008 O-ring 2 15506-
16 22P-62-13800 Elbow Assembly 1 15506-
17 21W-62-44920 Bleeder 1 15506-
18 07040-11007 Plug 1 15506-
19 07002-11023 O-ring 1 15506-
20 21W-62-43551 Hose 1 15506-
21 21W-62-43950 Elbow Assembly 1 15506-
22 203-62-58880 Adapter 1 15506-
23 07002-11423 O-ring 3 15506-
24 02896-11009 O-ring 2 15506-
25 21W-62-43160 Block 1 15506-
26 07000-13030 O-ring 1 15506-
27 01010-80835 Bolt 4 15506-
28 01643-30823 Washer 4 15506-
29 02781-00422 Union 1 15506-
30 07002-12034 O-ring 1 15506-
Reference:H0312-003001 Page:H015001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Delivery Piping (#15506-)
Index Code Part Number Description Qty Serial No.
31 02765-004A4 Hose, Face Seal Type 1 15506-
32 21W-62-51890 Elbow 1 15506-
33 07002-12434 O-ring 1 15506-
34 02896-11012 O-ring 2 15506-
35 07040-11007 Plug 1 15506-
36 07002-11023 O-ring 1 15506-

Reference:H0312-003001 Page:H015001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Oil Cooler Piping, Without 1-Additional Actuator Piping
FIG. Name FIG. No.
Oil Cooler Piping H0320-001001

Reference:X22-1036101 Page:H016000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001363

2
1
4
3
5
28 7
9
27 29 6 8
14
30
24 22 15 13
25 10 6
23
12
26 30 11
21
18

21 12 10
11 21 16

17
17 31
23 20
22 33 19
32 16

Reference:H0320-001001 Page:H016001

PC78US-8 S/N 15001-UP


Oil Cooler Piping (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 21W-62-43111 Joint 1 15001-15739
2 07002-13334 O-ring 1 15001-15739
3 21W-62-42640 Elbow 1 15001-15739
4 07002-13334 O-ring 1 15001-15739
5 207-62-64740 O-ring 1 15001-15739
6 21W-62-52511 Hose 1 15001-15739
7 07000-13032 O-ring 1 15001-15739
8 07372-21035 Bolt 2 15001-15739
9 01643-51032 Washer 2 15001-15739
10 155-61-15350 Clip 2 15001-15739
11 01010-81225 Bolt 2 15001-15739
12 01643-31232 Washer 2 15001-15739
13 22P-62-11351 Bracket 1 15001-15739
14 01010-80820 Bolt 2 15001-15739
15 01643-30823 Washer 2 15001-15739
16 22P-62-11330 Grommet 2 15001-15739
17 21W-62-52521 Hose 1 15001-15739
18 07000-13032 O-ring 1 15001-15739
19 01580-11008 Nut 2 15001-15739
20 01643-51032 Washer 2 15001-15739
21 155-61-15350 Clip 3 15001-15739
22 01010-81225 Bolt 2 15001-15739
23 01643-31232 Washer 2 15001-15739
24 01010-81280 Bolt 1 15001-15739
25 01643-31232 Washer 1 15001-15739
26 144-54-51280 Collar 1 15001-15739
27 21W-62-42640 Elbow 1 15001-15739
28 07002-13334 O-ring 1 15001-15739
29 207-62-64740 O-ring 1 15001-15739
30 21W-62-22180 Grommet 2 15001-15739
Reference:H0320-001001 Page:H016001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Oil Cooler Piping (#15001-15739)
Index Code Part Number Description Qty Serial No.
31 21W-62-52550 Bracket 1 15001-15739
32 01010-81225 Bolt 2 15001-15739
33 01643-31232 Washer 2 15001-15739

Reference:H0320-001001 Page:H016001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Oil Cooler Piping, Without 1-Additional Actuator Piping
FIG. Name FIG. No.
Oil Cooler Piping H0320-004001

Reference:X22-1036102 Page:H017000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014810

2
1
4
3
5
31 7
9
30 32 6 8
17
33
27 25 18 16
28 10 6
26
15
29 33 14
24
21

24 13 11
12 24 19

20
20 34
26 23
25 36 22
35 19

Reference:H0320-004001 Page:H017001

PC78US-8 S/N 15001-UP


Oil Cooler Piping (#15740-)
Index Code Part Number Description Qty Serial No.
1 21W-62-43111 Joint 1 15740-
2 07002-13334 O-ring 1 15740-
3 21W-62-42640 Elbow 1 15740-
4 07002-13334 O-ring 1 15740-
5 207-62-64740 O-ring 1 15740-
6 21W-62-52512 Hose 1 15740-
7 07000-13032 O-ring 1 15740-
8 01010-81035 Bolt 2 15740-
9 01643-31032 Washer 2 15740-
10 155-61-15350 Clip 1 15740-
11 155-61-15350 Clip 1 15740-
12 01010-81225 Bolt 1 15740-
13 01643-31232 Washer 1 15740-
14 01010-81225 Bolt 1 15740-
15 01643-31232 Washer 1 15740-
16 22P-62-11351 Bracket 1 15740-
17 01010-80820 Bolt 2 15740-
18 01643-30823 Washer 2 15740-
19 22P-62-11330 Grommet 2 15740-
20 21W-62-52521 Hose 1 15740-
21 07000-13032 O-ring 1 15740-
22 01580-11008 Nut 2 15740-
23 01643-31032 Washer 2 15740-
24 155-61-15350 Clip 3 15740-
25 01010-81225 Bolt 2 15740-
26 01643-31232 Washer 2 15740-
27 01010-81280 Bolt 1 15740-
28 01643-31232 Washer 1 15740-
29 144-54-51280 Collar 1 15740-
30 21W-62-42640 Elbow 1 15740-
Reference:H0320-004001 Page:H017001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Oil Cooler Piping (#15740-)
Index Code Part Number Description Qty Serial No.
31 07002-13334 O-ring 1 15740-
32 207-62-64740 O-ring 1 15740-
33 21W-62-22180 Grommet 2 15740-
34 21W-62-52550 Bracket 1 15740-
35 01010-81225 Bolt 2 15740-
36 01643-31232 Washer 2 15740-

Reference:H0320-004001 Page:H017001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Oil Cooler Piping, With 1-Additional Actuator Piping
FIG. Name FIG. No.
Oil Cooler Piping H0320-002001

Reference:X22-1038920 Page:H018000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001611

2
1

25 4
6
24 26 3 5

27 11
21 19 12 10
22 7 3
20
9
23 27 8
18
15

18 9 7
18 13
8
14
14 28
20 17
19 30 16
29 13

Reference:H0320-002001 Page:H018001

PC78US-8 S/N 15001-UP


Oil Cooler Piping (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 21W-62-43111 Joint 1 15001-15739
2 07002-13334 O-ring 1 15001-15739
3 21W-62-52511 Hose 1 15001-15739
4 07000-13032 O-ring 1 15001-15739
5 07372-21035 Bolt 2 15001-15739
6 01643-51032 Washer 2 15001-15739
7 155-61-15350 Clip 2 15001-15739
8 01010-81225 Bolt 2 15001-15739
9 01643-31232 Washer 2 15001-15739
10 22P-62-11351 Bracket 1 15001-15739
11 01010-80820 Bolt 2 15001-15739
12 01643-30823 Washer 2 15001-15739
13 22P-62-11330 Grommet 2 15001-15739
14 21W-62-52521 Hose 1 15001-15739
15 07000-13032 O-ring 1 15001-15739
16 01580-11008 Nut 2 15001-15739
17 01643-51032 Washer 2 15001-15739
18 155-61-15350 Clip 3 15001-15739
19 01010-81225 Bolt 2 15001-15739
20 01643-31232 Washer 2 15001-15739
21 01010-81280 Bolt 1 15001-15739
22 01643-31232 Washer 1 15001-15739
23 144-54-51280 Collar 1 15001-15739
24 21W-62-42640 Elbow 1 15001-15739
25 07002-13334 O-ring 1 15001-15739
26 207-62-64740 O-ring 1 15001-15739
27 21W-62-22180 Grommet 2 15001-15739
28 21W-62-52550 Bracket 1 15001-15739
29 01010-81225 Bolt 2 15001-15739
30 01643-31232 Washer 2 15001-15739
Reference:H0320-002001 Page:H018001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Oil Cooler Piping, With 1-Additional Actuator Piping
FIG. Name FIG. No.
Oil Cooler Piping H0320-005001

Reference:X22-1038921 Page:H019000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014811

2
1

28 4
6
27 29 3 5

30 14
24 22 15 13
25 7 3
23
12
26 30 11
21
18

21 10 8
21 16
9
17
17 31
23 20
22 33 19
32 16

Reference:H0320-005001 Page:H019001

PC78US-8 S/N 15001-UP


Oil Cooler Piping (#15740-)
Index Code Part Number Description Qty Serial No.
1 21W-62-43111 Joint 1 15740-
2 07002-13334 O-ring 1 15740-
3 21W-62-52512 Hose 1 15740-
4 07000-13032 O-ring 1 15740-
5 01010-81035 Bolt 2 15740-
6 01643-31032 Washer 2 15740-
7 155-61-15350 Clip 1 15740-
8 155-61-15350 Clip 1 15740-
9 01010-81225 Bolt 1 15740-
10 01643-31232 Washer 1 15740-
11 01010-81225 Bolt 1 15740-
12 01643-31232 Washer 1 15740-
13 22P-62-11351 Bracket 1 15740-
14 01010-80820 Bolt 2 15740-
15 01643-30823 Washer 2 15740-
16 22P-62-11330 Grommet 2 15740-
17 21W-62-52521 Hose 1 15740-
18 07000-13032 O-ring 1 15740-
19 01580-11008 Nut 2 15740-
20 01643-31032 Washer 2 15740-
21 155-61-15350 Clip 3 15740-
22 01010-81225 Bolt 2 15740-
23 01643-31232 Washer 2 15740-
24 01010-81280 Bolt 1 15740-
25 01643-31232 Washer 1 15740-
26 144-54-51280 Collar 1 15740-
27 21W-62-42640 Elbow 1 15740-
28 07002-13334 O-ring 1 15740-
29 207-62-64740 O-ring 1 15740-
30 21W-62-22180 Grommet 2 15740-
Reference:H0320-005001 Page:H019001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Oil Cooler Piping (#15740-)
Index Code Part Number Description Qty Serial No.
31 21W-62-52550 Bracket 1 15740-
32 01010-81225 Bolt 2 15740-
33 01643-31232 Washer 2 15740-

Reference:H0320-005001 Page:H019001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Return Piping, Without 1-Additional Actuator Piping
FIG. Name FIG. No.
Return Piping H0330-001001

Reference:X22-1036111 Page:H020000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001366
5

6 7
4 3

17
18
8 15
16

10
9 11 13
14
12

Reference:H0330-001001 Page:H020001

PC78US-8 S/N 15001-UP


Return Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-42481 Nipple 1 15001-
2 21W-62-52531 Hose 1 15001-
3 02781-00522 Union 1 15001-
4 07002-12434 O-ring 1 15001-
5 07002-12434 O-ring 1 15001-
6 02896-11015 O-ring 1 15001-
7 02896-11015 O-ring 1 15001-
8 426-04-31350 Hose 1 15001-
9 02782-10516 Elbow 1 15001-
10 07002-12034 O-ring 1 15001-
11 02896-11015 O-ring 1 15001-
12 21W-62-43240 Bracket 1 15001-
13 01010-81025 Bolt 2 15001-
14 01643-31032 Washer 2 15001-
15 07094-10417 Clamp 1 15001-
16 07095-00421 Cushion 1 15001-
17 01010-81240 Bolt 1 15001-
18 01643-31232 Washer 1 15001-

Reference:H0330-001001 Page:H020001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Return Piping, With 1-Additional Actuator Piping
FIG. Name FIG. No.
Return Piping H0330-002001

Reference:X22-1039760 Page:H021000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001370
5

3 6 7
4

16
17
8 14
15

10

9 11
18
12
13

Reference:H0330-002001 Page:H021001

PC78US-8 S/N 15001-UP


Return Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-42481 Nipple 1 15001-
2 21W-62-52531 Hose 1 15001-
3 02781-00522 Union 1 15001-
4 07002-12434 O-ring 1 15001-
5 07002-12434 O-ring 1 15001-
6 02896-11015 O-ring 1 15001-
7 02896-11015 O-ring 1 15001-
8 426-04-31350 Hose 1 15001-
9 02782-10516 Elbow 1 15001-
10 07002-12034 O-ring 1 15001-
11 02896-11015 O-ring 1 15001-
12 01010-81025 Bolt 2 15001-
13 01643-31032 Washer 2 15001-
14 07094-10417 Clamp 1 15001-
15 07095-00421 Cushion 1 15001-
16 01010-81240 Bolt 1 15001-
17 01643-31232 Washer 1 15001-
18 (21W-62-54270) Bracket
(21W-62-54270) Bracket

Reference:H0330-002001 Page:H021001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Drain Piping, Without Arm Crane, Overload Alarm
FIG. Name FIG. No.
Drain Piping, Fuel Tank to Swivel Joint and Solenoid Valve H0340-001001
Drain Piping, Fuel Tank to Piston Pump H0340-001002

Reference:X22-1036121 Page:H022000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001375

11
10
12
15
16
3 6
2
14 13
5 6
13
22 14
4
20 19 3
21
17 9
18
25
7
8 4

23 9 1
24
7
8
2

Reference:H0340-001001 Page:H022001

PC78US-8 S/N 15001-UP


Drain Piping, Fuel Tank to Swivel Joint and Solenoid Valve (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-51401 Hose Assembly 1 15001-
2 21W-62-51411 Hose, Black-Green 1 15001-
3 21W-62-51440 Hose, White-Green 1 15001-
4 21W-62-45920 Hose, Black-Blue 1 15001-
5 02760-00326 Hose, Face Seal Type 1 15001-
6 08034-20519 Band 2 15001-
7 02782-10315 Elbow 2 15001-
8 07002-12034 O-ring 2 15001-
9 02896-11009 O-ring 2 15001-
10 02781-0021D Union 1 15001-
11 07002-11423 O-ring 1 15001-
12 02896-11008 O-ring 1 15001-
13 21W-62-51460 Hose 1 15001-
14 23S-62-25850 Clip 2 15001-
15 01010-81220 Bolt 1 15001-
16 01643-31232 Washer 1 15001-
17 02782-10311 Elbow 1 15001-
18 07002-11423 O-ring 1 15001-
19 02896-11009 O-ring 1 15001-
20 02782-10210 Elbow 1 15001-
21 07002-11423 O-ring 1 15001-
22 02896-11008 O-ring 1 15001-
23 02782-10516 Elbow 1 15001-
24 07002-12034 O-ring 1 15001-
25 02896-11015 O-ring 1 15001-

Reference:H0340-001001 Page:H022001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001377

7
8 6
5
4
1 3

16

14 10
15 11 18

19
13
9
17
10
11
12

Reference:H0340-001002 Page:H022002

PC78US-8 S/N 15001-UP


Drain Piping, Fuel Tank to Piston Pump (#15001-)
Index Code Part Number Description Qty Serial No.
1 07002-12434 O-ring 1 15001-
2 21W-62-43642 Hose Assembly 1 15001-
3 08210-01801 Tube, Spiral 1 15001-
4 203-62-52210 Rubber 1 15001-
5 08034-20519 Band 2 15001-
6 02783-10628 Elbow 1 15001-
7 07002-62434 O-ring 1 15001-
8 02896-61018 O-ring 1 15001-
9 21W-62-54381 Plate 1 15001-
10 01010-81225 Bolt 2 15001-
11 01643-31232 Washer 2 15001-
12 23S-62-25850 Clip 1 15001-
13 144-54-51280 Collar 1 15001-
14 01010-81280 Bolt 1 15001-
15 01643-31232 Washer 1 15001-
16 08034-20536 Band 1 15001-
17 04434-51710 Clip 1 15001-
18 01010-81020 Bolt 1 15001-
19 01643-31032 Washer 1 15001-

Reference:H0340-001002 Page:H022002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Drain Piping, With Overload Alarm
FIG. Name FIG. No.
Drain Piping, Fuel Tank to Swivel Joint and Solenoid Valve H0340-004001
Drain Piping, PPC and Drain Piping H0340-004002

Reference:X22-1039770 Page:H023000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001568

10
9
26
11
13 25
14 33
30
2 5 34 29
31
1
39 12 28
4
12 5 27
24 28
20
3
18 17 41
19
15 36 42
16
23 40
37
21 38 2
8
22 35

6 3
7
1
33
34

32

Reference:H0340-004001 Page:H023001

PC78US-8 S/N 15001-UP


Drain Piping, Fuel Tank to Swivel Joint and Solenoid Valve (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-51411 Hose 1 15001-
21U-62-34720 Band, Black 1 15001-
21U-62-34750 Band, Blue 1 15001-
2 21W-62-51440 Hose 1 15001-
21U-62-34770 Band, White 1 15001-
21U-62-34730 Band, Green 1 15001-
3 21W-62-45920 Hose 1 15001-
21U-62-34770 Band, White 1 15001-
21U-62-34750 Band, Blue 1 15001-
4 02760-00326 Hose, Face Seal Type 1 15001-
5 08034-20519 Band 2 15001-
6 02782-10315 Elbow 1 15001-
7 07002-12034 O-ring 1 15001-
8 02896-11009 O-ring 1 15001-
9 02781-0021D Union 1 15001-
10 07002-11423 O-ring 1 15001-
11 02896-11008 O-ring 1 15001-
12 21W-62-51460 Hose 1 15001-
13 01010-81220 Bolt 1 15001-
14 01643-31232 Washer 1 15001-
15 02782-10311 Elbow 1 15001-
16 07002-11423 O-ring 1 15001-
17 02896-11009 O-ring 1 15001-
18 02782-10210 Elbow 1 15001-
19 07002-11423 O-ring 1 15001-
20 02896-11008 O-ring 1 15001-
21 02782-10516 Elbow 1 15001-
22 07002-12034 O-ring 1 15001-
23 02896-11015 O-ring 1 15001-
24 07002-12434 O-ring 1 15001-
Reference:H0340-004001 Page:H023001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Drain Piping, Fuel Tank to Swivel Joint and Solenoid Valve (#15001-)
Index Code Part Number Description Qty Serial No.
25 21W-62-43642 Hose Assembly 1 15001-
26 08210-01801 Tube, Spiral 1 15001-
27 203-62-52210 Rubber 1 15001-
28 08034-20519 Band 2 15001-
29 02783-10628 Elbow 1 15001-
30 07002-62434 O-ring 1 15001-
31 02896-61018 O-ring 1 15001-
32 21W-62-54381 Plate 1 15001-
33 01010-81225 Bolt 2 15001-
34 01643-31232 Washer 2 15001-
35 23S-62-25850 Clip 1 15001-
36 144-54-51280 Collar 1 15001-
37 01010-81280 Bolt 1 15001-
38 01643-31232 Washer 1 15001-
39 08034-20536 Band 1 15001-
40 04434-51710 Clip 1 15001-
41 01010-81020 Bolt 1 15001-
42 01643-31032 Washer 1 15001-

Reference:H0340-004001 Page:H023001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002146
31 27
32 26
28

18 24
19
23
25
21
7 20
22 29
9

7
2 10
3 8
9 33
1 6
2 35 29 36
5 30
4 17
34
30
30

33
30

15
29
16 33
14 6

13

12
17

12 11

Reference:H0340-004002 Page:H023002

PC78US-8 S/N 15001-UP


Drain Piping, PPC and Drain Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-46240 Tee 1 15001-
2 02896-11012 O-ring 2 15001-
3 02896-11009 O-ring 1 15001-
4 07002-12034 O-ring 1 15001-
5 02789-10422 Plug 1 15001-
6 21W-62-57620 Hose 1 15001-
7 21W-62-57731 Clip 2 15001-
8 07095-20418 Cushion 1 15001-
9 08034-20536 Band 2 15001-
10 08034-20536 Band 1 15001-
11 21W-62-46591 Bracket 1 15001-
12 02896-11012 O-ring 2 15001-
13 04434-51010 Clip 1 15001-
14 04434-51410 Clip 1 15001-
15 01010-81025 Bolt 1 15001-
16 01643-31032 Washer 1 15001-
17 21W-62-46830 Hose 1 15001-
18 21W-62-51720 Tee 1 15001-
19 07002-11423 O-ring 1 15001-
20 02781-0021D Union 1 15001-
21 07002-11423 O-ring 1 15001-
22 02896-11008 O-ring 1 15001-
23 02782-10210 Elbow 1 15001-
24 07002-11423 O-ring 1 15001-
25 02896-11008 O-ring 1 15001-
26 20Y-62-58480 Elbow 1 15001-
27 07002-11423 O-ring 1 15001-
28 02896-11008 O-ring 1 15001-
29 21W-62-56741 Hose 1 15001-
30 21W-62-38390 Band 7 15001-
Reference:H0340-004002 Page:H023002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Drain Piping, PPC and Drain Piping (#15001-)
Index Code Part Number Description Qty Serial No.
31 21J-62-15940 Adapter 1 15083-
32 07002-11423 O-ring 1 15083-
33 21W-06-51180 Wiring Harness 1 15001-
34 08034-40521 Band 3 15001-
35 (21W-62-46442) Tube
36 (02782-10210) Elbow

Reference:H0340-004002 Page:H023002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Drain Piping, With Overload Alarm, Arm Anti-drop Valve
FIG. Name FIG. No.
Drain Piping, Fuel Tank to Swivel Joint and Solenoid Valve H0340-003001
Drain Piping, PPC and Drain Piping H0340-003002

Reference:X22-1039600 Page:H024000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001568

10
9
26
11
13 25
14 33
30
2 5 34 29
31
1
39 12 28
4
12 5 27
24 28
20
3
18 17 41
19
15 36 42
16
23 40
37
21 38 2
8
22 35

6 3
7
1
33
34

32

Reference:H0340-003001 Page:H024001

PC78US-8 S/N 15001-UP


Drain Piping, Fuel Tank to Swivel Joint and Solenoid Valve (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-51411 Hose 1 15001-
21U-62-34720 Band, Black 1 15001-
21U-62-34750 Band, Blue 1 15001-
2 21W-62-51440 Hose 1 15001-
21U-62-34770 Band, White 1 15001-
21U-62-34730 Band, Green 1 15001-
3 21W-62-45920 Hose 1 15001-
21U-62-34770 Band, White 1 15001-
21U-62-34750 Band, Blue 1 15001-
4 02760-00326 Hose, Face Seal Type 1 15001-
5 08034-20519 Band 2 15001-
6 02782-10315 Elbow 1 15001-
7 07002-12034 O-ring 1 15001-
8 02896-11009 O-ring 1 15001-
9 02781-0021D Union 1 15001-
10 07002-11423 O-ring 1 15001-
11 02896-11008 O-ring 1 15001-
12 21W-62-51460 Hose 1 15001-
13 01010-81220 Bolt 1 15001-
14 01643-31232 Washer 1 15001-
15 02782-10311 Elbow 1 15001-
16 07002-11423 O-ring 1 15001-
17 02896-11009 O-ring 1 15001-
18 02782-10210 Elbow 1 15001-
19 07002-11423 O-ring 1 15001-
20 02896-11008 O-ring 1 15001-
21 02782-10516 Elbow 1 15001-
22 07002-12034 O-ring 1 15001-
23 02896-11015 O-ring 1 15001-
24 07002-12434 O-ring 1 15001-
Reference:H0340-003001 Page:H024001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Drain Piping, Fuel Tank to Swivel Joint and Solenoid Valve (#15001-)
Index Code Part Number Description Qty Serial No.
25 21W-62-43642 Hose Assembly 1 15001-
26 08210-01801 Tube, Spiral 1 15001-
27 203-62-52210 Rubber 1 15001-
28 08034-20519 Band 2 15001-
29 02783-10628 Elbow 1 15001-
30 07002-62434 O-ring 1 15001-
31 02896-61018 O-ring 1 15001-
32 21W-62-54381 Plate 1 15001-
33 01010-81225 Bolt 2 15001-
34 01643-31232 Washer 2 15001-
35 23S-62-25850 Clip 1 15001-
36 144-54-51280 Collar 1 15001-
37 01010-81280 Bolt 1 15001-
38 01643-31232 Washer 1 15001-
39 08034-20536 Band 1 15001-
40 04434-51710 Clip 1 15001-
41 01010-81020 Bolt 1 15001-
42 01643-31032 Washer 1 15001-

Reference:H0340-003001 Page:H024001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002145

32 6
38
39
21 33

37
17 8
9 32
18 34 40 31
19 21 41 30
21 32
5 17
2 36 22 28
23
3 27
1 20 42 7 29
44
2 34 45 25
6
35 24
4 16
26
43
35
35

35

14
34
15 40
13 5

12

11
16

11 10

Reference:H0340-003002 Page:H024002

PC78US-8 S/N 15001-UP


Drain Piping, PPC and Drain Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-46240 Tee 1 15001-
2 02896-11012 O-ring 2 15001-
3 02896-11009 O-ring 1 15001-
4 07002-12034 O-ring 1 15001-
5 21W-62-57620 Hose 1 15001-
6 21W-62-57632 Hose 1 15870-
A2 21W-62-57631 Hose 1 15001-15869
7 04434-51910 Clip 1 15001-
8 01010-81025 Bolt 1 15001-
9 01643-31032 Washer 1 15001-
10 21W-62-46591 Bracket 1 15001-
11 02896-11012 O-ring 2 15001-
12 04434-51010 Clip 1 15001-
13 04434-51410 Clip 1 15001-
14 01010-81025 Bolt 1 15001-
15 01643-31032 Washer 1 15001-
16 21W-62-46830 Hose 1 15001-
17 21W-62-57731 Clip 2 15001-
18 07095-20627 Cushion 1 15001-
19 08034-20536 Band 1 15001-
20 08034-20536 Band 2 15001-
21 08034-20536 Band 3 15001-
22 21W-62-51720 Tee 1 15001-
23 07002-11423 O-ring 1 15001-
24 02781-0021D Union 1 15001-
25 07002-11423 O-ring 1 15001-
26 02896-11008 O-ring 1 15001-
27 02782-10210 Elbow 1 15001-
28 07002-11423 O-ring 1 15001-
29 02896-11008 O-ring 1 15001-
Reference:H0340-003002 Page:H024002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Drain Piping, PPC and Drain Piping (#15001-)
Index Code Part Number Description Qty Serial No.
30 21W-62-46260 Tee 1 15001-
31 07002-11423 O-ring 1 15001-
32 02896-11008 O-ring 2 15001-
33 02765-00231 Hose, Face Seal Type 1 15001-
34 21W-62-56741 Hose 1 15001-
35 21W-62-38390 Band 7 15001-
36 08034-20519 Band 1 15001-
37 04434-51012 Clip 1 15001-
38 01010-81225 Bolt 1 15001-
39 01643-31232 Washer 1 15001-
40 11Y-62-12490 Union 1 15083-
41 07002-11423 O-ring 1 15083-
42 21W-06-51180 Wiring Harness 1 15001-
43 08034-40521 Band 3 15001-
44 (21W-62-46442) Tube
45 (02782-10210) Elbow

Reference:H0340-003002 Page:H024002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Boom Piping
FIG. Name FIG. No.
Boom Piping H1210-001001

Reference:X22-1036131 Page:H025000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001387

2
1
3
18
7 17
6
19
5

13 10
12 11 24
13 9 8 23
4

22
14 15
27
33 28
26
25
21
16 30
34 29
37 30
36
20
34
35
31 32

Reference:H1210-001001 Page:H025001

PC78US-8 S/N 15001-UP


Boom Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 02781-00522 Union 1 15001-
2 07002-12434 O-ring 1 15001-
3 02896-11015 O-ring 1 15001-
4 21W-62-43651 Hose 1 15001-
5 21W-62-43181 Bracket 1 15001-
6 01010-81025 Bolt 2 15001-
7 01643-31032 Washer 2 15001-
8 07094-10620 Clamp 1 15001-
9 07095-00526 Cushion 1 15001-
10 01010-81240 Bolt 1 15001-
11 01643-31232 Washer 1 15001-
12 21W-62-43141 Bracket 1 15001-
13 02896-11015 O-ring 2 15001-
14 01010-81030 Bolt 2 15001-
15 01643-31032 Washer 2 15001-
16 21W-62-43661 Hose 1 15001-
17 21W-62-42980 Nipple 1 15001-
18 07002-12434 O-ring 1 15001-
19 02896-11012 O-ring 1 15001-
20 21W-62-43671 Hose Assembly 1 15001-
21 08210-01802 Tube, Spiral 1 15001-
22 21W-62-43181 Bracket 1 15001-
23 01010-81025 Bolt 2 15001-
24 01643-31032 Washer 2 15001-
25 07094-10417 Clamp 1 15001-
26 07095-00419 Cushion 1 15001-
27 01010-81240 Bolt 1 15001-
28 01643-31232 Washer 1 15001-
29 21W-62-43151 Bracket 1 15001-
30 02896-11012 O-ring 2 15001-
Reference:H1210-001001 Page:H025001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Boom Piping (#15001-)
Index Code Part Number Description Qty Serial No.
31 01010-81025 Bolt 2 15001-
32 01643-31032 Washer 2 15001-
33 21W-62-52682 Hose, Black 1 15001-
34 07094-10417 Clamp 2 15001-
35 07095-00419 Cushion 1 15001-
36 01010-81260 Bolt 1 15001-
37 01643-31232 Washer 1 15001-

Reference:H1210-001001 Page:H025001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm and Bucket Piping, Without 1-Additional Actuator Piping
FIG. Name FIG. No.
Arm and Bucket Piping H1220-002001

Reference:X22-0826420 Page:H026000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001392

6
3
11
9
10
13
19
12

19
8
7
9
13
5
4
6
2 14
1 21
3 15
20
11 10 12 16

17
18
22
21

Reference:H1220-002001 Page:H026001

PC78US-8 S/N 15001-UP


Arm and Bucket Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 02781-00425 Union 1 15001-
2 07002-12434 O-ring 1 15001-
3 02896-11012 O-ring 1 15001-
4 21W-62-42481 Nipple 1 15001-
5 07002-12434 O-ring 1 15001-
6 02896-11015 O-ring 1 15001-
7 02781-00422 Union 2 15001-
8 07002-12034 O-ring 2 15001-
9 02896-11012 O-ring 2 15001-
10 21W-62-45540 Hose, Green 1 15001-
11 21W-62-45550 Hose, Orange 1 15001-
12 21W-62-45570 Hose, Red 1 15001-
13 21W-62-45580 Hose, Blue 1 15001-
14 21W-62-43270 Clamp 1 15001-
15 21W-62-43280 Rubber 1 15001-
16 21W-62-44460 Rubber 1 15001-
17 01010-81235 Bolt 2 15001-
18 01643-31232 Washer 2 15001-
19 08034-20519 Band 4 15001-
20 21W-62-41340 Plug 1 15001-
21 21W-62-41350 Plug 2 15001-
22 21W-62-45240 Plug 1 15001-

Reference:H1220-002001 Page:H026001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm and Bucket Piping, With 1-Additional Actuator Piping
FIG. Name FIG. No.
Arm and Bucket Piping H1220-003001

Reference:X22-0826430 Page:H027000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001393

6
3
11
9
10
13
19
12

19
8
7
9

5 13
4
6
2
14
1
3
15

11 10 12 16

17
18
20
21

Reference:H1220-003001 Page:H027001

PC78US-8 S/N 15001-UP


Arm and Bucket Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 02781-00425 Union 1 15001-
2 07002-12434 O-ring 1 15001-
3 02896-11012 O-ring 1 15001-
4 21W-62-42481 Nipple 1 15001-
5 07002-12434 O-ring 1 15001-
6 02896-11015 O-ring 1 15001-
7 02781-00422 Union 2 15001-
8 07002-12034 O-ring 2 15001-
9 02896-11012 O-ring 2 15001-
10 21W-62-45540 Hose, Green 1 15001-
11 21W-62-45550 Hose, Orange 1 15001-
12 21W-62-45570 Hose, Red 1 15001-
13 21W-62-45580 Hose, Blue 1 15001-
14 21W-62-43270 Clamp 1 15001-
15 21W-62-43280 Rubber 1 15001-
16 21W-62-44460 Rubber 1 15001-
17 01010-81235 Bolt 2 15001-
18 01643-31232 Washer 2 15001-
19 08034-20519 Band 6 15001-
20 21W-62-45240 Plug 1 15001-
21 21W-62-41350 Plug 1 15001-

Reference:H1220-003001 Page:H027001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Additional Actuator Piping, With 1-Service Valve
FIG. Name FIG. No.
Additional Actuator Piping H1270-004001

Reference:X22-0693790 Page:H028000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001452

3
4

5 4

2
1

Reference:H1270-004001 Page:H028001

PC78US-8 S/N 15001-UP


Additional Actuator Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 07040-12012 Plug 2 15001-
2 07002-12034 O-ring 2 15001-
3 02782-10210 Elbow 2 15001-
4 07002-11423 O-ring 2 15001-
5 02896-11008 O-ring 2 15001-
6 21W-62-43330 Hose 1 15001-

Reference:H1270-004001 Page:H028001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Additional Actuator Piping, With 1-Additional Actuator Piping
FIG. Name FIG. No.
Additional Actuator Piping, Piping H1270-001001
Additional Actuator Piping, Control Pattern Change Over Valve (1/2) H1270-001002
Additional Actuator Piping, Control Pattern Change Over Valve (2/2) H1270-001003
Additional Actuator Piping, Filter H1270-001004
Additional Actuator Piping, Accumulator (#15001-21061) H1270-001005
Additional Actuator Piping, Accumulator (#21062-) H1270-001005A

Reference:X22-1036141 Page:H029000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001395

12 13 10
19 6
19
17
18
20 3 4
20

11 10
15

9
7
1 21 21 14 8
2 16
24 23
22 25
31
26 32
25 24 26
28 33
29

27 30

28 31
29 32

Reference:H1270-001001 Page:H029001

PC78US-8 S/N 15001-UP


Additional Actuator Piping, Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-973-4760 Hose 1 15001-
2 21W-973-4770 Hose 1 15001-
3 02766-00405 Hose, Face Seal Type 1 15001-
4 02766-00406 Hose, Face Seal Type 1 15001-
5 21W-62-52911 Hose 1 15001-
6 21W-62-52920 Hose 1 15001-
7 21W-973-4150 Nipple 1 15001-
8 07002-12434 O-ring 1 15001-
9 02896-11018 O-ring 1 15001-
10 07094-30620 Clamp 2 15001-
11 07095-00627 Cushion 2 15001-
12 01010-81270 Bolt 1 15001-
13 01643-31232 Washer 1 15001-
14 21W-973-4141 Elbow 1 15001-
15 07002-13334 O-ring 1 15001-
16 207-62-64740 O-ring 1 15001-
17 21W-62-42470 Nipple 1 15001-
18 427-43-28660 Union 1 15001-
19 07002-12034 O-ring 2 15001-
20 02896-11012 O-ring 2 15001-
21 08034-20519 Band 2 15001-
22 21J-62-22110 Elbow 1 15001-
23 20Y-62-58480 Elbow 1 15001-
24 07002-11423 O-ring 2 15001-
25 02896-11008 O-ring 2 15001-
26 206-06-61130 Switch, Pressure 2 15001-
27 21W-62-51611 Hose 1 21086-
A2 21W-62-51610 Hose 1 15001-21085
28 21U-62-34770 Band, White 2 15001-
29 21U-62-34780 Band, Brown 2 15001-
Reference:H1270-001001 Page:H029001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Additional Actuator Piping, Piping (#15001-)
Index Code Part Number Description Qty Serial No.
30 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
31 21U-62-34770 Band, White 2 15001-
32 21U-62-34740 Band, Orange 2 15001-
33 08034-20536 Band 1 15001-

Reference:H1270-001001 Page:H029001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002085
5
13
14

2 12

11

6
8 18
7
3 16
17

19
22
15
1
20

10
20
22

21

23

Reference:H1270-001002 Page:H029002

PC78US-8 S/N 15001-UP


Additional Actuator Piping, Control Pattern Change Over Valve (1/2) (#15001-)
Index Code Part Number Description Qty Serial No.
22P-62-13400 Valve Assembly 1 15001-
1 203-62-65570 Plate 1 15001-
2 203-62-65580 Bar 1 15001-
3 20B-54-12210 Spring 1 15001-
4 203-00-56640 Plate, Arrow Mark 1 15001-
5 203-62-65380 Plate, Mark 1 15001-
6 01010-81230 Bolt 1 15001-
7 01643-31232 Washer 1 15001-
8 01023-10406 Screw 2 15001-
9 04050-12018 Pin, Cotter 1 15001-
22P-62-13410 Valve Assembly 1 15001-
10 22P-62-13420 Block 1 15001-
11 22P-62-13570 Rotor 1 15001-
12 20Y-970-3350 Flange 1 15001-
13 01010-81025 Bolt 2 15001-
14 01643-31032 Washer 2 15001-
15 04025-00412 Pin, Spring 1 15001-
16 07000-13042 O-ring 2 15001-
17 07000-13048 O-ring 1 15001-
18 07001-03042 Ring, Back-up 3 15001-
19 07001-03048 Ring, Back-up 1 15001-
20 07002-11223 O-ring 2 15001-
21 07002-12034 O-ring 1 15001-
22 07040-11209 Plug 2 15001-
23 07040-12012 Plug 1 15001-

Reference:H1270-001002 Page:H029002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001090

Reference:H1270-001003 Page:H029003

PC78US-8 S/N 15001-UP


Additional Actuator Piping, Control Pattern Change Over Valve (2/2) (#15001-)
Index Code Part Number Description Qty Serial No.
22P-62-13400 Valve Assembly 1 15001-
1 709-70-74700 Valve Assembly, Suction and Relief 1 15001-
2 709-25-11390 O-ring 1 15001-

Reference:H1270-001003 Page:H029003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002096
22

23

27
24
25
28
26
29

21

25 24
26

8
6

5 11
7 9
10 12
3 14
4
13

16
19
20
18 17
15
2

Reference:H1270-001004 Page:H029004

PC78US-8 S/N 15001-UP


Additional Actuator Piping, Filter (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81030 Bolt 3 15001-
2 01643-31032 Washer 3 15001-
3 02782-10422 Elbow 1 15001-
4 07002-12034 O-ring 1 15001-
5 02896-11012 O-ring 1 15001-
6 02782-10422 Elbow 1 15001-
7 07002-12034 O-ring 1 15001-
8 02896-11012 O-ring 1 15001-
9 02783-10422 Elbow 1 15001-
10 07002-12034 O-ring 1 15001-
11 02896-11012 O-ring 1 15001-
12 02783-10628 Elbow 1 15001-
13 07002-12434 O-ring 1 15001-
14 02896-11018 O-ring 1 15001-
15 02782-10628 Elbow 1 15001-
16 07002-12434 O-ring 1 15001-
17 02896-11018 O-ring 1 15001-
18 21W-62-52930 Bracket 1 15001-
19 01010-81230 Bolt 2 15001-
20 01643-31232 Washer 2 15001-
21 22P-62-13310 Filter 1 15001-
201-973-7480 Element Assembly 1 15001-
07000-12090 O-ring 1 15001-
07000-12014 O-ring 1 15001-
22 01010-81035 Bolt 4 15001-
23 01643-31032 Washer 4 15001-
24 11Y-62-12340 Elbow 2 15001-
25 07002-13334 O-ring 2 15001-
26 02896-11018 O-ring 2 15001-
27 22P-62-12311 Bracket 1 15001-
Reference:H1270-001004 Page:H029004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Additional Actuator Piping, Filter (#15001-)
Index Code Part Number Description Qty Serial No.
28 01010-81230 Bolt 4 15001-
29 01643-31232 Washer 4 15001-

Reference:H1270-001004 Page:H029004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001397

7 1

6
5

Reference:H1270-001005 Page:H029005

PC78US-8 S/N 15001-UP


Additional Actuator Piping, Accumulator (#15001-21061)
Index Code Part Number Description Qty Serial No.
1 22B-62-24461 Accumulator 1 21062-@
A2 22B-62-24460 Accumulator 1 15001-21061
2 22B-62-24470 Cap 1 15001-@
3 21W-62-54270 Bracket 1 15001-@
4 07002-12034 O-ring 1 15001-@
5 02896-11015 O-ring 1 15001-@
6 02755-005A4 Hose, Face Seal Type 1 15001-@
7 02781-00516 Union 1 15001-@
8 07002-12034 O-ring 1 15001-@
9 02896-11015 O-ring 1 15001-@

Reference:H1270-001005 Page:H029005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014537

9
3
8
1
10

7
6

Reference:H1270-001005A Page:H029006

PC78US-8 S/N 15001-UP


Additional Actuator Piping, Accumulator (#21062-)
Index Code Part Number Description Qty Serial No.
1 22B-62-24461 Accumulator 1 21062-
2 22B-62-24470 Cap 1 15001-
3 09659-A057B Plate, Warning, Explosion Hazard 1 21062-
4 21W-62-54270 Bracket 1 15001-
5 07002-12034 O-ring 1 15001-
6 02896-11015 O-ring 1 15001-
7 02755-005A4 Hose, Face Seal Type 1 15001-
8 02781-00516 Union 1 15001-
9 07002-12034 O-ring 1 15001-
10 02896-11015 O-ring 1 15001-

Reference:H1270-001005A Page:H029006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Blade Piping
FIG. Name FIG. No.
Blade Piping H1290-001001

Reference:X22-0690381 Page:H030000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001400

6
4
5
3
1
2

Reference:H1290-001001 Page:H030001

PC78US-8 S/N 15001-UP


Blade Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 02781-00313 Union 1 15001-
2 07002-11823 O-ring 1 15001-
3 02896-11009 O-ring 1 15001-
4 11Y-62-12360 Union 1 15001-
5 07002-11823 O-ring 1 15001-
6 02896-11012 O-ring 1 15001-
21W-62-43401 Hose Assembly 1 15001-
7 02767-004A7 Hose, Face Seal Type 1 15001-
8 21W-62-43830 Hose 1 15001-

Reference:H1290-001001 Page:H030001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Travel Piping, Without Blade
FIG. Name FIG. No.
Travel Piping H1310-001001

Reference:X22-0690871 Page:H031000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001610

5
4
6
2 7
1 8
3 9
16 11
12
17
10
18
14 13
15
7 19 9 8

12
11

10
13
15
14
18 17 16

Reference:H1310-001001 Page:H031001

PC78US-8 S/N 15001-UP


Travel Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-43121 Nipple 2 15001-
2 07002-12034 O-ring 2 15001-
3 02896-11015 O-ring 2 15001-
4 21W-62-43131 Nipple 2 15001-
5 07002-12034 O-ring 2 15001-
6 02896-11015 O-ring 2 15001-
7 21W-62-43750 Hose 1 15001-
8 21U-62-34720 Band, Black 2 15001-
9 21U-62-34710 Band, Yellow 2 15001-
10 21W-62-43770 Hose 1 15001-
11 21U-62-34730 Band, Green 2 15001-
12 21U-62-34710 Band, Yellow 2 15001-
13 21W-62-43770 Hose 1 15001-
14 21U-62-34780 Band, Brown 2 15001-
15 21U-62-34710 Band, Yellow 2 15001-
16 21W-62-43770 Hose 1 15001-
17 21U-62-34740 Band, Orange 2 15001-
18 21U-62-34710 Band, Yellow 2 15001-
19 08210-01801 Tube, Spiral 1 15001-

Reference:H1310-001001 Page:H031001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Travel Piping, With Blade
FIG. Name FIG. No.
Travel Piping H1310-002001

Reference:X22-0691170 Page:H032000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001411

5
4
6
2 16
1 17
3 18
7 11
12
8
9 10
14 13
15
16 19 18 17

12
11

10
13
15
14
9 8 7

Reference:H1310-002001 Page:H032001

PC78US-8 S/N 15001-UP


Travel Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-43121 Nipple 2 15001-
2 07002-12034 O-ring 2 15001-
3 02896-11015 O-ring 2 15001-
4 21W-62-43131 Nipple 2 15001-
5 07002-12034 O-ring 2 15001-
6 02896-11015 O-ring 2 15001-
7 21W-62-43750 Hose 1 15001-
8 21U-62-34730 Band, Green 2 15001-
9 21U-62-34710 Band, Yellow 2 15001-
10 21W-62-43750 Hose 1 15001-
11 21U-62-34780 Band, Brown 2 15001-
12 21U-62-34710 Band, Yellow 2 15001-
13 21W-62-43750 Hose 1 15001-
14 21U-62-34740 Band, Orange 2 15001-
15 21U-62-34710 Band, Yellow 2 15001-
16 21W-62-43780 Hose 1 15001-
17 21U-62-34720 Band, Black 2 15001-
18 21U-62-34710 Band, Yellow 2 15001-
19 08210-01801 Tube, Spiral 1 15001-

Reference:H1310-002001 Page:H032001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Swing Piping
FIG. Name FIG. No.
Swing Piping H1340-001001

Reference:X22-1039440 Page:H033000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001412

2
1
3
5 5
4
7

4
6

Reference:H1340-001001 Page:H033001

PC78US-8 S/N 15001-UP


Swing Piping (#15001-15739)
Index Code Part Number Description Qty Serial No.
1 21W-62-42460 Nipple 2 15001-15739
2 07002-11823 O-ring 2 15001-15739
3 02896-11012 O-ring 2 15001-15739
4 21W-62-43820 Hose, White 1 15001-15739
5 21W-62-52710 Hose 1 15001-15739
6 08210-01802 Tube, Spiral 1 15001-15739
7 21W-62-22180 Grommet 1 15001-15739

Reference:H1340-001001 Page:H033001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Swing Piping
FIG. Name FIG. No.
Swing Piping H1340-003001

Reference:X22-1039441 Page:H034000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001412

2
1
3
5 5
4
7

4
6

Reference:H1340-003001 Page:H034001

PC78US-8 S/N 15001-UP


Swing Piping (#15740-)
Index Code Part Number Description Qty Serial No.
1 21W-62-42460 Nipple 2 15740-
2 07002-11823 O-ring 2 15740-
3 02896-11012 O-ring 2 15740-
4 21W-62-56820 Hose 1 15740-
5 21W-62-52710 Hose 1 15740-
6 08210-01802 Tube, Spiral 1 15740-
7 21W-62-22180 Grommet 1 15740-

Reference:H1340-003001 Page:H034001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Solenoid Valve, Without Control Pattern Change Over Valve
FIG. Name FIG. No.
Solenoid Valve H1831-001001

Reference:X22-1036151 Page:H035000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000599

39
22

35 38
20
36
34 21
33

32
31 10
30
14 13 1

11
17 12 37
24 8
23
19 26
9
15 25
29
18 28
27
16

4 2
1
3 4

3
6
5

Reference:H1831-001001 Page:H035001

PC78US-8 S/N 15001-UP


Solenoid Valve (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-60-12112 Valve Assembly 1 15659-
22P-60-12111 Valve Assembly 1 15001-15658
2 20Y-60-32121 Solenoid Assembly 4 15001-
3 20Y-60-31250 O-ring 4 15001-
4 20Y-60-31240 O-ring 4 15001-
5 07040-11007 Plug 1 15001-
6 NY80000-02200 Plug 3 15001-
7 NY81416-05012 Bolt, Hexagon Socket Head 8 15001-
8 20Y-62-22310 Elbow 1 15001-
9 07002-12034 O-ring 1 15001-
10 20Y-60-11411 Accumulator 1 21445-
A2 20Y-60-11410 Accumulator 1 15001-21444
11 07002-12034 O-ring 1 15001-
12 02782-10210 Elbow 2 15001-
13 07002-11423 O-ring 2 15001-
14 02896-11008 O-ring 2 15001-
21W-62-43900 Tee Assembly 1 15001-
15 21W-62-42810 Tee 1 15001-
16 07040-11007 Plug 1 15001-
17 07002-11023 O-ring 1 15001-
18 07002-11423 O-ring 1 15001-
19 02896-11008 O-ring 1 15001-
20 02782-10516 Elbow 1 15001-
21 07002-12034 O-ring 1 15001-
22 02896-11015 O-ring 1 15001-
23 11Y-62-12490 Union 1 15001-
24 07002-11423 O-ring 1 15001-
25 02782-50210 Elbow 1 15001-
26 07002-11423 O-ring 1 15001-
27 02896-11008 O-ring 1 15001-
Reference:H1831-001001 Page:H035001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Solenoid Valve (#15001-)
Index Code Part Number Description Qty Serial No.
28 07040-11007 Plug 1 15001-
29 07002-11023 O-ring 1 15001-
30 20Y-62-21940 Joint 1 15001-
31 07002-12034 O-ring 1 15001-
32 02781-0031D Union 1 15001-
33 07002-11423 O-ring 1 15001-
34 02896-11009 O-ring 1 15001-
35 08211-02820 Clip 1 15001-
36 07095-20523 Cushion 1 15001-
37 201-03-29160 Spacer 2 15001-
38 01643-31032 Washer 2 15001-
39 01011-81005 Bolt 2 15001-

Reference:H1831-001001 Page:H035001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Without Blade
FIG. Name FIG. No.
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping H1840-001001
Proportional Pressure Control (PPC) Valve Piping, Band H1840-001002
Proportional Pressure Control (PPC) Valve Piping, Mounting H1840-001003
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304) H1840-001004
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-) H1840-001004A

Reference:X22-1036161 Page:H036000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001418

31

15
16

5 1
17 30
6
14
18
2
3 19
20
4

29

28

30
14
2 29
28
18 20
27 22 2426
2123
24 25
19 3
1 138
6 5 1012 7
4 9 10 11
15 17 16

Reference:H1840-001001 Page:H036001

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-53521 Hose 1 21086-
A2 21W-62-53520 Hose 1 15001-21085
21U-62-34760 Band, Red 2 15001-
2 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
21U-62-34710 Band, Yellow 2 15001-
3 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
21U-62-34710 Band, Yellow 2 15001-
4 21W-62-51141 Hose 1 21086-
A2 21W-62-51140 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
5 21W-62-51122 Hose 1 21086-
A2 21W-62-51121 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
6 21W-62-51111 Hose 1 21086-
A2 21W-62-51110 Hose 1 15001-21085
21U-62-34710 Band, Yellow 2 15001-
21W-60-42201 Valve Assembly 1 15001-
7 20T-60-82320 Poppet 1 15001-
8 21W-62-44770 Body 1 15001-
9 21W-62-44780 Nipple 1 15001-
10 07002-11423 O-ring 2 15001-
11 21W-62-42940 Nipple 1 15001-
12 21W-62-44740 Plug 1 15001-
13 02896-11008 O-ring 1 15001-
14 21W-62-51281 Hose 1 21086-
A2 21W-62-51280 Hose 1 15001-21085
Reference:H1840-001001 Page:H036001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
14 21U-62-34750 Band, Blue 2 15001-
21U-62-34730 Band, Green 2 15001-
15 21W-62-41611 Hose 1 21086-
A2 21W-62-41610 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
16 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
17 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
18 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
21U-62-34710 Band, Yellow 2 15001-
19 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
21U-62-34710 Band, Yellow 2 15001-
20 02774-00220 Hose 1 21086-
A2 02760-00220 Hose 1 15001-21085
21U-62-34770 Band, White 2 15001-
21W-60-42201 Valve Assembly 1 15001-
21 20T-60-82320 Poppet 1 15001-
22 21W-62-44770 Body 1 15001-
23 21W-62-44780 Nipple 1 15001-
24 07002-11423 O-ring 2 15001-
25 21W-62-42940 Nipple 1 15001-
26 21W-62-44740 Plug 1 15001-
27 02896-11008 O-ring 1 15001-
28 21W-62-51330 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
29 21W-62-51320 Hose 1 15001-
21U-62-34730 Band, Green 2 15001-
21U-62-34760 Band, Red 2 15001-
30 21W-62-51310 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
21U-62-34760 Band, Red 2 15001-
31 02761-00204 Hose, Face Seal Type 1 15001-

Reference:H1840-001001 Page:H036001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001419

13
7
16 14
8
5 12
6 11
15
2
3

1
15
9
10
4

15

Reference:H1840-001002 Page:H036002

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Band (#15001-)
Index Code Part Number Description Qty Serial No.
1 04434-51212 Clip 1 15001-
2 01010-81220 Bolt 1 15001-
3 01643-31232 Washer 1 15001-
4 21W-62-51991 Cover 1 15001-
5 04434-52312 Clip 1 15001-
6 07095-20318 Cushion 1 15001-
7 01010-81020 Bolt 1 15001-
8 01643-31032 Washer 1 15001-
9 01010-81020 Bolt 2 15001-
10 01643-31032 Washer 2 15001-
11 581-22-12760 Spacer 2 15001-
12 21W-62-42790 Cover 1 15001-
13 01010-81265 Bolt 2 15001-
14 01643-31232 Washer 2 15001-
15 08034-20536 Band 5 15001-
16 08034-20536 Band 1 15001-

Reference:H1840-001002 Page:H036002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000592
3

Reference:H1840-001003 Page:H036003

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-54320 Bracket 1 15001-
2 20U-62-22320 Plate 2 15001-
3 01010-81020 Bolt 4 15001-
4 01643-31032 Washer 4 15001-
5 01010-81225 Bolt 2 15001-
6 01643-31232 Washer 2 15001-

Reference:H1840-001003 Page:H036003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001425
5
21
22

5
23 21 6 21
21
4 22
23

22
23
21
7 8 5
9 21
23
22

21 23 22
10 2
22 21
21
11 22
22
1
22 21
1 21 24
14
23

22 19
29
22 21 12 16
3 21 13 15
1 21 28 21 20 18
17
22
24 21 27 30
12 13
14 25
19
16 26
15
18
17
22

Reference:H1840-001004 Page:H036004

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 5 15001-@
2 02782-1021A Elbow 1 15001-@
3 20Y-62-27680 Adapter 1 15001-@
4 21J-62-22110 Elbow 1 15001-@
5 20Y-62-58480 Elbow 3 15001-@
6 11Y-62-12490 Union 1 15001-@
21W-62-51820 Valve Assembly 1 15001-@
7 20T-60-82320 Poppet 1 15001-@
8 21W-62-44740 Plug 1 15001-@
9 21W-62-51830 Tee 1 15001-@
10 21W-62-43930 Nipple 1 15001-@
11 21W-62-42671 Tee 1 15001-@
21W-60-52301 Valve Assembly 2 16305-@
A2 21W-60-52300 Valve Assembly 2 15001-16304
12 20T-60-82320 Poppet 1 15001-@
13 21W-60-52310 Plug 1 16305-@
A2 21W-62-44740 Plug 1 15001-16304
14 21W-62-51770 Tee 1 15001-@
21W-60-52400 Valve Assembly 2 15001-16304
15 21W-62-44760 Body 1 15001-16304
16 07002-11423 O-ring 1 15001-16304
17 21W-62-43930 Nipple 1 15001-16304
18 07002-11423 O-ring 1 15001-16304
19 20B-27-11210 Bleeder 2 15001-@
20 11Y-62-12490 Union 1 15001-@
21 07002-11423 O-ring 20 15001-16304
22 02896-11008 O-ring 15 15001-@
23 206-06-61130 Switch, Pressure 6 15001-@
24 7861-93-1840 Sensor, Pressure 2 15001-@
07000-12011 O-ring 1 15001-@
Reference:H1840-001004 Page:H036004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
25 02782-10313 Elbow 1 15001-@
26 07002-11823 O-ring 1 15001-@
27 02896-11009 O-ring 1 15001-@
28 21W-62-45930 Elbow 1 15001-@
29 07002-11423 O-ring 1 15001-@
30 7861-93-1812 Sensor, Pressure 1 15950-@
A2 7861-93-1811 Sensor, Pressure 1 15001-15949
07002-61823 O-ring 1 15950-@
07002-11823 O-ring 1 15001-15949

Reference:H1840-001004 Page:H036004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006687
6
22
25

6
27 23 7 23
21
5 26
27

24
27
21
8 9 6
10 22
27
25

23 27 25
11 3
24 22
21
12 25
24
1
26 22
1 21 28
15
27 23
26 19
33
14
26 23 18
4 20 17
2 23 32 13
28 31 16
34 26
23
15 29
19 14
18 30
17
13
16
26

Reference:H1840-001004A Page:H036005

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 4 15001-
2 02782-10210 Elbow 1 15001-
3 02782-1021A Elbow 1 15001-
4 20Y-62-27680 Adapter 1 15001-
5 21J-62-22110 Elbow 1 15001-
6 20Y-62-58480 Elbow 3 15001-
7 11Y-62-12490 Union 1 15001-
21W-62-51820 Valve Assembly 1 15001-
8 20T-60-82320 Poppet 1 15001-
9 21W-62-44740 Plug 1 15001-
10 21W-62-51830 Tee 1 15001-
11 21W-62-43930 Nipple 1 15001-
12 21W-62-42671 Tee 1 15001-
21W-60-52301 Valve Assembly 2 16305-
13 20T-60-82320 Poppet 1 15001-
14 21W-60-52310 Plug 1 16305-
15 21W-62-51770 Tee 1 15001-
16 21W-62-44770 Body 1 16305-
17 21W-62-44780 Nipple 1 16305-
18 07002-11423 O-ring 2 16305-
19 20B-27-11210 Bleeder 2 15001-
20 11Y-62-12490 Union 1 15001-
21 07002-11423 O-ring 5 15001-
22 07002-11423 O-ring 5 15001-
23 07002-11423 O-ring 8 15001-
24 02896-11008 O-ring 3 15001-
25 02896-11008 O-ring 5 15001-
26 02896-11008 O-ring 7 15001-
27 206-06-61130 Switch, Pressure 6 15001-
28 7861-93-1840 Sensor, Pressure 2 15001-
Reference:H1840-001004A Page:H036005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
28 07000-12011 O-ring 1 15001-
29 02782-10313 Elbow 1 15001-
30 07002-11823 O-ring 1 15001-
31 02896-11009 O-ring 1 15001-
32 21W-62-45930 Elbow 1 15001-
33 07002-11423 O-ring 1 15001-
34 7861-93-1812 Sensor, Pressure 1 15950-
07002-61823 O-ring 1 15950-

Reference:H1840-001004A Page:H036005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, With Arm Anti-drop Valve, Boom Anti-drop Valve, Without Blade
FIG. Name FIG. No.
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping H1840-012001
Proportional Pressure Control (PPC) Valve Piping, Band H1840-012002
Proportional Pressure Control (PPC) Valve Piping, Mounting H1840-012003
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304) H1840-012004
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-) H1840-012004A

Reference:X22-1091290 Page:H037000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001418

31

15
16

5 1
17 30
6
14
18
2
3 19
20
4

29

28

30
14
2 29
28
18 20
27 22 2426
2123
24 25
19 3
1 138
6 5 1012 7
4 9 10 11
15 17 16

Reference:H1840-012001 Page:H037001

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-53521 Hose 1 21086-
A2 21W-62-53520 Hose 1 15001-21085
21U-62-34760 Band, Red 2 15001-
2 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
21U-62-34710 Band, Yellow 2 15001-
3 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
21U-62-34710 Band, Yellow 2 15001-
4 21W-62-51141 Hose 1 21086-
A2 21W-62-51140 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
5 21W-62-51122 Hose 1 21086-
A2 21W-62-51121 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
6 21W-62-51111 Hose 1 21086-
A2 21W-62-51110 Hose 1 15001-21085
21U-62-34710 Band, Yellow 2 15001-
21W-60-42201 Valve Assembly 1 15001-
7 20T-60-82320 Poppet 1 15001-
8 21W-62-44770 Body 1 15001-
9 21W-62-44780 Nipple 1 15001-
10 07002-11423 O-ring 2 15001-
11 21W-62-42940 Nipple 1 15001-
12 21W-62-44740 Plug 1 15001-
13 02896-11008 O-ring 1 15001-
14 21W-62-51281 Hose 1 21086-
A2 21W-62-51280 Hose 1 15001-21085
Reference:H1840-012001 Page:H037001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
14 21U-62-34750 Band, Blue 2 15001-
21U-62-34730 Band, Green 2 15001-
15 21W-62-41611 Hose 1 21086-
A2 21W-62-41610 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
16 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
17 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
18 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
21U-62-34710 Band, Yellow 2 15001-
19 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
21U-62-34710 Band, Yellow 2 15001-
20 02774-00220 Hose 1 21086-
A2 02760-00220 Hose 1 15001-21085
21U-62-34770 Band, White 2 15001-
21W-60-42201 Valve Assembly 1 15001-
21 20T-60-82320 Poppet 1 15001-
22 21W-62-44770 Body 1 15001-
23 21W-62-44780 Nipple 1 15001-
24 07002-11423 O-ring 2 15001-
25 21W-62-42940 Nipple 1 15001-
26 21W-62-44740 Plug 1 15001-
27 02896-11008 O-ring 1 15001-
28 21W-62-51330 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
29 21W-62-51320 Hose 1 15001-
21U-62-34730 Band, Green 2 15001-
21U-62-34760 Band, Red 2 15001-
30 21W-62-51310 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
21U-62-34760 Band, Red 2 15001-
31 02761-00204 Hose, Face Seal Type 1 15001-

Reference:H1840-012001 Page:H037001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001419

13
7
16 14
8
5 12
6 11
15
2
3

1
15
9
10
4

15

Reference:H1840-012002 Page:H037002

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Band (#15001-)
Index Code Part Number Description Qty Serial No.
1 04434-51212 Clip 1 15001-
2 01010-81220 Bolt 1 15001-
3 01643-31232 Washer 1 15001-
4 21W-62-51991 Cover 1 15001-
5 04434-52312 Clip 1 15001-
6 07095-20318 Cushion 1 15001-
7 01010-81020 Bolt 1 15001-
8 01643-31032 Washer 1 15001-
9 01010-81020 Bolt 2 15001-
10 01643-31032 Washer 2 15001-
11 581-22-12760 Spacer 2 15001-
12 21W-62-42790 Cover 1 15001-
13 01010-81265 Bolt 2 15001-
14 01643-31232 Washer 2 15001-
15 08034-20536 Band 5 15001-
16 08034-20536 Band 1 15001-

Reference:H1840-012002 Page:H037002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000592
3

Reference:H1840-012003 Page:H037003

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-54320 Bracket 1 15001-
2 20U-62-22320 Plate 2 15001-
3 01010-81020 Bolt 4 15001-
4 01643-31032 Washer 4 15001-
5 01010-81225 Bolt 2 15001-
6 01643-31232 Washer 2 15001-

Reference:H1840-012003 Page:H037003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001530

5
23 21 6 21
21
4 22
23

22
23
21
9 7 8
23

21 23
10
22 2 22
11 21 21
22 22
22 1
21
1 21 24
14
23

22 19
29
22 21 12 16
3 21 13 15
1 21 28 21 20 18
17
22
24 21 27 30
13
14 12 25
19
16 26
15
18
17
22

Reference:H1840-012004 Page:H037004

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 5 15001-@
2 02782-1021A Elbow 1 15001-@
3 20Y-62-27680 Adapter 1 15001-@
4 21J-62-22110 Elbow 1 15001-@
5 20Y-62-58480 Elbow 1 15001-@
6 11Y-62-12490 Union 1 15001-15082
21W-62-51820 Valve Assembly 1 15001-@
7 20T-60-82320 Poppet 1 15001-@
8 21W-62-44740 Plug 1 15001-@
9 21W-62-51830 Tee 1 15001-@
10 21W-62-43930 Nipple 1 15001-@
11 21W-62-42671 Tee 1 15001-@
21W-60-52301 Valve Assembly 2 16305-@
A2 21W-60-52300 Valve Assembly 2 15001-16304
12 20T-60-82320 Poppet 1 15001-@
13 21W-60-52310 Plug 1 16305-@
A2 21W-62-44740 Plug 1 15001-16304
14 21W-62-51770 Tee 1 15001-@
21W-60-52400 Valve Assembly 2 15001-16304
15 21W-62-44760 Body 1 15001-16304
16 07002-11423 O-ring 1 15001-16304
17 21W-62-43930 Nipple 1 15001-16304
18 07002-11423 O-ring 1 15001-16304
19 20B-27-11210 Bleeder 2 15001-@
20 11Y-62-12490 Union 1 15001-@
21 07002-11423 O-ring 17 15001-16304
07002-11423 O-ring 18 15001-15082
22 02896-11008 O-ring 13 15001-@
23 206-06-61130 Switch, Pressure 6 15001-@
24 7861-93-1840 Sensor, Pressure 2 15001-@
Reference:H1840-012004 Page:H037004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
24 07000-12011 O-ring 1 15001-@
25 02782-10313 Elbow 1 15001-@
26 07002-11823 O-ring 1 15001-@
27 02896-11009 O-ring 1 15001-@
28 21W-62-45930 Elbow 1 15001-@
29 07002-11423 O-ring 1 15001-@
30 7861-93-1812 Sensor, Pressure 1 15950-@
A2 7861-93-1811 Sensor, Pressure 1 15001-15949
07002-61823 O-ring 1 15950-@
07002-11823 O-ring 1 15001-15949

Reference:H1840-012004 Page:H037004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006688
20
5
26 26 21 6

23 25
20
7 8
26 9
26

20 26
10
23 3 25
20 22
11
23 25
24 1
22
1 21 27
14
26 22
24 18
32
13
24 20 17
4 19 16
2 21 31 12
27 30 15
33 25
21
18 13 14 28
17 29
16
12
15
24

Reference:H1840-012004A Page:H037005

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 4 15001-
2 02782-10210 Elbow 1 15001-
3 02782-1021A Elbow 1 15001-
4 20Y-62-27680 Adapter 1 15001-
5 21J-62-22110 Elbow 1 15001-
6 20Y-62-58480 Elbow 1 15001-
21W-62-51820 Valve Assembly 1 15001-
7 20T-60-82320 Poppet 1 15001-
8 21W-62-44740 Plug 1 15001-
9 21W-62-51830 Tee 1 15001-
10 21W-62-43930 Nipple 1 15001-
11 21W-62-42671 Tee 1 15001-
21W-60-52301 Valve Assembly 2 16305-
12 20T-60-82320 Poppet 1 15001-
13 21W-60-52310 Plug 1 16305-
14 21W-62-51770 Tee 1 15001-
15 21W-62-44770 Body 1 16305-
16 21W-62-44780 Nipple 1 16305-
17 07002-11423 O-ring 2 16305-
18 20B-27-11210 Bleeder 2 15001-
19 11Y-62-12490 Union 1 15001-
20 07002-11423 O-ring 5 15001-
21 07002-11423 O-ring 5 15001-
22 07002-11423 O-ring 5 15001-
23 02896-11008 O-ring 3 15001-
24 02896-11008 O-ring 5 15001-
25 02896-11008 O-ring 5 15001-
26 206-06-61130 Switch, Pressure 6 15001-
27 7861-93-1840 Sensor, Pressure 2 15001-
07000-12011 O-ring 1 15001-
Reference:H1840-012004A Page:H037005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
28 02782-10313 Elbow 1 15001-
29 07002-11823 O-ring 1 15001-
30 02896-11009 O-ring 1 15001-
31 21W-62-45930 Elbow 1 15001-
32 07002-11423 O-ring 1 15001-
33 7861-93-1812 Sensor, Pressure 1 15950-
07002-61823 O-ring 1 15950-

Reference:H1840-012004A Page:H037005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, With Control Pattern Change Over Valve (ISO/BACKHOE), Without
Blade
FIG. Name FIG. No.
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping H1840-007001
Proportional Pressure Control (PPC) Valve Piping, Band H1840-007002
Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (1/2) H1840-007003
Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#15001-16607) H1840-007004
Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#16608-) H1840-007004A
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304) H1840-007005
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-) H1840-007005A
Proportional Pressure Control (PPC) Valve Piping, Plate and Case H1840-007006

Reference:X22-1039620 Page:H038000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001550

31

15
16
17
1
5 14 30
6
18
2 19
3 20
4

29

28

28
29
14
2 30
15
1 9 10 11
18 13 8 1012 7
3
5
19
6 24 25
4 20 27 22 24 262123
16
17

Reference:H1840-007001 Page:H038001

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-53521 Hose 1 21086-
A2 21W-62-53520 Hose 1 15001-21085
21U-62-34760 Band, Red 2 15001-
2 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
21U-62-34710 Band, Yellow 2 15001-
3 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
21U-62-34710 Band, Yellow 2 15001-
4 21W-62-51141 Hose 1 21086-
A2 21W-62-51140 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
5 21W-62-51122 Hose 1 21086-
A2 21W-62-51121 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
6 21W-62-51111 Hose 1 21086-
A2 21W-62-51110 Hose 1 15001-21085
21U-62-34710 Band, Yellow 2 15001-
21W-60-42201 Valve Assembly 1 15001-
7 20T-60-82320 Poppet 1 15001-
8 21W-62-44770 Body 1 15001-
9 21W-62-44780 Nipple 1 15001-
10 07002-11423 O-ring 2 15001-
11 21W-62-42940 Nipple 1 15001-
12 21W-62-44740 Plug 1 15001-
13 02896-11008 O-ring 1 15001-
14 21W-62-51281 Hose 1 21086-
A2 21W-62-51280 Hose 1 15001-21085
Reference:H1840-007001 Page:H038001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
14 21U-62-34750 Band, Blue 2 15001-
21U-62-34730 Band, Green 2 15001-
15 21W-62-41611 Hose 1 21086-
A2 21W-62-41610 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
16 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
17 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
18 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
21U-62-34710 Band, Yellow 2 15001-
19 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
21U-62-34710 Band, Yellow 2 15001-
20 02774-00220 Hose 1 21086-
A2 02760-00220 Hose 1 15001-21085
21U-62-34770 Band, White 2 15001-
21W-60-42201 Valve Assembly 1 15001-
21 20T-60-82320 Poppet 1 15001-
22 21W-62-44770 Body 1 15001-
23 21W-62-44780 Nipple 1 15001-
24 07002-11423 O-ring 2 15001-
25 21W-62-42940 Nipple 1 15001-
26 21W-62-44740 Plug 1 15001-
27 02896-11008 O-ring 1 15001-
28 21W-62-51330 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
29 21W-62-51320 Hose 1 15001-
21U-62-34730 Band, Green 2 15001-
21U-62-34760 Band, Red 2 15001-
30 21W-62-51310 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
21U-62-34760 Band, Red 2 15001-
31 02761-00204 Hose, Face Seal Type 1 15001-

Reference:H1840-007001 Page:H038001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001552

7 13
16 8 14
5 12
6
11

15 2
3

15
1
15 9
10
4

15

Reference:H1840-007002 Page:H038002

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Band (#15001-)
Index Code Part Number Description Qty Serial No.
1 04434-51212 Clip 1 15001-
2 01010-81220 Bolt 1 15001-
3 01643-31232 Washer 1 15001-
4 21W-62-51991 Cover 1 15001-
5 04434-52312 Clip 1 15001-
6 07095-20318 Cushion 1 15001-
7 01010-81020 Bolt 1 15001-
8 01643-31032 Washer 1 15001-
9 01010-81020 Bolt 2 15001-
10 01643-31032 Washer 2 15001-
11 581-22-12760 Spacer 2 15001-
12 21W-62-42790 Cover 1 15001-
13 01010-81265 Bolt 2 15001-
14 01643-31232 Washer 2 15001-
15 08034-20536 Band 5 15001-
16 08034-20536 Band 1 15001-

Reference:H1840-007002 Page:H038002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001496

11

6 7 10 9

13 4

3 14 12

14
13
2

Reference:H1840-007003 Page:H038003

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (1/2) (#15001-)
Index Code Part Number Description Qty Serial No.
22P-62-12250 Valve Assembly 1 15001-
22L-62-24851 Valve Assembly 1 15001-
1 NY09000-1080B Plate, Name 1 15001-
2 NY16076-1030A Plate 1 15001-
3 NY16076-10400 Collar 1 15001-
4 NY16229-10100 Plate 1 15001-
5 NY16229-10200 Plate 1 15001-
6 NY16229-10300 Lever 1 15001-
7 NY16229-10400 Collar 1 15001-
8 NY81900-00079 Bolt 1 15001-
9 NY81900-00081 Bolt, Wing 1 15001-
10 NY83110-30080 Nut 1 15001-
11 NY84110-00248 Screw 2 15001-
12 NY84230-51335 Pin 1 15001-
13 NY86786-01019 O-ring 2 15001-
14 NY86900-60062 O-ring 2 15001-

Reference:H1840-007003 Page:H038003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001535
17

13 13 18
14
9 11
8 12 16
10 14
11
9 8
10
10 10

6
18 3
6
7 3
27
15
7 1 2
5
1 12
6
16 15
6 25
7
17 26
4
7 24

4
19

20
24
26
25 22
23

21

28

Reference:H1840-007004 Page:H038004

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#15001-16607)
Index Code Part Number Description Qty Serial No.
22P-62-12250 Valve Assembly 1 15001-@
1 20U-Y14-1550 Elbow 2 15001-@
2 22P-62-13350 Adapter 2 15001-@
3 07000-12014 O-ring 4 15001-@
4 02782-10210 Elbow 2 15001-@
5 07002-11423 O-ring 2 15001-@
6 22M-62-15590 Joint 4 15001-@
7 02896-11008 O-ring 4 15001-@
8 22P-62-13350 Adapter 2 15001-@
9 22P-62-13360 Elbow 2 15001-@
10 07000-12014 O-ring 4 15001-@
11 07002-11423 O-ring 2 15001-@
12 21W-62-42940 Nipple 2 15001-@
13 201-62-75420 Elbow 2 15001-@
14 07002-11423 O-ring 2 15001-@
15 21U-62-34710 Band, Yellow 2 15001-@
16 21U-62-34720 Band, Black 2 15001-@
17 21U-62-34730 Band, Green 2 15001-@
18 21U-62-34740 Band, Orange 2 15001-@
19 01010-81025 Bolt 2 15001-@
20 01643-31032 Washer 2 15001-@
21 21W-62-51190 Bracket 1 15001-16607
22 01010-81225 Bolt 2 15001-@
23 01643-31232 Washer 2 15001-@
24 22P-62-13670 Bracket 2 15001-@
25 01010-81020 Bolt 4 15001-@
26 01643-31032 Washer 4 15001-@
27 08034-20536 Band 1 15001-@
28 22L-98-22910 Wrench 1 15001-@

Reference:H1840-007004 Page:H038004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006883
17

13 13 18
14
9 11
8 12 16
10 14
11
9 8
10
10 10

6
18 3
6
7 3
15 27
7 1 2
5
1 12
6
16 15
6
7 25
17 4 26
7 24
4
19

20
24
26
22
25
23

21

28

Reference:H1840-007004A Page:H038005

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#16608-)
Index Code Part Number Description Qty Serial No.
22P-62-12250 Valve Assembly 1 15001-
1 20U-Y14-1550 Elbow 2 15001-
2 22P-62-13350 Adapter 2 15001-
3 07000-12014 O-ring 4 15001-
4 02782-10210 Elbow 2 15001-
5 07002-11423 O-ring 2 15001-
6 22M-62-15590 Joint 4 15001-
7 02896-11008 O-ring 4 15001-
8 22P-62-13350 Adapter 2 15001-
9 22P-62-13360 Elbow 2 15001-
10 07000-12014 O-ring 4 15001-
11 07002-11423 O-ring 2 15001-
12 21W-62-42940 Nipple 2 15001-
13 201-62-75420 Elbow 2 15001-
14 07002-11423 O-ring 2 15001-
15 21U-62-34710 Band, Yellow 2 15001-
16 21U-62-34720 Band, Black 2 15001-
17 21U-62-34730 Band, Green 2 15001-
18 21U-62-34740 Band, Orange 2 15001-
19 01010-81025 Bolt 2 15001-
20 01643-31032 Washer 2 15001-
21 21W-62-51191 Bracket 1 16608-
22 01010-81225 Bolt 2 15001-
23 01643-31232 Washer 2 15001-
24 22P-62-13670 Bracket 2 15001-
25 01010-81020 Bolt 4 15001-
26 01643-31032 Washer 4 15001-
27 08034-20536 Band 1 15001-20775
28 22L-98-22910 Wrench 1 15001-

Reference:H1840-007004A Page:H038005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001425
5
21
22

5
23 21 6 21
21
4 22
23

22
23
21
7 8 5
9 21
23
22

21 23 22
10 2
22 21
21
11 22
22
1
22 21
1 21 24
14
23

22 19
29
22 21 12 16
3 21 13 15
1 21 28 21 20 18
17
22
24 21 27 30
12 13
14 25
19
16 26
15
18
17
22

Reference:H1840-007005 Page:H038006

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 5 15001-@
2 02782-1021A Elbow 1 15001-@
3 20Y-62-27680 Adapter 1 15001-@
4 21J-62-22110 Elbow 1 15001-@
5 20Y-62-58480 Elbow 3 15001-@
6 11Y-62-12490 Union 1 15001-@
21W-62-51820 Valve Assembly 1 15001-@
7 20T-60-82320 Poppet 1 15001-@
8 21W-62-44740 Plug 1 15001-@
9 21W-62-51830 Tee 1 15001-@
10 21W-62-43930 Nipple 1 15001-@
11 21W-62-42671 Tee 1 15001-@
21W-60-52301 Valve Assembly 2 16305-@
A2 21W-60-52300 Valve Assembly 2 15001-16304
12 20T-60-82320 Poppet 1 15001-@
13 21W-60-52310 Plug 1 16305-@
A2 21W-62-44740 Plug 1 15001-16304
14 21W-62-51770 Tee 1 15001-@
21W-60-52400 Valve Assembly 2 15001-16304
15 21W-62-44760 Body 1 15001-16304
16 07002-11423 O-ring 1 15001-16304
17 21W-62-43930 Nipple 1 15001-16304
18 07002-11423 O-ring 1 15001-16304
19 20B-27-11210 Bleeder 2 15001-@
20 11Y-62-12490 Union 1 15001-@
21 07002-11423 O-ring 20 15001-16304
22 02896-11008 O-ring 15 15001-@
23 206-06-61130 Switch, Pressure 6 15001-@
24 7861-93-1840 Sensor, Pressure 2 15001-@
07000-12011 O-ring 1 15001-@
Reference:H1840-007005 Page:H038006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
25 02782-10313 Elbow 1 15001-@
26 07002-11823 O-ring 1 15001-@
27 02896-11009 O-ring 1 15001-@
28 21W-62-45930 Elbow 1 15001-@
29 07002-11423 O-ring 1 15001-@
30 7861-93-1812 Sensor, Pressure 1 15950-@
A2 7861-93-1811 Sensor, Pressure 1 15001-15949
07002-61823 O-ring 1 15950-@
07002-11823 O-ring 1 15001-15949

Reference:H1840-007005 Page:H038006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006687
6
22
25

6
27 23 7 23
21
5 26
27

24
27
21
8 9 6
10 22
27
25

23 27 25
11 3
24 22
21
12 25
24
1
26 22
1 21 28
15
27 23
26 19
33
14
26 23 18
4 20 17
2 23 32 13
28 31 16
34 26
23
15 29
19 14
18 30
17
13
16
26

Reference:H1840-007005A Page:H038007

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 4 15001-
2 02782-10210 Elbow 1 15001-
3 02782-1021A Elbow 1 15001-
4 20Y-62-27680 Adapter 1 15001-
5 21J-62-22110 Elbow 1 15001-
6 20Y-62-58480 Elbow 3 15001-
7 11Y-62-12490 Union 1 15001-
21W-62-51820 Valve Assembly 1 15001-
8 20T-60-82320 Poppet 1 15001-
9 21W-62-44740 Plug 1 15001-
10 21W-62-51830 Tee 1 15001-
11 21W-62-43930 Nipple 1 15001-
12 21W-62-42671 Tee 1 15001-
21W-60-52301 Valve Assembly 2 16305-
13 20T-60-82320 Poppet 1 15001-
14 21W-60-52310 Plug 1 16305-
15 21W-62-51770 Tee 1 15001-
16 21W-62-44770 Body 1 16305-
17 21W-62-44780 Nipple 1 16305-
18 07002-11423 O-ring 2 16305-
19 20B-27-11210 Bleeder 2 15001-
20 11Y-62-12490 Union 1 15001-
21 07002-11423 O-ring 5 15001-
22 07002-11423 O-ring 5 15001-
23 07002-11423 O-ring 8 15001-
24 02896-11008 O-ring 3 15001-
25 02896-11008 O-ring 5 15001-
26 02896-11008 O-ring 7 15001-
27 206-06-61130 Switch, Pressure 6 15001-
28 7861-93-1840 Sensor, Pressure 2 15001-
Reference:H1840-007005A Page:H038007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
28 07000-12011 O-ring 1 15001-
29 02782-10313 Elbow 1 15001-
30 07002-11823 O-ring 1 15001-
31 02896-11009 O-ring 1 15001-
32 21W-62-45930 Elbow 1 15001-
33 07002-11423 O-ring 1 15001-
34 7861-93-1812 Sensor, Pressure 1 15950-
07002-61823 O-ring 1 15950-

Reference:H1840-007005A Page:H038007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001516

1
2

5 4

Reference:H1840-007006 Page:H038008

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Plate and Case (#15001-)
Index Code Part Number Description Qty Serial No.
1 22M-98-11171 Plate, ISO/BH Lever Control Pattern 1 15001-
2 09822-00020 Case 1 15001-
3 09822-03010 Plate, Warning, Lever Control Pattern 1 15001-
4 22M-98-11181 Plate, Warning, Control Pattern Change Over 1 15001-
5 22B-00-21410 Plate, ISO/BH Lever Control Pattern 1 15001-
6 22J-98-1A610 Plate, ISO/BH Lever Control Pattern 1 15001-

Reference:H1840-007006 Page:H038008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, With Blade
FIG. Name FIG. No.
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping H1840-002001
Proportional Pressure Control (PPC) Valve Piping, Band H1840-002002
Proportional Pressure Control (PPC) Valve Piping, Mounting H1840-002003
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304) H1840-002004
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-) H1840-002004A

Reference:X22-1036171 Page:H039000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001458

31

15
16

17
5 1
14 30
6
2 18
19
3
8 22
21
7 20
4

29

28
7
21

28
3014
2
29
18 20
4 27 23 2624
26 25

19 3

1 13 9 12
6 1012
5 11
15 17 16

Reference:H1840-002001 Page:H039001

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-53521 Hose 1 21086-
A2 21W-62-53520 Hose 1 15001-21085
21U-62-34760 Band, Red 2 15001-
2 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
21U-62-34710 Band, Yellow 2 15001-
3 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
21U-62-34710 Band, Yellow 2 15001-
4 21W-62-51141 Hose 1 21086-
A2 21W-62-51140 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
5 21W-62-51122 Hose 1 21086-
A2 21W-62-51121 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
6 21W-62-51111 Hose 1 21086-
A2 21W-62-51110 Hose 1 15001-21085
21U-62-34710 Band, Yellow 2 15001-
7 21W-62-53171 Hose 1 21086-
A2 21W-62-53170 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
21U-62-34730 Band, Green 2 15001-
8 20U-62-22190 O-ring 1 15001-
21W-60-43200 Valve Assembly 1 15001-
9 21W-62-43930 Nipple 1 15001-
10 21W-62-44750 Body 1 15001-
11 21W-62-42940 Nipple 1 15001-
12 07002-11423 O-ring 2 15001-
Reference:H1840-002001 Page:H039001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
13 02896-11008 O-ring 1 15001-
14 21W-62-51281 Hose 1 21086-
A2 21W-62-51280 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
21U-62-34730 Band, Green 2 15001-
15 21W-62-41611 Hose 1 21086-
A2 21W-62-41610 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
16 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
17 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
18 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
21U-62-34710 Band, Yellow 2 15001-
19 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
21U-62-34710 Band, Yellow 2 15001-
20 02774-00220 Hose 1 21086-
A2 02760-00220 Hose 1 15001-21085
21U-62-34770 Band, White 2 15001-
21 21W-62-53272 Hose 1 21086-
A2 21W-62-53271 Hose 1 15001-21085
21U-62-34760 Band, Red 2 15001-
21U-62-34720 Band, Black 2 15001-
22 20U-62-22190 O-ring 1 15001-
21W-60-43200 Valve Assembly 1 15001-
23 21W-62-43930 Nipple 1 15001-
24 21W-62-44750 Body 1 15001-
25 21W-62-42940 Nipple 1 15001-
26 07002-11423 O-ring 2 15001-
27 02896-11008 O-ring 1 15001-
28 21W-62-51330 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
29 21W-62-51320 Hose 1 15001-
21U-62-34730 Band, Green 2 15001-
21U-62-34760 Band, Red 2 15001-
30 21W-62-51310 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
21U-62-34760 Band, Red 2 15001-
31 02761-00204 Hose, Face Seal Type 1 15001-

Reference:H1840-002001 Page:H039001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001461

7 13
17 8 14
5 12
6
11

16

16
2 1
3
16
9
10

15

16

Reference:H1840-002002 Page:H039002

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Band (#15001-)
Index Code Part Number Description Qty Serial No.
1 04434-51212 Clip 1 15001-
2 01010-81220 Bolt 1 15001-
3 01643-31232 Washer 1 15001-
4 21W-62-51991 Cover 1 15001-
5 04434-52312 Clip 1 15001-
6 07095-20318 Cushion 1 15001-
7 01010-81020 Bolt 1 15001-
8 01643-31032 Washer 1 15001-
9 01010-81020 Bolt 2 15001-
10 01643-31032 Washer 2 15001-
11 581-22-12760 Spacer 2 15001-
12 21W-62-42790 Cover 1 15001-
13 01010-81265 Bolt 2 15001-
14 01643-31232 Washer 2 15001-
15 04435-51010 Clip 1 15001-
16 08034-20536 Band 5 15001-
17 08034-20536 Band 1 15001-

Reference:H1840-002002 Page:H039002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000592
3

Reference:H1840-002003 Page:H039003

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-54320 Bracket 1 15001-
2 20U-62-22320 Plate 2 15001-
3 01010-81020 Bolt 4 15001-
4 01643-31032 Washer 4 15001-
5 01010-81225 Bolt 2 15001-
6 01643-31232 Washer 2 15001-

Reference:H1840-002003 Page:H039003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001456
5
20
21

5
22 20 6 20
20
4
22

21 21
20 22
9 10
22 11 20
5

21
20
22 21
12
21 2
20
1
20
13 21
21 20
1 20 23
14 19
21 20
23
21 20
22 17 16
28
17 18
14 22 8 16 15
27 21
7
19 18
26 29 20
15
21 20 21
24

25
22
7 8
21

21 20
3
20
1

Reference:H1840-002004 Page:H039004

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 5 15001-@
2 02782-1021A Elbow 1 15001-@
3 20Y-62-27680 Adapter 1 15001-@
4 21J-62-22110 Elbow 1 15001-@
5 20Y-62-58480 Elbow 3 15001-@
6 11Y-62-12490 Union 1 15001-@
7 22B-62-17450 Elbow 2 15001-@
8 20Y-62-22160 Adapter 2 15001-@
21W-62-51820 Valve Assembly 1 15001-@
9 20T-60-82320 Poppet 1 15001-@
10 21W-62-44740 Plug 1 15001-@
11 21W-62-51830 Tee 1 15001-@
12 21W-62-43930 Nipple 1 15001-@
13 21W-62-42671 Tee 1 15001-@
21W-60-53401 Valve Assembly 2 16305-@
A2 21W-60-53400 Valve Assembly 2 15001-16304
14 21W-62-51770 Tee 1 15001-@
15 21W-62-44780 Nipple 1 16305-@
A2 21W-62-43930 Nipple 1 15001-16304
16 21W-62-44740 Plug 1 15001-@
17 20T-60-82320 Poppet 1 15001-@
18 07002-11423 O-ring 1 15001-@
19 20B-27-11210 Bleeder 2 15001-@
20 07002-11423 O-ring 21 15001-@
21 02896-11008 O-ring 17 15001-@
22 206-06-61130 Switch, Pressure 8 15001-@
23 7861-93-1840 Sensor, Pressure 2 15001-@
07000-12011 O-ring 1 15001-@
24 02782-10315 Elbow 1 15001-@
25 07002-12034 O-ring 1 15001-@
Reference:H1840-002004 Page:H039004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
26 02896-11009 O-ring 1 15001-@
27 21W-62-45930 Elbow 1 15001-@
28 07002-11423 O-ring 1 15001-@
29 7861-93-1812 Sensor, Pressure 1 15950-@
A2 7861-93-1811 Sensor, Pressure 1 15001-15949
07002-61823 O-ring 1 15950-@
07002-11823 O-ring 1 15001-15949

Reference:H1840-002004 Page:H039004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006681
6
23
26

6
29 23 7 23
22
5
28

25 26
24 29
10 11
28 12 23
6

26
24
29 27
13
25 3
23
2
14 22 27
25 22
1 23 30
23 15 21
25
30
25
29 24
35 17
20
15 29 9 16
34 18
21 17 25 8 19
20 36 23 27
33
16 27
18 22 31
19
32

29
8 9
26

26 22
4
22
1

Reference:H1840-002004A Page:H039005

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 4 15001-
2 02782-10210 Elbow 1 15001-
3 02782-1021A Elbow 1 15001-
4 20Y-62-27680 Adapter 1 15001-
5 21J-62-22110 Elbow 1 15001-
6 20Y-62-58480 Elbow 3 15001-
7 11Y-62-12490 Union 1 15001-
8 22B-62-17450 Elbow 2 15001-
9 20Y-62-22160 Adapter 2 15001-
21W-62-51820 Valve Assembly 1 15001-
10 20T-60-82320 Poppet 1 15001-
11 21W-62-44740 Plug 1 15001-
12 21W-62-51830 Tee 1 15001-
13 21W-62-43930 Nipple 1 15001-
14 21W-62-42671 Tee 1 15001-
21W-60-53401 Valve Assembly 2 16305-
15 21W-62-51770 Tee 1 15001-
16 21W-62-44780 Nipple 1 16305-
17 21W-62-44740 Plug 1 15001-
18 20T-60-82320 Poppet 1 15001-
19 21W-62-44770 Body 1 16305-
20 07002-11423 O-ring 1 15001-
21 20B-27-11210 Bleeder 2 15001-
22 07002-11423 O-ring 8 15001-
23 07002-11423 O-ring 8 15001-
24 07002-11423 O-ring 5 15001-
25 02896-11008 O-ring 7 15001-
26 02896-11008 O-ring 5 15001-
27 02896-11008 O-ring 5 15001-
28 206-06-61130 Switch, Pressure 2 15001-
Reference:H1840-002004A Page:H039005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
29 206-06-61130 Switch, Pressure 6 15001-
30 7861-93-1840 Sensor, Pressure 2 15001-
07000-12011 O-ring 1 15001-
31 02782-10315 Elbow 1 15001-
32 07002-12034 O-ring 1 15001-
33 02896-11009 O-ring 1 15001-
34 21W-62-45930 Elbow 1 15001-
35 07002-11423 O-ring 1 15001-
36 7861-93-1812 Sensor, Pressure 1 15950-
07002-61823 O-ring 1 15950-

Reference:H1840-002004A Page:H039005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, With Blade, Arm Anti-drop Valve, Boom Anti-drop Valve
FIG. Name FIG. No.
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping H1840-013001
Proportional Pressure Control (PPC) Valve Piping, Band H1840-013002
Proportional Pressure Control (PPC) Valve Piping, Mounting H1840-013003
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304) H1840-013004
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-) H1840-013004A

Reference:X22-1091300 Page:H040000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001458

31

15
16

17
5 1
14 30
6
2 18
19
3
8 22
21
7 20
4

29

28
7
21

28
3014
2
29
18 20
4 27 23 2624
26 25

19 3

1 13 9 12
6 1012
5 11
15 17 16

Reference:H1840-013001 Page:H040001

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-53521 Hose 1 21086-
A2 21W-62-53520 Hose 1 15001-21085
21U-62-34760 Band, Red 2 15001-
2 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
21U-62-34710 Band, Yellow 2 15001-
3 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
21U-62-34710 Band, Yellow 2 15001-
4 21W-62-51141 Hose 1 21086-
A2 21W-62-51140 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
5 21W-62-51122 Hose 1 21086-
A2 21W-62-51121 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
6 21W-62-51111 Hose 1 21086-
A2 21W-62-51110 Hose 1 15001-21085
21U-62-34710 Band, Yellow 2 15001-
7 21W-62-53171 Hose 1 21086-
A2 21W-62-53170 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
21U-62-34730 Band, Green 2 15001-
8 20U-62-22190 O-ring 1 15001-
21W-60-43200 Valve Assembly 1 15001-
9 21W-62-43930 Nipple 1 15001-
10 21W-62-44750 Body 1 15001-
11 21W-62-42940 Nipple 1 15001-
12 07002-11423 O-ring 2 15001-
Reference:H1840-013001 Page:H040001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
13 02896-11008 O-ring 1 15001-
14 21W-62-51281 Hose 1 21086-
A2 21W-62-51280 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
21U-62-34730 Band, Green 2 15001-
15 21W-62-41611 Hose 1 21086-
A2 21W-62-41610 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
16 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
17 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
18 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
21U-62-34710 Band, Yellow 2 15001-
19 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
21U-62-34710 Band, Yellow 2 15001-
20 02774-00220 Hose 1 21086-
A2 02760-00220 Hose 1 15001-21085
21U-62-34770 Band, White 2 15001-
21 21W-62-53272 Hose 1 21086-
A2 21W-62-53271 Hose 1 15001-21085
21U-62-34760 Band, Red 2 15001-
21U-62-34720 Band, Black 2 15001-
22 20U-62-22190 O-ring 1 15001-
21W-60-43200 Valve Assembly 1 15001-
23 21W-62-43930 Nipple 1 15001-
24 21W-62-44750 Body 1 15001-
25 21W-62-42940 Nipple 1 15001-
26 07002-11423 O-ring 2 15001-
27 02896-11008 O-ring 1 15001-
28 21W-62-51330 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
29 21W-62-51320 Hose 1 15001-
21U-62-34730 Band, Green 2 15001-
21U-62-34760 Band, Red 2 15001-
30 21W-62-51310 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
21U-62-34760 Band, Red 2 15001-
31 02761-00204 Hose, Face Seal Type 1 15001-

Reference:H1840-013001 Page:H040001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001461

7 13
17 8 14
5 12
6
11

16

16
2 1
3
16
9
10

15

16

Reference:H1840-013002 Page:H040002

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Band (#15001-)
Index Code Part Number Description Qty Serial No.
1 04434-51212 Clip 1 15001-
2 01010-81220 Bolt 1 15001-
3 01643-31232 Washer 1 15001-
4 21W-62-51991 Cover 1 15001-
5 04434-52312 Clip 1 15001-
6 07095-20318 Cushion 1 15001-
7 01010-81020 Bolt 1 15001-
8 01643-31032 Washer 1 15001-
9 01010-81020 Bolt 2 15001-
10 01643-31032 Washer 2 15001-
11 581-22-12760 Spacer 2 15001-
12 21W-62-42790 Cover 1 15001-
13 01010-81265 Bolt 2 15001-
14 01643-31232 Washer 2 15001-
15 04435-51010 Clip 1 15001-
16 08034-20536 Band 5 15001-
17 08034-20536 Band 1 15001-

Reference:H1840-013002 Page:H040002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000592
3

Reference:H1840-013003 Page:H040003

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-54320 Bracket 1 15001-
2 20U-62-22320 Plate 2 15001-
3 01010-81020 Bolt 4 15001-
4 01643-31032 Washer 4 15001-
5 01010-81225 Bolt 2 15001-
6 01643-31232 Washer 2 15001-

Reference:H1840-013003 Page:H040003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001519

5
19 17 6 17
17
4
19

18 18
19

19

17 17
19
9
18 2 18
17
10 17 18
18 17
1 1 20
17
11 16
18 17
20
18 17
19 14 13
25
14 15
11 19 8 13 12
24 18
7
16 15
23 26 17
12
18 17 18
21

22
19
7 8
18

18 17
3
17
1

Reference:H1840-013004 Page:H040004

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 5 15001-@
2 02782-1021A Elbow 1 15001-@
3 20Y-62-27680 Adapter 1 15001-@
4 21J-62-22110 Elbow 1 15001-@
5 20Y-62-58480 Elbow 1 15001-@
6 11Y-62-12490 Union 1 15001-15082
7 22B-62-17450 Elbow 2 15001-@
8 20Y-62-22160 Adapter 2 15001-@
21W-62-51820 Valve Assembly 1 15001-@
9 21W-62-43930 Nipple 1 15001-@
10 21W-62-42671 Tee 1 15001-@
11 21W-62-51770 Tee 2 15001-@
12 A2 21W-62-43930 Nipple 2 15001-16304
13 21W-62-44740 Plug 2 15001-@
14 20T-60-82320 Poppet 2 15001-@
15 07002-11423 O-ring 2 15001-@
16 20B-27-11210 Bleeder 2 15001-@
17 07002-11423 O-ring 18 15001-@
07002-11423 O-ring 19 15001-15082
18 02896-11008 O-ring 15 15001-@
19 206-06-61130 Switch, Pressure 8 15001-@
20 7861-93-1840 Sensor, Pressure 2 15001-@
21 02782-10315 Elbow 1 15001-@
22 07002-12034 O-ring 1 15001-@
23 02896-11009 O-ring 1 15001-@
24 21W-62-45930 Elbow 1 15001-@
25 07002-11423 O-ring 1 15001-@
26 7861-93-1812 Sensor, Pressure 1 15950-@
A2 7861-93-1811 Sensor, Pressure 1 15001-15949

Reference:H1840-013004 Page:H040004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006683
19
5 6
26 21
26

22

9
26 24
26

19 19
26
10
22 3 24
21
1
20
11 24
22 19
1
21 27
12 18
23 21
27
22 20
26
32 14
17
12 25 8 13
18
14 22 31 15
7 16
17 33 21 24
30
13
23
15 20 28
16
29

25
7 8
23

23 20
4
20
2

Reference:H1840-013004A Page:H040005

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 4 20776-
2 02782-10210 Elbow 1 20776-
3 02782-1021A Elbow 1 15001-
4 20Y-62-27680 Adapter 1 15001-
5 21J-62-22110 Elbow 1 15001-
6 20Y-62-58480 Elbow 1 15001-
7 22B-62-17450 Elbow 2 15001-
8 20Y-62-22160 Adapter 2 15001-
9 21W-62-51820 Valve Assembly 1 15001-
10 21W-62-43930 Nipple 1 15001-
11 21W-62-42671 Tee 1 15001-
21W-60-53401 Valve Assembly 2 16305-
12 21W-62-51770 Tee 1 15001-
13 21W-62-44780 Nipple 1 16305-
14 21W-62-44740 Plug 1 15001-
15 20T-60-82320 Poppet 1 15001-
16 21W-62-44770 Body 1 16305-
17 07002-11423 O-ring 1 15001-
18 20B-27-11210 Bleeder 2 15001-
19 07002-11423 O-ring 5 20776-
20 07002-11423 O-ring 5 20776-
21 07002-11423 O-ring 8 20776-
22 02896-11008 O-ring 5 20776-
23 02896-11008 O-ring 5 20776-
24 02896-11008 O-ring 5 20776-
25 206-06-61130 Switch, Pressure 2 20776-
26 206-06-61130 Switch, Pressure 6 20776-
27 7861-93-1840 Sensor, Pressure 2 15001-
07000-12011 O-ring 1 15001-
28 02782-10315 Elbow 1 15001-
Reference:H1840-013004A Page:H040005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
29 07002-12034 O-ring 1 15001-
30 02896-11009 O-ring 1 15001-
31 21W-62-45930 Elbow 1 15001-
32 07002-11423 O-ring 1 15001-
33 7861-93-1812 Sensor, Pressure 1 15950-
07002-61823 O-ring 1 15950-

Reference:H1840-013004A Page:H040005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, With Blade, Control Pattern Change Over Valve (ISO/BACKHOE)
FIG. Name FIG. No.
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping H1840-004001
Proportional Pressure Control (PPC) Valve Piping, Band H1840-004002
Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (1/2) H1840-004003
Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#15001-16607) H1840-004004
Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#16608-) H1840-004004A
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304) H1840-004005
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-) H1840-004005A
Proportional Pressure Control (PPC) Valve Piping, Plate and Case H1840-004006

Reference:X22-1038980 Page:H041000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001548

31

15
16
17
5 1 30
14
6
2 18
3 19
22
8 21
20
7
4

29

28
7
21

28
29
14
2 30
15
1
18 13 9 1210 12 11
3
5
19
6 25
4 20 27 23 26 24 26
16
17

Reference:H1840-004001 Page:H041001

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-53521 Hose 1 21086-
A2 21W-62-53520 Hose 1 15001-21085
21U-62-34760 Band, Red 2 15001-
2 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
21U-62-34710 Band, Yellow 2 15001-
3 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
21U-62-34710 Band, Yellow 2 15001-
4 21W-62-51141 Hose 1 21086-
A2 21W-62-51140 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
5 21W-62-51122 Hose 1 21086-
A2 21W-62-51121 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
6 21W-62-51111 Hose 1 21086-
A2 21W-62-51110 Hose 1 15001-21085
21U-62-34710 Band, Yellow 2 15001-
7 21W-62-53171 Hose 1 21086-
A2 21W-62-53170 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
21U-62-34730 Band, Green 2 15001-
8 20U-62-22190 O-ring 1 15001-
21W-60-43200 Valve Assembly 1 15001-
9 21W-62-43930 Nipple 1 15001-
10 21W-62-44750 Body 1 15001-
11 21W-62-42940 Nipple 1 15001-
12 07002-11423 O-ring 2 15001-
Reference:H1840-004001 Page:H041001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
13 02896-11008 O-ring 1 15001-
14 21W-62-51281 Hose 1 21086-
A2 21W-62-51280 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
21U-62-34730 Band, Green 2 15001-
15 21W-62-41611 Hose 1 21086-
A2 21W-62-41610 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
16 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
17 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
18 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
21U-62-34710 Band, Yellow 2 15001-
19 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
21U-62-34710 Band, Yellow 2 15001-
20 02774-00220 Hose 1 21086-
A2 02760-00220 Hose 1 15001-21085
21U-62-34770 Band, White 2 15001-
21 21W-62-53272 Hose 1 21086-
A2 21W-62-53271 Hose 1 15001-21085
21U-62-34760 Band, Red 2 15001-
21U-62-34720 Band, Black 2 15001-
22 20U-62-22190 O-ring 1 15001-
21W-60-43200 Valve Assembly 1 15001-
23 21W-62-43930 Nipple 1 15001-
24 21W-62-44750 Body 1 15001-
25 21W-62-42940 Nipple 1 15001-
26 07002-11423 O-ring 2 15001-
27 02896-11008 O-ring 1 15001-
28 21W-62-51330 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
29 21W-62-51320 Hose 1 15001-
21U-62-34730 Band, Green 2 15001-
21U-62-34760 Band, Red 2 15001-
30 21W-62-51310 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
21U-62-34760 Band, Red 2 15001-
31 02761-00204 Hose, Face Seal Type 1 15001-

Reference:H1840-004001 Page:H041001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001549

7 13
17 8 14
5
12
6
11
16

16
2 1
3
16 9
10

15

16

Reference:H1840-004002 Page:H041002

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Band (#15001-)
Index Code Part Number Description Qty Serial No.
1 04434-51212 Clip 1 15001-
2 01010-81220 Bolt 1 15001-
3 01643-31232 Washer 1 15001-
4 21W-62-51991 Cover 1 15001-
5 04434-52312 Clip 1 15001-
6 07095-20318 Cushion 1 15001-
7 01010-81020 Bolt 1 15001-
8 01643-31032 Washer 1 15001-
9 01010-81020 Bolt 2 15001-
10 01643-31032 Washer 2 15001-
11 581-22-12760 Spacer 2 15001-
12 21W-62-42790 Cover 1 15001-
13 01010-81265 Bolt 2 15001-
14 01643-31232 Washer 2 15001-
15 04435-51010 Clip 1 15001-
16 08034-20536 Band 5 15001-
17 08034-20536 Band 1 15001-

Reference:H1840-004002 Page:H041002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001496

11

6 7 10 9

13 4

3 14 12

14
13
2

Reference:H1840-004003 Page:H041003

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (1/2) (#15001-)
Index Code Part Number Description Qty Serial No.
22P-62-12250 Valve Assembly 1 15001-
22L-62-24851 Valve Assembly 1 15001-
1 NY09000-1080B Plate, Name 1 15001-
2 NY16076-1030A Plate 1 15001-
3 NY16076-10400 Collar 1 15001-
4 NY16229-10100 Plate 1 15001-
5 NY16229-10200 Plate 1 15001-
6 NY16229-10300 Lever 1 15001-
7 NY16229-10400 Collar 1 15001-
8 NY81900-00079 Bolt 1 15001-
9 NY81900-00081 Bolt, Wing 1 15001-
10 NY83110-30080 Nut 1 15001-
11 NY84110-00248 Screw 2 15001-
12 NY84230-51335 Pin 1 15001-
13 NY86786-01019 O-ring 2 15001-
14 NY86900-60062 O-ring 2 15001-

Reference:H1840-004003 Page:H041003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001535
17

13 13 18
14
9 11
8 12 16
10 14
11
9 8
10
10 10

6
18 3
6
7 3
27
15
7 1 2
5
1 12
6
16 15
6 25
7
17 26
4
7 24

4
19

20
24
26
25 22
23

21

28

Reference:H1840-004004 Page:H041004

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#15001-16607)
Index Code Part Number Description Qty Serial No.
22P-62-12250 Valve Assembly 1 15001-@
1 20U-Y14-1550 Elbow 2 15001-@
2 22P-62-13350 Adapter 2 15001-@
3 07000-12014 O-ring 4 15001-@
4 02782-10210 Elbow 2 15001-@
5 07002-11423 O-ring 2 15001-@
6 22M-62-15590 Joint 4 15001-@
7 02896-11008 O-ring 4 15001-@
8 22P-62-13350 Adapter 2 15001-@
9 22P-62-13360 Elbow 2 15001-@
10 07000-12014 O-ring 4 15001-@
11 07002-11423 O-ring 2 15001-@
12 21W-62-42940 Nipple 2 15001-@
13 201-62-75420 Elbow 2 15001-@
14 07002-11423 O-ring 2 15001-@
15 21U-62-34710 Band, Yellow 2 15001-@
16 21U-62-34720 Band, Black 2 15001-@
17 21U-62-34730 Band, Green 2 15001-@
18 21U-62-34740 Band, Orange 2 15001-@
19 01010-81025 Bolt 2 15001-@
20 01643-31032 Washer 2 15001-@
21 21W-62-51190 Bracket 1 15001-16607
22 01010-81225 Bolt 2 15001-@
23 01643-31232 Washer 2 15001-@
24 22P-62-13670 Bracket 2 15001-@
25 01010-81020 Bolt 4 15001-@
26 01643-31032 Washer 4 15001-@
27 08034-20536 Band 1 15001-@
28 22L-98-22910 Wrench 1 15001-@

Reference:H1840-004004 Page:H041004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006883
17

13 13 18
14
9 11
8 12 16
10 14
11
9 8
10
10 10

6
18 3
6
7 3
15 27
7 1 2
5
1 12
6
16 15
6
7 25
17 4 26
7 24
4
19

20
24
26
22
25
23

21

28

Reference:H1840-004004A Page:H041005

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#16608-)
Index Code Part Number Description Qty Serial No.
22P-62-12250 Valve Assembly 1 15001-
1 20U-Y14-1550 Elbow 2 15001-
2 22P-62-13350 Adapter 2 15001-
3 07000-12014 O-ring 4 15001-
4 02782-10210 Elbow 2 15001-
5 07002-11423 O-ring 2 15001-
6 22M-62-15590 Joint 4 15001-
7 02896-11008 O-ring 4 15001-
8 22P-62-13350 Adapter 2 15001-
9 22P-62-13360 Elbow 2 15001-
10 07000-12014 O-ring 4 15001-
11 07002-11423 O-ring 2 15001-
12 21W-62-42940 Nipple 2 15001-
13 201-62-75420 Elbow 2 15001-
14 07002-11423 O-ring 2 15001-
15 21U-62-34710 Band, Yellow 2 15001-
16 21U-62-34720 Band, Black 2 15001-
17 21U-62-34730 Band, Green 2 15001-
18 21U-62-34740 Band, Orange 2 15001-
19 01010-81025 Bolt 2 15001-
20 01643-31032 Washer 2 15001-
21 21W-62-51191 Bracket 1 16608-
22 01010-81225 Bolt 2 15001-
23 01643-31232 Washer 2 15001-
24 22P-62-13670 Bracket 2 15001-
25 01010-81020 Bolt 4 15001-
26 01643-31032 Washer 4 15001-
27 08034-20536 Band 1 15001-20775
28 22L-98-22910 Wrench 1 15001-

Reference:H1840-004004A Page:H041005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001456
5
20
21

5
22 20 6 20
20
4
22

21 21
20 22
9 10
22 11 20
5

21
20
22 21
12
21 2
20
1
20
13 21
21 20
1 20 23
14 19
21 20
23
21 20
22 17 16
28
17 18
14 22 8 16 15
27 21
7
19 18
26 29 20
15
21 20 21
24

25
22
7 8
21

21 20
3
20
1

Reference:H1840-004005 Page:H041006

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 5 15001-@
2 02782-1021A Elbow 1 15001-@
3 20Y-62-27680 Adapter 1 15001-@
4 21J-62-22110 Elbow 1 15001-@
5 20Y-62-58480 Elbow 3 15001-@
6 11Y-62-12490 Union 1 15001-@
7 22B-62-17450 Elbow 2 15001-@
8 20Y-62-22160 Adapter 2 15001-@
21W-62-51820 Valve Assembly 1 15001-@
9 20T-60-82320 Poppet 1 15001-@
10 21W-62-44740 Plug 1 15001-@
11 21W-62-51830 Tee 1 15001-@
12 21W-62-43930 Nipple 1 15001-@
13 21W-62-42671 Tee 1 15001-@
21W-60-53401 Valve Assembly 2 16305-@
A2 21W-60-53400 Valve Assembly 2 15001-16304
14 21W-62-51770 Tee 1 15001-@
15 21W-62-44780 Nipple 1 16305-@
A2 21W-62-43930 Nipple 1 15001-16304
16 21W-62-44740 Plug 1 15001-@
17 20T-60-82320 Poppet 1 15001-@
18 07002-11423 O-ring 1 15001-@
19 20B-27-11210 Bleeder 2 15001-@
20 07002-11423 O-ring 21 15001-@
21 02896-11008 O-ring 17 15001-@
22 206-06-61130 Switch, Pressure 8 15001-@
23 7861-93-1840 Sensor, Pressure 2 15001-@
07000-12011 O-ring 1 15001-@
24 02782-10315 Elbow 1 15001-@
25 07002-12034 O-ring 1 15001-@
Reference:H1840-004005 Page:H041006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
26 02896-11009 O-ring 1 15001-@
27 21W-62-45930 Elbow 1 15001-@
28 07002-11423 O-ring 1 15001-@
29 7861-93-1812 Sensor, Pressure 1 15950-@
A2 7861-93-1811 Sensor, Pressure 1 15001-15949
07002-61823 O-ring 1 15950-@
07002-11823 O-ring 1 15001-15949

Reference:H1840-004005 Page:H041006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006681
6
23
26

6
29 23 7 23
22
5
28

25 26
24 29
10 11
28 12 23
6

26
24
29 27
13
25 3
23
2
14 22 27
25 22
1 23 30
23 15 21
25
30
25
29 24
35 17
20
15 29 9 16
34 18
21 17 25 8 19
20 36 23 27
33
16 27
18 22 31
19
32

29
8 9
26

26 22
4
22
1

Reference:H1840-004005A Page:H041007

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 4 15001-
2 02782-10210 Elbow 1 15001-
3 02782-1021A Elbow 1 15001-
4 20Y-62-27680 Adapter 1 15001-
5 21J-62-22110 Elbow 1 15001-
6 20Y-62-58480 Elbow 3 15001-
7 11Y-62-12490 Union 1 15001-
8 22B-62-17450 Elbow 2 15001-
9 20Y-62-22160 Adapter 2 15001-
21W-62-51820 Valve Assembly 1 15001-
10 20T-60-82320 Poppet 1 15001-
11 21W-62-44740 Plug 1 15001-
12 21W-62-51830 Tee 1 15001-
13 21W-62-43930 Nipple 1 15001-
14 21W-62-42671 Tee 1 15001-
21W-60-53401 Valve Assembly 2 16305-
15 21W-62-51770 Tee 1 15001-
16 21W-62-44780 Nipple 1 16305-
17 21W-62-44740 Plug 1 15001-
18 20T-60-82320 Poppet 1 15001-
19 21W-62-44770 Body 1 16305-
20 07002-11423 O-ring 1 15001-
21 20B-27-11210 Bleeder 2 15001-
22 07002-11423 O-ring 8 15001-
23 07002-11423 O-ring 8 15001-
24 07002-11423 O-ring 5 15001-
25 02896-11008 O-ring 7 15001-
26 02896-11008 O-ring 5 15001-
27 02896-11008 O-ring 5 15001-
28 206-06-61130 Switch, Pressure 2 15001-
Reference:H1840-004005A Page:H041007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
29 206-06-61130 Switch, Pressure 6 15001-
30 7861-93-1840 Sensor, Pressure 2 15001-
07000-12011 O-ring 1 15001-
31 02782-10315 Elbow 1 15001-
32 07002-12034 O-ring 1 15001-
33 02896-11009 O-ring 1 15001-
34 21W-62-45930 Elbow 1 15001-
35 07002-11423 O-ring 1 15001-
36 7861-93-1812 Sensor, Pressure 1 15950-
07002-61823 O-ring 1 15950-

Reference:H1840-004005A Page:H041007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001516

1
2

5 4

Reference:H1840-004006 Page:H041008

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Plate and Case (#15001-)
Index Code Part Number Description Qty Serial No.
1 22M-98-11171 Plate, ISO/BH Lever Control Pattern 1 15001-
2 09822-00020 Case 1 15001-
3 09822-03010 Plate, Warning, Lever Control Pattern 1 15001-
4 22M-98-11181 Plate, Warning, Control Pattern Change Over 1 15001-
5 22B-00-21410 Plate, ISO/BH Lever Control Pattern 1 15001-
6 22J-98-1A610 Plate, ISO/BH Lever Control Pattern 1 15001-

Reference:H1840-004006 Page:H041008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Spanish, USA, Without Blade
FIG. Name FIG. No.
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping H1840-010001
Proportional Pressure Control (PPC) Valve Piping, Band H1840-010002
Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (1/2) H1840-010003
Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#15001-16607) H1840-010004
Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#16608-) H1840-010004A
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304) H1840-010005
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-) H1840-010005A
Proportional Pressure Control (PPC) Valve Piping, Plate and Case H1840-010006

Reference:X22-1039800 Page:H042000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001546

31

15
16

17
5 1
14 30
6
18
2
19
3
20
4

29

28

30
14
2 29
28
18 3
4
1 13
19 6 810
20 12
15 7
17 9
10
16 11
5 27
22
24
26
21
2324
25

Reference:H1840-010001 Page:H042001

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-53521 Hose 1 21086-
A2 21W-62-53520 Hose 1 15001-21085
21U-62-34760 Band, Red 2 15001-
2 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
21U-62-34710 Band, Yellow 2 15001-
3 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
21U-62-34710 Band, Yellow 2 15001-
4 21W-62-51141 Hose 1 21086-
A2 21W-62-51140 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
5 21W-62-51122 Hose 1 21086-
A2 21W-62-51121 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
6 21W-62-51111 Hose 1 21086-
A2 21W-62-51110 Hose 1 15001-21085
21U-62-34710 Band, Yellow 2 15001-
21W-60-42201 Valve Assembly 1 15001-
7 20T-60-82320 Poppet 1 15001-
8 21W-62-44770 Body 1 15001-
9 21W-62-44780 Nipple 1 15001-
10 07002-11423 O-ring 2 15001-
11 21W-62-42940 Nipple 1 15001-
12 21W-62-44740 Plug 1 15001-
13 02896-11008 O-ring 1 15001-
14 21W-62-51281 Hose 1 21086-
A2 21W-62-51280 Hose 1 15001-21085
Reference:H1840-010001 Page:H042001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
14 21U-62-34750 Band, Blue 2 15001-
21U-62-34730 Band, Green 2 15001-
15 21W-62-41611 Hose 1 21086-
A2 21W-62-41610 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
16 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
17 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
18 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
21U-62-34710 Band, Yellow 2 15001-
19 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
21U-62-34710 Band, Yellow 2 15001-
20 02774-00220 Hose 1 21086-
A2 02760-00220 Hose 1 15001-21085
21U-62-34770 Band, White 2 15001-
21W-60-42201 Valve Assembly 1 15001-
21 20T-60-82320 Poppet 1 15001-
22 21W-62-44770 Body 1 15001-
23 21W-62-44780 Nipple 1 15001-
24 07002-11423 O-ring 2 15001-
25 21W-62-42940 Nipple 1 15001-
26 21W-62-44740 Plug 1 15001-
27 02896-11008 O-ring 1 15001-
28 21W-62-51330 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
29 21W-62-51320 Hose 1 15001-
21U-62-34730 Band, Green 2 15001-
21U-62-34760 Band, Red 2 15001-
30 21W-62-51310 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
21U-62-34760 Band, Red 2 15001-
31 02761-00204 Hose, Face Seal Type 1 15001-

Reference:H1840-010001 Page:H042001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001419

13
7
16 14
8
5 12
6 11
15
2
3

1
15
9
10
4

15

Reference:H1840-010002 Page:H042002

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Band (#15001-)
Index Code Part Number Description Qty Serial No.
1 04434-51212 Clip 1 15001-
2 01010-81220 Bolt 1 15001-
3 01643-31232 Washer 1 15001-
4 21W-62-51991 Cover 1 15001-
5 04434-52312 Clip 1 15001-
6 07095-20318 Cushion 1 15001-
7 01010-81020 Bolt 1 15001-
8 01643-31032 Washer 1 15001-
9 01010-81020 Bolt 2 15001-
10 01643-31032 Washer 2 15001-
11 581-22-12760 Spacer 2 15001-
12 21W-62-42790 Cover 1 15001-
13 01010-81265 Bolt 2 15001-
14 01643-31232 Washer 2 15001-
15 08034-20536 Band 5 15001-
16 08034-20536 Band 1 15001-

Reference:H1840-010002 Page:H042002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001496

11

6 7 10 9

13 4

3 14 12

14
13
2

Reference:H1840-010003 Page:H042003

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (1/2) (#15001-)
Index Code Part Number Description Qty Serial No.
22P-62-12250 Valve Assembly 1 15001-
22L-62-24851 Valve Assembly 1 15001-
1 NY09000-1080B Plate, Name 1 15001-
2 NY16076-1030A Plate 1 15001-
3 NY16076-10400 Collar 1 15001-
4 NY16229-10100 Plate 1 15001-
5 NY16229-10200 Plate 1 15001-
6 NY16229-10300 Lever 1 15001-
7 NY16229-10400 Collar 1 15001-
8 NY81900-00079 Bolt 1 15001-
9 NY81900-00081 Bolt, Wing 1 15001-
10 NY83110-30080 Nut 1 15001-
11 NY84110-00248 Screw 2 15001-
12 NY84230-51335 Pin 1 15001-
13 NY86786-01019 O-ring 2 15001-
14 NY86900-60062 O-ring 2 15001-

Reference:H1840-010003 Page:H042003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001535
17

13 13 18
14
9 11
8 12 16
10 14
11
9 8
10
10 10

6
18 3
6
7 3
27
15
7 1 2
5
1 12
6
16 15
6 25
7
17 26
4
7 24

4
19

20
24
26
25 22
23

21

28

Reference:H1840-010004 Page:H042004

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#15001-16607)
Index Code Part Number Description Qty Serial No.
22P-62-12250 Valve Assembly 1 15001-@
1 20U-Y14-1550 Elbow 2 15001-@
2 22P-62-13350 Adapter 2 15001-@
3 07000-12014 O-ring 4 15001-@
4 02782-10210 Elbow 2 15001-@
5 07002-11423 O-ring 2 15001-@
6 22M-62-15590 Joint 4 15001-@
7 02896-11008 O-ring 4 15001-@
8 22P-62-13350 Adapter 2 15001-@
9 22P-62-13360 Elbow 2 15001-@
10 07000-12014 O-ring 4 15001-@
11 07002-11423 O-ring 2 15001-@
12 21W-62-42940 Nipple 2 15001-@
13 201-62-75420 Elbow 2 15001-@
14 07002-11423 O-ring 2 15001-@
15 21U-62-34710 Band, Yellow 2 15001-@
16 21U-62-34720 Band, Black 2 15001-@
17 21U-62-34730 Band, Green 2 15001-@
18 21U-62-34740 Band, Orange 2 15001-@
19 01010-81025 Bolt 2 15001-@
20 01643-31032 Washer 2 15001-@
21 21W-62-51190 Bracket 1 15001-16607
22 01010-81225 Bolt 2 15001-@
23 01643-31232 Washer 2 15001-@
24 22P-62-13670 Bracket 2 15001-@
25 01010-81020 Bolt 4 15001-@
26 01643-31032 Washer 4 15001-@
27 08034-20536 Band 1 15001-@
28 22L-98-22910 Wrench 1 15001-@

Reference:H1840-010004 Page:H042004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006883
17

13 13 18
14
9 11
8 12 16
10 14
11
9 8
10
10 10

6
18 3
6
7 3
15 27
7 1 2
5
1 12
6
16 15
6
7 25
17 4 26
7 24
4
19

20
24
26
22
25
23

21

28

Reference:H1840-010004A Page:H042005

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#16608-)
Index Code Part Number Description Qty Serial No.
22P-62-12250 Valve Assembly 1 15001-
1 20U-Y14-1550 Elbow 2 15001-
2 22P-62-13350 Adapter 2 15001-
3 07000-12014 O-ring 4 15001-
4 02782-10210 Elbow 2 15001-
5 07002-11423 O-ring 2 15001-
6 22M-62-15590 Joint 4 15001-
7 02896-11008 O-ring 4 15001-
8 22P-62-13350 Adapter 2 15001-
9 22P-62-13360 Elbow 2 15001-
10 07000-12014 O-ring 4 15001-
11 07002-11423 O-ring 2 15001-
12 21W-62-42940 Nipple 2 15001-
13 201-62-75420 Elbow 2 15001-
14 07002-11423 O-ring 2 15001-
15 21U-62-34710 Band, Yellow 2 15001-
16 21U-62-34720 Band, Black 2 15001-
17 21U-62-34730 Band, Green 2 15001-
18 21U-62-34740 Band, Orange 2 15001-
19 01010-81025 Bolt 2 15001-
20 01643-31032 Washer 2 15001-
21 21W-62-51191 Bracket 1 16608-
22 01010-81225 Bolt 2 15001-
23 01643-31232 Washer 2 15001-
24 22P-62-13670 Bracket 2 15001-
25 01010-81020 Bolt 4 15001-
26 01643-31032 Washer 4 15001-
27 08034-20536 Band 1 15001-20775
28 22L-98-22910 Wrench 1 15001-

Reference:H1840-010004A Page:H042005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001425
5
21
22

5
23 21 6 21
21
4 22
23

22
23
21
7 8 5
9 21
23
22

21 23 22
10 2
22 21
21
11 22
22
1
22 21
1 21 24
14
23

22 19
29
22 21 12 16
3 21 13 15
1 21 28 21 20 18
17
22
24 21 27 30
12 13
14 25
19
16 26
15
18
17
22

Reference:H1840-010005 Page:H042006

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 5 15001-@
2 02782-1021A Elbow 1 15001-@
3 20Y-62-27680 Adapter 1 15001-@
4 21J-62-22110 Elbow 1 15001-@
5 20Y-62-58480 Elbow 3 15001-@
6 11Y-62-12490 Union 1 15001-@
21W-62-51820 Valve Assembly 1 15001-@
7 20T-60-82320 Poppet 1 15001-@
8 21W-62-44740 Plug 1 15001-@
9 21W-62-51830 Tee 1 15001-@
10 21W-62-43930 Nipple 1 15001-@
11 21W-62-42671 Tee 1 15001-@
21W-60-52301 Valve Assembly 2 16305-@
A2 21W-60-52300 Valve Assembly 2 15001-16304
12 20T-60-82320 Poppet 1 15001-@
13 21W-60-52310 Plug 1 16305-@
A2 21W-62-44740 Plug 1 15001-16304
14 21W-62-51770 Tee 1 15001-@
21W-60-52400 Valve Assembly 2 15001-16304
15 21W-62-44760 Body 1 15001-16304
16 07002-11423 O-ring 1 15001-16304
17 21W-62-43930 Nipple 1 15001-16304
18 07002-11423 O-ring 1 15001-16304
19 20B-27-11210 Bleeder 2 15001-@
20 11Y-62-12490 Union 1 15001-@
21 07002-11423 O-ring 20 15001-16304
22 02896-11008 O-ring 15 15001-@
23 206-06-61130 Switch, Pressure 6 15001-@
24 7861-93-1840 Sensor, Pressure 2 15001-@
07000-12011 O-ring 1 15001-@
Reference:H1840-010005 Page:H042006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
25 02782-10313 Elbow 1 15001-@
26 07002-11823 O-ring 1 15001-@
27 02896-11009 O-ring 1 15001-@
28 21W-62-45930 Elbow 1 15001-@
29 07002-11423 O-ring 1 15001-@
30 7861-93-1812 Sensor, Pressure 1 15950-@
A2 7861-93-1811 Sensor, Pressure 1 15001-15949
07002-61823 O-ring 1 15950-@
07002-11823 O-ring 1 15001-15949

Reference:H1840-010005 Page:H042006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006687
6
22
25

6
27 23 7 23
21
5 26
27

24
27
21
8 9 6
10 22
27
25

23 27 25
11 3
24 22
21
12 25
24
1
26 22
1 21 28
15
27 23
26 19
33
14
26 23 18
4 20 17
2 23 32 13
28 31 16
34 26
23
15 29
19 14
18 30
17
13
16
26

Reference:H1840-010005A Page:H042007

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 4 15001-
2 02782-10210 Elbow 1 15001-
3 02782-1021A Elbow 1 15001-
4 20Y-62-27680 Adapter 1 15001-
5 21J-62-22110 Elbow 1 15001-
6 20Y-62-58480 Elbow 3 15001-
7 11Y-62-12490 Union 1 15001-
21W-62-51820 Valve Assembly 1 15001-
8 20T-60-82320 Poppet 1 15001-
9 21W-62-44740 Plug 1 15001-
10 21W-62-51830 Tee 1 15001-
11 21W-62-43930 Nipple 1 15001-
12 21W-62-42671 Tee 1 15001-
21W-60-52301 Valve Assembly 2 16305-
13 20T-60-82320 Poppet 1 15001-
14 21W-60-52310 Plug 1 16305-
15 21W-62-51770 Tee 1 15001-
16 21W-62-44770 Body 1 16305-
17 21W-62-44780 Nipple 1 16305-
18 07002-11423 O-ring 2 16305-
19 20B-27-11210 Bleeder 2 15001-
20 11Y-62-12490 Union 1 15001-
21 07002-11423 O-ring 5 15001-
22 07002-11423 O-ring 5 15001-
23 07002-11423 O-ring 8 15001-
24 02896-11008 O-ring 3 15001-
25 02896-11008 O-ring 5 15001-
26 02896-11008 O-ring 7 15001-
27 206-06-61130 Switch, Pressure 6 15001-
28 7861-93-1840 Sensor, Pressure 2 15001-
Reference:H1840-010005A Page:H042007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
28 07000-12011 O-ring 1 15001-
29 02782-10313 Elbow 1 15001-
30 07002-11823 O-ring 1 15001-
31 02896-11009 O-ring 1 15001-
32 21W-62-45930 Elbow 1 15001-
33 07002-11423 O-ring 1 15001-
34 7861-93-1812 Sensor, Pressure 1 15950-
07002-61823 O-ring 1 15950-

Reference:H1840-010005A Page:H042007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001516

1
2

5 4

Reference:H1840-010006 Page:H042008

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Plate and Case (#15001-)
Index Code Part Number Description Qty Serial No.
1 22B-00-11810 Plate 1 15001-
2 09822-00020 Case 1 15001-
3 09822-01010 Plate, Warning, Lever Control Pattern 1 15001-
4 22B-00-11781 Plate 1 15001-
5 21W-00-51410 Plate 1 15001-
6 22J-98-1A610 Plate, ISO/BH Lever Control Pattern 1 15001-

Reference:H1840-010006 Page:H042008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Spanish, USA, With Blade
FIG. Name FIG. No.
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping H1840-011001
Proportional Pressure Control (PPC) Valve Piping, Band H1840-011002
Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (1/2) H1840-011003
Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#15001-16607) H1840-011004
Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#16608-) H1840-011004A
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304) H1840-011005
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-) H1840-011005A
Proportional Pressure Control (PPC) Valve Piping, Plate and Case H1840-011006

Reference:X22-1039810 Page:H043000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001458

31

15
16

17
5 1
14 30
6
2 18
19
3
8 22
21
7 20
4

29

28
7
21

28
3014
2
29
18 20
4 27 23 2624
26 25

19 3

1 13 9 12
6 1012
5 11
15 17 16

Reference:H1840-011001 Page:H043001

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-53521 Hose 1 21086-
A2 21W-62-53520 Hose 1 15001-21085
21U-62-34760 Band, Red 2 15001-
2 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
21U-62-34710 Band, Yellow 2 15001-
3 21W-62-51151 Hose 1 21086-
A2 21W-62-51150 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
21U-62-34710 Band, Yellow 2 15001-
4 21W-62-51141 Hose 1 21086-
A2 21W-62-51140 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
5 21W-62-51122 Hose 1 21086-
A2 21W-62-51121 Hose 1 15001-21085
21U-62-34740 Band, Orange 2 15001-
6 21W-62-51111 Hose 1 21086-
A2 21W-62-51110 Hose 1 15001-21085
21U-62-34710 Band, Yellow 2 15001-
7 21W-62-53171 Hose 1 21086-
A2 21W-62-53170 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
21U-62-34730 Band, Green 2 15001-
8 20U-62-22190 O-ring 1 15001-
21W-60-43200 Valve Assembly 1 15001-
9 21W-62-43930 Nipple 1 15001-
10 21W-62-44750 Body 1 15001-
11 21W-62-42940 Nipple 1 15001-
12 07002-11423 O-ring 2 15001-
Reference:H1840-011001 Page:H043001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
13 02896-11008 O-ring 1 15001-
14 21W-62-51281 Hose 1 21086-
A2 21W-62-51280 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
21U-62-34730 Band, Green 2 15001-
15 21W-62-41611 Hose 1 21086-
A2 21W-62-41610 Hose 1 15001-21085
21U-62-34750 Band, Blue 2 15001-
16 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34730 Band, Green 2 15001-
17 21W-62-41522 Hose 1 21086-
A2 21W-62-41521 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
18 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34720 Band, Black 2 15001-
21U-62-34710 Band, Yellow 2 15001-
19 21W-62-41452 Hose 1 21086-
A2 21W-62-41451 Hose 1 15001-21085
21U-62-34780 Band, Brown 2 15001-
21U-62-34710 Band, Yellow 2 15001-
20 02774-00220 Hose 1 21086-
A2 02760-00220 Hose 1 15001-21085
21U-62-34770 Band, White 2 15001-
21 21W-62-53272 Hose 1 21086-
A2 21W-62-53271 Hose 1 15001-21085
21U-62-34760 Band, Red 2 15001-
21U-62-34720 Band, Black 2 15001-
22 20U-62-22190 O-ring 1 15001-
21W-60-43200 Valve Assembly 1 15001-
23 21W-62-43930 Nipple 1 15001-
24 21W-62-44750 Body 1 15001-
25 21W-62-42940 Nipple 1 15001-
26 07002-11423 O-ring 2 15001-
27 02896-11008 O-ring 1 15001-
28 21W-62-51330 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
29 21W-62-51320 Hose 1 15001-
21U-62-34730 Band, Green 2 15001-
21U-62-34760 Band, Red 2 15001-
30 21W-62-51310 Hose 1 15001-
21U-62-34710 Band, Yellow 2 15001-
21U-62-34760 Band, Red 2 15001-
31 02761-00204 Hose, Face Seal Type 1 15001-

Reference:H1840-011001 Page:H043001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001461

7 13
17 8 14
5 12
6
11

16

16
2 1
3
16
9
10

15

16

Reference:H1840-011002 Page:H043002

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Band (#15001-)
Index Code Part Number Description Qty Serial No.
1 04434-51212 Clip 1 15001-
2 01010-81220 Bolt 1 15001-
3 01643-31232 Washer 1 15001-
4 21W-62-51991 Cover 1 15001-
5 04434-52312 Clip 1 15001-
6 07095-20318 Cushion 1 15001-
7 01010-81020 Bolt 1 15001-
8 01643-31032 Washer 1 15001-
9 01010-81020 Bolt 2 15001-
10 01643-31032 Washer 2 15001-
11 581-22-12760 Spacer 2 15001-
12 21W-62-42790 Cover 1 15001-
13 01010-81265 Bolt 2 15001-
14 01643-31232 Washer 2 15001-
15 04435-51010 Clip 1 15001-
16 08034-20536 Band 5 15001-
17 08034-20536 Band 1 15001-

Reference:H1840-011002 Page:H043002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001496

11

6 7 10 9

13 4

3 14 12

14
13
2

Reference:H1840-011003 Page:H043003

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (1/2) (#15001-)
Index Code Part Number Description Qty Serial No.
22P-62-12250 Valve Assembly 1 15001-
22L-62-24851 Valve Assembly 1 15001-
1 NY09000-1080B Plate, Name 1 15001-
2 NY16076-1030A Plate 1 15001-
3 NY16076-10400 Collar 1 15001-
4 NY16229-10100 Plate 1 15001-
5 NY16229-10200 Plate 1 15001-
6 NY16229-10300 Lever 1 15001-
7 NY16229-10400 Collar 1 15001-
8 NY81900-00079 Bolt 1 15001-
9 NY81900-00081 Bolt, Wing 1 15001-
10 NY83110-30080 Nut 1 15001-
11 NY84110-00248 Screw 2 15001-
12 NY84230-51335 Pin 1 15001-
13 NY86786-01019 O-ring 2 15001-
14 NY86900-60062 O-ring 2 15001-

Reference:H1840-011003 Page:H043003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001535
17

13 13 18
14
9 11
8 12 16
10 14
11
9 8
10
10 10

6
18 3
6
7 3
27
15
7 1 2
5
1 12
6
16 15
6 25
7
17 26
4
7 24

4
19

20
24
26
25 22
23

21

28

Reference:H1840-011004 Page:H043004

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#15001-16607)
Index Code Part Number Description Qty Serial No.
22P-62-12250 Valve Assembly 1 15001-@
1 20U-Y14-1550 Elbow 2 15001-@
2 22P-62-13350 Adapter 2 15001-@
3 07000-12014 O-ring 4 15001-@
4 02782-10210 Elbow 2 15001-@
5 07002-11423 O-ring 2 15001-@
6 22M-62-15590 Joint 4 15001-@
7 02896-11008 O-ring 4 15001-@
8 22P-62-13350 Adapter 2 15001-@
9 22P-62-13360 Elbow 2 15001-@
10 07000-12014 O-ring 4 15001-@
11 07002-11423 O-ring 2 15001-@
12 21W-62-42940 Nipple 2 15001-@
13 201-62-75420 Elbow 2 15001-@
14 07002-11423 O-ring 2 15001-@
15 21U-62-34710 Band, Yellow 2 15001-@
16 21U-62-34720 Band, Black 2 15001-@
17 21U-62-34730 Band, Green 2 15001-@
18 21U-62-34740 Band, Orange 2 15001-@
19 01010-81025 Bolt 2 15001-@
20 01643-31032 Washer 2 15001-@
21 21W-62-51190 Bracket 1 15001-16607
22 01010-81225 Bolt 2 15001-@
23 01643-31232 Washer 2 15001-@
24 22P-62-13670 Bracket 2 15001-@
25 01010-81020 Bolt 4 15001-@
26 01643-31032 Washer 4 15001-@
27 08034-20536 Band 1 15001-@
28 22L-98-22910 Wrench 1 15001-@

Reference:H1840-011004 Page:H043004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006883
17

13 13 18
14
9 11
8 12 16
10 14
11
9 8
10
10 10

6
18 3
6
7 3
15 27
7 1 2
5
1 12
6
16 15
6
7 25
17 4 26
7 24
4
19

20
24
26
22
25
23

21

28

Reference:H1840-011004A Page:H043005

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Pattern Change Over Valve (2/2) (#16608-)
Index Code Part Number Description Qty Serial No.
22P-62-12250 Valve Assembly 1 15001-
1 20U-Y14-1550 Elbow 2 15001-
2 22P-62-13350 Adapter 2 15001-
3 07000-12014 O-ring 4 15001-
4 02782-10210 Elbow 2 15001-
5 07002-11423 O-ring 2 15001-
6 22M-62-15590 Joint 4 15001-
7 02896-11008 O-ring 4 15001-
8 22P-62-13350 Adapter 2 15001-
9 22P-62-13360 Elbow 2 15001-
10 07000-12014 O-ring 4 15001-
11 07002-11423 O-ring 2 15001-
12 21W-62-42940 Nipple 2 15001-
13 201-62-75420 Elbow 2 15001-
14 07002-11423 O-ring 2 15001-
15 21U-62-34710 Band, Yellow 2 15001-
16 21U-62-34720 Band, Black 2 15001-
17 21U-62-34730 Band, Green 2 15001-
18 21U-62-34740 Band, Orange 2 15001-
19 01010-81025 Bolt 2 15001-
20 01643-31032 Washer 2 15001-
21 21W-62-51191 Bracket 1 16608-
22 01010-81225 Bolt 2 15001-
23 01643-31232 Washer 2 15001-
24 22P-62-13670 Bracket 2 15001-
25 01010-81020 Bolt 4 15001-
26 01643-31032 Washer 4 15001-
27 08034-20536 Band 1 15001-20775
28 22L-98-22910 Wrench 1 15001-

Reference:H1840-011004A Page:H043005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001456
5
20
21

5
22 20 6 20
20
4
22

21 21
20 22
9 10
22 11 20
5

21
20
22 21
12
21 2
20
1
20
13 21
21 20
1 20 23
14 19
21 20
23
21 20
22 17 16
28
17 18
14 22 8 16 15
27 21
7
19 18
26 29 20
15
21 20 21
24

25
22
7 8
21

21 20
3
20
1

Reference:H1840-011005 Page:H043006

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 5 15001-@
2 02782-1021A Elbow 1 15001-@
3 20Y-62-27680 Adapter 1 15001-@
4 21J-62-22110 Elbow 1 15001-@
5 20Y-62-58480 Elbow 3 15001-@
6 11Y-62-12490 Union 1 15001-@
7 22B-62-17450 Elbow 2 15001-@
8 20Y-62-22160 Adapter 2 15001-@
21W-62-51820 Valve Assembly 1 15001-@
9 20T-60-82320 Poppet 1 15001-@
10 21W-62-44740 Plug 1 15001-@
11 21W-62-51830 Tee 1 15001-@
12 21W-62-43930 Nipple 1 15001-@
13 21W-62-42671 Tee 1 15001-@
21W-60-53401 Valve Assembly 2 16305-@
A2 21W-60-53400 Valve Assembly 2 15001-16304
14 21W-62-51770 Tee 1 15001-@
15 21W-62-44780 Nipple 1 16305-@
A2 21W-62-43930 Nipple 1 15001-16304
16 21W-62-44740 Plug 1 15001-@
17 20T-60-82320 Poppet 1 15001-@
18 07002-11423 O-ring 1 15001-@
19 20B-27-11210 Bleeder 2 15001-@
20 07002-11423 O-ring 21 15001-@
21 02896-11008 O-ring 17 15001-@
22 206-06-61130 Switch, Pressure 8 15001-@
23 7861-93-1840 Sensor, Pressure 2 15001-@
07000-12011 O-ring 1 15001-@
24 02782-10315 Elbow 1 15001-@
25 07002-12034 O-ring 1 15001-@
Reference:H1840-011005 Page:H043006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#15001-16304)
Index Code Part Number Description Qty Serial No.
26 02896-11009 O-ring 1 15001-@
27 21W-62-45930 Elbow 1 15001-@
28 07002-11423 O-ring 1 15001-@
29 7861-93-1812 Sensor, Pressure 1 15950-@
A2 7861-93-1811 Sensor, Pressure 1 15001-15949
07002-61823 O-ring 1 15950-@
07002-11823 O-ring 1 15001-15949

Reference:H1840-011005 Page:H043006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006681
6
23
26

6
29 23 7 23
22
5
28

25 26
24 29
10 11
28 12 23
6

26
24
29 27
13
25 3
23
2
14 22 27
25 22
1 23 30
23 15 21
25
30
25
29 24
35 17
20
15 29 9 16
34 18
21 17 25 8 19
20 36 23 27
33
16 27
18 22 31
19
32

29
8 9
26

26 22
4
22
1

Reference:H1840-011005A Page:H043007

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
1 02782-10210 Elbow 4 15001-
2 02782-10210 Elbow 1 15001-
3 02782-1021A Elbow 1 15001-
4 20Y-62-27680 Adapter 1 15001-
5 21J-62-22110 Elbow 1 15001-
6 20Y-62-58480 Elbow 3 15001-
7 11Y-62-12490 Union 1 15001-
8 22B-62-17450 Elbow 2 15001-
9 20Y-62-22160 Adapter 2 15001-
21W-62-51820 Valve Assembly 1 15001-
10 20T-60-82320 Poppet 1 15001-
11 21W-62-44740 Plug 1 15001-
12 21W-62-51830 Tee 1 15001-
13 21W-62-43930 Nipple 1 15001-
14 21W-62-42671 Tee 1 15001-
21W-60-53401 Valve Assembly 2 16305-
15 21W-62-51770 Tee 1 15001-
16 21W-62-44780 Nipple 1 16305-
17 21W-62-44740 Plug 1 15001-
18 20T-60-82320 Poppet 1 15001-
19 21W-62-44770 Body 1 16305-
20 07002-11423 O-ring 1 15001-
21 20B-27-11210 Bleeder 2 15001-
22 07002-11423 O-ring 8 15001-
23 07002-11423 O-ring 8 15001-
24 07002-11423 O-ring 5 15001-
25 02896-11008 O-ring 7 15001-
26 02896-11008 O-ring 5 15001-
27 02896-11008 O-ring 5 15001-
28 206-06-61130 Switch, Pressure 2 15001-
Reference:H1840-011005A Page:H043007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Proportional Pressure Control (PPC) Valve Piping, Control Valve Related Parts (#16305-)
Index Code Part Number Description Qty Serial No.
29 206-06-61130 Switch, Pressure 6 15001-
30 7861-93-1840 Sensor, Pressure 2 15001-
07000-12011 O-ring 1 15001-
31 02782-10315 Elbow 1 15001-
32 07002-12034 O-ring 1 15001-
33 02896-11009 O-ring 1 15001-
34 21W-62-45930 Elbow 1 15001-
35 07002-11423 O-ring 1 15001-
36 7861-93-1812 Sensor, Pressure 1 15950-
07002-61823 O-ring 1 15950-

Reference:H1840-011005A Page:H043007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001516

1
2

5 4

Reference:H1840-011006 Page:H043008

PC78US-8 S/N 15001-UP


Proportional Pressure Control (PPC) Valve Piping, Plate and Case (#15001-)
Index Code Part Number Description Qty Serial No.
1 22B-00-11810 Plate 1 15001-
2 09822-00020 Case 1 15001-
3 09822-01010 Plate, Warning, Lever Control Pattern 1 15001-
4 22B-00-11781 Plate 1 15001-
5 21W-00-51410 Plate 1 15001-
6 22J-98-1A610 Plate, ISO/BH Lever Control Pattern 1 15001-

Reference:H1840-011006 Page:H043008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
FRAME AND ITS RELATED PARTS
Unit Name Unit No.
Revolving Frame X22-1034791
Revolving Frame, With Battery Disconnect Switch X22-1091850
Boom Foot Pin, Without Arm Crane X22-0826600

Reference: Page:J000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Revolving Frame
FIG. Name FIG. No.
Revolving Frame, (#15001-15239) J1110-001001
Revolving Frame, (#15240-) J1110-001001A

Reference:X22-1034791 Page:J001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001376
9
10
8

2 7
4
3

Reference:J1110-001001 Page:J001001

PC78US-8 S/N 15001-UP


Revolving Frame, (#15001-15239)
Index Code Part Number Description Qty Serial No.
1 21W-46-51111 Frame 1 15001-15239
2 21W-46-51121 Plate 1 15001-@
3 01010-82055 Bolt 4 15001-@
4 01643-32060 Washer 4 15001-@
5 22P-46-11190 Sheet 1 15001-@
6 22P-46-11161 Sheet 1 15001-@
7 22P-06-11491 Sheet 1 15001-@
8 21W-46-51131 Bracket 1 15001-@
9 01010-81235 Bolt 3 15001-@
10 01643-31232 Washer 3 15001-@

Reference:J1110-001001 Page:J001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002166
9
10
8
11

12 5

6
11
1
12

2 7
4
3

Reference:J1110-001001A Page:J001002

PC78US-8 S/N 15001-UP


Revolving Frame, (#15240-)
Index Code Part Number Description Qty Serial No.
1 21W-46-51114 Frame 1 17344-
A2 21W-46-51113 Frame 1 15388-17343
A2 21W-46-51112 Frame 1 15240-15387
2 21W-46-51121 Plate 1 15001-
3 01010-82055 Bolt 4 15001-
4 01643-32060 Washer 4 15001-
5 22P-46-11190 Sheet 1 15001-
6 22P-46-11161 Sheet 1 15001-
7 22P-06-11491 Sheet 1 15001-
8 21W-46-51131 Bracket 1 15001-
9 01010-81235 Bolt 3 15001-
10 01643-31232 Washer 3 15001-
11 01010-81016 Bolt 2 15240-
12 01643-31032 Washer 2 15240-

Reference:J1110-001001A Page:J001002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Revolving Frame, With Battery Disconnect Switch
FIG. Name FIG. No.
Revolving Frame J1110-002001

Reference:X22-1091850 Page:J002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA009098
9
10
8

1 11

12

2 7
4
3

Reference:J1110-002001 Page:J002001

PC78US-8 S/N 15001-UP


Revolving Frame (#15240-)
Index Code Part Number Description Qty Serial No.
1 21W-46-51114 Frame 1 17344-
A2 21W-46-51113 Frame 1 15388-17343
A2 21W-46-51112 Frame 1 15240-15387
2 21W-46-51121 Plate 1 15240-
3 01010-82055 Bolt 4 15240-
4 01643-32060 Washer 4 15240-
5 22P-46-11190 Sheet 1 15240-
6 22P-46-11161 Sheet 1 15240-
7 22P-06-12410 Sheet 1 15240-
8 21W-46-51131 Bracket 1 15240-
9 01010-81235 Bolt 3 15240-
10 01643-31232 Washer 3 15240-
11 01010-81016 Bolt 1 15240-
12 01643-31032 Washer 1 15240-

Reference:J1110-002001 Page:J002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Boom Foot Pin, Without Arm Crane
FIG. Name FIG. No.
Boom Foot Pin J1310-001001

Reference:X22-0826600 Page:J003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001380
5
6
4 2

1 3

10
11
9
8

12
13

Reference:J1310-001001 Page:J003001

PC78US-8 S/N 15001-UP


Boom Foot Pin (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-70-42510 Pin 1 15001-
2 21W-70-41930 Spacer, T=1.0mm 2 15001-
3 21W-70-41940 Spacer, T=1.5mm 1 15001-
4 205-70-66580 Plate 1 15001-
5 01010-81230 Bolt 2 15001-
6 01643-31232 Washer 2 15001-
7 22F-46-11240 Cap 1 15001-
8 21W-70-21220 Pin 1 15001-
9 205-70-66580 Plate 1 15001-
10 01010-81230 Bolt 2 15001-
11 01643-31232 Washer 2 15001-
12 21Y-70-14710 Spacer, T=1.0mm 1 15001-
13 21Y-70-14850 Spacer, T=2.0mm 1 15001-

Reference:J1310-001001 Page:J003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
OPERATOR'S COMPARTMENT AND CONTROL SYSTEM
Unit Name Unit No.
Operator's Seat, Suspension Type, Reclining X22-1031861
Seat Belt, 78mm Width X21-0732700
Seat Belt, 50mm Width X21-1045180
Operator's Seat Rear Cover, Without 12volt Power Supply X22-1031881
Cab, R.H. and Rear Fixed Window Type X22-1039270
Cab, R.H. and Rear Fixed Window Type, For EU Arrangement X22-1090380
Head Guard X22-1031961
Front Guard, EC Regulation LV1 X22-1031991
Front Guard, EC Regulation LV2 X22-1031981
Front Guard, Half X22-1032000
Floor Mat, For Machine With 1-Additional Actuator Piping X22-1031911
Floor Mat, Without 1-Additional Actuator Piping X22-1035381
Sunvisor X22-0930430
Window Washer Tank, Without Ceiling Window Wiper X22-1035931
Air Conditioner Unit X22-1036301
Fire Extinguisher X21-0831291
Floor Frame, With Blade, AM-FM Radio, EU X22-1095480
Floor Frame, With Blade, AM-FM Radio, EU, Overload Alarm X22-1095500
Floor Frame, With Blade, AM-FM Radio, EU, 1-Additional Actuator Piping X22-1095460
Floor Frame, With Blade, AM-FM Radio, EU, 1-Additional Actuator Piping, Overload Alarm X22-1095520
Floor Frame, With Blade, AM-FM Radio, North America X22-1039300
Floor Frame, With Blade, AM-FM Radio, North America, 1-Additional Actuator Piping X22-1039200
Floor Mounting X22-1031531
Front Cover X22-1090700

Reference: Page:K000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Operator's Seat, Suspension Type, Reclining
FIG. Name FIG. No.
Operator's Seat, Inner Parts K0110-001001
Operator's Seat, Mounting K0110-001002

Reference:X22-1031861 Page:K001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA007685
11

10

1 6
5

3
4

13
19
8

9 14
16

17
12
15

20
18

Reference:K0110-001001 Page:K001001

PC78US-8 S/N 15001-UP


Operator's Seat, Inner Parts (#15001-)
Index Code Part Number Description Qty Serial No.
22P-57-11202 Operator's Seat 1 15506-
A2 22P-57-11201 Operator's Seat 1 15001-15505
AS200069 Upper Kit, T5 1 15001-
1 AS195367 Back Seat Cover Kit 1 15001-
2 AS195369 Back Seat Foam Kit 1 15001-
3 AS195370 Seat Cover Kit 1 15001-
4 AS195372 Seat Foam Kit 1 15001-
5 AS199656 Frame Kit, T5 1 15506-
AS200072 Frame Kit, T5 1 15001-15505
6 AS190279 Handle Kit 1 15001-
7 AS195374 Headrest Kit 1 15001-
8 AS199657 Bracket Kit 1 15001-
9 AS200073 Adjuster Kit 1 15001-
10 AS196263 Armrest Kit 1 15001-
11 AS196264 Armrest Kit 1 15001-
12 AS200067 Suspension Kit, 57 1 15001-
13 AS164899 Damper Kit 1 15001-
14 AS166011 Bearing Kit 1 15001-
15 AS195389 Up Stop and Bump Stop Kit 1 15001-
16 AS195392 Weight Adjuster Kit 1 15001-
17 AS165989 Lever, Center Pivot Kit 1 15001-
18 AS200076 Plinth Kit 1 15001-
19 AS200074 Suspension Cover Kit 1 15001-
20 AS200075 Sliderail Stop Kit 1 15001-

Reference:K0110-001001 Page:K001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA007684

Reference:K0110-001002 Page:K001002

PC78US-8 S/N 15001-UP


Operator's Seat, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-D0825 Bolt 4 15001-
2 01643-70823 Washer 4 15001-

Reference:K0110-001002 Page:K001002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Seat Belt, 78mm Width
FIG. Name FIG. No.
Seat Belt K0160-001001

Reference:X21-0732700 Page:K002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000742

4 3
5 2

Reference:K0160-001001 Page:K002001

PC78US-8 S/N 15001-UP


Seat Belt (#15001-)
Index Code Part Number Description Qty Serial No.
1 22B-57-11911 Belt 1 15001-
2 02030-70751 Bolt 2 15001-
3 09409-00002 Washer, Spring 2 15001-
4 01643-11232 Washer 2 15001-
5 208-01-11270 Washer 1 15001-

Reference:K0160-001001 Page:K002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Seat Belt, 50mm Width
FIG. Name FIG. No.
Seat Belt K0160-002001

Reference:X21-1045180 Page:K003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY002097

Reference:K0160-002001 Page:K003001

PC78US-8 S/N 15001-UP


Seat Belt (#15001-)
Index Code Part Number Description Qty Serial No.
1 20Y-57-41910 Belt Kit 1 15001-
2 01643-11232 Washer 2 15001-

Reference:K0160-002001 Page:K003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Operator's Seat Rear Cover, Without 12volt Power Supply
FIG. Name FIG. No.
Operator's Seat Rear Cover K0180-001001

Reference:X22-1031881 Page:K004000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001386
1

8
7
6
5

4 3

9
10
11

16
17
18 18
17
16

15
12
13
14

Reference:K0180-001001 Page:K004001

PC78US-8 S/N 15001-UP


Operator's Seat Rear Cover (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-53-15391 Cover 1 15001-
2 22P-53-15330 Sheet 1 15001-
3 22P-53-15340 Sheet 1 15001-
4 20Y-53-13631 Cover Assembly 1 15001-
5 22U-43-22340 Puller 1 15001-
6 08041-01000 Fuse, 10Amp. 1 15001-
7 08041-02000 Fuse, 20Amp. 1 15001-
8 08041-03000 Fuse, 30Amp. 1 15001-
9 01010-D0616 Bolt 7 15001-
10 01643-70623 Washer 7 15001-
11 20Y-53-12310 Collar 7 15001-
12 22P-979-1751 Plate 1 15001-
13 01010-D0820 Bolt 2 15001-
14 01643-70823 Washer 2 15001-
15 22P-53-15351 Cover 1 15001-
16 01010-D0620 Bolt 3 15001-
17 01643-70623 Washer 3 15001-
18 20Y-53-12310 Collar 3 15001-

Reference:K0180-001001 Page:K004001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cab, R.H. and Rear Fixed Window Type
FIG. Name FIG. No.
Cab, Cab Body and Window K0210-003001
Cab, Front Window K0210-003002
Cab, Front Lower Window K0210-003003
Cab, Roof Ventilator K0210-003004
Cab, Door K0210-003005
Cab, Door Lock K0210-003006
Cab, Door Open Lock K0210-003007
Cab, Wiper and Room Lamp (#15001-28941) K0210-003008
Cab, Wiper and Room Lamp (#28942-) K0210-003008A
Cab, Radio Wiring Harness and Window Washer Hose and Working Lamp K0210-003009
Cab, Roof Cover, Hanger and Drink Holder K0210-003010
Cab, Air Intake and Grip K0210-003011
Cab, Plug K0210-003012
Cab, KOMTRAX Antenna (#15001-21093) K0210-003013
Cab, KOMTRAX Antenna (#21094-) K0210-003013A
Cab, KOMATSU Mark K0210-003014
Cab, Rear Cover and Rear Duct K0210-003015
Cab, KOMTRAX Controller K0210-003016

Reference:X22-1039270 Page:K005000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000717
4

5 6

2
1

Reference:K0210-003001 Page:K005001

PC78US-8 S/N 15001-UP


Cab, Cab Body and Window (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
1 C1 Cab 1 16150-
C1 Cab 1 15565-16149
C1 Cab 1 15001-15564
2 22P-53-18341 Glass 1 15001-
3 22P-53-18460 Seal 1 15001-
4 22P-53-18331 Glass 1 15001-
5 22P-53-18450 Seal 1 15001-
6 22P-53-18270 Glass 1 15001-
7 22P-53-18470 Seal 1 15001-

Reference:K0210-003001 Page:K005001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA013759
35 41
36 42

44
34 43

28 42
30 40 37
29
44 39
43
45

32 38
33
31
34 17

36
20 35
19
18 21

9
8 11
12
13
6
10
14 12 5
15 11 7
3 13
2 15
13 16
1
25

13
27 22
26

4
23
24

Reference:K0210-003002 Page:K005002

PC78US-8 S/N 15001-UP


Cab, Front Window (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
22P-53-00390 Window Assembly 1 28942-
A2 22P-53-00081 Window Assembly 1 15001-28941
1 22P-53-28311 Frame 1 28942-
A2 22P-53-18312 Frame 1 15001-28941
2 22P-53-18320 Glass 1 15001-
3 22P-53-18380 Seal 1 15001-
4 22P-53-18371 Seal 1 15001-
5 22B-54-15411 Lock Assembly 1 15001-
6 22B-54-15440 Case 1 15001-
7 22B-54-15470 Knob 1 15001-
8 22B-54-15421 Lock Assembly 1 15001-
9 22B-54-15450 Case 1 15001-
10 22B-54-15480 Knob 1 15001-
11 01010-D0816 Bolt 4 15001-
12 208-53-11330 Washer 4 15001-
13 22B-54-28591 Roller 4 15001-
14 22B-54-15560 Stopper 1 15001-
15 01580-11008 Nut 2 15001-
16 20Y-54-65540 Cap 1 15001-
17 22P-53-28511 Plate 1 28942-
A2 22P-53-18511 Plate 1 15001-28941
18 01435-41020 Bolt 4 15001-
19 01240-00616 Screw 1 15001-
20 22P-53-18521 Bracket 1 15001-
21 01435-40616 Bolt 3 15001-
22 22P-53-18531 Block 1 15001-
Reference:K0210-003002 Page:K005002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cab, Front Window (#15001-)
Index Code Part Number Description Qty Serial No.
23 01252-80616 Bolt 2 15001-
24 01641-50608 Washer 2 15001-
25 20Y-54-52192 Block 1 15001-
26 01252-80616 Bolt 2 15001-
27 01641-50608 Washer 2 15001-
28 22B-54-15682 Block 1 15001-
29 01252-80625 Bolt, Hexagon Socket Head 2 15001-
30 01643-70623 Washer 2 15001-
31 22B-54-28440 Stopper 1 15001-
32 01252-80616 Bolt 2 15001-
33 01643-70623 Washer 2 15001-
34 20Y-54-51621 Striker 2 15001-
35 20T-54-74550 Nut 2 15001-
36 01643-71032 Washer 4 28942-
01643-71032 Washer 2 15001-28941
37 21J-06-12440 Switch, Limit 1 15001-
38 01583-11811 Nut 1 15001-
39 01640-21826 Washer, Flat 1 15001-
40 22P-53-28480 Bracket 1 28942-
A2 22P-53-18481 Bracket 1 15001-28941
41 22P-53-18491 Bracket 1 15001-
42 01435-40616 Bolt 4 15001-
43 20Y-54-11611 Stopper 2 15001-
44 01580-11008 Nut 2 15001-
45 22B-54-28350 Seal 1 15001-

Reference:K0210-003002 Page:K005002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000719
18

19

11 16
12
13 17

14
15

6
7
5

3
10
1
8
4 7
6
9

Reference:K0210-003003 Page:K005003

PC78US-8 S/N 15001-UP


Cab, Front Lower Window (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
22P-53-18401 Glass Assembly 1 28942-
A2 22P-53-18400 Glass Assembly 1 15001-28941
1 22P-53-18410 Glass 1 15001-
2 22P-53-28530 Retainer 2 28942-
A2 22B-54-15970 Retainer 2 15001-28941
3 22B-54-15980 Knob 2 15001-
4 08037-02512 Grommet 2 15001-
5 22B-54-28421 Trim 1 15893-
22B-54-28420 Trim 1 15001-15892
6 208-53-11830 Seat 2 15001-
7 01023-70620 Screw 4 15001-
8 208-53-11830 Seat 2 15001-
9 22B-54-15580 Plate 4 15001-
10 01023-70620 Screw 4 15001-
11 20Y-53-12611 Seat 1 15001-
12 20Y-54-52651 Spacer 2 15001-
13 01023-70616 Screw 2 15001-
14 22B-54-15841 Lock Assembly 1 15001-
15 01435-40616 Bolt 2 15001-
16 208-53-12110 Seat 2 15001-
17 01640-20610 Washer 2 15001-
18 01252-80625 Bolt, Hexagon Socket Head 2 15001-
19 01643-70623 Washer 2 15001-

Reference:K0210-003003 Page:K005003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000720
6

2
1

14
11
12
13

5 8

10
20
16 9
15

18 15 16
19
17

Reference:K0210-003004 Page:K005004

PC78US-8 S/N 15001-UP


Cab, Roof Ventilator (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
1 22P-53-18541 Roof 1 15565-
22B-54-28511 Roof 1 15001-15564
2 22P-53-17D20 Hinge, Welded 2 15565-
208-53-11M50 Hinge, Welded 2 15001-15564
3 01584-30806 Nut 4 15001-
4 22B-54-28521 Cover 1 15001-
5 09416-10200 Rivet 5 15001-
6 22B-54-28531 Plate 1 15001-
7 22B-54-28540 Seal 1 15001-
8 20Y-54-14590 Handle 1 15001-
9 01245-00616 Screw 2 15001-
10 01643-70623 Washer 2 15001-
11 2A5-53-12970 Lock Assembly 1 21560-
A2 20Y-53-11721 Lock Assembly 1 15001-21559
12 20Y-53-11781 Knob 1 15001-
13 01435-40610 Bolt 3 15001-
14 20Y-53-11931 Cover 1 15001-
15 20Y-54-36342 Spring, Gas 2 15001-
16 04052-10833 Pin, Snap 4 15001-
17 20Y-53-11771 Striker 1 15001-
18 01245-00820 Screw 2 15001-
19 01643-70823 Washer 2 15001-
20 22B-54-28550 Seal 1 15001-

Reference:K0210-003004 Page:K005004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA013766

24
33
32
30
26 31

34
25

8
9 1
11
6 12
19 13
17 18 7 10
5

4
22
21
23
37
36

20
17 18
35
15
16 32
14
27
3
28 30
31 2
29
33

Reference:K0210-003005 Page:K005005

PC78US-8 S/N 15001-UP


Cab, Door (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
22P-53-00032 Door Assembly 1 28942-
A2 22P-53-00031 Door Assembly 1 15001-28941
1 C1 Door 1 15001-
2 22M-54-24260 Glass 1 15001-
3 22M-54-25470 Seal 1 15001-
4 22P-53-17272 Glass 1 15001-
5 22M-54-25460 Seal 1 15001-
6 22P-53-28520 Roller Assembly 1 28942-
A2 22P-53-17432 Roller Assembly 1 15893-28941
A2 22P-53-17431 Roller Assembly 1 15001-15892
7 20U-54-44920 Shim, T=1.2mm 1 15001-
8 01010-D0830 Bolt 2 15001-
9 01643-70823 Washer 2 15001-
10 22P-53-17420 Roller Assembly 1 15893-
A2 22M-54-27990 Roller Assembly 1 15001-15892
11 01010-D0816 Bolt 2 15001-
12 01641-50812 Washer, Flat 2 15001-
13 01643-70823 Washer 2 15001-
14 22P-53-17452 Roller Assembly 1 15001-
15 01010-D0816 Bolt 3 15001-
16 01643-70823 Washer 3 15001-
17 20U-54-25321 Striker 2 15001-
18 20U-54-25341 Shim, T=1.0mm 2 15001-
19 01435-00612 Bolt 2 15001-
20 01435-00612 Bolt 2 15001-
21 22P-53-28560 Cover 1 28942-
Reference:K0210-003005 Page:K005005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cab, Door (#15001-)
Index Code Part Number Description Qty Serial No.
21 A2 22M-54-24430 Cover 1 15001-28941
22 01023-20610 Screw 6 15001-
23 22P-53-17280 Packing 1 15001-
24 22P-53-17611 Bracket 1 15001-
25 01010-D1220 Bolt 2 15001-
26 01643-71232 Washer 2 15001-
27 22P-53-17621 Bracket 1 15001-
28 01010-D1230 Bolt 2 15001-
29 01643-71232 Washer 2 15001-
30 20U-54-25321 Striker 2 15001-
31 20U-54-25341 Shim, T=1.0mm 2 15001-
32 01435-00616 Bolt 4 15001-
33 01584-30605 Nut 4 15001-
34 22P-53-17461 Weather Strip 1 15001-
35 22M-54-14470 Handle 1 15001-
36 22P-53-17260 Grip 1 15001-
37 01252-80512 Bolt, Hexagon Socket Head 2 15001-

Reference:K0210-003005 Page:K005005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000722

28

29

9
22 26

26
5
3 8
25
27 7 6
4
15 13 10
16
19 27 21 24
17
11
26
26
26 27
20 14
27 26 24 23
18 2
12
25
1

Reference:K0210-003006 Page:K005006

PC78US-8 S/N 15001-UP


Cab, Door Lock (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
22P-53-00032 Door Assembly 1 28942-
A2 22P-53-00031 Door Assembly 1 15001-28941
1 20Y-54-14520 Lock Assembly 1 15001-
2 01435-00612 Bolt 2 15001-
3 20Y-54-14520 Lock Assembly 1 15001-
4 01435-00612 Bolt 2 15001-
5 22P-53-17231 Cover 1 15001-
6 01435-40610 Bolt 2 15001-
7 22P-53-17220 Lever Assembly 1 15001-
8 01435-00612 Bolt 3 15001-
9 22P-53-17241 Knob 1 15001-
10 22B-54-16211 Handle 1 15001-
11 22B-54-16330 Snap 1 15001-
12 01435-00610 Bolt 2 15001-
13 20Y-54-35890 Lock Assembly 1 15001-
14 22P-53-17311 Link Assembly 1 15001-
15 01435-00612 Bolt 3 15001-
16 22P-53-17551 Link Assembly 1 15001-
17 01435-00610 Bolt 2 15001-
18 22P-53-17590 Rod 1 15001-
19 22P-53-17580 Rod 1 15001-
20 22P-53-17541 Rod 1 15001-
21 22M-54-24351 Rod 1 15001-
22 22P-53-17361 Rod 1 15001-
23 22M-54-24370 Rod 1 15001-
24 205-54-71830 Snap 3 15001-
Reference:K0210-003006 Page:K005006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cab, Door Lock (#15001-)
Index Code Part Number Description Qty Serial No.
25 205-54-71840 Snap 2 15001-
26 22P-53-17560 Clip 6 15001-
27 22P-53-17520 Shim, T=0.80mm 5 15001-
28 22P-53-17471 Seal 1 15001-
29 22U-43-23290 Clip 2 15001-

Reference:K0210-003006 Page:K005006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA018083

26
20
19

25
23 22
21 22
15
14
4 4 11 18
10
10
7 26
13
12
14
11
8 3
2 5 9
5 1
6
4
10
16
25 24

4
10

17

Reference:K0210-003007 Page:K005007

PC78US-8 S/N 15001-UP


Cab, Door Open Lock (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
1 22P-53-17411 Rail 1 15001-
2 205-54-71731 Striker 1 15001-
3 20Y-54-35470 Striker 1 15001-
4 22B-54-16691 Striker 4 28942-
A2 22B-54-16690 Striker 4 15001-28941
5 20U-54-25190 Washer 4 15001-
6 01240-01025 Screw 2 15001-
7 20U-54-24661 Plate 1 15001-
8 20Y-54-35480 Shim, T=1.6mm 1 15001-
9 01240-01025 Screw 2 15001-
10 01435-40612 Bolt 8 15001-
11 22M-54-16550 Packing 4 15001-
12 01240-00820 Screw, Hexagon Socket Head 1 15001-
13 01643-70823 Washer 3 15001-
14 208-53-11330 Washer 4 15001-
15 01546-10812 Nut 3 15001-
16 01584-30806 Nut 1 15001-
17 22P-53-17150 Trim 1 15001-
18 22P-53-17441 Stopper 1 15001-
19 01010-D1225 Bolt 3 15001-
20 01643-71232 Washer 3 15001-
21 22M-54-24860 Stopper, L=45mm 2 15001-
22 20U-54-25231 Nut 4 15001-
23 22B-54-16680 Stopper 1 15001-
24 20Y-54-11611 Stopper 1 15001-
25 01580-11008 Nut 2 15001-
Reference:K0210-003007 Page:K005007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cab, Door Open Lock (#15001-)
Index Code Part Number Description Qty Serial No.
26 22B-54-17290 Seal 2 28942-

Reference:K0210-003007 Page:K005007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000724

11

12
13

5 9
10
7
6
8
2
1

4 3

Reference:K0210-003008 Page:K005008

PC78US-8 S/N 15001-UP


Cab, Wiper and Room Lamp (#15001-28941)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-@
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
1 22B-54-28731 Wiper Motor Assembly 1 15001-28941
2 01435-00616 Bolt 6 15001-28941
3 08034-20414 Band, Black 1 15001-28941
22B-54-28710 Wiper Assembly 1 15001-@
4 22B-54-28720 Arm, Wiper 1 15001-@
5 20Y-54-39450 Wiper Blade 1 15001-@
6 20Y-54-39460 Slider 1 15001-@
7 20Y-54-39480 Plate 1 15001-@
8 ND949007-2350 Screw and Washer 2 15001-@
9 20Y-53-12233 Stopper 1 19352-@
A2 20Y-53-12232 Stopper 1 15001-19351
10 01435-40616 Bolt 2 15001-@
11 2A5-53-13540 Lamp Assembly, Room 1 28942-@
A2 20Y-53-12790 Lamp 1 15001-28941
08116-02410 Bulb, 10watt 1 15001-@
12 01023-70416 Screw 2 15001-@
13 08034-20414 Band, Black 1 15001-@

Reference:K0210-003008 Page:K005008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA021205

12

13
14

6 10
11
8
9 7
2
3
1

5 4

3
1 2

Reference:K0210-003008A Page:K005009

PC78US-8 S/N 15001-UP


Cab, Wiper and Room Lamp (#28942-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
1 2A5-53-12721 Motor Assembly 1 28942-
2 01245-00616 Screw 6 28942-
3 01643-70623 Washer 6 28942-
4 08034-20519 Band 1 28942-
22B-54-28710 Wiper Assembly 1 15001-
5 22B-54-28720 Arm, Wiper 1 15001-
6 20Y-54-39450 Wiper Blade 1 15001-
7 20Y-54-39460 Slider 1 15001-
8 20Y-54-39480 Plate 1 15001-
9 ND949007-2350 Screw and Washer 2 15001-
10 20Y-53-12233 Stopper 1 19352-
11 01435-40616 Bolt 2 15001-
12 2A5-53-13540 Lamp Assembly, Room 1 28942-
08116-02410 Bulb, 10watt 1 15001-
13 01023-70416 Screw 2 15001-
14 08034-20414 Band, Black 1 15001-

Reference:K0210-003008A Page:K005009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001401
12

5 12
5
6
7
6
5 8 7
12 4
11 8

11 12
1
20 21 2
5 3
4 5
19
12
13
15
14

17

16
18
4
5

10 5

Reference:K0210-003009 Page:K005010

PC78US-8 S/N 15001-UP


Cab, Radio Wiring Harness and Window Washer Hose and Working Lamp (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
1 20Y-06-41990 Antenna 1 15001-
2 01643-30623 Washer 1 15001-
3 01023-70416 Screw 2 15001-
4 22P-06-11331 Wiring Harness 1 15001-
5 08034-20414 Band, Black 15 15001-
6 20Y-06-42180 Speaker 2 15001-
7 20Y-53-13190 Cover 2 21053-
20Y-53-12221 Cover 2 15001-21052
8 01023-70416 Screw 8 15001-
9 01010-80812 Bolt 1 15001-
10 01643-30823 Washer 1 15001-
11 08037-01008 Grommet 2 15001-
12 22P-53-18930 Trim 5 15001-
13 20Y-54-39511 Nozzle 1 15001-
14 01370-40412 Screw 2 15001-
15 17M-911-2670 Hose 1 15001-
16 08017-C0701 Conduit 1 15001-
17 08034-20414 Band, Black 1 15001-
18 135-06-34260 Grommet 1 15001-
19 2A5-06-12430 Working Lamp Assembly 1 28942-
A2 22P-53-18710 Working Lamp Assembly 1 15001-28941
421-06-23330 Bulb, 70watt 1 15001-
20 01010-D1025 Bolt 1 28942-
01010-D1016 Bolt 1 15001-28941
21 01643-71032 Washer 1 15001-

Reference:K0210-003009 Page:K005010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000726

9 7

3
6 5

10
8

4
11

14
12 13

Reference:K0210-003010 Page:K005011

PC78US-8 S/N 15001-UP


Cab, Roof Cover, Hanger and Drink Holder (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
1 22P-53-15512 Cover 1 15001-
2 09416-10200 Rivet 11 15001-
3 22P-53-15531 Cover 1 15001-
4 208-53-13270 Rivet 2 15001-
5 09416-10200 Rivet 2 15001-
6 20Y-53-12710 Seal 1 15001-
7 22P-53-15541 Cover 1 15001-
8 20Y-53-12710 Seal 1 15001-
9 205-54-51250 Hanger 1 15001-
10 01225-70412 Screw 2 15001-
11 208-53-12991 Holder 1 15001-
12 22P-53-12981 Plate 1 15001-
13 426-925-3890 Plate 1 15001-
14 01023-70620 Screw 2 15001-

Reference:K0210-003010 Page:K005011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001405

3
1

6 4 7
5

11

10

9 8

11

Reference:K0210-003011 Page:K005012

PC78US-8 S/N 15001-UP


Cab, Air Intake and Grip (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
1 22P-53-17511 Cover 1 15001-
2 22P-53-17571 Bar 1 15001-
3 20Y-54-52791 Stopper 2 15001-
4 20B-54-12210 Spring 1 15001-
5 01023-70412 Screw 2 15001-
6 01435-40610 Bolt 4 15001-
7 20Y-53-11762 Lock Assembly 1 15001-
205-54-76280 Rotor Assembly 1 15001-
8 22P-53-18881 Grip 1 28942-
A2 22P-53-18880 Grip 1 15001-28941
9 01010-D1225 Bolt 2 15001-
10 01643-71232 Washer 2 15001-
11 22B-54-17290 Seal 2 15001-

Reference:K0210-003011 Page:K005012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000728
3

3
3

6
5
2
4

Reference:K0210-003012 Page:K005013

PC78US-8 S/N 15001-UP


Cab, Plug (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
1 22B-54-17282 Cap 1 15001-
2 09415-02512 Cap 1 15001-
3 20Y-53-11390 Cap 6 15001-
4 20Y-53-11380 Cap 6 15001-
5 01245-01016 Screw 1 15001-
6 01643-71032 Washer 1 15001-

Reference:K0210-003012 Page:K005013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000729
2

3 8
5 9
4
10

1 6

11
12
5 10

12

11

10
1

Reference:K0210-003013 Page:K005014

PC78US-8 S/N 15001-UP


Cab, KOMTRAX Antenna (#15001-21093)
Index Code Part Number Description Qty Serial No.
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
1 22P-53-18761 Antenna 1 15001-@
22B-54-28990 Sheet 3 15001-@
2 22P-53-18952 Cover 1 21094-@
A2 22P-53-18951 Cover 1 15001-21093
3 22B-54-28990 Sheet 1 15001-@
4 8A13-10-2100 Antenna 1 15001-@
5 8A13-10-2200 Cable 1 15001-@
6 22P-53-18791 Bracket 1 15001-@
7 01010-D1220 Bolt 1 15001-@
8 01643-71232 Washer 1 15001-@
9 08059-00413 Clip 1 15001-@
10 08034-20414 Band, Black 4 15001-@
11 08034-40521 Band 2 15001-@
12 22B-54-28990 Sheet 2 15001-@

Reference:K0210-003013 Page:K005014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014539
2

7
3
1
8
5 9
4
10

11
12
5 10

12

11

10
1

Reference:K0210-003013A Page:K005015

PC78US-8 S/N 15001-UP


Cab, KOMTRAX Antenna (#21094-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
1 22P-53-18761 Antenna 1 15001-
22B-54-28990 Sheet 3 15001-
2 22P-53-18952 Cover 1 21094-
3 22B-54-28990 Sheet 1 15001-
4 8A13-10-2100 Antenna 1 15001-
5 8A13-10-2200 Cable 1 15001-
6 22P-53-18791 Bracket 1 15001-
7 01010-D1220 Bolt 1 15001-
8 01643-71232 Washer 1 15001-
9 08059-00413 Clip 1 15001-
10 08034-20414 Band, Black 4 15001-
11 08034-40521 Band 2 15001-
12 22B-54-28990 Sheet 2 15001-

Reference:K0210-003013A Page:K005015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000730
3

Reference:K0210-003014 Page:K005016

PC78US-8 S/N 15001-UP


Cab, KOMATSU Mark (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00014 Cab Assembly 1 21094-
A2 22P-53-00013 Cab Assembly 1 16150-21093
22P-53-00012 Cab Assembly 1 15565-16149
22P-53-00011 Cab Assembly 1 15001-15564
1 22P-53-17911 Decal, Komatsu Logo 1 15001-
2 22B-54-17290 Seal 2 15001-
3 22B-54-21410 Sheet 1 15001-

Reference:K0210-003014 Page:K005016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000731

27
24 26
25

18
10 27
26
25 27
26
18 11 25
11 12
10 14 13
15
16 5
12
13
11

3
9 4
2
11 7
8
13 2 3
12 4
2
1
7
8
2

3
4
2 6
17
21
20 23
19

22

Reference:K0210-003015 Page:K005017

PC78US-8 S/N 15001-UP


Cab, Rear Cover and Rear Duct (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-53-15361 Cover 1 15001-
2 20Y-53-12310 Collar 5 15001-
3 01010-D0616 Bolt 3 15001-
4 01643-70623 Washer 3 15001-
5 22B-54-17380 Hammer 1 15001-
6 22P-53-18960 Plate 1 15001-
7 01245-00616 Screw 2 15001-
8 01643-70623 Washer 2 15001-
9 22P-53-15371 Cover Assembly 1 15001-
10 22B-54-25430 Seal 2 15001-
11 20Y-53-12310 Collar 5 15001-
12 01010-D0616 Bolt 4 15001-
13 01643-70623 Washer 4 15001-
14 01245-00616 Screw 1 15001-
15 01643-70623 Washer 1 15001-
16 22B-54-16461 Rivet 1 15001-
17 20Y-43-41491 Ashtray 1 15001-
18 22U-979-2381 Grille 2 15001-
19 425-926-3751 Holder 1 15001-
20 426-925-3890 Plate 1 15001-
21 22P-53-12981 Plate 1 15001-
22 01023-70616 Screw 2 15001-
23 20Y-43-41970 Sheet 1 15001-
24 22P-979-1321 Duct 1 15001-
25 01010-D0616 Bolt 3 15001-
26 01643-70623 Washer 3 15001-
27 20Y-53-12310 Collar 3 15001-

Reference:K0210-003015 Page:K005017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000732

9
8

7
8 8
6

Reference:K0210-003016 Page:K005018

PC78US-8 S/N 15001-UP


Cab, KOMTRAX Controller (#15001-)
Index Code Part Number Description Qty Serial No.
1 7826-23-3014 Controller 1 28942-
A2 7826-23-3013 Controller 1 26709-28941
A2 7826-23-3012 Controller 1 15893-26708
A2 7826-23-3011 Controller 1 15001-15892
2 01435-00610 Bolt 4 15001-
3 22P-06-11341 Bracket 1 15001-
4 01435-40616 Bolt 2 15001-
5 22P-979-1770 Controller, Air Conditioner 1 15001-
6 08211-01020 Clip 2 15001-
7 08211-01320 Clip 2 15001-
8 08211-01520 Clip 3 15001-
9 08211-01920 Clip 1 15001-

Reference:K0210-003016 Page:K005018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cab, R.H. and Rear Fixed Window Type, For EU Arrangement
FIG. Name FIG. No.
Cab, Cab Body and Window K0210-004001
Cab, Front Window K0210-004002
Cab, Front Lower Window K0210-004003
Cab, Roof Ventilator K0210-004004
Cab, Door K0210-004005
Cab, Door Lock K0210-004006
Cab, Door Open Lock K0210-004007
Cab, Wiper and Room Lamp (#15001-28941) K0210-004008
Cab, Wiper and Room Lamp (#28942-) K0210-004008A
Cab, Radio Wiring Harness and Window Washer Hose and Working Lamp K0210-004009
Cab, Roof Cover, Hanger and Drink Holder K0210-004010
Cab, Air Intake and Grip K0210-004011
Cab, Plug K0210-004012
Cab, KOMTRAX Antenna (#15001-21093) K0210-004013
Cab, KOMTRAX Antenna (#21094-) K0210-004013A
Cab, KOMATSU Mark K0210-004014
Cab, Rear Cover and Rear Duct K0210-004015
Cab, KOMTRAX Controller K0210-004016

Reference:X22-1090380 Page:K006000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000717
4

5 6

2
1

Reference:K0210-004001 Page:K006001

PC78US-8 S/N 15001-UP


Cab, Cab Body and Window (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
1 C1 Cab 1 16150-
C1 Cab 1 15565-16149
C1 Cab 1 15001-15564
2 22P-53-18341 Glass 1 15001-
3 22P-53-18460 Seal 1 15001-
4 22P-53-18331 Glass 1 15001-
5 22P-53-18450 Seal 1 15001-
6 22P-53-18270 Glass 1 15001-
7 22P-53-18470 Seal 1 15001-

Reference:K0210-004001 Page:K006001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA013759
35 41
36 42

44
34 43

28 42
30 40 37
29
44 39
43
45

32 38
33
31
34 17

36
20 35
19
18 21

9
8 11
12
13
6
10
14 12 5
15 11 7
3 13
2 15
13 16
1
25

13
27 22
26

4
23
24

Reference:K0210-004002 Page:K006002

PC78US-8 S/N 15001-UP


Cab, Front Window (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
22P-53-00390 Window Assembly 1 28942-
A2 22P-53-00081 Window Assembly 1 15001-28941
1 22P-53-28311 Frame 1 28942-
A2 22P-53-18312 Frame 1 15001-28941
2 22P-53-18320 Glass 1 15001-
3 22P-53-18380 Seal 1 15001-
4 22P-53-18371 Seal 1 15001-
5 22B-54-15411 Lock Assembly 1 15001-
6 22B-54-15440 Case 1 15001-
7 22B-54-15470 Knob 1 15001-
8 22B-54-15421 Lock Assembly 1 15001-
9 22B-54-15450 Case 1 15001-
10 22B-54-15480 Knob 1 15001-
11 01010-D0816 Bolt 4 15001-
12 208-53-11330 Washer 4 15001-
13 22B-54-28591 Roller 4 15001-
14 22B-54-15560 Stopper 1 15001-
15 01580-11008 Nut 2 15001-
16 20Y-54-65540 Cap 1 15001-
17 22P-53-28511 Plate 1 28942-
A2 22P-53-18511 Plate 1 15001-28941
18 01435-41020 Bolt 4 15001-
19 01240-00616 Screw 1 15001-
20 22P-53-18521 Bracket 1 15001-
21 01435-40616 Bolt 3 15001-
Reference:K0210-004002 Page:K006002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cab, Front Window (#15001-)
Index Code Part Number Description Qty Serial No.
22 22P-53-18531 Block 1 15001-
23 01252-80616 Bolt 2 15001-
24 01641-50608 Washer 2 15001-
25 20Y-54-52192 Block 1 15001-
26 01252-80616 Bolt 2 15001-
27 01641-50608 Washer 2 15001-
28 22B-54-15682 Block 1 15001-
29 01252-80625 Bolt, Hexagon Socket Head 2 15001-
30 01643-70623 Washer 2 15001-
31 22B-54-28440 Stopper 1 15001-
32 01252-80616 Bolt 2 15001-
33 01643-70623 Washer 2 15001-
34 20Y-54-51621 Striker 2 15001-
35 20T-54-74550 Nut 2 15001-
36 01643-71032 Washer 4 28942-
01643-71032 Washer 2 15001-28941
37 21J-06-12440 Switch, Limit 1 15001-
38 01583-11811 Nut 1 15001-
39 01640-21826 Washer, Flat 1 15001-
40 22P-53-28480 Bracket 1 28942-
A2 22P-53-18481 Bracket 1 15001-28941
41 22P-53-18491 Bracket 1 15001-
42 01435-40616 Bolt 4 15001-
43 20Y-54-11611 Stopper 2 15001-
44 01580-11008 Nut 2 15001-
45 22B-54-28350 Seal 1 15001-

Reference:K0210-004002 Page:K006002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000719
18

19

11 16
12
13 17

14
15

6
7
5

3
10
1
8
4 7
6
9

Reference:K0210-004003 Page:K006003

PC78US-8 S/N 15001-UP


Cab, Front Lower Window (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
22P-53-18401 Glass Assembly 1 28942-
A2 22P-53-18400 Glass Assembly 1 15001-28941
1 22P-53-18410 Glass 1 15001-
2 22P-53-28530 Retainer 2 28942-
A2 22B-54-15970 Retainer 2 15001-28941
3 22B-54-15980 Knob 2 15001-
4 08037-02512 Grommet 2 15001-
5 22B-54-28421 Trim 1 15893-
22B-54-28420 Trim 1 15001-15892
6 208-53-11830 Seat 2 15001-
7 01023-70620 Screw 4 15001-
8 208-53-11830 Seat 2 15001-
9 22B-54-15580 Plate 4 15001-
10 01023-70620 Screw 4 15001-
11 20Y-53-12611 Seat 1 15001-
12 20Y-54-52651 Spacer 2 15001-
13 01023-70616 Screw 2 15001-
14 22B-54-15841 Lock Assembly 1 15001-
15 01435-40616 Bolt 2 15001-
16 208-53-12110 Seat 2 15001-
17 01640-20610 Washer 2 15001-
18 01252-80625 Bolt, Hexagon Socket Head 2 15001-
19 01643-70623 Washer 2 15001-

Reference:K0210-004003 Page:K006003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000720
6

2
1

14
11
12
13

5 8

10
20
16 9
15

18 15 16
19
17

Reference:K0210-004004 Page:K006004

PC78US-8 S/N 15001-UP


Cab, Roof Ventilator (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
1 22P-53-18541 Roof 1 15565-
22B-54-28511 Roof 1 15001-15564
2 22P-53-17D20 Hinge, Welded 2 15565-
208-53-11M50 Hinge, Welded 2 15001-15564
3 01584-30806 Nut 4 15001-
4 22B-54-28521 Cover 1 15001-
5 09416-10200 Rivet 5 15001-
6 22B-54-28531 Plate 1 15001-
7 22B-54-28540 Seal 1 15001-
8 20Y-54-14590 Handle 1 15001-
9 01245-00616 Screw 2 15001-
10 01643-70623 Washer 2 15001-
11 2A5-53-12970 Lock Assembly 1 21560-
A2 20Y-53-11721 Lock Assembly 1 15001-21559
12 20Y-53-11781 Knob 1 15001-
13 01435-40610 Bolt 3 15001-
14 20Y-53-11931 Cover 1 15001-
15 20Y-54-36342 Spring, Gas 2 15001-
16 04052-10833 Pin, Snap 4 15001-
17 20Y-53-11771 Striker 1 15001-
18 01245-00820 Screw 2 15001-
19 01643-70823 Washer 2 15001-
20 22B-54-28550 Seal 1 15001-

Reference:K0210-004004 Page:K006004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA013766

24
33
32
30
26 31

34
25

8
9 1
11
6 12
19 13
17 18 7 10
5

4
22
21
23
37
36

20
17 18
35
15
16 32
14
27
3
28 30
31 2
29
33

Reference:K0210-004005 Page:K006005

PC78US-8 S/N 15001-UP


Cab, Door (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
22P-53-00032 Door Assembly 1 28942-
A2 22P-53-00031 Door Assembly 1 15001-28941
1 C1 Door 1 15001-
2 22M-54-24260 Glass 1 15001-
3 22M-54-25470 Seal 1 15001-
4 22P-53-17272 Glass 1 15001-
5 22M-54-25460 Seal 1 15001-
6 22P-53-28520 Roller Assembly 1 28942-
A2 22P-53-17432 Roller Assembly 1 15893-28941
A2 22P-53-17431 Roller Assembly 1 15001-15892
7 20U-54-44920 Shim, T=1.2mm 1 15001-
8 01010-D0830 Bolt 2 15001-
9 01643-70823 Washer 2 15001-
10 22P-53-17420 Roller Assembly 1 15893-
A2 22M-54-27990 Roller Assembly 1 15001-15892
11 01010-D0816 Bolt 2 15001-
12 01641-50812 Washer, Flat 2 15001-
13 01643-70823 Washer 2 15001-
14 22P-53-17452 Roller Assembly 1 15001-
15 01010-D0816 Bolt 3 15001-
16 01643-70823 Washer 3 15001-
17 20U-54-25321 Striker 2 15001-
18 20U-54-25341 Shim, T=1.0mm 2 15001-
19 01435-00612 Bolt 2 15001-
20 01435-00612 Bolt 2 15001-
Reference:K0210-004005 Page:K006005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cab, Door (#15001-)
Index Code Part Number Description Qty Serial No.
21 22P-53-28560 Cover 1 28942-
A2 22M-54-24430 Cover 1 15001-28941
22 01023-20610 Screw 6 15001-
23 22P-53-17280 Packing 1 15001-
24 22P-53-17611 Bracket 1 15001-
25 01010-D1220 Bolt 2 15001-
26 01643-71232 Washer 2 15001-
27 22P-53-17621 Bracket 1 15001-
28 01010-D1230 Bolt 2 15001-
29 01643-71232 Washer 2 15001-
30 20U-54-25321 Striker 2 15001-
31 20U-54-25341 Shim, T=1.0mm 2 15001-
32 01435-00616 Bolt 4 15001-
33 01584-30605 Nut 4 15001-
34 22P-53-17461 Weather Strip 1 15001-
35 22M-54-14470 Handle 1 15001-
36 22P-53-17260 Grip 1 15001-
37 01252-80512 Bolt, Hexagon Socket Head 2 15001-

Reference:K0210-004005 Page:K006005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000722

28

29

9
22 26

26
5
3 8
25
27 7 6
4
15 13 10
16
19 27 21 24
17
11
26
26
26 27
20 14
27 26 24 23
18 2
12
25
1

Reference:K0210-004006 Page:K006006

PC78US-8 S/N 15001-UP


Cab, Door Lock (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
22P-53-00032 Door Assembly 1 28942-
A2 22P-53-00031 Door Assembly 1 15001-28941
1 20Y-54-14520 Lock Assembly 1 15001-
2 01435-00612 Bolt 2 15001-
3 20Y-54-14520 Lock Assembly 1 15001-
4 01435-00612 Bolt 2 15001-
5 22P-53-17231 Cover 1 15001-
6 01435-40610 Bolt 2 15001-
7 22P-53-17220 Lever Assembly 1 15001-
8 01435-00612 Bolt 3 15001-
9 22P-53-17241 Knob 1 15001-
10 22B-54-16211 Handle 1 15001-
11 22B-54-16330 Snap 1 15001-
12 01435-00610 Bolt 2 15001-
13 20Y-54-35890 Lock Assembly 1 15001-
14 22P-53-17311 Link Assembly 1 15001-
15 01435-00612 Bolt 3 15001-
16 22P-53-17551 Link Assembly 1 15001-
17 01435-00610 Bolt 2 15001-
18 22P-53-17590 Rod 1 15001-
19 22P-53-17580 Rod 1 15001-
20 22P-53-17541 Rod 1 15001-
21 22M-54-24351 Rod 1 15001-
22 22P-53-17361 Rod 1 15001-
23 22M-54-24370 Rod 1 15001-
Reference:K0210-004006 Page:K006006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cab, Door Lock (#15001-)
Index Code Part Number Description Qty Serial No.
24 205-54-71830 Snap 3 15001-
25 205-54-71840 Snap 2 15001-
26 22P-53-17560 Clip 6 15001-
27 22P-53-17520 Shim, T=0.80mm 5 15001-
28 22P-53-17471 Seal 1 15001-
29 22U-43-23290 Clip 2 15001-

Reference:K0210-004006 Page:K006006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA018083

26
20
19

25
23 22
21 22
15
14
4 4 11 18
10
10
7 26
13
12
14
11
8 3
2 5 9
5 1
6
4
10
16
25 24

4
10

17

Reference:K0210-004007 Page:K006007

PC78US-8 S/N 15001-UP


Cab, Door Open Lock (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
1 22P-53-17411 Rail 1 15001-
2 205-54-71731 Striker 1 15001-
3 20Y-54-35470 Striker 1 15001-
4 22B-54-16691 Striker 4 28942-
A2 22B-54-16690 Striker 4 15001-28941
5 20U-54-25190 Washer 4 15001-
6 01240-01025 Screw 2 15001-
7 20U-54-24661 Plate 1 15001-
8 20Y-54-35480 Shim, T=1.6mm 1 15001-
9 01240-01025 Screw 2 15001-
10 01435-40612 Bolt 8 15001-
11 22M-54-16550 Packing 4 15001-
12 01240-00820 Screw, Hexagon Socket Head 1 15001-
13 01643-70823 Washer 3 15001-
14 208-53-11330 Washer 4 15001-
15 01546-10812 Nut 3 15001-
16 01584-30806 Nut 1 15001-
17 22P-53-17150 Trim 1 15001-
18 22P-53-17441 Stopper 1 15001-
19 01010-D1225 Bolt 3 15001-
20 01643-71232 Washer 3 15001-
21 22M-54-24860 Stopper, L=45mm 2 15001-
22 20U-54-25231 Nut 4 15001-
23 22B-54-16680 Stopper 1 15001-
24 20Y-54-11611 Stopper 1 15001-
Reference:K0210-004007 Page:K006007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cab, Door Open Lock (#15001-)
Index Code Part Number Description Qty Serial No.
25 01580-11008 Nut 2 15001-
26 22B-54-17290 Seal 2 28942-

Reference:K0210-004007 Page:K006007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000724

11

12
13

5 9
10
7
6
8
2
1

4 3

Reference:K0210-004008 Page:K006008

PC78US-8 S/N 15001-UP


Cab, Wiper and Room Lamp (#15001-28941)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-@
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
1 22B-54-28731 Wiper Motor Assembly 1 15001-28941
2 01435-00616 Bolt 6 15001-28941
3 08034-20414 Band, Black 1 15001-28941
22B-54-28710 Wiper Assembly 1 15001-@
4 22B-54-28720 Arm, Wiper 1 15001-@
5 20Y-54-39450 Wiper Blade 1 15001-@
6 20Y-54-39460 Slider 1 15001-@
7 20Y-54-39480 Plate 1 15001-@
8 ND949007-2350 Screw and Washer 2 15001-@
9 20Y-53-12233 Stopper 1 19352-@
A2 20Y-53-12232 Stopper 1 15001-19351
10 01435-40616 Bolt 2 15001-@
11 2A5-53-13540 Lamp Assembly, Room 1 28942-@
A2 20Y-53-12790 Lamp 1 15001-28941
08116-02410 Bulb, 10watt 1 15001-@
12 01023-70416 Screw 2 15001-@
13 08034-20414 Band, Black 1 15001-@

Reference:K0210-004008 Page:K006008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA021205

12

13
14

6 10
11
8
9 7
2
3
1

5 4

3
1 2

Reference:K0210-004008A Page:K006009

PC78US-8 S/N 15001-UP


Cab, Wiper and Room Lamp (#28942-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
1 2A5-53-12721 Motor Assembly 1 28942-
2 01245-00616 Screw 6 28942-
3 01643-70623 Washer 6 28942-
4 08034-20519 Band 1 28942-
22B-54-28710 Wiper Assembly 1 15001-
5 22B-54-28720 Arm, Wiper 1 15001-
6 20Y-54-39450 Wiper Blade 1 15001-
7 20Y-54-39460 Slider 1 15001-
8 20Y-54-39480 Plate 1 15001-
9 ND949007-2350 Screw and Washer 2 15001-
10 20Y-53-12233 Stopper 1 19352-
11 01435-40616 Bolt 2 15001-
12 2A5-53-13540 Lamp Assembly, Room 1 28942-
08116-02410 Bulb, 10watt 1 15001-
13 01023-70416 Screw 2 15001-
14 08034-20414 Band, Black 1 15001-

Reference:K0210-004008A Page:K006009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001495
12

5 12
5
6
7
6
5 8 7
12 4
11 8

11 12
1
24 25 2
5 3
4 5
23 16 15
12
17
19
18

5
21 14
13

20
5 4
22

10 5

Reference:K0210-004009 Page:K006010

PC78US-8 S/N 15001-UP


Cab, Radio Wiring Harness and Window Washer Hose and Working Lamp (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
1 20Y-06-41990 Antenna 1 15001-
2 01643-30623 Washer 1 15001-
3 01023-70416 Screw 2 15001-
4 22P-06-11662 Wiring Harness 1 18252-
22P-06-11661 Wiring Harness 1 15001-18251
5 08034-20414 Band, Black 18 15001-
6 20Y-06-42180 Speaker 2 15001-
7 20Y-53-13190 Cover 2 21053-
20Y-53-12221 Cover 2 15001-21052
8 01023-70416 Screw 8 15001-
9 01010-80812 Bolt 1 15001-
10 01643-30823 Washer 1 15001-
11 08037-01008 Grommet 2 15001-
12 22P-53-18930 Trim 5 15001-
13 227-54-18611 Bracket 1 18252-
227-54-18610 Bracket 1 15001-18251
14 01435-00612 Bolt 4 15001-
15 08912-51600 Cord 1 15001-
16 20Y-53-18320 Cover 1 15001-
17 20Y-54-39511 Nozzle 1 15001-
18 01370-40412 Screw 2 15001-
19 17M-911-2670 Hose 1 15001-
20 08017-C0701 Conduit 1 15001-
21 08034-20414 Band, Black 1 15001-
22 135-06-34260 Grommet 1 15001-
Reference:K0210-004009 Page:K006010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cab, Radio Wiring Harness and Window Washer Hose and Working Lamp (#15001-)
Index Code Part Number Description Qty Serial No.
23 2A5-06-12430 Working Lamp Assembly 1 28942-
A2 22P-53-18710 Working Lamp Assembly 1 15001-28941
421-06-23330 Bulb, 70watt 1 15001-
24 01010-D1025 Bolt 1 28942-
01010-D1016 Bolt 1 15001-28941
25 01643-71032 Washer 1 15001-

Reference:K0210-004009 Page:K006010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000726

9 7

3
6 5

10
8

4
11

14
12 13

Reference:K0210-004010 Page:K006011

PC78US-8 S/N 15001-UP


Cab, Roof Cover, Hanger and Drink Holder (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
1 22P-53-15512 Cover 1 15001-
2 09416-10200 Rivet 11 15001-
3 22P-53-15531 Cover 1 15001-
4 208-53-13270 Rivet 2 15001-
5 09416-10200 Rivet 2 15001-
6 20Y-53-12710 Seal 1 15001-
7 22P-53-15541 Cover 1 15001-
8 20Y-53-12710 Seal 1 15001-
9 205-54-51250 Hanger 1 15001-
10 01225-70412 Screw 2 15001-
11 208-53-12991 Holder 1 15001-
12 22P-53-12981 Plate 1 15001-
13 426-925-3890 Plate 1 15001-
14 01023-70620 Screw 2 15001-

Reference:K0210-004010 Page:K006011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001405

3
1

6 4 7
5

11

10

9 8

11

Reference:K0210-004011 Page:K006012

PC78US-8 S/N 15001-UP


Cab, Air Intake and Grip (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
1 22P-53-17511 Cover 1 15001-
2 22P-53-17571 Bar 1 15001-
3 20Y-54-52791 Stopper 2 15001-
4 20B-54-12210 Spring 1 15001-
5 01023-70412 Screw 2 15001-
6 01435-40610 Bolt 4 15001-
7 20Y-53-11762 Lock Assembly 1 15001-
205-54-76280 Rotor Assembly 1 15001-
8 22P-53-18881 Grip 1 28942-
A2 22P-53-18880 Grip 1 15001-28941
9 01010-D1225 Bolt 2 15001-
10 01643-71232 Washer 2 15001-
11 22B-54-17290 Seal 2 15001-

Reference:K0210-004011 Page:K006012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001512
3
3
3

6
5
2
8
7

Reference:K0210-004012 Page:K006013

PC78US-8 S/N 15001-UP


Cab, Plug (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
1 22B-54-17282 Cap 1 15001-
2 09415-02512 Cap 1 15001-
3 20Y-53-11390 Cap 6 15001-
4 20Y-53-11380 Cap 6 15001-
5 01245-01016 Screw 1 15001-
6 01643-71032 Washer 1 15001-
7 01010-D0610 Bolt 4 15001-
8 01643-70623 Washer 4 15001-

Reference:K0210-004012 Page:K006013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000729
2

3 8
5 9
4
10

1 6

11
12
5 10

12

11

10
1

Reference:K0210-004013 Page:K006014

PC78US-8 S/N 15001-UP


Cab, KOMTRAX Antenna (#15001-21093)
Index Code Part Number Description Qty Serial No.
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
1 22P-53-18761 Antenna 1 15001-@
22B-54-28990 Sheet 3 15001-@
2 22P-53-18952 Cover 1 21094-@
A2 22P-53-18951 Cover 1 15001-21093
3 22B-54-28990 Sheet 1 15001-@
4 8A13-10-2100 Antenna 1 15001-@
5 8A13-10-2200 Cable 1 15001-@
6 22P-53-18791 Bracket 1 15001-@
7 01010-D1220 Bolt 1 15001-@
8 01643-71232 Washer 1 15001-@
9 08059-00413 Clip 1 15001-@
10 08034-20414 Band, Black 4 15001-@
11 08034-40521 Band 2 15001-@
12 22B-54-28990 Sheet 2 15001-@

Reference:K0210-004013 Page:K006014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014539
2

7
3
1
8
5 9
4
10

11
12
5 10

12

11

10
1

Reference:K0210-004013A Page:K006015

PC78US-8 S/N 15001-UP


Cab, KOMTRAX Antenna (#21094-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
1 22P-53-18761 Antenna 1 15001-
22B-54-28990 Sheet 3 15001-
2 22P-53-18952 Cover 1 21094-
3 22B-54-28990 Sheet 1 15001-
4 8A13-10-2100 Antenna 1 15001-
5 8A13-10-2200 Cable 1 15001-
6 22P-53-18791 Bracket 1 15001-
7 01010-D1220 Bolt 1 15001-
8 01643-71232 Washer 1 15001-
9 08059-00413 Clip 1 15001-
10 08034-20414 Band, Black 4 15001-
11 08034-40521 Band 2 15001-
12 22B-54-28990 Sheet 2 15001-

Reference:K0210-004013A Page:K006015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000730
3

Reference:K0210-004014 Page:K006016

PC78US-8 S/N 15001-UP


Cab, KOMATSU Mark (#15001-)
Index Code Part Number Description Qty Serial No.
22P-53-00064 Cab Assembly 1 21094-
A2 22P-53-00063 Cab Assembly 1 18252-21093
22P-53-00062 Cab Assembly 1 16150-18251
22P-53-00061 Cab Assembly 1 15565-16149
22P-53-00060 Cab Assembly 1 15001-15564
1 22P-53-17911 Decal, Komatsu Logo 1 15001-
2 22B-54-17290 Seal 2 15001-
3 22B-54-21410 Sheet 1 15001-

Reference:K0210-004014 Page:K006016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001616

26
23 25
24

17
9 26
25
24 26
25
17 10 24
10 12
9 13 11
14
15 5
11
12
10

3
8 4
2
10 6
7
12 2 3
11 4
2
1
6
7
2

3
4
2
16
20 22
19
18

21

Reference:K0210-004015 Page:K006017

PC78US-8 S/N 15001-UP


Cab, Rear Cover and Rear Duct (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-53-15361 Cover 1 15001-
2 20Y-53-12310 Collar 5 15001-
3 01010-D0616 Bolt 3 15001-
4 01643-70623 Washer 3 15001-
5 22B-54-17380 Hammer 1 15001-
6 01245-00616 Screw 2 15001-
7 01643-70623 Washer 2 15001-
8 22P-53-15371 Cover Assembly 1 15001-
9 22B-54-25430 Seal 2 15001-
10 20Y-53-12310 Collar 5 15001-
11 01010-D0616 Bolt 4 15001-
12 01643-70623 Washer 4 15001-
13 01245-00616 Screw 1 15001-
14 01643-70623 Washer 1 15001-
15 22B-54-16461 Rivet 1 15001-
16 20Y-43-41491 Ashtray 1 15001-
17 22U-979-2381 Grille 2 15001-
18 425-926-3751 Holder 1 15001-
19 426-925-3890 Plate 1 15001-
20 22P-53-12981 Plate 1 15001-
21 01023-70616 Screw 2 15001-
22 20Y-43-41970 Sheet 1 15001-
23 22P-979-1321 Duct 1 15001-
24 01010-D0616 Bolt 3 15001-
25 01643-70623 Washer 3 15001-
26 20Y-53-12310 Collar 3 15001-

Reference:K0210-004015 Page:K006017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000732

9
8

7
8 8
6

Reference:K0210-004016 Page:K006018

PC78US-8 S/N 15001-UP


Cab, KOMTRAX Controller (#15001-)
Index Code Part Number Description Qty Serial No.
1 7826-23-3014 Controller 1 28942-
A2 7826-23-3013 Controller 1 26709-28941
A2 7826-23-3012 Controller 1 15893-26708
A2 7826-23-3011 Controller 1 15001-15892
2 01435-00610 Bolt 4 15001-
3 22P-06-11341 Bracket 1 15001-
4 01435-40616 Bolt 2 15001-
5 22P-979-1770 Controller, Air Conditioner 1 15001-
6 08211-01020 Clip 2 15001-
7 08211-01320 Clip 2 15001-
8 08211-01520 Clip 3 15001-
9 08211-01920 Clip 1 15001-

Reference:K0210-004016 Page:K006018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Head Guard
FIG. Name FIG. No.
Head Guard K0220-001001

Reference:X22-1031961 Page:K007000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000738
6
7

1 2
8
9 3
5 4
2
3
4

10

11

Reference:K0220-001001 Page:K007001

PC78US-8 S/N 15001-UP


Head Guard (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-954-1112 Guard 1 15001-
2 01010-81275 Bolt 4 15001-
3 01643-31232 Washer 4 15001-
4 130-43-64260 Collar 4 15001-
5 195-Z11-2970 Cap 4 15001-
6 20Y-954-6250 Plate 1 15001-
7 01023-20612 Screw 2 15001-
8 01010-D1220 Bolt 4 15001-
9 01643-71232 Washer 4 15001-
10 20U-54-46520 Hook, Sticker Type 1 15001-
11 08034-40521 Band 1 15001-

Reference:K0220-001001 Page:K007001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Front Guard, EC Regulation LV1
FIG. Name FIG. No.
Front Guard K0230-002001

Reference:X22-1031991 Page:K008000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000715

19
20
19
20

18

13
15
14
19 19
20 20
26 12
17
16
18 27

3
21 25
24
23 9
22

5
4

11 2
10

5 8
4 7

Reference:K0230-002001 Page:K008001

PC78US-8 S/N 15001-UP


Front Guard (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-954-1221 Guard, Upper, Lower 1 15001-
2 22P-954-1240 Bracket 1 15001-
3 22P-954-1261 Bracket 1 15001-
4 01010-D1280 Bolt 2 15001-
5 01643-71232 Washer 2 15001-
6 22B-954-2270 Spacer 2 15001-
7 01011-D1230 Bolt 2 15001-
8 01643-71232 Washer 2 15001-
9 22P-954-1210 Guard, Upper 1 15001-
10 01010-D1280 Bolt 2 15001-
11 01643-71232 Washer 2 15001-
12 22P-954-1230 Bracket 1 15001-
13 22P-954-1250 Bracket 1 15001-
14 01010-D1220 Bolt 1 15001-
15 01643-71232 Washer 1 15001-
16 01010-D1255 Bolt 1 15001-
17 01643-71232 Washer 1 15001-
18 14X-911-1330 Hinge 2 15001-
19 01010-D1025 Bolt 12 15001-
20 01643-71032 Washer 12 15001-
21 20Y-54-36342 Spring, Gas 1 15001-
22 22P-954-1270 Plate 1 15001-
23 22B-954-1660 Plate 1 15001-
24 01010-D0820 Bolt 2 15001-
25 01643-70823 Washer 2 15001-
26 04052-10833 Pin, Snap 2 15001-
27 01643-70823 Washer 2 15001-

Reference:K0230-002001 Page:K008001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Front Guard, EC Regulation LV2
FIG. Name FIG. No.
Front Guard K0230-001001

Reference:X22-1031981 Page:K009000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000714

2
4
3

2
4
3

Reference:K0230-001001 Page:K009001

PC78US-8 S/N 15001-UP


Front Guard (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-954-1121 Guard 1 15001-
2 130-43-64260 Collar 6 15001-
3 01010-D1225 Bolt 6 15001-
4 01643-71232 Washer 6 15001-

Reference:K0230-001001 Page:K009001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Front Guard, Half
FIG. Name FIG. No.
Front Guard K0230-003001

Reference:X22-1032000 Page:K010000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000716

6
5

1 2

4
3

Reference:K0230-003001 Page:K010001

PC78US-8 S/N 15001-UP


Front Guard (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-954-1221 Guard 1 15001-
2 22B-954-2270 Spacer 4 15001-
3 01011-D1230 Bolt 2 15001-
4 01643-71232 Washer 2 15001-
5 01010-D1280 Bolt 2 15001-
6 01643-71232 Washer 2 15001-

Reference:K0230-003001 Page:K010001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Mat, For Machine With 1-Additional Actuator Piping
FIG. Name FIG. No.
Floor Mat K0310-001001

Reference:X22-1031911 Page:K011000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000712

3
2

Reference:K0310-001001 Page:K011001

PC78US-8 S/N 15001-UP


Floor Mat (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-53-13733 Floor Mat 1 15797-
A2 22P-53-13732 Floor Mat 1 15001-15796
2 01435-40616 Bolt 2 15001-
3 20Y-43-41290 Collar 2 15001-

Reference:K0310-001001 Page:K011001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Mat, Without 1-Additional Actuator Piping
FIG. Name FIG. No.
Floor Mat K0310-002001

Reference:X22-1035381 Page:K012000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000712

3
2

Reference:K0310-002001 Page:K012001

PC78US-8 S/N 15001-UP


Floor Mat (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-53-13724 Floor Mat 1 15797-
A2 22P-53-13723 Floor Mat 1 15001-15796
2 01435-40616 Bolt 2 15001-
3 20Y-43-41290 Collar 2 15001-

Reference:K0310-002001 Page:K012001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Sunvisor
FIG. Name FIG. No.
Sunvisor K0330-001001

Reference:X22-0930430 Page:K013000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000734

21
13
11

13

10
8
14
9 21

4 10
1
3
23
5 22 14
1
4 10
23
3 20 22
1
19
18
17
2 7 16
15
6
12

Reference:K0330-001001 Page:K013001

PC78US-8 S/N 15001-UP


Sunvisor (#15001-)
Index Code Part Number Description Qty Serial No.
1 22B-54-26731 Sunvisor, Front 1 15001-
2 01023-20616 Screw 4 15001-
3 01580-00806 Nut 4 15001-
4 01641-50812 Washer, Flat 2 15001-
5 22B-54-26740 Seal 1 15001-
6 01252-80616 Bolt 4 15001-
7 01643-70623 Washer 4 15001-
8 01580-10605 Nut 4 15001-
9 01640-20610 Washer 4 15001-
10 22B-54-26751 Sunvisor, Roof 1 15001-
11 01023-20620 Screw 4 15001-
12 01245-00820 Screw 1 15001-
13 01580-00806 Nut 4 15001-
14 01641-50812 Washer, Flat 2 15001-
15 01643-70823 Washer 1 15001-
16 01643-71032 Washer 1 15001-
17 20Y-53-17420 Plate 1 15001-
18 20Y-54-52960 Lever 1 15001-
19 20Y-54-52970 Spring 1 15001-
20 20Y-54-52980 Boss 1 15001-
21 20Y-54-52651 Spacer 4 15001-
22 01010-D0620 Bolt 4 15001-
23 01643-70623 Washer 4 15001-

Reference:K0330-001001 Page:K013001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Window Washer Tank, Without Ceiling Window Wiper
FIG. Name FIG. No.
Window Washer Tank K0350-001001

Reference:X22-1035931 Page:K014000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001521

6
5
9

6 6

8 6

10

3
4

Reference:K0350-001001 Page:K014001

PC78US-8 S/N 15001-UP


Window Washer Tank (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-06-42130 Tank Assembly 1 15001-
2 21W-06-42140 Cap 1 15001-
3 01010-80616 Bolt 2 15001-
4 01643-30623 Washer 2 15001-
5 21W-06-51130 Hose 1 15001-
6 08034-40521 Band 4 15001-
7 195-979-8590 Valve 1 15001-
8 08211-00720 Clip 2 15001-
9 08057-12012 Clip 2 15001-
10 (21W-06-51114) Wiring Harness
(21W-06-51114) Wiring Harness
(21W-06-51114) Wiring Harness
(21W-06-51114) Wiring Harness
(21W-06-51114) Wiring Harness
(21W-06-51114) Wiring Harness

Reference:K0350-001001 Page:K014001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Air Conditioner Unit
FIG. Name FIG. No.
Air Conditioner Unit, Air Conditioner Duct K0700-001001
Air Conditioner Unit, Inner Parts, Air Compressor K0700-001002
Air Conditioner Unit, Compressor Mounting K0700-001003
Air Conditioner Unit, Air Conditioner Piping Mounting (1/2) K0700-001004
Air Conditioner Unit, Air Conditioner Piping Mounting (2/2) (#15001-20789) K0700-001005
Air Conditioner Unit, Air Conditioner Piping Mounting (2/2) (#20790-) K0700-001005A
Air Conditioner Unit, Sensor and Receiver K0700-001006

Reference:X22-1036301 Page:K015000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000787
2
3 7
6

3 4
5

Reference:K0700-001001 Page:K015001

PC78US-8 S/N 15001-UP


Air Conditioner Unit, Air Conditioner Duct (#15001-)
Index Code Part Number Description Qty Serial No.
1 22B-979-2711 Duct 1 15001-
2 22B-979-2721 Duct 1 15001-
3 20Y-54-13870 Rivet 2 15001-
4 22P-979-1731 Duct 1 15001-
5 17M-911-3530 Element 1 15001-
6 208-53-12680 Clip 1 15001-
7 22P-979-1741 Duct, Rear 1 15001-

Reference:K0700-001001 Page:K015001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
@@1D039@

13

14

11 1
10
9

2
5
8

4
12
6

Reference:K0700-001002 Page:K015002

PC78US-8 S/N 15001-UP


Air Conditioner Unit, Inner Parts, Air Compressor (#15001-)
Index Code Part Number Description Qty Serial No.
20Y-810-1260 Compressor Assembly 1 15001-
1 ND447220-4051 Compressor Assembly 1 15001-
ND247300-0510 Clutch Assembly, Magnetic 1 15001-
2 ND047310-7240 Stator 1 15001-
3 C1 Rotor 1 15001-
4 ND047410-1570 Hub 1 15001-
ND047410-1580 Hub 1 15001-
5 ND949047-2950 Bolt and Washer 6 15001-
6 ND047372-0660 Dust Cover 1 15001-
7 ND949070-1360 Ring, Snap 1 15001-
ND949070-0640 Ring, Snap 1 15001-
8 ND949070-1390 Ring Assembly 1 15001-
9 ND949013-7480 Washer, T=0.1mm 1 15001-
10 ND949013-7500 Washer, T=0.3mm 1 15001-
11 ND949013-7510 Washer, T=0.5mm 1 15001-
12 ND949048-0430 Bolt 1 15001-
13 ND91310-05081 Screw 1 15001-
14 ND146691-4470 Clamp 1 15001-

Reference:K0700-001002 Page:K015002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA011623
12
13

6
7

3
5
11
9 16
10 15
14

4
8 2

17 19
19 18
18

Reference:K0700-001003 Page:K015003

PC78US-8 S/N 15001-UP


Air Conditioner Unit, Compressor Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-979-1261 Bracket 1 15001-
2 01010-81440 Bolt 1 15001-
3 01010-81490 Bolt 1 15001-
4 01643-11445 Washer, Flat 1 15001-
5 01643-11445 Washer, Flat 1 15001-
6 01010-80875 Bolt 4 15001-
7 01643-30823 Washer 4 15001-
8 22P-979-1271 Cover 1 15001-
9 01010-80816 Bolt 2 15001-
10 01643-30823 Washer 2 15001-
11 600-051-2050 Clip 1 15001-
12 01010-80816 Bolt 1 15001-
13 01643-30823 Washer 1 15001-
14 22P-979-1311 Condenser Assembly 1 15001-
15 01010-80835 Bolt 4 15001-
16 01643-30823 Washer 4 15001-
17 22P-979-1251 Bracket 1 15001-
18 01010-80820 Bolt 2 15001-
19 01643-30823 Washer 2 15001-

Reference:K0700-001003 Page:K015003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001532
1
21
5
6 22

9
10 15
8 2
23 12 11
7

16
19
20

18 17
4
3
2

12
14
13

Reference:K0700-001004 Page:K015004

PC78US-8 S/N 15001-UP


Air Conditioner Unit, Air Conditioner Piping Mounting (1/2) (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-979-1121 Hose 1 15001-
2 20Y-979-3140 O-ring 2 15001-
3 01010-80630 Bolt 1 15001-
4 01643-30623 Washer 1 15001-
5 01010-80630 Bolt 1 15001-
6 01643-30623 Washer 1 15001-
7 04434-53212 Clip 1 15001-
8 07095-20523 Cushion 1 15001-
9 01010-81225 Bolt 1 15001-
10 01643-31232 Washer 1 15001-
11 22P-979-1131 Hose 1 15001-
12 20Y-979-3150 O-ring 2 15001-
13 01010-80630 Bolt 1 15001-
14 01643-30623 Washer 1 15001-
15 01435-00625 Bolt 1 15001-
16 600-051-2200 Clip 1 15001-
17 01010-81020 Bolt 1 15001-
18 01643-31032 Washer 1 15001-
19 04434-53411 Clip 1 15001-
20 07095-20627 Cushion 1 15001-
21 01010-81035 Bolt 1 15001-
22 01643-31032 Washer 1 15001-
23 04434-51910 Clip 1 15001-

Reference:K0700-001004 Page:K015004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001533
12
13 8
10 9
11 5
6 4
7

2
3
5 27 28
1
29

15 26
16
23 19
24 14 26
20

22 21
14
31
30
32
18
17
25

Reference:K0700-001005 Page:K015005

PC78US-8 S/N 15001-UP


Air Conditioner Unit, Air Conditioner Piping Mounting (2/2) (#15001-20789)
Index Code Part Number Description Qty Serial No.
1 11Y-09-11160 Clip 1 15001-@
2 11Y-09-11160 Clip 1 15001-@
3 04434-53411 Clip 1 15001-@
4 04434-53411 Clip 1 15001-@
5 07095-20627 Cushion 2 15001-@
6 01010-81030 Bolt 1 15001-@
7 01643-31032 Washer 1 15001-@
8 01010-81030 Bolt 1 15001-@
9 01643-31032 Washer 1 15001-@
10 04434-53412 Clip 1 15001-@
11 07095-20627 Cushion 1 15001-@
12 01010-81225 Bolt 1 15001-@
13 01643-31232 Washer 1 15001-@
14 21K-03-11190 Clip 2 15001-@
15 01010-81030 Bolt 1 15001-@
16 01643-31032 Washer 1 15001-@
17 01010-81225 Bolt 1 15001-@
18 01643-31232 Washer 1 15001-@
19 22P-979-1880 Bracket 1 15001-@
20 01010-81225 Bolt 2 15001-@
21 01643-31232 Washer 2 15001-@
22 21T-38-71260 Bracket 1 15001-@
23 01010-81225 Bolt 1 15001-@
24 01643-31232 Washer 1 15001-@
25 21W-979-5150 Grommet 1 15001-@
26 08034-20536 Band 2 15001-20789
27 22P-979-1890 Bracket 1 15001-@
28 01010-81025 Bolt 1 15001-@
29 01643-31032 Washer 1 15001-@
30 22P-979-1290 Plate 1 15001-@
Reference:K0700-001005 Page:K015005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Air Conditioner Unit, Air Conditioner Piping Mounting (2/2) (#15001-20789)
Index Code Part Number Description Qty Serial No.
31 01010-81225 Bolt 2 15001-@
32 01643-31232 Washer 2 15001-@

Reference:K0700-001005 Page:K015005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014578
12
13 8
10 9
11 5
6 4
7

2
3
5 27 28
1
29

15 26
16
23 19
24 14 26
20

22 21
14
31
30
32
18
17
25
26

Reference:K0700-001005A Page:K015006

PC78US-8 S/N 15001-UP


Air Conditioner Unit, Air Conditioner Piping Mounting (2/2) (#20790-)
Index Code Part Number Description Qty Serial No.
1 11Y-09-11160 Clip 1 15001-
2 11Y-09-11160 Clip 1 15001-
3 04434-53411 Clip 1 15001-
4 04434-53411 Clip 1 15001-
5 07095-20627 Cushion 2 15001-
6 01010-81030 Bolt 1 15001-
7 01643-31032 Washer 1 15001-
8 01010-81030 Bolt 1 15001-
9 01643-31032 Washer 1 15001-
10 04434-53412 Clip 1 15001-
11 07095-20627 Cushion 1 15001-
12 01010-81225 Bolt 1 15001-
13 01643-31232 Washer 1 15001-
14 21K-03-11190 Clip 2 15001-
15 01010-81030 Bolt 1 15001-
16 01643-31032 Washer 1 15001-
17 01010-81225 Bolt 1 15001-
18 01643-31232 Washer 1 15001-
19 22P-979-1880 Bracket 1 15001-
20 01010-81225 Bolt 2 15001-
21 01643-31232 Washer 2 15001-
22 21T-38-71260 Bracket 1 15001-
23 01010-81225 Bolt 1 15001-
24 01643-31232 Washer 1 15001-
25 21W-979-5150 Grommet 1 15001-
26 08034-20536 Band 3 20790-
27 22P-979-1890 Bracket 1 15001-
28 01010-81025 Bolt 1 15001-
29 01643-31032 Washer 1 15001-
30 22P-979-1290 Plate 1 15001-
Reference:K0700-001005A Page:K015006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Air Conditioner Unit, Air Conditioner Piping Mounting (2/2) (#20790-)
Index Code Part Number Description Qty Serial No.
31 01010-81225 Bolt 2 15001-
32 01643-31232 Washer 2 15001-

Reference:K0700-001005A Page:K015006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000792

9
10
3
7
8
5
6
4

11

Reference:K0700-001006 Page:K015007

PC78US-8 S/N 15001-UP


Air Conditioner Unit, Sensor and Receiver (#15001-)
Index Code Part Number Description Qty Serial No.
1 20Y-979-6191 Sensor, Outside Air Temperature 1 15001-
2 04120-21767 V-belt 1 15001-
3 20Y-979-3120 Tank, Receiver 1 15001-
4 22P-979-1140 Clip 2 15001-
5 01010-80816 Bolt 2 15001-
6 01643-30823 Washer 2 15001-
7 17A-911-1671 Joint 1 15001-
8 20Y-979-3150 O-ring 1 15001-
9 01010-80625 Bolt 1 15001-
10 01643-30623 Washer 1 15001-
11 (21W-54-51811) Cover
(21W-54-51811) Cover

Reference:K0700-001006 Page:K015007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Fire Extinguisher
FIG. Name FIG. No.
Fire Extinguisher K0830-003001

Reference:X21-0831291 Page:K016000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000901

1 1
3
2

Reference:K0830-003001 Page:K016001

PC78US-8 S/N 15001-UP


Fire Extinguisher (#15001-)
Index Code Part Number Description Qty Serial No.
1 22B-98-11120 Fire Extinguisher, English 1 15001-
2 01010-D0820 Bolt 2 15001-
3 01643-70823 Washer 2 15001-
4 208-53-11780 Trim 1 15001-

Reference:K0830-003001 Page:K016001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, With Blade, AM-FM Radio, EU
FIG. Name FIG. No.
Floor Frame, Floor, Frame K1110-045001
Floor Frame, PPC Valve for Travel K1110-045002
Floor Frame, Travel Lever and Travel Pedal K1110-045003
Floor Frame, Floor, Footrest, L.H. K1110-045004
Floor Frame, Floor, Base K1110-045005
Floor Frame, Wiring Harness K1110-045006
Floor Frame, Electric Parts K1110-045007
Floor Frame, Wiring Harness Clamp, Floor Frame K1110-045008
Floor Frame, Work Equipment Lever L.H. K1110-045009
Floor Frame, PPC Valve for Work Equipment, L.H. K1110-045010
Floor Frame, Console Box, L.H. (#15506-16168) K1110-045011
Floor Frame, Console Box, L.H. (#16169-) K1110-045011A
Floor Frame, Radio (#15506-28942) K1110-045012
Floor Frame, Radio (#28943-) K1110-045012A
Floor Frame, Work Equipment Lock Lever K1110-045013
Floor Frame, Work Equipment Control Lever, R.H. K1110-045014
Floor Frame, PPC Valve for Work Equipment, R.H. K1110-045015
Floor Frame, Console Box, R.H. K1110-045016
Floor Frame, Starting Switch and Switch K1110-045017
Floor Frame, Air Conditioner Unit K1110-045018
Floor Frame, Air Conditioner Piping K1110-045019
Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping K1110-045020
Floor Frame, PPC Valve Piping Clamp K1110-045021
Floor Frame, P-Block and T-Block K1110-045022
Floor Frame, Plug K1110-045023
Floor Frame, Floor, Footrest, R.H. K1110-045024
Floor Frame, PPC Valve for Blade K1110-045025
Floor Frame, Blade Control Lever K1110-045026

Reference:X22-1095480 Page:K017000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001565
6
3
5 7
4

2
10
11
12
11 13
12
13

Reference:K1110-045001 Page:K017001

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Frame (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-53-13111 Floor 1 15506-
2 22P-53-13121 Plate 1 15506-
3 01010-81016 Bolt 2 15506-
4 01643-31032 Washer 2 15506-
5 22P-53-13130 Plate 1 15506-
6 01010-81016 Bolt 2 15506-
7 01643-31032 Washer 2 15506-
8 07286-03833 Hose 1 15506-
9 07280-04726 Clamp 1 15506-
10 22U-54-25581 Grommet 1 15506-
11 01010-81020 Bolt 4 15506-
12 01643-31032 Washer 4 15506-
13 01643-31032 Washer 4 15506-

Reference:K1110-045001 Page:K017001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY010653
25

23

31
29
30
2 28
3 27
4
6
5
7 26
9 23
8
31
29
30
28
27

18

24
11
19
13
10
22
21
11
12 20
19 18
15
14 17
16
19
20

12
21
22

Reference:K1110-045002 Page:K017002

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Travel (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-04271 Valve Assembly, PPC 1 21285-
702-16-04270 Valve Assembly, PPC 1 15001-21284
1 C1 Valve Body 1 15001-
2 C1 Valve 4 21285-
C1 Valve 4 15001-21284
3 702-16-51140 Shim, T=0.30mm 4 15001-
4 702-16-53420 Spring 4 15001-
5 702-16-53140 Retainer 4 15001-
6 702-16-54420 Spring 4 15001-
7 702-16-53170 Piston 4 15001-
8 702-16-71150 Seal 4 15001-
9 702-16-71160 Seat 4 15001-
10 C1 Case 1 15001-
11 C1 Lever 2 15001-
12 C1 Shaft 2 15001-
13 702-16-73640 Plate 1 15001-
14 01010-80855 Bolt 2 15001-
15 01643-30823 Washer 2 15001-
16 01010-80820 Bolt 4 21285-
01010-80816 Bolt 4 15001-21284
17 702-16-54331 Washer, T=1.60mm 4 15001-
702-16-54341 Washer, T=1.30mm 4 15001-
702-16-54351 Washer, T=1.00mm 4 15001-
702-16-56380 Washer, T=1.90mm 4 15001-
702-16-56390 Washer, T=2.20mm 4 15001-
18 C1 Pin, Spring 2 15001-
19 C1 Bushing 4 15001-
20 C1 O-ring 2 15001-
21 702-16-73610 Damper Assembly 2 15001-
22 01023-10306 Screw 4 15001-
Reference:K1110-045002 Page:K017002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, PPC Valve for Travel (#15001-)
Index Code Part Number Description Qty Serial No.
23 C1 Pin 2 15001-
24 04022-04016 Pin, Dowel 2 15001-
25 C1 Plug 2 15001-
26 C1 Plug 2 15001-
27 07040-11209 Plug 3 15001-
28 07002-11223 O-ring 3 15001-
29 C1 Ball 3 15001-
30 C1 Plug 3 15001-
31 C1 Seat 3 15001-

Reference:K1110-045002 Page:K017002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000753
19 20
11
12
18
10 17

16
13
5 17
14
6
3
4 15

10
8 12
11
9 21
27
22 7 28
1
23
14
2 13

25
24
30 26
29
30
30
29 33
30 34
31 30
34 29
30
32
34

Reference:K1110-045003 Page:K017003

PC78US-8 S/N 15001-UP


Floor Frame, Travel Lever and Travel Pedal (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-81020 Bolt 2 15506-
2 01643-31032 Washer 2 15506-
3 20Y-43-41361 Collar 4 15506-
4 20Y-43-41121 Cover 1 15506-
5 01010-81020 Bolt 4 15506-
6 01643-31032 Washer 4 15506-
7 203-43-51620 Spring 2 15506-
22U-43-21350 Cover Assembly 2 15506-
8 C1 Cover 1 15506-
9 22U-43-21360 Seal 1 15506-
10 20Y-43-41111 Lever 2 15506-
11 01010-D1045 Bolt 4 15506-
12 01643-71032 Washer 4 15506-
13 01010-81030 Bolt 4 15506-
14 01643-31032 Washer 4 15506-
15 22U-43-21111 Pedal 1 15506-
16 22U-43-21121 Pedal 1 15506-
17 21W-43-41441 Lever 2 15506-
18 20Y-43-21231 Knob 1 15506-
19 20Y-43-21241 Knob 1 15506-
20 01023-20416 Screw 2 15506-
21 7861-93-1840 Sensor, Pressure 1 15506-
07000-12011 O-ring 1 15506-
22 20Y-62-18910 Plug 1 15506-
23 07000-12018 O-ring 2 15506-
24 02781-00210 Union 1 15506-
25 07002-11423 O-ring 1 15506-
26 02896-11008 O-ring 1 15506-
27 22P-62-15270 Nipple 1 15506-
28 07002-11423 O-ring 1 15506-
Reference:K1110-045003 Page:K017003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Travel Lever and Travel Pedal (#15506-)
Index Code Part Number Description Qty Serial No.
29 21W-62-44640 Joint 4 15506-
30 07000-12015 O-ring 8 15506-
31 21W-62-44650 Union 1 15506-
32 21W-62-44660 Union 2 15506-
33 21W-62-44670 Union 1 15506-
34 02896-11008 O-ring 4 15506-

Reference:K1110-045003 Page:K017003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000754
3
4
1

5
6
2

Reference:K1110-045004 Page:K017004

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Footrest, L.H. (#15506-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25110 Footrest 1 15506-
2 22P-43-13680 Plate 1 15506-
3 01010-81025 Bolt 2 15506-
4 01643-31032 Washer 2 15506-
5 01010-81020 Bolt 1 15506-
6 01643-31032 Washer 1 15506-

Reference:K1110-045004 Page:K017004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000755
12

6 5
14
4
13

14 16
8 15
13 17

2 10
18
3
11
9

Reference:K1110-045005 Page:K017005

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Base (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-43-13442 Bracket 1 15506-
2 01010-D1235 Bolt 6 15506-
3 01643-71232 Washer 6 15506-
4 22M-43-21220 Adjuster 1 15506-
5 01252-80816 Bolt 3 15506-
6 22M-43-21230 Adjuster 1 15506-
7 01252-80816 Bolt 3 15506-
8 22P-43-13371 Pipe 1 15506-
9 22P-43-13351 Stopper 1 15506-
10 01010-D1020 Bolt 2 15506-
11 01643-71032 Washer 2 15506-
12 22P-43-13461 Frame 1 15506-
13 01252-80825 Bolt 6 15506-
14 01643-80823 Washer 6 15506-
15 21W-43-56130 Cover 1 15703-
22B-43-23461 Cover 1 15506-15702
16 01010-81020 Bolt 2 15506-
17 01643-31032 Washer 2 15506-
18 22B-43-23590 Trim 1 15506-

Reference:K1110-045005 Page:K017005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA009670
5 3
24 6 5
1 25 5 2
3 4
26 5
2 6
6 5
6 3
5

14

15 28
17 27
16
30
20
29
19
18

8 9

7
12 13
8 9

8 9
10 11
1

32
21
23 31
22

Reference:K1110-045006 Page:K017006

PC78US-8 S/N 15001-UP


Floor Frame, Wiring Harness (#15506-)
Index Code Part Number Description Qty Serial No.
1 21W-06-51114 Wiring Harness 1 15872-
21W-06-51113 Wiring Harness 1 15506-15871
2 08041-03000 Fuse, 30Amp. 2 15506-
3 08041-02000 Fuse, 20Amp. 3 15506-
4 08041-01500 Fuse, 15Amp. 1 15506-
5 08041-01000 Fuse, 10Amp. 9 15506-
6 08041-00500 Fuse, 5Amp. 5 15506-
7 20T-06-81230 Fusible Link, 45Amp. 2 15506-
8 HM6440-0129 F-Connector, Pink 5 15506-
9 HM6440-0128 M-Connector, Pink 5 15506-
10 HM6400-0013 F-Connector, Green 1 15506-
11 HM6409-0072 M-Connector, Green 1 15506-
12 HM6400-0012 F-Connector, Black 1 15506-
13 HM6409-0071 M-Connector, Black 1 15506-
14 22P-06-11840 Bracket 1 15506-
15 600-815-2170 Switch, Heater, Ribbon Heater Relay 1 15506-
16 01010-80616 Bolt 2 15506-
17 01643-30623 Washer 2 15506-
18 01010-80816 Bolt 2 15506-
19 01643-30823 Washer 2 15506-
20 04434-50610 Clip 1 15506-
21 04434-51910 Clip 1 15506-
22 01010-81020 Bolt 1 15506-
23 01643-31032 Washer 1 15506-
24 08038-02027 Cap 1 15506-
25 08038-04030 Cap 1 15506-
26 08038-00519 Cap 1 15506-
27 01010-81020 Bolt 3 15506-
28 01643-31032 Washer 3 15506-
29 01010-80816 Bolt 1 15506-
Reference:K1110-045006 Page:K017006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Wiring Harness (#15506-)
Index Code Part Number Description Qty Serial No.
30 01643-30823 Washer 1 15506-
31 22B-54-23221 Grommet 1 15506-
32 08034-20536 Band 1 15506-

Reference:K1110-045006 Page:K017006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000757
3
4

2 1

16
6
7
17
5
17
21 22
23
25
23 24 8
22 21
21

19
20 11
18
15

10

14
13
14 13
12 12

Reference:K1110-045007 Page:K017007

PC78US-8 S/N 15001-UP


Floor Frame, Electric Parts (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-06-11432 Bracket 1 19304-
A2 22P-06-11431 Bracket 1 15506-19303
2 7835-46-7002 Controller 1 15872-
7835-46-7001 Controller 1 15506-15871
3 01010-80820 Bolt 4 15506-
4 01643-30823 Washer 4 15506-
5 7861-94-3000 Resistor 1 15506-
6 01010-80816 Bolt 2 15506-
7 01643-30823 Washer 2 15506-
8 22B-06-21430 Wiring Harness 1 15506-
9 208-43-71420 Cap 2 15506-
10 08211-01920 Clip 1 15506-
11 08211-01020 Clip 1 15506-
12 04434-52711 Clip 2 15506-
13 01010-80816 Bolt 2 15506-
14 01643-30823 Washer 2 15506-
15 01023-10620 Screw 2 15506-
16 22P-06-11370 Sheet 1 15506-
17 22U-43-23290 Clip 3 15506-
18 04434-51908 Clip 1 15506-
19 01010-80816 Bolt 1 15506-
20 01643-30823 Washer 1 15506-
21 7861-74-5100 Relay 7 15506-
22 01010-80612 Bolt 8 15506-
23 01643-30623 Washer 8 15506-
24 8233-06-3350 Diode 3 15506-
25 421-07-31270 Relay 2 15506-

Reference:K1110-045007 Page:K017007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001477

12 2
11 7
14 8
13 18 22 15
26
21
28
23 4
27 17 3
18
16
25 10
20 6
24 9
21 19 5

Reference:K1110-045008 Page:K017008

PC78US-8 S/N 15001-UP


Floor Frame, Wiring Harness Clamp, Floor Frame (#15506-)
Index Code Part Number Description Qty Serial No.
1 08211-01520 Clip 1 15506-
2 04434-53411 Clip 1 15506-
3 01010-81025 Bolt 1 15506-
4 01643-31032 Washer 1 15506-
5 01010-80816 Bolt 2 15506-
6 01643-30823 Washer 2 15506-
7 04434-52711 Clip 1 15506-
8 07095-20420 Cushion 1 15506-
9 01010-81020 Bolt 1 15506-
10 01643-31032 Washer 1 15506-
11 155-61-15350 Clip 1 15506-
12 22M-62-13660 Cushion 1 15506-
13 01010-81020 Bolt 1 15506-
14 01643-31032 Washer 1 15506-
15 04434-53411 Clip 1 15506-
16 01010-81020 Bolt 1 15506-
17 01643-31032 Washer 1 15506-
18 04434-53411 Clip 2 15506-
19 01010-81020 Bolt 2 15506-
20 01643-31032 Washer 2 15506-
21 08211-00720 Clip 2 15506-
22 08211-01020 Clip 1 15506-
23 04434-51010 Clip 1 15506-
24 01010-81020 Bolt 1 15506-
25 01643-31032 Washer 1 15506-
26 08193-20010 Clip 1 15506-
27 01010-81020 Bolt 1 15506-
28 01643-31032 Washer 1 15506-

Reference:K1110-045008 Page:K017008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001494

9
1 8
5

Reference:K1110-045009 Page:K017009

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Lever L.H. (#15506-)
Index Code Part Number Description Qty Serial No.
20Y-43-22611 Lever Assembly 1 15506-
1 20Y-43-22211 Lever 1 15506-
20Y-43-22621 Knob 1 15506-
2 20Y-43-22630 Knob 1 15506-
3 20Y-43-22421 Insert 1 15506-
4 20Y-43-22250 Plate 1 15506-
5 20Y-43-22261 Boot 1 15506-
6 20Y-43-22370 Boot 1 15506-
7 600-411-1280 Nut 1 15506-
8 01252-41025 Bolt 1 15506-
9 01643-51032 Washer 1 15506-

Reference:K1110-045009 Page:K017009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011336
19

13

18

16
17

15

14

11
11 12

12
10
10 7
7
8
9
6
6 5
5
4
4
1

2
3

Reference:K1110-045010 Page:K017010

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Work Equipment, L.H. (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-04510 Valve, Pilot 1 15506-
1 C1 Body, Valve 1 15506-
2 C1 Plug 2 15506-
3 C1 Plug 2 15506-
4 C1 Valve 4 15506-
5 702-16-51140 Shim, T=0.30mm 4 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
6 702-16-71350 Spring 4 15506-
7 702-16-53140 Retainer 4 15506-
8 702-16-53470 Spring 2 15506-
9 702-16-53590 Spring 2 15506-
10 702-16-53170 Piston 4 15506-
11 702-16-71150 Seal 4 15506-
12 702-16-71160 Seat 4 15506-
13 702-16-71280 Boot 1 15506-
14 702-16-71141 Plate 1 15506-
15 702-16-71131 Plate 1 15506-
16 01010-80620 Bolt 4 15506-
17 702-16-51240 Joint, Universal 1 15506-
18 702-16-71361 Disc 1 15506-
19 702-16-71441 Nut 1 15506-

Reference:K1110-045010 Page:K017010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000762

5 37
4 3 36
6 39
27
29 1 38
20 2 8
7
20 17 4 56
9
20 40
13 52
41 51 54 53
21 13 26
42
28 19
29 18 43 33

34 13
15
35 16
25
22 24 10
23 14 57

12 57
11 33
50
49
33
30
33
45
31 46
32 50 44

55
50
48
47

Reference:K1110-045011 Page:K017011

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, L.H. (#15506-16168)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15506-@
2 01643-30823 Washer 4 15506-@
3 20Y-62-18910 Plug 1 15506-@
4 07000-12018 O-ring 2 15506-@
5 20Y-62-18890 Bolt, Joint 1 15506-@
6 07000-12015 O-ring 2 15506-@
7 02781-0021D Union 4 15506-@
8 07002-11423 O-ring 4 15506-@
9 02896-11008 O-ring 4 15506-@
10 22B-43-23112 Frame 1 15506-@
11 01010-D1030 Bolt 4 15506-@
12 01643-71032 Washer 4 15506-@
13 06124-01616 Bearing 4 15506-@
14 22B-43-23721 Bracket 1 15506-@
15 22B-43-23161 Shaft 1 15506-@
16 01435-00612 Bolt 1 15506-@
17 22B-43-23471 Spring 1 15506-@
18 04050-12015 Pin, Cotter 1 15506-@
19 01640-20816 Washer 1 15506-@
20 426-925-3981 Washer 3 15506-@
21 22B-43-23142 Guide 1 15506-@
22 04205-30832 Pin 2 15506-@
23 21U-43-32430 Collar 2 15506-@
24 04050-12015 Pin, Cotter 2 15506-@
25 01640-20816 Washer 2 15506-@
26 21U-43-32380 Spring, Gas 1 15506-@
27 04050-12015 Pin, Cotter 1 15506-@
28 04050-13015 Pin, Cotter 1 15506-@
29 01640-20816 Washer 2 15506-@
30 22B-06-21420 Switch, Work Equipment Lock 1 15506-@
Reference:K1110-045011 Page:K017011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, L.H. (#15506-16168)
Index Code Part Number Description Qty Serial No.
31 22U-06-22490 Plate 1 15506-@
32 01023-60320 Screw 2 15506-@
33 08059-00310 Clip 4 15506-16168
34 20Y-54-11611 Stopper 1 15506-@
35 01580-11008 Nut 1 15506-@
36 208-06-19170 Clip 1 15506-@
37 04434-51410 Clip 1 15506-@
38 01010-81025 Bolt 1 15506-@
39 01643-31032 Washer 1 15506-@
40 22B-43-23213 Cover 1 15506-@
41 01010-80616 Bolt 4 15506-@
42 01643-30623 Washer 4 15506-@
43 20Y-43-41290 Collar 4 15506-@
44 22B-43-23221 Cover 1 15506-@
45 01245-00616 Screw 2 15506-@
46 01643-70623 Washer 2 15506-@
47 01010-80616 Bolt 1 15506-@
48 01643-30623 Washer 1 15506-@
49 01435-00616 Bolt 4 15506-@
50 20Y-43-41290 Collar 7 15506-@
51 22B-43-23231 Cover 1 15506-@
52 01245-00616 Screw 2 15506-@
53 01643-70623 Washer 2 15506-@
54 20Y-43-41290 Collar 2 15506-@
55 22B-43-23271 Cover 1 15506-@
56 08059-00515 Clip 1 15506-16168
57 22B-43-23280 Seal 2 15506-@

Reference:K1110-045011 Page:K017011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006698

5 37
4 3 36
6 39
27
29 1 38
20 2 8
7
20 17 4
9 56
20
40
13 52
41 51 54 53
21 13 26
42
28 19
29 18 43 56

34 13
15
35 16
25
22 24 10
23 14 57

12 57
11
33
50
49
33
30
33
45
31 46
32 50 44

55
50
48
47

Reference:K1110-045011A Page:K017012

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, L.H. (#16169-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15506-
2 01643-30823 Washer 4 15506-
3 20Y-62-18910 Plug 1 15506-
4 07000-12018 O-ring 2 15506-
5 20Y-62-18890 Bolt, Joint 1 15506-
6 07000-12015 O-ring 2 15506-
7 02781-0021D Union 4 15506-
8 07002-11423 O-ring 4 15506-
9 02896-11008 O-ring 4 15506-
10 22B-43-23112 Frame 1 15506-
11 01010-D1030 Bolt 4 15506-
12 01643-71032 Washer 4 15506-
13 06124-01616 Bearing 4 15506-
14 22B-43-23722 Bracket 1 19440-
A2 22B-43-23721 Bracket 1 15506-19439
15 22B-43-23161 Shaft 1 15506-
16 01435-00612 Bolt 1 15506-
17 22B-43-23471 Spring 1 15506-
18 04050-12015 Pin, Cotter 1 15506-
19 01640-20816 Washer 1 15506-
20 426-925-3981 Washer 3 15506-
21 22B-43-23143 Guide 1 19440-
A2 22B-43-23142 Guide 1 15506-19439
22 04205-30835 Pin 2 15506-
23 21U-43-32430 Collar 2 15506-
24 04050-12015 Pin, Cotter 2 15506-
25 01640-20816 Washer 2 15506-
26 21U-43-32380 Spring, Gas 1 15506-
27 04050-12015 Pin, Cotter 1 15506-
28 04050-13015 Pin, Cotter 1 15506-
Reference:K1110-045011A Page:K017012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, L.H. (#16169-)
Index Code Part Number Description Qty Serial No.
29 01640-20816 Washer 2 15506-
30 22B-06-21420 Switch, Work Equipment Lock 1 15506-
31 22U-06-22490 Plate 1 15506-
32 01023-60320 Screw 2 15506-
33 08059-00310 Clip 3 16169-
34 20Y-54-11611 Stopper 1 15506-
35 01580-11008 Nut 1 15506-
36 208-06-19170 Clip 1 15506-
37 04434-51410 Clip 1 15506-28942
38 01010-81025 Bolt 1 15506-
39 01643-31032 Washer 1 15506-
40 22B-43-23213 Cover 1 15506-
41 01010-80616 Bolt 4 15506-
42 01643-30623 Washer 4 15506-
43 20Y-43-41290 Collar 4 15506-
44 22B-43-23221 Cover 1 15506-
45 01245-00616 Screw 2 15506-
46 01643-70623 Washer 2 15506-
47 01010-80616 Bolt 1 15506-
48 01643-30623 Washer 1 15506-
49 01435-00616 Bolt 4 15506-
50 20Y-43-41290 Collar 7 15506-
51 22B-43-23231 Cover 1 15506-
52 01245-00616 Screw 2 15506-
53 01643-70623 Washer 2 15506-
54 20Y-43-41290 Collar 2 15506-
55 22B-43-23271 Cover 1 15506-
56 08059-00515 Clip 2 16169-
57 22B-43-23280 Seal 2 15506-

Reference:K1110-045011A Page:K017012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001502
4 3
16
5
1 2
13
10 15
4
5 11
17
2 9
3

14
8
6 7
14

12

Reference:K1110-045012 Page:K017013

PC78US-8 S/N 15001-UP


Floor Frame, Radio (#15506-28942)
Index Code Part Number Description Qty Serial No.
1 2A5-06-11932 Radio 1 28943-@
A2 20Y-06-42430 Radio 1 15893-28942
A2 20Y-06-41238 Radio 1 15506-15892
2 20Y-43-41482 Plate 2 15506-@
3 01023-60510 Screw 6 15506-@
4 01010-80616 Bolt 4 15506-@
5 01643-30623 Washer 4 15506-@
6 22B-43-23171 Bracket 1 15506-@
7 01010-80616 Bolt 2 15506-@
8 01643-30623 Washer 2 15506-@
9 22B-43-23181 Bracket 1 15506-@
10 01010-80616 Bolt 2 15506-@
11 01643-30623 Washer 2 15506-@
12 21W-06-61170 Wiring Harness 1 28943-@
A2 21W-06-51271 Wiring Harness 1 16169-28942
A2 21W-06-51270 Wiring Harness 1 15506-16168
13 08034-20414 Band, Black 2 15506-28942
14 08034-20519 Band 2 15506-28942
15 22B-54-28990 Sheet 1 15506-@
16 20Y-06-41830 Wiring Harness 1 15506-28942
17 08912-51600 Cord 1 15506-28942

Reference:K1110-045012 Page:K017013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014576
4
3
5
1 2

10 13
4
11
5
9
2 15 14
3
13
12 16
6
12

15
13

8 13
7

Reference:K1110-045012A Page:K017014

PC78US-8 S/N 15001-UP


Floor Frame, Radio (#28943-)
Index Code Part Number Description Qty Serial No.
1 2A5-06-11932 Radio 1 28943-
2 20Y-43-41482 Plate 2 15506-
3 01023-60510 Screw 6 15506-
4 01010-80616 Bolt 4 15506-
5 01643-30623 Washer 4 15506-
6 22B-43-23171 Bracket 1 15506-
7 01010-80616 Bolt 2 15506-
8 01643-30623 Washer 2 15506-
9 22B-43-23181 Bracket 1 15506-
10 01010-80616 Bolt 2 15506-
11 01643-30623 Washer 2 15506-
12 21W-06-61170 Wiring Harness 1 28943-
13 08034-20519 Band 4 28943-
14 22B-54-28990 Sheet 1 15506-
15 566-07-12151 Cable 1 28943-
16 04434-51410 Clip 1 28943-

Reference:K1110-045012A Page:K017014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000764

2 1

Reference:K1110-045013 Page:K017015

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Lock Lever (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-43-13111 Lever 1 15506-
2 22U-43-22490 Knob 1 15506-
3 20T-43-71280 Pin 1 15506-

Reference:K1110-045013 Page:K017015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA022737
3

7
4

10
11
1
12

Reference:K1110-045014 Page:K017016

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Control Lever, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
22U-43-21172 Lever Assembly 1 15506-
1 20Y-43-22221 Lever 1 15506-
22U-43-21192 Knob 1 15506-
2 C1 Screw 1 15506-
3 20Y-43-22390 Knob 1 15506-
4 20Y-43-22421 Insert 1 15506-
5 22U-43-21211 Switch 1 15506-
6 20Y-43-22250 Plate 1 15506-
7 20Y-43-22261 Boot 1 15506-
8 20Y-43-22370 Boot 1 15506-
9 600-411-1280 Nut 1 15506-
10 01252-41025 Bolt 1 15506-
11 01643-51032 Washer 1 15506-
12 08034-40521 Band 1 15506-

Reference:K1110-045014 Page:K017016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011336
19

13

18

16
17

15

14

11
11 12

12
10
10 7
7
8
9
6
6 5
5
4
4
1

2
3

Reference:K1110-045015 Page:K017017

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Work Equipment, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-04510 Valve, Pilot 1 15506-
1 C1 Body, Valve 1 15506-
2 C1 Plug 2 15506-
3 C1 Plug 2 15506-
4 C1 Valve 4 15506-
5 702-16-51140 Shim, T=0.30mm 4 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
6 702-16-71350 Spring 4 15506-
7 702-16-53140 Retainer 4 15506-
8 702-16-53470 Spring 2 15506-
9 702-16-53590 Spring 2 15506-
10 702-16-53170 Piston 4 15506-
11 702-16-71150 Seal 4 15506-
12 702-16-71160 Seat 4 15506-
13 702-16-71280 Boot 1 15506-
14 702-16-71141 Plate 1 15506-
15 702-16-71131 Plate 1 15506-
16 01010-80620 Bolt 4 15506-
17 702-16-51240 Joint, Universal 1 15506-
18 702-16-71361 Disc 1 15506-
19 702-16-71441 Nut 1 15506-

Reference:K1110-045015 Page:K017017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001508
1
2
34
5 35
4 3
6
4 36
8

7
6
9
16
33
17
18

26
16
17
18 10
15
27
29 28
31
30

11
12
24
25
32

37 14
13

25
23
22

19
25
21
20

Reference:K1110-045016 Page:K017018

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15506-
2 01643-30823 Washer 4 15506-
3 20Y-62-18910 Plug 1 15506-
4 07000-12018 O-ring 2 15506-
5 20Y-62-18890 Bolt, Joint 1 15506-
6 07000-12015 O-ring 2 15506-
7 02781-0021D Union 4 15506-
8 07002-11423 O-ring 4 15506-
9 02896-11008 O-ring 4 15506-
10 22P-43-13261 Frame 1 15506-
11 01010-D1230 Bolt 4 15506-
12 01643-71232 Washer 4 15506-
13 22U-43-23251 Sheet 1 15506-
14 22U-43-23290 Clip 2 15506-
15 20Y-43-41324 Cover 1 18212-
20Y-43-41323 Cover 1 15506-18211
16 01010-80616 Bolt 4 15506-
17 01643-30623 Washer 4 15506-
18 20Y-43-41290 Collar 4 15506-
19 22P-43-13240 Cover 1 15506-
20 01245-00616 Screw 2 15506-
21 01643-70623 Washer 2 15506-
22 01010-80616 Bolt 1 15506-
23 01643-30623 Washer 1 15506-
24 01435-00616 Bolt 2 15506-
25 20Y-43-41290 Collar 5 15506-
26 22B-43-23251 Cover 1 15506-
27 01245-00616 Screw 2 15506-
28 01643-70623 Washer 2 15506-
29 20Y-43-41290 Collar 2 15506-
Reference:K1110-045016 Page:K017018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
30 01245-00616 Screw 3 15506-
31 01643-70623 Washer 3 15506-
32 09415-02512 Cap 1 15506-
33 208-06-19170 Clip 1 15506-
34 01010-81030 Bolt 1 15506-
35 01643-31032 Washer 1 15506-
36 103-21-21260 Boss 1 15506-
37 21W-43-51130 Seal 1 15506-

Reference:K1110-045016 Page:K017018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001540
9
8

12

6 12
10
5
2
13
3 14
4

11

Reference:K1110-045017 Page:K017019

PC78US-8 S/N 15001-UP


Floor Frame, Starting Switch and Switch (#15001-)
Index Code Part Number Description Qty Serial No.
1 08086-20000 Switch, Starting 1 15001-
2 20Y-43-41740 Plate 1 15001-
3 20Y-43-41750 Washer 3 15001-
4 20Y-43-41790 Washer 1 15001-
5 22U-06-22380 Potentiometer 1 15001-
6 22U-06-22460 Spring 1 15001-
7 20Y-43-41781 Knob 1 18494-
20Y-43-41780 Knob 1 15001-18493
8 20Y-06-42450 Switch, Lamp 1 28942-
A2 20Y-06-42121 Switch, Lamp 1 15001-28941
9 20Y-06-42190 Cover 4 15001-
10 21W-06-51240 Wiring Harness 1 15001-
11 22U-43-23260 Clip 1 15001-
12 04434-51710 Clip 2 15001-
13 01010-81016 Bolt 2 15001-
14 01643-31032 Washer 2 15001-

Reference:K1110-045017 Page:K017019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000768
3

35

36 49
38
19
50 40 48
39 39
34 45
41 43
47
42 26 34
39
46 20
43
34 5 11
52
42 33 7
26 34 13
44
30 10

34 2

21 6 9 8

12 14
37 28
29 15
22
34 16

27
4
27

1 17
24

23
29

25 31

32 51
34
19
18

Reference:K1110-045018 Page:K017020

PC78US-8 S/N 15001-UP


Floor Frame, Air Conditioner Unit (#15506-)
Index Code Part Number Description Qty Serial No.
22B-979-2703 Air Conditioner Assembly 1 28941-
A2 22B-979-2702 Air Conditioner Assembly 1 20782-28940
A2 22B-979-2701 Air Conditioner Assembly 1 15506-20781
1 ND245450-6630 Case 1 15506-
2 ND245450-6640 Case 1 15506-
3 ND245450-6650 Case 1 15506-
4 ND116576-8040 Plate 1 15506-
ND446010-4660 Evaporator Assembly 1 15506-
5 ND446600-1472 Evaporator 1 15506-
6 ND949142-0020 O-ring 1 15506-
7 ND949142-0030 O-ring 1 15506-
8 ND446250-5990 Tube 1 15506-
9 ND447500-2980 Valve 1 19806-
A2 ND447500-2660 Valve 1 15506-19805
10 ND949046-3100 Bolt 1 15506-
11 ND146687-2091 Packing 1 15506-
12 ND146687-2080 Packing 1 15506-
13 ND146687-6350 Packing 1 15506-
14 ND146657-8850 Packing 1 15506-
15 ND949046-3610 Bolt 2 15506-
16 ND445021-3091 Plug 1 28941-
ND445021-3941 Plug 1 15506-28940
17 ND116420-6830 Heater 1 15506-
18 ND116340-8820 Motor Assembly 1 15506-
19 ND949008-0330 Screw, Tapping 4 15506-
20 ND077800-1130 Transistor 1 28941-
ND077800-1040 Transistor 1 15506-28940
21 ND077500-5890 Thermistor Assembly 1 15506-
22 ND246790-2060 Clamp 1 15506-
23 ND077500-0650 Thermistor 1 15506-
Reference:K1110-045018 Page:K017020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Air Conditioner Unit (#15506-)
Index Code Part Number Description Qty Serial No.
24 ND017661-3700 Clamp 1 15506-
25 ND063600-4580 Servo Motor Assembly 1 15506-
26 ND063800-0300 Servo Motor Assembly 2 15506-
27 ND116660-0600 Door 2 15506-
28 ND116740-2290 Door 1 28941-
ND116640-8051 Dumper 1 15506-28940
29 ND116650-9870 Door 2 15506-
30 ND017231-1400 Clamp 1 15506-
31 ND116682-0670 Lever 1 15506-
32 ND116662-8420 Shaft 1 15506-
33 ND017212-1720 Lock 1 15506-
34 ND949001-1730 Screw, Tapping 38 15506-
35 ND146687-6360 Packing 1 15506-
36 ND146687-6370 Packing 1 15506-
37 ND146687-6380 Packing 1 15506-
38 ND145530-1210 Filter, Recirculation Air 1 15506-
39 ND949008-0460 Screw, Tapping 3 15506-
40 ND116576-8050 Plate 1 15506-
41 ND116576-8060 Plate 1 15506-
42 ND116780-4690 Lever 2 15506-
43 ND116780-4700 Lever 2 15506-
44 ND116780-4710 Lever 1 15506-
45 ND116682-7310 Lever 1 15506-
46 ND116782-1370 Lever 1 15506-
47 ND116662-8430 Shaft 1 15506-
48 ND116662-8440 Shaft 1 15506-
49 ND246470-5634 Wiring Harness 1 28941-
ND246470-5631 Wiring Harness 1 15506-28940
50 ND246780-1370 Clamp 1 15506-
51 ND146687-6400 Packing 1 15506-
52 ND017780-3110 Cable 1 15506-

Reference:K1110-045018 Page:K017020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001513
8

9
10
11

1 7
4
2
3

5 6

17 16
20 14
13 15

12

21

17
15
22

20 23

21
16
18
14
19

Reference:K1110-045019 Page:K017021

PC78US-8 S/N 15001-UP


Floor Frame, Air Conditioner Piping (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-80825 Bolt 5 15506-
2 01643-30823 Washer 5 15506-
3 208-979-7540 Collar 5 15506-
4 22P-53-13141 Bracket 1 15506-
5 01010-D0616 Bolt 1 15506-
6 01643-70623 Washer 1 15506-
7 08211-01520 Clip 1 15506-
8 22B-979-2781 Duct 1 15506-
9 01010-80825 Bolt 2 15506-
10 01643-30823 Washer 2 15506-
11 208-979-7540 Collar 2 15506-
12 22P-979-1850 Hose 1 15506-
13 22P-979-1870 Hose 1 15506-
14 21W-979-5111 Hose 1 15506-
15 20Y-979-3150 O-ring 2 15506-
16 21W-979-5121 Hose 1 15506-
17 20Y-979-3130 O-ring 2 15506-
18 208-979-7650 Connector 1 15506-
19 01435-40620 Bolt 1 15506-
20 21W-979-5131 Hose 1 15506-
21 21W-979-5141 Hose 1 15506-
22 09479-02400 Clip 2 15506-
23 08034-20536 Band 1 15506-

Reference:K1110-045019 Page:K017021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001518
30 23 33
29
32
33
21 34 20
34
13 15 17
27 12
15
31 32 25 15 19
8
10 3
16
6
14
18
4

30
32
2 24

13 29
22 21 34
15 34 33 23 33
17
7 6 16
11
5 14 12
9
28 10 19
4 15
26 18
25 8
32 15
31
27

35

Reference:K1110-045020 Page:K017022

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-62-15151 Hose 1 15506-
2 22P-62-15371 Hose 1 15506-
3 22P-62-15202 Hose Assembly 1 21086-
A1 22P-62-15201 Hose Assembly 1 15506-21085
4 22P-62-15332 Hose 1 21086-
A1 22P-62-15331 Hose 1 15506-21085
5 20U-62-22190 O-ring 1 15506-
6 22P-62-15292 Hose 1 21086-
A1 22P-62-15291 Hose 1 15506-21085
7 20U-62-22190 O-ring 1 15506-
8 22P-62-15232 Hose 1 21086-
A1 22P-62-15231 Hose 1 15506-21085
9 20U-62-22190 O-ring 1 15506-
10 22P-62-15332 Hose 1 21086-
A1 22P-62-15331 Hose 1 15506-21085
11 20U-62-22190 O-ring 1 15506-
12 22P-62-15211 Hose 1 15506-
13 22P-62-15121 Hose 1 15506-
14 20Y-62-22860 Band, Brown 2 15506-
15 20Y-62-22850 Band, Green 6 15506-
16 20Y-62-22830 Band, White 2 15506-
17 20Y-62-22820 Band, Blue 2 15506-
18 21U-62-34740 Band, Orange 2 15506-
19 20Y-62-22790 Band, Red 2 15506-
20 22P-62-15102 Hose Assembly 1 21086-
A1 22P-62-15101 Hose Assembly 1 15506-21085
21 22P-62-15142 Hose 1 21086-
A1 22P-62-15141 Hose 1 15506-21085
22 20U-62-22190 O-ring 1 15506-
23 22P-62-15132 Hose 1 21086-
Reference:K1110-045020 Page:K017022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping (#15506-)
Index Code Part Number Description Qty Serial No.
23 A1 22P-62-15131 Hose 1 15506-21085
24 20U-62-22190 O-ring 1 15506-
25 22P-62-15142 Hose 1 21086-
A1 22P-62-15141 Hose 1 15506-21085
26 20U-62-22190 O-ring 1 15506-
27 22P-62-15282 Hose 1 21086-
A1 22P-62-15281 Hose 1 15506-21085
28 20U-62-22190 O-ring 1 15506-
29 22P-62-15111 Hose 1 15506-
30 22P-62-15191 Hose 1 15506-
31 20Y-62-22840 Band, Black 2 15506-
32 20Y-62-22820 Band, Blue 6 15506-
33 20Y-62-22810 Band, Yellow 4 15506-
34 20Y-62-22790 Band, Red 4 15506-
35 22P-62-15261 Hose 1 15506-

Reference:K1110-045020 Page:K017022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001542
1

13 14
17
15
16
18 2

4
18

7
4
3

4
10
6
7 7 5
10 12
11
9
8

Reference:K1110-045021 Page:K017023

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve Piping Clamp (#15001-)
Index Code Part Number Description Qty Serial No.
1 08034-20536 Band 3 15001-
2 134-03-61410 Band 2 15001-
3 21W-54-42291 Grommet 1 15001-
4 04434-53411 Clip 3 15001-
5 01010-81020 Bolt 3 15001-
6 01643-31032 Washer 3 15001-
7 04434-52711 Clip 3 15001-
8 01010-81020 Bolt 2 15001-
9 01643-31032 Washer 2 15001-
10 04434-52711 Clip 2 15001-
11 01010-81020 Bolt 2 15001-
12 01643-31032 Washer 2 15001-
13 22P-53-13151 Grommet 1 15001-
14 08034-20536 Band 1 15001-
15 208-06-19170 Clip 1 15001-
16 01010-81020 Bolt 1 15001-
17 01643-31032 Washer 1 15001-
18 04435-51510 Clip 2 15001-

Reference:K1110-045021 Page:K017023
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001557

9
21 8 5
18 8
7
8
8
20 6
16
20 23 1 9
24 8 4
7 8
9
22 20
15 10
21 11
19 3
20 11
20 2
17 8 10
21 4
12 20 9
24 15
23 21
14
13

Reference:K1110-045022 Page:K017024

PC78US-8 S/N 15001-UP


Floor Frame, P-Block and T-Block (#15506-)
Index Code Part Number Description Qty Serial No.
1 21W-62-42351 Block 1 15506-
2 01010-80845 Bolt 2 15506-
3 01643-30823 Washer 2 15506-
4 02781-0021D Union 2 15506-
5 11Y-62-12230 Union 1 15506-
6 07040-11409 Plug 1 15506-
7 02783-10210 Elbow 2 15506-
8 07002-11423 O-ring 6 15506-
9 02896-11008 O-ring 5 15506-
10 07040-11007 Plug 2 15506-
11 07002-11023 O-ring 2 15506-
12 21W-62-42351 Block 1 15506-
13 01010-80845 Bolt 2 15506-
14 01643-30823 Washer 2 15506-
15 02781-0021D Union 2 15506-
16 07040-11409 Plug 1 15506-
17 11Y-62-12230 Union 1 15506-
18 02782-10210 Elbow 1 15506-
19 11Y-62-12510 Elbow 1 15506-
20 07002-11423 O-ring 6 15506-
21 02896-11008 O-ring 4 15506-
22 02896-11009 O-ring 1 15506-
23 07040-11007 Plug 2 15506-
24 07002-11023 O-ring 2 15506-

Reference:K1110-045022 Page:K017024
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000773

Reference:K1110-045023 Page:K017025

PC78US-8 S/N 15001-UP


Floor Frame, Plug (#15506-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25590 Grommet 1 15506-

Reference:K1110-045023 Page:K017025
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001536
2
3

5
6

Reference:K1110-045024 Page:K017026

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Footrest, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25120 Footrest 1 15506-
2 01010-81025 Bolt 2 15506-
3 01643-31032 Washer 2 15506-
4 22P-53-13210 Plate 1 15506-
5 01010-81020 Bolt 2 15506-
6 01643-31032 Washer 2 15506-

Reference:K1110-045024 Page:K017026
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
@@5X114@
12
18

16
17
15
13
11

14

17 2
15
3
4

5
7

10
9
8

Reference:K1110-045025 Page:K017027

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Blade (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-01270 Valve Assembly, PPC 1 15872-
702-16-01600 Valve Assembly, PPC 1 15506-15871
1 C1 Body 1 15506-
2 C1 Valve 2 15506-
3 702-16-51140 Shim, T=0.30mm 2 15506-
702-16-54670 Shim, T=0.20mm 2 15506-
4 702-16-54550 Spring, L=22.73mm 2 15506-
5 702-16-54571 Retainer, T=5.9mm 2 15506-
6 702-16-54560 Spring 2 15872-
702-16-54160 Spring 2 15506-15871
7 702-16-53170 Piston 2 15506-
8 702-16-51270 Seal 2 15506-
9 702-16-54580 Collar 2 15506-
10 702-16-54590 O-ring 2 15506-
11 C1 Lever 1 15506-
12 C1 Plate 1 15506-
13 C1 Shaft 1 15506-
14 702-16-54641 Boot 1 15506-
15 01252-30625 Bolt 2 15872-
01252-60625 Bolt 2 15506-15871
16 702-16-54660 Plate 1 15506-
17 702-16-54650 Plate 2 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
18 702-16-54880 Filter 1 15506-

Reference:K1110-045025 Page:K017027
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA018048
11

12

7 6 24
8 23 21

10 9
1
20
2
19 25
17 22
18
20
21
14
13 24 25
23 22
16

15

27 26

4
5 3

Reference:K1110-045026 Page:K017028

PC78US-8 S/N 15001-UP


Floor Frame, Blade Control Lever (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-D1025 Bolt 2 15506-
2 01643-71032 Washer 2 15506-
3 22P-43-13310 Bracket 1 15506-
4 01010-81040 Bolt 2 15506-
5 01643-31032 Washer 2 15506-
6 22B-43-33181 Lever 1 28941-
A2 22B-43-33180 Lever 1 19769-28940
A2 22P-43-13330 Lever 1 15506-19768
7 01010-D0825 Bolt 2 15506-
8 01643-70823 Washer 2 15506-
9 01583-11408 Nut 1 15506-
10 22U-43-21730 Seat 1 15506-
11 20T-43-71110 Knob 1 15506-
12 20T-43-71190 Nut 1 15506-
13 21W-62-42370 Elbow 1 15506-
14 07000-12011 O-ring 1 15506-
15 21W-62-42370 Elbow 1 15506-
16 07000-12011 O-ring 1 15506-
17 11Y-62-12140 Nipple 2 15506-
18 07000-12011 O-ring 2 15506-
19 02896-11008 O-ring 2 15506-
20 02760-00215 Hose, Face Seal Type, Red 1 15506-
21 21W-62-53360 Hose 1 15506-
22 20Y-62-22850 Band, Green 2 15506-
23 20Y-62-22830 Band, White 2 15506-
24 20Y-62-22820 Band, Blue 2 15506-
25 20Y-62-22790 Band, Red 2 15506-
26 22B-43-23580 Sheet 1 15506-
27 22B-54-16461 Rivet 2 15506-

Reference:K1110-045026 Page:K017028
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, With Blade, AM-FM Radio, EU, Overload Alarm
FIG. Name FIG. No.
Floor Frame, Floor, Frame K1110-046001
Floor Frame, PPC Valve for Travel K1110-046002
Floor Frame, Travel Lever and Travel Pedal K1110-046003
Floor Frame, Floor, Footrest, L.H. K1110-046004
Floor Frame, Floor, Base K1110-046005
Floor Frame, Wiring Harness K1110-046006
Floor Frame, Electric Parts K1110-046007
Floor Frame, Wiring Harness Clamp, Floor Frame K1110-046008
Floor Frame, Work Equipment Lever L.H. K1110-046009
Floor Frame, PPC Valve for Work Equipment, L.H. K1110-046010
Floor Frame, Console Box, L.H. (#15506-16168) K1110-046011
Floor Frame, Console Box, L.H. (#16169-) K1110-046011A
Floor Frame, Radio (#15506-28942) K1110-046012
Floor Frame, Radio (#28943-) K1110-046012A
Floor Frame, Work Equipment Lock Lever K1110-046013
Floor Frame, Work Equipment Control Lever, R.H. K1110-046014
Floor Frame, PPC Valve for Work Equipment, R.H. K1110-046015
Floor Frame, Console Box, R.H. K1110-046016
Floor Frame, Starting Switch and Switch K1110-046017
Floor Frame, Air Conditioner Unit K1110-046018
Floor Frame, Air Conditioner Piping K1110-046019
Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping K1110-046020
Floor Frame, PPC Valve Piping Clamp K1110-046021
Floor Frame, P-Block and T-Block K1110-046022
Floor Frame, Plug K1110-046023
Floor Frame, Floor, Footrest, R.H. K1110-046024
Floor Frame, PPC Valve for Blade K1110-046025
Floor Frame, Blade Control Lever K1110-046026

Reference:X22-1095500 Page:K018000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001565
6
3
5 7
4

2
10
11
12
11 13
12
13

Reference:K1110-046001 Page:K018001

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Frame (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-53-13111 Floor 1 15506-
2 22P-53-13121 Plate 1 15506-
3 01010-81016 Bolt 2 15506-
4 01643-31032 Washer 2 15506-
5 22P-53-13130 Plate 1 15506-
6 01010-81016 Bolt 2 15506-
7 01643-31032 Washer 2 15506-
8 07286-03833 Hose 1 15506-
9 07280-04726 Clamp 1 15506-
10 22U-54-25581 Grommet 1 15506-
11 01010-81020 Bolt 4 15506-
12 01643-31032 Washer 4 15506-
13 01643-31032 Washer 4 15506-

Reference:K1110-046001 Page:K018001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY010653
25

23

31
29
30
2 28
3 27
4
6
5
7 26
9 23
8
31
29
30
28
27

18

24
11
19
13
10
22
21
11
12 20
19 18
15
14 17
16
19
20

12
21
22

Reference:K1110-046002 Page:K018002

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Travel (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-04271 Valve Assembly, PPC 1 21285-
702-16-04270 Valve Assembly, PPC 1 15001-21284
1 C1 Valve Body 1 15001-
2 C1 Valve 4 21285-
C1 Valve 4 15001-21284
3 702-16-51140 Shim, T=0.30mm 4 15001-
4 702-16-53420 Spring 4 15001-
5 702-16-53140 Retainer 4 15001-
6 702-16-54420 Spring 4 15001-
7 702-16-53170 Piston 4 15001-
8 702-16-71150 Seal 4 15001-
9 702-16-71160 Seat 4 15001-
10 C1 Case 1 15001-
11 C1 Lever 2 15001-
12 C1 Shaft 2 15001-
13 702-16-73640 Plate 1 15001-
14 01010-80855 Bolt 2 15001-
15 01643-30823 Washer 2 15001-
16 01010-80820 Bolt 4 21285-
01010-80816 Bolt 4 15001-21284
17 702-16-54331 Washer, T=1.60mm 4 15001-
702-16-54341 Washer, T=1.30mm 4 15001-
702-16-54351 Washer, T=1.00mm 4 15001-
702-16-56380 Washer, T=1.90mm 4 15001-
702-16-56390 Washer, T=2.20mm 4 15001-
18 C1 Pin, Spring 2 15001-
19 C1 Bushing 4 15001-
20 C1 O-ring 2 15001-
21 702-16-73610 Damper Assembly 2 15001-
22 01023-10306 Screw 4 15001-
Reference:K1110-046002 Page:K018002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, PPC Valve for Travel (#15001-)
Index Code Part Number Description Qty Serial No.
23 C1 Pin 2 15001-
24 04022-04016 Pin, Dowel 2 15001-
25 C1 Plug 2 15001-
26 C1 Plug 2 15001-
27 07040-11209 Plug 3 15001-
28 07002-11223 O-ring 3 15001-
29 C1 Ball 3 15001-
30 C1 Plug 3 15001-
31 C1 Seat 3 15001-

Reference:K1110-046002 Page:K018002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000753
19 20
11
12
18
10 17

16
13
5 17
14
6
3
4 15

10
8 12
11
9 21
27
22 7 28
1
23
14
2 13

25
24
30 26
29
30
30
29 33
30 34
31 30
34 29
30
32
34

Reference:K1110-046003 Page:K018003

PC78US-8 S/N 15001-UP


Floor Frame, Travel Lever and Travel Pedal (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-81020 Bolt 2 15506-
2 01643-31032 Washer 2 15506-
3 20Y-43-41361 Collar 4 15506-
4 20Y-43-41121 Cover 1 15506-
5 01010-81020 Bolt 4 15506-
6 01643-31032 Washer 4 15506-
7 203-43-51620 Spring 2 15506-
22U-43-21350 Cover Assembly 2 15506-
8 C1 Cover 1 15506-
9 22U-43-21360 Seal 1 15506-
10 20Y-43-41111 Lever 2 15506-
11 01010-D1045 Bolt 4 15506-
12 01643-71032 Washer 4 15506-
13 01010-81030 Bolt 4 15506-
14 01643-31032 Washer 4 15506-
15 22U-43-21111 Pedal 1 15506-
16 22U-43-21121 Pedal 1 15506-
17 21W-43-41441 Lever 2 15506-
18 20Y-43-21231 Knob 1 15506-
19 20Y-43-21241 Knob 1 15506-
20 01023-20416 Screw 2 15506-
21 7861-93-1840 Sensor, Pressure 1 15506-
07000-12011 O-ring 1 15506-
22 20Y-62-18910 Plug 1 15506-
23 07000-12018 O-ring 2 15506-
24 02781-00210 Union 1 15506-
25 07002-11423 O-ring 1 15506-
26 02896-11008 O-ring 1 15506-
27 22P-62-15270 Nipple 1 15506-
28 07002-11423 O-ring 1 15506-
Reference:K1110-046003 Page:K018003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Travel Lever and Travel Pedal (#15506-)
Index Code Part Number Description Qty Serial No.
29 21W-62-44640 Joint 4 15506-
30 07000-12015 O-ring 8 15506-
31 21W-62-44650 Union 1 15506-
32 21W-62-44660 Union 2 15506-
33 21W-62-44670 Union 1 15506-
34 02896-11008 O-ring 4 15506-

Reference:K1110-046003 Page:K018003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000754
3
4
1

5
6
2

Reference:K1110-046004 Page:K018004

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Footrest, L.H. (#15506-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25110 Footrest 1 15506-
2 22P-43-13680 Plate 1 15506-
3 01010-81025 Bolt 2 15506-
4 01643-31032 Washer 2 15506-
5 01010-81020 Bolt 1 15506-
6 01643-31032 Washer 1 15506-

Reference:K1110-046004 Page:K018004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000755
12

6 5
14
4
13

14 16
8 15
13 17

2 10
18
3
11
9

Reference:K1110-046005 Page:K018005

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Base (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-43-13442 Bracket 1 15506-
2 01010-D1235 Bolt 6 15506-
3 01643-71232 Washer 6 15506-
4 22M-43-21220 Adjuster 1 15506-
5 01252-80816 Bolt 3 15506-
6 22M-43-21230 Adjuster 1 15506-
7 01252-80816 Bolt 3 15506-
8 22P-43-13371 Pipe 1 15506-
9 22P-43-13351 Stopper 1 15506-
10 01010-D1020 Bolt 2 15506-
11 01643-71032 Washer 2 15506-
12 22P-43-13461 Frame 1 15506-
13 01252-80825 Bolt 6 15506-
14 01643-80823 Washer 6 15506-
15 21W-43-56130 Cover 1 15703-
22B-43-23461 Cover 1 15506-15702
16 01010-81020 Bolt 2 15506-
17 01643-31032 Washer 2 15506-
18 22B-43-23590 Trim 1 15506-

Reference:K1110-046005 Page:K018005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA009670
5 3
24 6 5
1 25 5 2
3 4
26 5
2 6
6 5
6 3
5

14

15 28
17 27
16
30
20
29
19
18

8 9

7
12 13
8 9

8 9
10 11
1

32
21
23 31
22

Reference:K1110-046006 Page:K018006

PC78US-8 S/N 15001-UP


Floor Frame, Wiring Harness (#15506-)
Index Code Part Number Description Qty Serial No.
1 21W-06-51114 Wiring Harness 1 15872-
21W-06-51113 Wiring Harness 1 15506-15871
2 08041-03000 Fuse, 30Amp. 2 15506-
3 08041-02000 Fuse, 20Amp. 3 15506-
4 08041-01500 Fuse, 15Amp. 1 15506-
5 08041-01000 Fuse, 10Amp. 9 15506-
6 08041-00500 Fuse, 5Amp. 5 15506-
7 20T-06-81230 Fusible Link, 45Amp. 2 15506-
8 HM6440-0129 F-Connector, Pink 5 15506-
9 HM6440-0128 M-Connector, Pink 5 15506-
10 HM6400-0013 F-Connector, Green 1 15506-
11 HM6409-0072 M-Connector, Green 1 15506-
12 HM6400-0012 F-Connector, Black 1 15506-
13 HM6409-0071 M-Connector, Black 1 15506-
14 22P-06-11840 Bracket 1 15506-
15 600-815-2170 Switch, Heater, Ribbon Heater Relay 1 15506-
16 01010-80616 Bolt 2 15506-
17 01643-30623 Washer 2 15506-
18 01010-80816 Bolt 2 15506-
19 01643-30823 Washer 2 15506-
20 04434-50610 Clip 1 15506-
21 04434-51910 Clip 1 15506-
22 01010-81020 Bolt 1 15506-
23 01643-31032 Washer 1 15506-
24 08038-02027 Cap 1 15506-
25 08038-04030 Cap 1 15506-
26 08038-00519 Cap 1 15506-
27 01010-81020 Bolt 3 15506-
28 01643-31032 Washer 3 15506-
29 01010-80816 Bolt 1 15506-
Reference:K1110-046006 Page:K018006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Wiring Harness (#15506-)
Index Code Part Number Description Qty Serial No.
30 01643-30823 Washer 1 15506-
31 22B-54-23221 Grommet 1 15506-
32 08034-20536 Band 1 15506-

Reference:K1110-046006 Page:K018006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000757
3
4

2 1

16
6
7
17
5
17
21 22
23
25
23 24 8
22 21
21

19
20 11
18
15

10

14
13
14 13
12 12

Reference:K1110-046007 Page:K018007

PC78US-8 S/N 15001-UP


Floor Frame, Electric Parts (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-06-11432 Bracket 1 19304-
A2 22P-06-11431 Bracket 1 15506-19303
2 7835-46-7002 Controller 1 15872-
7835-46-7001 Controller 1 15506-15871
3 01010-80820 Bolt 4 15506-
4 01643-30823 Washer 4 15506-
5 7861-94-3000 Resistor 1 15506-
6 01010-80816 Bolt 2 15506-
7 01643-30823 Washer 2 15506-
8 22B-06-21430 Wiring Harness 1 15506-
9 208-43-71420 Cap 2 15506-
10 08211-01920 Clip 1 15506-
11 08211-01020 Clip 1 15506-
12 04434-52711 Clip 2 15506-
13 01010-80816 Bolt 2 15506-
14 01643-30823 Washer 2 15506-
15 01023-10620 Screw 2 15506-
16 22P-06-11370 Sheet 1 15506-
17 22U-43-23290 Clip 3 15506-
18 04434-51908 Clip 1 15506-
19 01010-80816 Bolt 1 15506-
20 01643-30823 Washer 1 15506-
21 7861-74-5100 Relay 7 15506-
22 01010-80612 Bolt 8 15506-
23 01643-30623 Washer 8 15506-
24 8233-06-3350 Diode 3 15506-
25 421-07-31270 Relay 2 15506-

Reference:K1110-046007 Page:K018007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001477

12 2
11 7
14 8
13 18 22 15
26
21
28
23 4
27 17 3
18
16
25 10
20 6
24 9
21 19 5

Reference:K1110-046008 Page:K018008

PC78US-8 S/N 15001-UP


Floor Frame, Wiring Harness Clamp, Floor Frame (#15506-)
Index Code Part Number Description Qty Serial No.
1 08211-01520 Clip 1 15506-
2 04434-53411 Clip 1 15506-
3 01010-81025 Bolt 1 15506-
4 01643-31032 Washer 1 15506-
5 01010-80816 Bolt 2 15506-
6 01643-30823 Washer 2 15506-
7 04434-52711 Clip 1 15506-
8 07095-20420 Cushion 1 15506-
9 01010-81020 Bolt 1 15506-
10 01643-31032 Washer 1 15506-
11 155-61-15350 Clip 1 15506-
12 22M-62-13660 Cushion 1 15506-
13 01010-81020 Bolt 1 15506-
14 01643-31032 Washer 1 15506-
15 04434-53411 Clip 1 15506-
16 01010-81020 Bolt 1 15506-
17 01643-31032 Washer 1 15506-
18 04434-53411 Clip 2 15506-
19 01010-81020 Bolt 2 15506-
20 01643-31032 Washer 2 15506-
21 08211-00720 Clip 2 15506-
22 08211-01020 Clip 1 15506-
23 04434-51010 Clip 1 15506-
24 01010-81020 Bolt 1 15506-
25 01643-31032 Washer 1 15506-
26 08193-20010 Clip 1 15506-
27 01010-81020 Bolt 1 15506-
28 01643-31032 Washer 1 15506-

Reference:K1110-046008 Page:K018008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001494

9
1 8
5

Reference:K1110-046009 Page:K018009

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Lever L.H. (#15506-)
Index Code Part Number Description Qty Serial No.
20Y-43-22611 Lever Assembly 1 15506-
1 20Y-43-22211 Lever 1 15506-
20Y-43-22621 Knob 1 15506-
2 20Y-43-22630 Knob 1 15506-
3 20Y-43-22421 Insert 1 15506-
4 20Y-43-22250 Plate 1 15506-
5 20Y-43-22261 Boot 1 15506-
6 20Y-43-22370 Boot 1 15506-
7 600-411-1280 Nut 1 15506-
8 01252-41025 Bolt 1 15506-
9 01643-51032 Washer 1 15506-

Reference:K1110-046009 Page:K018009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011336
19

13

18

16
17

15

14

11
11 12

12
10
10 7
7
8
9
6
6 5
5
4
4
1

2
3

Reference:K1110-046010 Page:K018010

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Work Equipment, L.H. (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-04510 Valve, Pilot 1 15506-
1 C1 Body, Valve 1 15506-
2 C1 Plug 2 15506-
3 C1 Plug 2 15506-
4 C1 Valve 4 15506-
5 702-16-51140 Shim, T=0.30mm 4 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
6 702-16-71350 Spring 4 15506-
7 702-16-53140 Retainer 4 15506-
8 702-16-53470 Spring 2 15506-
9 702-16-53590 Spring 2 15506-
10 702-16-53170 Piston 4 15506-
11 702-16-71150 Seal 4 15506-
12 702-16-71160 Seat 4 15506-
13 702-16-71280 Boot 1 15506-
14 702-16-71141 Plate 1 15506-
15 702-16-71131 Plate 1 15506-
16 01010-80620 Bolt 4 15506-
17 702-16-51240 Joint, Universal 1 15506-
18 702-16-71361 Disc 1 15506-
19 702-16-71441 Nut 1 15506-

Reference:K1110-046010 Page:K018010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000762

5 37
4 3 36
6 39
27
29 1 38
20 2 8
7
20 17 4 56
9
20 40
13 52
41 51 54 53
21 13 26
42
28 19
29 18 43 33

34 13
15
35 16
25
22 24 10
23 14 57

12 57
11 33
50
49
33
30
33
45
31 46
32 50 44

55
50
48
47

Reference:K1110-046011 Page:K018011

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, L.H. (#15506-16168)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15506-@
2 01643-30823 Washer 4 15506-@
3 20Y-62-18910 Plug 1 15506-@
4 07000-12018 O-ring 2 15506-@
5 20Y-62-18890 Bolt, Joint 1 15506-@
6 07000-12015 O-ring 2 15506-@
7 02781-0021D Union 4 15506-@
8 07002-11423 O-ring 4 15506-@
9 02896-11008 O-ring 4 15506-@
10 22B-43-23112 Frame 1 15506-@
11 01010-D1030 Bolt 4 15506-@
12 01643-71032 Washer 4 15506-@
13 06124-01616 Bearing 4 15506-@
14 22B-43-23721 Bracket 1 15506-@
15 22B-43-23161 Shaft 1 15506-@
16 01435-00612 Bolt 1 15506-@
17 22B-43-23471 Spring 1 15506-@
18 04050-12015 Pin, Cotter 1 15506-@
19 01640-20816 Washer 1 15506-@
20 426-925-3981 Washer 3 15506-@
21 22B-43-23142 Guide 1 15506-@
22 04205-30832 Pin 2 15506-@
23 21U-43-32430 Collar 2 15506-@
24 04050-12015 Pin, Cotter 2 15506-@
25 01640-20816 Washer 2 15506-@
26 21U-43-32380 Spring, Gas 1 15506-@
27 04050-12015 Pin, Cotter 1 15506-@
28 04050-13015 Pin, Cotter 1 15506-@
29 01640-20816 Washer 2 15506-@
30 22B-06-21420 Switch, Work Equipment Lock 1 15506-@
Reference:K1110-046011 Page:K018011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, L.H. (#15506-16168)
Index Code Part Number Description Qty Serial No.
31 22U-06-22490 Plate 1 15506-@
32 01023-60320 Screw 2 15506-@
33 08059-00310 Clip 4 15506-16168
34 20Y-54-11611 Stopper 1 15506-@
35 01580-11008 Nut 1 15506-@
36 208-06-19170 Clip 1 15506-@
37 04434-51410 Clip 1 15506-@
38 01010-81025 Bolt 1 15506-@
39 01643-31032 Washer 1 15506-@
40 22B-43-23213 Cover 1 15506-@
41 01010-80616 Bolt 4 15506-@
42 01643-30623 Washer 4 15506-@
43 20Y-43-41290 Collar 4 15506-@
44 22B-43-23221 Cover 1 15506-@
45 01245-00616 Screw 2 15506-@
46 01643-70623 Washer 2 15506-@
47 01010-80616 Bolt 1 15506-@
48 01643-30623 Washer 1 15506-@
49 01435-00616 Bolt 4 15506-@
50 20Y-43-41290 Collar 7 15506-@
51 22B-43-23231 Cover 1 15506-@
52 01245-00616 Screw 2 15506-@
53 01643-70623 Washer 2 15506-@
54 20Y-43-41290 Collar 2 15506-@
55 22B-43-23271 Cover 1 15506-@
56 08059-00515 Clip 1 15506-16168
57 22B-43-23280 Seal 2 15506-@

Reference:K1110-046011 Page:K018011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006698

5 37
4 3 36
6 39
27
29 1 38
20 2 8
7
20 17 4
9 56
20
40
13 52
41 51 54 53
21 13 26
42
28 19
29 18 43 56

34 13
15
35 16
25
22 24 10
23 14 57

12 57
11
33
50
49
33
30
33
45
31 46
32 50 44

55
50
48
47

Reference:K1110-046011A Page:K018012

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, L.H. (#16169-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15506-
2 01643-30823 Washer 4 15506-
3 20Y-62-18910 Plug 1 15506-
4 07000-12018 O-ring 2 15506-
5 20Y-62-18890 Bolt, Joint 1 15506-
6 07000-12015 O-ring 2 15506-
7 02781-0021D Union 4 15506-
8 07002-11423 O-ring 4 15506-
9 02896-11008 O-ring 4 15506-
10 22B-43-23112 Frame 1 15506-
11 01010-D1030 Bolt 4 15506-
12 01643-71032 Washer 4 15506-
13 06124-01616 Bearing 4 15506-
14 22B-43-23722 Bracket 1 19440-
A2 22B-43-23721 Bracket 1 15506-19439
15 22B-43-23161 Shaft 1 15506-
16 01435-00612 Bolt 1 15506-
17 22B-43-23471 Spring 1 15506-
18 04050-12015 Pin, Cotter 1 15506-
19 01640-20816 Washer 1 15506-
20 426-925-3981 Washer 3 15506-
21 22B-43-23143 Guide 1 19440-
A2 22B-43-23142 Guide 1 15506-19439
22 04205-30835 Pin 2 15506-
23 21U-43-32430 Collar 2 15506-
24 04050-12015 Pin, Cotter 2 15506-
25 01640-20816 Washer 2 15506-
26 21U-43-32380 Spring, Gas 1 15506-
27 04050-12015 Pin, Cotter 1 15506-
28 04050-13015 Pin, Cotter 1 15506-
Reference:K1110-046011A Page:K018012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, L.H. (#16169-)
Index Code Part Number Description Qty Serial No.
29 01640-20816 Washer 2 15506-
30 22B-06-21420 Switch, Work Equipment Lock 1 15506-
31 22U-06-22490 Plate 1 15506-
32 01023-60320 Screw 2 15506-
33 08059-00310 Clip 3 16169-
34 20Y-54-11611 Stopper 1 15506-
35 01580-11008 Nut 1 15506-
36 208-06-19170 Clip 1 15506-
37 04434-51410 Clip 1 15506-28942
38 01010-81025 Bolt 1 15506-
39 01643-31032 Washer 1 15506-
40 22B-43-23213 Cover 1 15506-
41 01010-80616 Bolt 4 15506-
42 01643-30623 Washer 4 15506-
43 20Y-43-41290 Collar 4 15506-
44 22B-43-23221 Cover 1 15506-
45 01245-00616 Screw 2 15506-
46 01643-70623 Washer 2 15506-
47 01010-80616 Bolt 1 15506-
48 01643-30623 Washer 1 15506-
49 01435-00616 Bolt 4 15506-
50 20Y-43-41290 Collar 7 15506-
51 22B-43-23231 Cover 1 15506-
52 01245-00616 Screw 2 15506-
53 01643-70623 Washer 2 15506-
54 20Y-43-41290 Collar 2 15506-
55 22B-43-23271 Cover 1 15506-
56 08059-00515 Clip 2 16169-
57 22B-43-23280 Seal 2 15506-

Reference:K1110-046011A Page:K018012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001502
4 3
16
5
1 2
13
10 15
4
5 11
17
2 9
3

14
8
6 7
14

12

Reference:K1110-046012 Page:K018013

PC78US-8 S/N 15001-UP


Floor Frame, Radio (#15506-28942)
Index Code Part Number Description Qty Serial No.
1 2A5-06-11932 Radio 1 28943-@
A2 20Y-06-42430 Radio 1 15893-28942
A2 20Y-06-41238 Radio 1 15506-15892
2 20Y-43-41482 Plate 2 15506-@
3 01023-60510 Screw 6 15506-@
4 01010-80616 Bolt 4 15506-@
5 01643-30623 Washer 4 15506-@
6 22B-43-23171 Bracket 1 15506-@
7 01010-80616 Bolt 2 15506-@
8 01643-30623 Washer 2 15506-@
9 22B-43-23181 Bracket 1 15506-@
10 01010-80616 Bolt 2 15506-@
11 01643-30623 Washer 2 15506-@
12 21W-06-61170 Wiring Harness 1 28943-@
A2 21W-06-51271 Wiring Harness 1 16169-28942
A2 21W-06-51270 Wiring Harness 1 15506-16168
13 08034-20414 Band, Black 2 15506-28942
14 08034-20519 Band 2 15506-28942
15 22B-54-28990 Sheet 1 15506-@
16 20Y-06-41830 Wiring Harness 1 15506-28942
17 08912-51600 Cord 1 15506-28942

Reference:K1110-046012 Page:K018013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014576
4
3
5
1 2

10 13
4
11
5
9
2 15 14
3
13
12 16
6
12

15
13

8 13
7

Reference:K1110-046012A Page:K018014

PC78US-8 S/N 15001-UP


Floor Frame, Radio (#28943-)
Index Code Part Number Description Qty Serial No.
1 2A5-06-11932 Radio 1 28943-
2 20Y-43-41482 Plate 2 15506-
3 01023-60510 Screw 6 15506-
4 01010-80616 Bolt 4 15506-
5 01643-30623 Washer 4 15506-
6 22B-43-23171 Bracket 1 15506-
7 01010-80616 Bolt 2 15506-
8 01643-30623 Washer 2 15506-
9 22B-43-23181 Bracket 1 15506-
10 01010-80616 Bolt 2 15506-
11 01643-30623 Washer 2 15506-
12 21W-06-61170 Wiring Harness 1 28943-
13 08034-20519 Band 4 28943-
14 22B-54-28990 Sheet 1 15506-
15 566-07-12151 Cable 1 28943-
16 04434-51410 Clip 1 28943-

Reference:K1110-046012A Page:K018014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000764

2 1

Reference:K1110-046013 Page:K018015

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Lock Lever (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-43-13111 Lever 1 15506-
2 22U-43-22490 Knob 1 15506-
3 20T-43-71280 Pin 1 15506-

Reference:K1110-046013 Page:K018015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA022737
3

7
4

10
11
1
12

Reference:K1110-046014 Page:K018016

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Control Lever, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
22U-43-21172 Lever Assembly 1 15506-
1 20Y-43-22221 Lever 1 15506-
22U-43-21192 Knob 1 15506-
2 C1 Screw 1 15506-
3 20Y-43-22390 Knob 1 15506-
4 20Y-43-22421 Insert 1 15506-
5 22U-43-21211 Switch 1 15506-
6 20Y-43-22250 Plate 1 15506-
7 20Y-43-22261 Boot 1 15506-
8 20Y-43-22370 Boot 1 15506-
9 600-411-1280 Nut 1 15506-
10 01252-41025 Bolt 1 15506-
11 01643-51032 Washer 1 15506-
12 08034-40521 Band 1 15506-

Reference:K1110-046014 Page:K018016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011336
19

13

18

16
17

15

14

11
11 12

12
10
10 7
7
8
9
6
6 5
5
4
4
1

2
3

Reference:K1110-046015 Page:K018017

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Work Equipment, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-04510 Valve, Pilot 1 15506-
1 C1 Body, Valve 1 15506-
2 C1 Plug 2 15506-
3 C1 Plug 2 15506-
4 C1 Valve 4 15506-
5 702-16-51140 Shim, T=0.30mm 4 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
6 702-16-71350 Spring 4 15506-
7 702-16-53140 Retainer 4 15506-
8 702-16-53470 Spring 2 15506-
9 702-16-53590 Spring 2 15506-
10 702-16-53170 Piston 4 15506-
11 702-16-71150 Seal 4 15506-
12 702-16-71160 Seat 4 15506-
13 702-16-71280 Boot 1 15506-
14 702-16-71141 Plate 1 15506-
15 702-16-71131 Plate 1 15506-
16 01010-80620 Bolt 4 15506-
17 702-16-51240 Joint, Universal 1 15506-
18 702-16-71361 Disc 1 15506-
19 702-16-71441 Nut 1 15506-

Reference:K1110-046015 Page:K018017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001508
1
2
34
5 35
4 3
6
4 36
8

7
6
9
16
33
17
18

26
16
17
18 10
15
27
29 28
31
30

11
12
24
25
32

37 14
13

25
23
22

19
25
21
20

Reference:K1110-046016 Page:K018018

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15506-
2 01643-30823 Washer 4 15506-
3 20Y-62-18910 Plug 1 15506-
4 07000-12018 O-ring 2 15506-
5 20Y-62-18890 Bolt, Joint 1 15506-
6 07000-12015 O-ring 2 15506-
7 02781-0021D Union 4 15506-
8 07002-11423 O-ring 4 15506-
9 02896-11008 O-ring 4 15506-
10 22P-43-13261 Frame 1 15506-
11 01010-D1230 Bolt 4 15506-
12 01643-71232 Washer 4 15506-
13 22U-43-23251 Sheet 1 15506-
14 22U-43-23290 Clip 2 15506-
15 20Y-43-41324 Cover 1 18212-
20Y-43-41323 Cover 1 15506-18211
16 01010-80616 Bolt 4 15506-
17 01643-30623 Washer 4 15506-
18 20Y-43-41290 Collar 4 15506-
19 22P-43-13240 Cover 1 15506-
20 01245-00616 Screw 2 15506-
21 01643-70623 Washer 2 15506-
22 01010-80616 Bolt 1 15506-
23 01643-30623 Washer 1 15506-
24 01435-00616 Bolt 2 15506-
25 20Y-43-41290 Collar 5 15506-
26 22B-43-23251 Cover 1 15506-
27 01245-00616 Screw 2 15506-
28 01643-70623 Washer 2 15506-
29 20Y-43-41290 Collar 2 15506-
Reference:K1110-046016 Page:K018018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
30 01245-00616 Screw 3 15506-
31 01643-70623 Washer 3 15506-
32 09415-02512 Cap 1 15506-
33 208-06-19170 Clip 1 15506-
34 01010-81030 Bolt 1 15506-
35 01643-31032 Washer 1 15506-
36 103-21-21260 Boss 1 15506-
37 21W-43-51130 Seal 1 15506-

Reference:K1110-046016 Page:K018018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001540
9
8

12

6 12
10
5
2
13
3 14
4

11

Reference:K1110-046017 Page:K018019

PC78US-8 S/N 15001-UP


Floor Frame, Starting Switch and Switch (#15001-)
Index Code Part Number Description Qty Serial No.
1 08086-20000 Switch, Starting 1 15001-
2 20Y-43-41740 Plate 1 15001-
3 20Y-43-41750 Washer 3 15001-
4 20Y-43-41790 Washer 1 15001-
5 22U-06-22380 Potentiometer 1 15001-
6 22U-06-22460 Spring 1 15001-
7 20Y-43-41781 Knob 1 18494-
20Y-43-41780 Knob 1 15001-18493
8 20Y-06-42450 Switch, Lamp 1 28942-
A2 20Y-06-42121 Switch, Lamp 1 15001-28941
9 20Y-06-42190 Cover 4 15001-
10 21W-06-51340 Wiring Harness 1 15506-
11 22U-43-23260 Clip 1 15001-
12 04434-51710 Clip 2 15001-
13 01010-81016 Bolt 2 15001-
14 01643-31032 Washer 2 15001-

Reference:K1110-046017 Page:K018019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000768
3

35

36 49
38
19
50 40 48
39 39
34 45
41 43
47
42 26 34
39
46 20
43
34 5 11
52
42 33 7
26 34 13
44
30 10

34 2

21 6 9 8

12 14
37 28
29 15
22
34 16

27
4
27

1 17
24

23
29

25 31

32 51
34
19
18

Reference:K1110-046018 Page:K018020

PC78US-8 S/N 15001-UP


Floor Frame, Air Conditioner Unit (#15506-)
Index Code Part Number Description Qty Serial No.
22B-979-2703 Air Conditioner Assembly 1 28941-
A2 22B-979-2702 Air Conditioner Assembly 1 20782-28940
A2 22B-979-2701 Air Conditioner Assembly 1 15506-20781
1 ND245450-6630 Case 1 15506-
2 ND245450-6640 Case 1 15506-
3 ND245450-6650 Case 1 15506-
4 ND116576-8040 Plate 1 15506-
ND446010-4660 Evaporator Assembly 1 15506-
5 ND446600-1472 Evaporator 1 15506-
6 ND949142-0020 O-ring 1 15506-
7 ND949142-0030 O-ring 1 15506-
8 ND446250-5990 Tube 1 15506-
9 ND447500-2980 Valve 1 19806-
A2 ND447500-2660 Valve 1 15506-19805
10 ND949046-3100 Bolt 1 15506-
11 ND146687-2091 Packing 1 15506-
12 ND146687-2080 Packing 1 15506-
13 ND146687-6350 Packing 1 15506-
14 ND146657-8850 Packing 1 15506-
15 ND949046-3610 Bolt 2 15506-
16 ND445021-3091 Plug 1 28941-
ND445021-3941 Plug 1 15506-28940
17 ND116420-6830 Heater 1 15506-
18 ND116340-8820 Motor Assembly 1 15506-
19 ND949008-0330 Screw, Tapping 4 15506-
20 ND077800-1130 Transistor 1 28941-
ND077800-1040 Transistor 1 15506-28940
21 ND077500-5890 Thermistor Assembly 1 15506-
22 ND246790-2060 Clamp 1 15506-
23 ND077500-0650 Thermistor 1 15506-
Reference:K1110-046018 Page:K018020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Air Conditioner Unit (#15506-)
Index Code Part Number Description Qty Serial No.
24 ND017661-3700 Clamp 1 15506-
25 ND063600-4580 Servo Motor Assembly 1 15506-
26 ND063800-0300 Servo Motor Assembly 2 15506-
27 ND116660-0600 Door 2 15506-
28 ND116740-2290 Door 1 28941-
ND116640-8051 Dumper 1 15506-28940
29 ND116650-9870 Door 2 15506-
30 ND017231-1400 Clamp 1 15506-
31 ND116682-0670 Lever 1 15506-
32 ND116662-8420 Shaft 1 15506-
33 ND017212-1720 Lock 1 15506-
34 ND949001-1730 Screw, Tapping 38 15506-
35 ND146687-6360 Packing 1 15506-
36 ND146687-6370 Packing 1 15506-
37 ND146687-6380 Packing 1 15506-
38 ND145530-1210 Filter, Recirculation Air 1 15506-
39 ND949008-0460 Screw, Tapping 3 15506-
40 ND116576-8050 Plate 1 15506-
41 ND116576-8060 Plate 1 15506-
42 ND116780-4690 Lever 2 15506-
43 ND116780-4700 Lever 2 15506-
44 ND116780-4710 Lever 1 15506-
45 ND116682-7310 Lever 1 15506-
46 ND116782-1370 Lever 1 15506-
47 ND116662-8430 Shaft 1 15506-
48 ND116662-8440 Shaft 1 15506-
49 ND246470-5634 Wiring Harness 1 28941-
ND246470-5631 Wiring Harness 1 15506-28940
50 ND246780-1370 Clamp 1 15506-
51 ND146687-6400 Packing 1 15506-
52 ND017780-3110 Cable 1 15506-

Reference:K1110-046018 Page:K018020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001513
8

9
10
11

1 7
4
2
3

5 6

17 16
20 14
13 15

12

21

17
15
22

20 23

21
16
18
14
19

Reference:K1110-046019 Page:K018021

PC78US-8 S/N 15001-UP


Floor Frame, Air Conditioner Piping (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-80825 Bolt 5 15506-
2 01643-30823 Washer 5 15506-
3 208-979-7540 Collar 5 15506-
4 22P-53-13141 Bracket 1 15506-
5 01010-D0616 Bolt 1 15506-
6 01643-70623 Washer 1 15506-
7 08211-01520 Clip 1 15506-
8 22B-979-2781 Duct 1 15506-
9 01010-80825 Bolt 2 15506-
10 01643-30823 Washer 2 15506-
11 208-979-7540 Collar 2 15506-
12 22P-979-1850 Hose 1 15506-
13 22P-979-1870 Hose 1 15506-
14 21W-979-5111 Hose 1 15506-
15 20Y-979-3150 O-ring 2 15506-
16 21W-979-5121 Hose 1 15506-
17 20Y-979-3130 O-ring 2 15506-
18 208-979-7650 Connector 1 15506-
19 01435-40620 Bolt 1 15506-
20 21W-979-5131 Hose 1 15506-
21 21W-979-5141 Hose 1 15506-
22 09479-02400 Clip 2 15506-
23 08034-20536 Band 1 15506-

Reference:K1110-046019 Page:K018021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001518
30 23 33
29
32
33
21 34 20
34
13 15 17
27 12
15
31 32 25 15 19
8
10 3
16
6
14
18
4

30
32
2 24

13 29
22 21 34
15 34 33 23 33
17
7 6 16
11
5 14 12
9
28 10 19
4 15
26 18
25 8
32 15
31
27

35

Reference:K1110-046020 Page:K018022

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-62-15151 Hose 1 15506-
2 22P-62-15371 Hose 1 15506-
3 22P-62-15202 Hose Assembly 1 21086-
A1 22P-62-15201 Hose Assembly 1 15506-21085
4 22P-62-15332 Hose 1 21086-
A1 22P-62-15331 Hose 1 15506-21085
5 20U-62-22190 O-ring 1 15506-
6 22P-62-15292 Hose 1 21086-
A1 22P-62-15291 Hose 1 15506-21085
7 20U-62-22190 O-ring 1 15506-
8 22P-62-15232 Hose 1 21086-
A1 22P-62-15231 Hose 1 15506-21085
9 20U-62-22190 O-ring 1 15506-
10 22P-62-15332 Hose 1 21086-
A1 22P-62-15331 Hose 1 15506-21085
11 20U-62-22190 O-ring 1 15506-
12 22P-62-15211 Hose 1 15506-
13 22P-62-15121 Hose 1 15506-
14 20Y-62-22860 Band, Brown 2 15506-
15 20Y-62-22850 Band, Green 6 15506-
16 20Y-62-22830 Band, White 2 15506-
17 20Y-62-22820 Band, Blue 2 15506-
18 21U-62-34740 Band, Orange 2 15506-
19 20Y-62-22790 Band, Red 2 15506-
20 22P-62-15102 Hose Assembly 1 21086-
A1 22P-62-15101 Hose Assembly 1 15506-21085
21 22P-62-15142 Hose 1 21086-
A1 22P-62-15141 Hose 1 15506-21085
22 20U-62-22190 O-ring 1 15506-
23 22P-62-15132 Hose 1 21086-
Reference:K1110-046020 Page:K018022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping (#15506-)
Index Code Part Number Description Qty Serial No.
23 A1 22P-62-15131 Hose 1 15506-21085
24 20U-62-22190 O-ring 1 15506-
25 22P-62-15142 Hose 1 21086-
A1 22P-62-15141 Hose 1 15506-21085
26 20U-62-22190 O-ring 1 15506-
27 22P-62-15282 Hose 1 21086-
A1 22P-62-15281 Hose 1 15506-21085
28 20U-62-22190 O-ring 1 15506-
29 22P-62-15111 Hose 1 15506-
30 22P-62-15191 Hose 1 15506-
31 20Y-62-22840 Band, Black 2 15506-
32 20Y-62-22820 Band, Blue 6 15506-
33 20Y-62-22810 Band, Yellow 4 15506-
34 20Y-62-22790 Band, Red 4 15506-
35 22P-62-15261 Hose 1 15506-

Reference:K1110-046020 Page:K018022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001542
1

13 14
17
15
16
18 2

4
18

7
4
3

4
10
6
7 7 5
10 12
11
9
8

Reference:K1110-046021 Page:K018023

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve Piping Clamp (#15506-)
Index Code Part Number Description Qty Serial No.
1 08034-20536 Band 3 15506-
2 134-03-61410 Band 2 15506-
3 21W-54-42291 Grommet 1 15506-
4 04434-53411 Clip 3 15506-
5 01010-81020 Bolt 3 15506-
6 01643-31032 Washer 3 15506-
7 04434-52711 Clip 3 15506-
8 01010-81020 Bolt 2 15506-
9 01643-31032 Washer 2 15506-
10 04434-52711 Clip 2 15506-
11 01010-81020 Bolt 2 15506-
12 01643-31032 Washer 2 15506-
13 22P-53-13151 Grommet 1 15506-
14 08034-20536 Band 1 15506-
15 208-06-19170 Clip 1 15506-
16 01010-81020 Bolt 1 15506-
17 01643-31032 Washer 1 15506-
18 04435-51510 Clip 2 15506-

Reference:K1110-046021 Page:K018023
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001557

9
21 8 5
18 8
7
8
8
20 6
16
20 23 1 9
24 8 4
7 8
9
22 20
15 10
21 11
19 3
20 11
20 2
17 8 10
21 4
12 20 9
24 15
23 21
14
13

Reference:K1110-046022 Page:K018024

PC78US-8 S/N 15001-UP


Floor Frame, P-Block and T-Block (#15506-)
Index Code Part Number Description Qty Serial No.
1 21W-62-42351 Block 1 15506-
2 01010-80845 Bolt 2 15506-
3 01643-30823 Washer 2 15506-
4 02781-0021D Union 2 15506-
5 11Y-62-12230 Union 1 15506-
6 07040-11409 Plug 1 15506-
7 02783-10210 Elbow 2 15506-
8 07002-11423 O-ring 6 15506-
9 02896-11008 O-ring 5 15506-
10 07040-11007 Plug 2 15506-
11 07002-11023 O-ring 2 15506-
12 21W-62-42351 Block 1 15506-
13 01010-80845 Bolt 2 15506-
14 01643-30823 Washer 2 15506-
15 02781-0021D Union 2 15506-
16 07040-11409 Plug 1 15506-
17 11Y-62-12230 Union 1 15506-
18 02782-10210 Elbow 1 15506-
19 11Y-62-12510 Elbow 1 15506-
20 07002-11423 O-ring 6 15506-
21 02896-11008 O-ring 4 15506-
22 02896-11009 O-ring 1 15506-
23 07040-11007 Plug 2 15506-
24 07002-11023 O-ring 2 15506-

Reference:K1110-046022 Page:K018024
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000773

Reference:K1110-046023 Page:K018025

PC78US-8 S/N 15001-UP


Floor Frame, Plug (#15506-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25590 Grommet 1 15506-

Reference:K1110-046023 Page:K018025
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001536
2
3

5
6

Reference:K1110-046024 Page:K018026

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Footrest, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25120 Footrest 1 15506-
2 01010-81025 Bolt 2 15506-
3 01643-31032 Washer 2 15506-
4 22P-53-13210 Plate 1 15506-
5 01010-81020 Bolt 2 15506-
6 01643-31032 Washer 2 15506-

Reference:K1110-046024 Page:K018026
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
@@5X114@
12
18

16
17
15
13
11

14

17 2
15
3
4

5
7

10
9
8

Reference:K1110-046025 Page:K018027

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Blade (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-01270 Valve Assembly, PPC 1 15872-
702-16-01600 Valve Assembly, PPC 1 15506-15871
1 C1 Body 1 15506-
2 C1 Valve 2 15506-
3 702-16-51140 Shim, T=0.30mm 2 15506-
702-16-54670 Shim, T=0.20mm 2 15506-
4 702-16-54550 Spring, L=22.73mm 2 15506-
5 702-16-54571 Retainer, T=5.9mm 2 15506-
6 702-16-54560 Spring 2 15872-
702-16-54160 Spring 2 15506-15871
7 702-16-53170 Piston 2 15506-
8 702-16-51270 Seal 2 15506-
9 702-16-54580 Collar 2 15506-
10 702-16-54590 O-ring 2 15506-
11 C1 Lever 1 15506-
12 C1 Plate 1 15506-
13 C1 Shaft 1 15506-
14 702-16-54641 Boot 1 15506-
15 01252-30625 Bolt 2 15872-
01252-60625 Bolt 2 15506-15871
16 702-16-54660 Plate 1 15506-
17 702-16-54650 Plate 2 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
18 702-16-54880 Filter 1 15506-

Reference:K1110-046025 Page:K018027
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA018048
11

12

7 6 24
8 23 21

10 9
1
20
2
19 25
17 22
18
20
21
14
13 24 25
23 22
16

15

27 26

4
5 3

Reference:K1110-046026 Page:K018028

PC78US-8 S/N 15001-UP


Floor Frame, Blade Control Lever (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-D1025 Bolt 2 15506-
2 01643-71032 Washer 2 15506-
3 22P-43-13310 Bracket 1 15506-
4 01010-81040 Bolt 2 15506-
5 01643-31032 Washer 2 15506-
6 22B-43-33181 Lever 1 28941-
A2 22B-43-33180 Lever 1 19769-28940
A2 22P-43-13330 Lever 1 15506-19768
7 01010-D0825 Bolt 2 15506-
8 01643-70823 Washer 2 15506-
9 01583-11408 Nut 1 15506-
10 22U-43-21730 Seat 1 15506-
11 20T-43-71110 Knob 1 15506-
12 20T-43-71190 Nut 1 15506-
13 21W-62-42370 Elbow 1 15506-
14 07000-12011 O-ring 1 15506-
15 21W-62-42370 Elbow 1 15506-
16 07000-12011 O-ring 1 15506-
17 11Y-62-12140 Nipple 2 15506-
18 07000-12011 O-ring 2 15506-
19 02896-11008 O-ring 2 15506-
20 02760-00215 Hose, Face Seal Type, Red 1 15506-
21 21W-62-53360 Hose 1 15506-
22 20Y-62-22850 Band, Green 2 15506-
23 20Y-62-22830 Band, White 2 15506-
24 20Y-62-22820 Band, Blue 2 15506-
25 20Y-62-22790 Band, Red 2 15506-
26 22B-43-23580 Sheet 1 15506-
27 22B-54-16461 Rivet 2 15506-

Reference:K1110-046026 Page:K018028
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, With Blade, AM-FM Radio, EU, 1-Additional Actuator Piping
FIG. Name FIG. No.
Floor Frame, Floor, Frame K1110-044001
Floor Frame, PPC Valve for Travel K1110-044002
Floor Frame, Travel Lever and Travel Pedal K1110-044003
Floor Frame, Floor, Footrest, L.H. K1110-044004
Floor Frame, Floor, Base K1110-044005
Floor Frame, Wiring Harness K1110-044006
Floor Frame, Electric Parts K1110-044007
Floor Frame, Wiring Harness Clamp, Floor Frame K1110-044008
Floor Frame, Work Equipment Lever L.H. K1110-044009
Floor Frame, PPC Valve for Work Equipment, L.H. K1110-044010
Floor Frame, Console Box, L.H. (#15506-16168) K1110-044011
Floor Frame, Console Box, L.H. (#16169-) K1110-044011A
Floor Frame, Radio (#15506-28942) K1110-044012
Floor Frame, Radio (#28943-) K1110-044012A
Floor Frame, Work Equipment Lock Lever K1110-044013
Floor Frame, Work Equipment Control Lever, R.H. K1110-044014
Floor Frame, PPC Valve for Work Equipment, R.H. K1110-044015
Floor Frame, Console Box, R.H. K1110-044016
Floor Frame, Starting Switch and Switch K1110-044017
Floor Frame, Air Conditioner Unit K1110-044018
Floor Frame, Air Conditioner Piping K1110-044019
Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping K1110-044020
Floor Frame, PPC Valve Piping Clamp K1110-044021
Floor Frame, P-Block and T-Block K1110-044022
Floor Frame, Plug K1110-044023
Floor Frame, PPC Valve for Swing and Attachment K1110-044024
Floor Frame, Work Equipment Offset Control Pedal K1110-044025
Floor Frame, PPC Valve for Blade K1110-044026
Floor Frame, Blade Control Lever K1110-044027

Reference:X22-1095460 Page:K019000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001565
6
3
5 7
4

2
10
11
12
11 13
12
13

Reference:K1110-044001 Page:K019001

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Frame (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-53-13111 Floor 1 15506-
2 22P-53-13121 Plate 1 15506-
3 01010-81016 Bolt 2 15506-
4 01643-31032 Washer 2 15506-
5 22P-53-13130 Plate 1 15506-
6 01010-81016 Bolt 2 15506-
7 01643-31032 Washer 2 15506-
8 07286-03833 Hose 1 15506-
9 07280-04726 Clamp 1 15506-
10 22U-54-25581 Grommet 1 15506-
11 01010-81020 Bolt 4 15506-
12 01643-31032 Washer 4 15506-
13 01643-31032 Washer 4 15506-

Reference:K1110-044001 Page:K019001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY010653
25

23

31
29
30
2 28
3 27
4
6
5
7 26
9 23
8
31
29
30
28
27

18

24
11
19
13
10
22
21
11
12 20
19 18
15
14 17
16
19
20

12
21
22

Reference:K1110-044002 Page:K019002

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Travel (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-04271 Valve Assembly, PPC 1 21285-
702-16-04270 Valve Assembly, PPC 1 15001-21284
1 C1 Valve Body 1 15001-
2 C1 Valve 4 21285-
C1 Valve 4 15001-21284
3 702-16-51140 Shim, T=0.30mm 4 15001-
4 702-16-53420 Spring 4 15001-
5 702-16-53140 Retainer 4 15001-
6 702-16-54420 Spring 4 15001-
7 702-16-53170 Piston 4 15001-
8 702-16-71150 Seal 4 15001-
9 702-16-71160 Seat 4 15001-
10 C1 Case 1 15001-
11 C1 Lever 2 15001-
12 C1 Shaft 2 15001-
13 702-16-73640 Plate 1 15001-
14 01010-80855 Bolt 2 15001-
15 01643-30823 Washer 2 15001-
16 01010-80820 Bolt 4 21285-
01010-80816 Bolt 4 15001-21284
17 702-16-54331 Washer, T=1.60mm 4 15001-
702-16-54341 Washer, T=1.30mm 4 15001-
702-16-54351 Washer, T=1.00mm 4 15001-
702-16-56380 Washer, T=1.90mm 4 15001-
702-16-56390 Washer, T=2.20mm 4 15001-
18 C1 Pin, Spring 2 15001-
19 C1 Bushing 4 15001-
20 C1 O-ring 2 15001-
21 702-16-73610 Damper Assembly 2 15001-
22 01023-10306 Screw 4 15001-
Reference:K1110-044002 Page:K019002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, PPC Valve for Travel (#15001-)
Index Code Part Number Description Qty Serial No.
23 C1 Pin 2 15001-
24 04022-04016 Pin, Dowel 2 15001-
25 C1 Plug 2 15001-
26 C1 Plug 2 15001-
27 07040-11209 Plug 3 15001-
28 07002-11223 O-ring 3 15001-
29 C1 Ball 3 15001-
30 C1 Plug 3 15001-
31 C1 Seat 3 15001-

Reference:K1110-044002 Page:K019002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000753
19 20
11
12
18
10 17

16
13
5 17
14
6
3
4 15

10
8 12
11
9 21
27
22 7 28
1
23
14
2 13

25
24
30 26
29
30
30
29 33
30 34
31 30
34 29
30
32
34

Reference:K1110-044003 Page:K019003

PC78US-8 S/N 15001-UP


Floor Frame, Travel Lever and Travel Pedal (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-81020 Bolt 2 15506-
2 01643-31032 Washer 2 15506-
3 20Y-43-41361 Collar 4 15506-
4 20Y-43-41121 Cover 1 15506-
5 01010-81020 Bolt 4 15506-
6 01643-31032 Washer 4 15506-
7 203-43-51620 Spring 2 15506-
22U-43-21350 Cover Assembly 2 15506-
8 C1 Cover 1 15506-
9 22U-43-21360 Seal 1 15506-
10 20Y-43-41111 Lever 2 15506-
11 01010-D1045 Bolt 4 15506-
12 01643-71032 Washer 4 15506-
13 01010-81030 Bolt 4 15506-
14 01643-31032 Washer 4 15506-
15 22U-43-21111 Pedal 1 15506-
16 22U-43-21121 Pedal 1 15506-
17 21W-43-41441 Lever 2 15506-
18 20Y-43-21231 Knob 1 15506-
19 20Y-43-21241 Knob 1 15506-
20 01023-20416 Screw 2 15506-
21 7861-93-1840 Sensor, Pressure 1 15506-
07000-12011 O-ring 1 15506-
22 20Y-62-18910 Plug 1 15506-
23 07000-12018 O-ring 2 15506-
24 02781-00210 Union 1 15506-
25 07002-11423 O-ring 1 15506-
26 02896-11008 O-ring 1 15506-
27 22P-62-15270 Nipple 1 15506-
28 07002-11423 O-ring 1 15506-
Reference:K1110-044003 Page:K019003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Travel Lever and Travel Pedal (#15506-)
Index Code Part Number Description Qty Serial No.
29 21W-62-44640 Joint 4 15506-
30 07000-12015 O-ring 8 15506-
31 21W-62-44650 Union 1 15506-
32 21W-62-44660 Union 2 15506-
33 21W-62-44670 Union 1 15506-
34 02896-11008 O-ring 4 15506-

Reference:K1110-044003 Page:K019003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000754
3
4
1

5
6
2

Reference:K1110-044004 Page:K019004

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Footrest, L.H. (#15506-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25110 Footrest 1 15506-
2 22P-43-13680 Plate 1 15506-
3 01010-81025 Bolt 2 15506-
4 01643-31032 Washer 2 15506-
5 01010-81020 Bolt 1 15506-
6 01643-31032 Washer 1 15506-

Reference:K1110-044004 Page:K019004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000755
12

6 5
14
4
13

14 16
8 15
13 17

2 10
18
3
11
9

Reference:K1110-044005 Page:K019005

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Base (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-43-13442 Bracket 1 15506-
2 01010-D1235 Bolt 6 15506-
3 01643-71232 Washer 6 15506-
4 22M-43-21220 Adjuster 1 15506-
5 01252-80816 Bolt 3 15506-
6 22M-43-21230 Adjuster 1 15506-
7 01252-80816 Bolt 3 15506-
8 22P-43-13371 Pipe 1 15506-
9 22P-43-13351 Stopper 1 15506-
10 01010-D1020 Bolt 2 15506-
11 01643-71032 Washer 2 15506-
12 22P-43-13461 Frame 1 15506-
13 01252-80825 Bolt 6 15506-
14 01643-80823 Washer 6 15506-
15 21W-43-56130 Cover 1 15703-
22B-43-23461 Cover 1 15506-15702
16 01010-81020 Bolt 2 15506-
17 01643-31032 Washer 2 15506-
18 22B-43-23590 Trim 1 15506-

Reference:K1110-044005 Page:K019005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA009670
5 3
24 6 5
1 25 5 2
3 4
26 5
2 6
6 5
6 3
5

14

15 28
17 27
16
30
20
29
19
18

8 9

7
12 13
8 9

8 9
10 11
1

32
21
23 31
22

Reference:K1110-044006 Page:K019006

PC78US-8 S/N 15001-UP


Floor Frame, Wiring Harness (#15506-)
Index Code Part Number Description Qty Serial No.
1 21W-06-51114 Wiring Harness 1 15872-
21W-06-51113 Wiring Harness 1 15506-15871
2 08041-03000 Fuse, 30Amp. 2 15506-
3 08041-02000 Fuse, 20Amp. 3 15506-
4 08041-01500 Fuse, 15Amp. 1 15506-
5 08041-01000 Fuse, 10Amp. 9 15506-
6 08041-00500 Fuse, 5Amp. 5 15506-
7 20T-06-81230 Fusible Link, 45Amp. 2 15506-
8 HM6440-0129 F-Connector, Pink 5 15506-
9 HM6440-0128 M-Connector, Pink 5 15506-
10 HM6400-0013 F-Connector, Green 1 15506-
11 HM6409-0072 M-Connector, Green 1 15506-
12 HM6400-0012 F-Connector, Black 1 15506-
13 HM6409-0071 M-Connector, Black 1 15506-
14 22P-06-11840 Bracket 1 15506-
15 600-815-2170 Switch, Heater, Ribbon Heater Relay 1 15506-
16 01010-80616 Bolt 2 15506-
17 01643-30623 Washer 2 15506-
18 01010-80816 Bolt 2 15506-
19 01643-30823 Washer 2 15506-
20 04434-50610 Clip 1 15506-
21 04434-51910 Clip 1 15506-
22 01010-81020 Bolt 1 15506-
23 01643-31032 Washer 1 15506-
24 08038-02027 Cap 1 15506-
25 08038-04030 Cap 1 15506-
26 08038-00519 Cap 1 15506-
27 01010-81020 Bolt 3 15506-
28 01643-31032 Washer 3 15506-
29 01010-80816 Bolt 1 15506-
Reference:K1110-044006 Page:K019006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Wiring Harness (#15506-)
Index Code Part Number Description Qty Serial No.
30 01643-30823 Washer 1 15506-
31 22B-54-23221 Grommet 1 15506-
32 08034-20536 Band 1 15506-

Reference:K1110-044006 Page:K019006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000757
3
4

2 1

16
6
7
17
5
17
21 22
23
25
23 24 8
22 21
21

19
20 11
18
15

10

14
13
14 13
12 12

Reference:K1110-044007 Page:K019007

PC78US-8 S/N 15001-UP


Floor Frame, Electric Parts (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-06-11432 Bracket 1 19304-
A2 22P-06-11431 Bracket 1 15506-19303
2 7835-46-7002 Controller 1 15872-
7835-46-7001 Controller 1 15506-15871
3 01010-80820 Bolt 4 15506-
4 01643-30823 Washer 4 15506-
5 7861-94-3000 Resistor 1 15506-
6 01010-80816 Bolt 2 15506-
7 01643-30823 Washer 2 15506-
8 22B-06-21430 Wiring Harness 1 15506-
9 208-43-71420 Cap 2 15506-
10 08211-01920 Clip 1 15506-
11 08211-01020 Clip 1 15506-
12 04434-52711 Clip 2 15506-
13 01010-80816 Bolt 2 15506-
14 01643-30823 Washer 2 15506-
15 01023-10620 Screw 2 15506-
16 22P-06-11370 Sheet 1 15506-
17 22U-43-23290 Clip 3 15506-
18 04434-51908 Clip 1 15506-
19 01010-80816 Bolt 1 15506-
20 01643-30823 Washer 1 15506-
21 7861-74-5100 Relay 7 15506-
22 01010-80612 Bolt 8 15506-
23 01643-30623 Washer 8 15506-
24 8233-06-3350 Diode 3 15506-
25 421-07-31270 Relay 2 15506-

Reference:K1110-044007 Page:K019007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001477

12 2
11 7
14 8
13 18 22 15
26
21
28
23 4
27 17 3
18
16
25 10
20 6
24 9
21 19 5

Reference:K1110-044008 Page:K019008

PC78US-8 S/N 15001-UP


Floor Frame, Wiring Harness Clamp, Floor Frame (#15506-)
Index Code Part Number Description Qty Serial No.
1 08211-01520 Clip 1 15506-
2 04434-53411 Clip 1 15506-
3 01010-81025 Bolt 1 15506-
4 01643-31032 Washer 1 15506-
5 01010-80816 Bolt 2 15506-
6 01643-30823 Washer 2 15506-
7 04434-52711 Clip 1 15506-
8 07095-20420 Cushion 1 15506-
9 01010-81020 Bolt 1 15506-
10 01643-31032 Washer 1 15506-
11 155-61-15350 Clip 1 15506-
12 22M-62-13660 Cushion 1 15506-
13 01010-81020 Bolt 1 15506-
14 01643-31032 Washer 1 15506-
15 04434-53411 Clip 1 15506-
16 01010-81020 Bolt 1 15506-
17 01643-31032 Washer 1 15506-
18 04434-53411 Clip 2 15506-
19 01010-81020 Bolt 2 15506-
20 01643-31032 Washer 2 15506-
21 08211-00720 Clip 2 15506-
22 08211-01020 Clip 1 15506-
23 04434-51010 Clip 1 15506-
24 01010-81020 Bolt 1 15506-
25 01643-31032 Washer 1 15506-
26 08193-20010 Clip 1 15506-
27 01010-81020 Bolt 1 15506-
28 01643-31032 Washer 1 15506-

Reference:K1110-044008 Page:K019008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001494

9
1 8
5

Reference:K1110-044009 Page:K019009

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Lever L.H. (#15506-)
Index Code Part Number Description Qty Serial No.
20Y-43-22611 Lever Assembly 1 15506-
1 20Y-43-22211 Lever 1 15506-
20Y-43-22621 Knob 1 15506-
2 20Y-43-22630 Knob 1 15506-
3 20Y-43-22421 Insert 1 15506-
4 20Y-43-22250 Plate 1 15506-
5 20Y-43-22261 Boot 1 15506-
6 20Y-43-22370 Boot 1 15506-
7 600-411-1280 Nut 1 15506-
8 01252-41025 Bolt 1 15506-
9 01643-51032 Washer 1 15506-

Reference:K1110-044009 Page:K019009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011336
19

13

18

16
17

15

14

11
11 12

12
10
10 7
7
8
9
6
6 5
5
4
4
1

2
3

Reference:K1110-044010 Page:K019010

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Work Equipment, L.H. (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-04510 Valve, Pilot 1 15506-
1 C1 Body, Valve 1 15506-
2 C1 Plug 2 15506-
3 C1 Plug 2 15506-
4 C1 Valve 4 15506-
5 702-16-51140 Shim, T=0.30mm 4 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
6 702-16-71350 Spring 4 15506-
7 702-16-53140 Retainer 4 15506-
8 702-16-53470 Spring 2 15506-
9 702-16-53590 Spring 2 15506-
10 702-16-53170 Piston 4 15506-
11 702-16-71150 Seal 4 15506-
12 702-16-71160 Seat 4 15506-
13 702-16-71280 Boot 1 15506-
14 702-16-71141 Plate 1 15506-
15 702-16-71131 Plate 1 15506-
16 01010-80620 Bolt 4 15506-
17 702-16-51240 Joint, Universal 1 15506-
18 702-16-71361 Disc 1 15506-
19 702-16-71441 Nut 1 15506-

Reference:K1110-044010 Page:K019010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000762

5 37
4 3 36
6 39
27
29 1 38
20 2 8
7
20 17 4 56
9
20 40
13 52
41 51 54 53
21 13 26
42
28 19
29 18 43 33

34 13
15
35 16
25
22 24 10
23 14 57

12 57
11 33
50
49
33
30
33
45
31 46
32 50 44

55
50
48
47

Reference:K1110-044011 Page:K019011

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, L.H. (#15506-16168)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15506-@
2 01643-30823 Washer 4 15506-@
3 20Y-62-18910 Plug 1 15506-@
4 07000-12018 O-ring 2 15506-@
5 20Y-62-18890 Bolt, Joint 1 15506-@
6 07000-12015 O-ring 2 15506-@
7 02781-0021D Union 4 15506-@
8 07002-11423 O-ring 4 15506-@
9 02896-11008 O-ring 4 15506-@
10 22B-43-23112 Frame 1 15506-@
11 01010-D1030 Bolt 4 15506-@
12 01643-71032 Washer 4 15506-@
13 06124-01616 Bearing 4 15506-@
14 22B-43-23721 Bracket 1 15506-@
15 22B-43-23161 Shaft 1 15506-@
16 01435-00612 Bolt 1 15506-@
17 22B-43-23471 Spring 1 15506-@
18 04050-12015 Pin, Cotter 1 15506-@
19 01640-20816 Washer 1 15506-@
20 426-925-3981 Washer 3 15506-@
21 22B-43-23142 Guide 1 15506-@
22 04205-30832 Pin 2 15506-@
23 21U-43-32430 Collar 2 15506-@
24 04050-12015 Pin, Cotter 2 15506-@
25 01640-20816 Washer 2 15506-@
26 21U-43-32380 Spring, Gas 1 15506-@
27 04050-12015 Pin, Cotter 1 15506-@
28 04050-13015 Pin, Cotter 1 15506-@
29 01640-20816 Washer 2 15506-@
30 22B-06-21420 Switch, Work Equipment Lock 1 15506-@
Reference:K1110-044011 Page:K019011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, L.H. (#15506-16168)
Index Code Part Number Description Qty Serial No.
31 22U-06-22490 Plate 1 15506-@
32 01023-60320 Screw 2 15506-@
33 08059-00310 Clip 4 15506-16168
34 20Y-54-11611 Stopper 1 15506-@
35 01580-11008 Nut 1 15506-@
36 208-06-19170 Clip 1 15506-@
37 04434-51410 Clip 1 15506-@
38 01010-81025 Bolt 1 15506-@
39 01643-31032 Washer 1 15506-@
40 22B-43-23213 Cover 1 15506-@
41 01010-80616 Bolt 4 15506-@
42 01643-30623 Washer 4 15506-@
43 20Y-43-41290 Collar 4 15506-@
44 22B-43-23221 Cover 1 15506-@
45 01245-00616 Screw 2 15506-@
46 01643-70623 Washer 2 15506-@
47 01010-80616 Bolt 1 15506-@
48 01643-30623 Washer 1 15506-@
49 01435-00616 Bolt 4 15506-@
50 20Y-43-41290 Collar 7 15506-@
51 22B-43-23231 Cover 1 15506-@
52 01245-00616 Screw 2 15506-@
53 01643-70623 Washer 2 15506-@
54 20Y-43-41290 Collar 2 15506-@
55 22B-43-23271 Cover 1 15506-@
56 08059-00515 Clip 1 15506-16168
57 22B-43-23280 Seal 2 15506-@

Reference:K1110-044011 Page:K019011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006698

5 37
4 3 36
6 39
27
29 1 38
20 2 8
7
20 17 4
9 56
20
40
13 52
41 51 54 53
21 13 26
42
28 19
29 18 43 56

34 13
15
35 16
25
22 24 10
23 14 57

12 57
11
33
50
49
33
30
33
45
31 46
32 50 44

55
50
48
47

Reference:K1110-044011A Page:K019012

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, L.H. (#16169-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15506-
2 01643-30823 Washer 4 15506-
3 20Y-62-18910 Plug 1 15506-
4 07000-12018 O-ring 2 15506-
5 20Y-62-18890 Bolt, Joint 1 15506-
6 07000-12015 O-ring 2 15506-
7 02781-0021D Union 4 15506-
8 07002-11423 O-ring 4 15506-
9 02896-11008 O-ring 4 15506-
10 22B-43-23112 Frame 1 15506-
11 01010-D1030 Bolt 4 15506-
12 01643-71032 Washer 4 15506-
13 06124-01616 Bearing 4 15506-
14 22B-43-23722 Bracket 1 19440-
A2 22B-43-23721 Bracket 1 15506-19439
15 22B-43-23161 Shaft 1 15506-
16 01435-00612 Bolt 1 15506-
17 22B-43-23471 Spring 1 15506-
18 04050-12015 Pin, Cotter 1 15506-
19 01640-20816 Washer 1 15506-
20 426-925-3981 Washer 3 15506-
21 22B-43-23143 Guide 1 19440-
A2 22B-43-23142 Guide 1 15506-19439
22 04205-30835 Pin 2 15506-
23 21U-43-32430 Collar 2 15506-
24 04050-12015 Pin, Cotter 2 15506-
25 01640-20816 Washer 2 15506-
26 21U-43-32380 Spring, Gas 1 15506-
27 04050-12015 Pin, Cotter 1 15506-
28 04050-13015 Pin, Cotter 1 15506-
Reference:K1110-044011A Page:K019012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, L.H. (#16169-)
Index Code Part Number Description Qty Serial No.
29 01640-20816 Washer 2 15506-
30 22B-06-21420 Switch, Work Equipment Lock 1 15506-
31 22U-06-22490 Plate 1 15506-
32 01023-60320 Screw 2 15506-
33 08059-00310 Clip 3 16169-
34 20Y-54-11611 Stopper 1 15506-
35 01580-11008 Nut 1 15506-
36 208-06-19170 Clip 1 15506-
37 04434-51410 Clip 1 15506-28942
38 01010-81025 Bolt 1 15506-
39 01643-31032 Washer 1 15506-
40 22B-43-23213 Cover 1 15506-
41 01010-80616 Bolt 4 15506-
42 01643-30623 Washer 4 15506-
43 20Y-43-41290 Collar 4 15506-
44 22B-43-23221 Cover 1 15506-
45 01245-00616 Screw 2 15506-
46 01643-70623 Washer 2 15506-
47 01010-80616 Bolt 1 15506-
48 01643-30623 Washer 1 15506-
49 01435-00616 Bolt 4 15506-
50 20Y-43-41290 Collar 7 15506-
51 22B-43-23231 Cover 1 15506-
52 01245-00616 Screw 2 15506-
53 01643-70623 Washer 2 15506-
54 20Y-43-41290 Collar 2 15506-
55 22B-43-23271 Cover 1 15506-
56 08059-00515 Clip 2 16169-
57 22B-43-23280 Seal 2 15506-

Reference:K1110-044011A Page:K019012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001502
4 3
16
5
1 2
13
10 15
4
5 11
17
2 9
3

14
8
6 7
14

12

Reference:K1110-044012 Page:K019013

PC78US-8 S/N 15001-UP


Floor Frame, Radio (#15506-28942)
Index Code Part Number Description Qty Serial No.
1 2A5-06-11932 Radio 1 28943-@
A2 20Y-06-42430 Radio 1 15893-28942
A2 20Y-06-41238 Radio 1 15506-15892
2 20Y-43-41482 Plate 2 15506-@
3 01023-60510 Screw 6 15506-@
4 01010-80616 Bolt 4 15506-@
5 01643-30623 Washer 4 15506-@
6 22B-43-23171 Bracket 1 15506-@
7 01010-80616 Bolt 2 15506-@
8 01643-30623 Washer 2 15506-@
9 22B-43-23181 Bracket 1 15506-@
10 01010-80616 Bolt 2 15506-@
11 01643-30623 Washer 2 15506-@
12 21W-06-61170 Wiring Harness 1 28943-@
A2 21W-06-51271 Wiring Harness 1 16169-28942
A2 21W-06-51270 Wiring Harness 1 15506-16168
13 08034-20414 Band, Black 2 15506-28942
14 08034-20519 Band 2 15506-28942
15 22B-54-28990 Sheet 1 15506-@
16 20Y-06-41830 Wiring Harness 1 15506-28942
17 08912-51600 Cord 1 15506-28942

Reference:K1110-044012 Page:K019013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014576
4
3
5
1 2

10 13
4
11
5
9
2 15 14
3
13
12 16
6
12

15
13

8 13
7

Reference:K1110-044012A Page:K019014

PC78US-8 S/N 15001-UP


Floor Frame, Radio (#28943-)
Index Code Part Number Description Qty Serial No.
1 2A5-06-11932 Radio 1 28943-
2 20Y-43-41482 Plate 2 15506-
3 01023-60510 Screw 6 15506-
4 01010-80616 Bolt 4 15506-
5 01643-30623 Washer 4 15506-
6 22B-43-23171 Bracket 1 15506-
7 01010-80616 Bolt 2 15506-
8 01643-30623 Washer 2 15506-
9 22B-43-23181 Bracket 1 15506-
10 01010-80616 Bolt 2 15506-
11 01643-30623 Washer 2 15506-
12 21W-06-61170 Wiring Harness 1 28943-
13 08034-20519 Band 4 28943-
14 22B-54-28990 Sheet 1 15506-
15 566-07-12151 Cable 1 28943-
16 04434-51410 Clip 1 28943-

Reference:K1110-044012A Page:K019014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000764

2 1

Reference:K1110-044013 Page:K019015

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Lock Lever (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-43-13111 Lever 1 15506-
2 22U-43-22490 Knob 1 15506-
3 20T-43-71280 Pin 1 15506-

Reference:K1110-044013 Page:K019015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA022737
3

7
4

10
11
1
12

Reference:K1110-044014 Page:K019016

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Control Lever, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
22U-43-21172 Lever Assembly 1 15506-
1 20Y-43-22221 Lever 1 15506-
22U-43-21192 Knob 1 15506-
2 C1 Screw 1 15506-
3 20Y-43-22390 Knob 1 15506-
4 20Y-43-22421 Insert 1 15506-
5 22U-43-21211 Switch 1 15506-
6 20Y-43-22250 Plate 1 15506-
7 20Y-43-22261 Boot 1 15506-
8 20Y-43-22370 Boot 1 15506-
9 600-411-1280 Nut 1 15506-
10 01252-41025 Bolt 1 15506-
11 01643-51032 Washer 1 15506-
12 08034-40521 Band 1 15506-

Reference:K1110-044014 Page:K019016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011336
19

13

18

16
17

15

14

11
11 12

12
10
10 7
7
8
9
6
6 5
5
4
4
1

2
3

Reference:K1110-044015 Page:K019017

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Work Equipment, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-04510 Valve, Pilot 1 15506-
1 C1 Body, Valve 1 15506-
2 C1 Plug 2 15506-
3 C1 Plug 2 15506-
4 C1 Valve 4 15506-
5 702-16-51140 Shim, T=0.30mm 4 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
6 702-16-71350 Spring 4 15506-
7 702-16-53140 Retainer 4 15506-
8 702-16-53470 Spring 2 15506-
9 702-16-53590 Spring 2 15506-
10 702-16-53170 Piston 4 15506-
11 702-16-71150 Seal 4 15506-
12 702-16-71160 Seat 4 15506-
13 702-16-71280 Boot 1 15506-
14 702-16-71141 Plate 1 15506-
15 702-16-71131 Plate 1 15506-
16 01010-80620 Bolt 4 15506-
17 702-16-51240 Joint, Universal 1 15506-
18 702-16-71361 Disc 1 15506-
19 702-16-71441 Nut 1 15506-

Reference:K1110-044015 Page:K019017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001508
1
2
34
5 35
4 3
6
4 36
8

7
6
9
16
33
17
18

26
16
17
18 10
15
27
29 28
31
30

11
12
24
25
32

37 14
13

25
23
22

19
25
21
20

Reference:K1110-044016 Page:K019018

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15506-
2 01643-30823 Washer 4 15506-
3 20Y-62-18910 Plug 1 15506-
4 07000-12018 O-ring 2 15506-
5 20Y-62-18890 Bolt, Joint 1 15506-
6 07000-12015 O-ring 2 15506-
7 02781-0021D Union 4 15506-
8 07002-11423 O-ring 4 15506-
9 02896-11008 O-ring 4 15506-
10 22P-43-13261 Frame 1 15506-
11 01010-D1230 Bolt 4 15506-
12 01643-71232 Washer 4 15506-
13 22U-43-23251 Sheet 1 15506-
14 22U-43-23290 Clip 2 15506-
15 20Y-43-41324 Cover 1 18212-
20Y-43-41323 Cover 1 15506-18211
16 01010-80616 Bolt 4 15506-
17 01643-30623 Washer 4 15506-
18 20Y-43-41290 Collar 4 15506-
19 22P-43-13240 Cover 1 15506-
20 01245-00616 Screw 2 15506-
21 01643-70623 Washer 2 15506-
22 01010-80616 Bolt 1 15506-
23 01643-30623 Washer 1 15506-
24 01435-00616 Bolt 2 15506-
25 20Y-43-41290 Collar 5 15506-
26 22B-43-23251 Cover 1 15506-
27 01245-00616 Screw 2 15506-
28 01643-70623 Washer 2 15506-
29 20Y-43-41290 Collar 2 15506-
Reference:K1110-044016 Page:K019018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
30 01245-00616 Screw 3 15506-
31 01643-70623 Washer 3 15506-
32 09415-02512 Cap 1 15506-
33 208-06-19170 Clip 1 15506-
34 01010-81030 Bolt 1 15506-
35 01643-31032 Washer 1 15506-
36 103-21-21260 Boss 1 15506-
37 21W-43-51130 Seal 1 15506-

Reference:K1110-044016 Page:K019018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001540
9
8

12

6 12
10
5
2
13
3 14
4

11

Reference:K1110-044017 Page:K019019

PC78US-8 S/N 15001-UP


Floor Frame, Starting Switch and Switch (#15001-)
Index Code Part Number Description Qty Serial No.
1 08086-20000 Switch, Starting 1 15001-
2 20Y-43-41740 Plate 1 15001-
3 20Y-43-41750 Washer 3 15001-
4 20Y-43-41790 Washer 1 15001-
5 22U-06-22380 Potentiometer 1 15001-
6 22U-06-22460 Spring 1 15001-
7 20Y-43-41781 Knob 1 18494-
20Y-43-41780 Knob 1 15001-18493
8 20Y-06-42450 Switch, Lamp 1 28942-
A2 20Y-06-42121 Switch, Lamp 1 15001-28941
9 20Y-06-42190 Cover 4 15001-
10 21W-06-51240 Wiring Harness 1 15001-
11 22U-43-23260 Clip 1 15001-
12 04434-51710 Clip 2 15001-
13 01010-81016 Bolt 2 15001-
14 01643-31032 Washer 2 15001-

Reference:K1110-044017 Page:K019019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000768
3

35

36 49
38
19
50 40 48
39 39
34 45
41 43
47
42 26 34
39
46 20
43
34 5 11
52
42 33 7
26 34 13
44
30 10

34 2

21 6 9 8

12 14
37 28
29 15
22
34 16

27
4
27

1 17
24

23
29

25 31

32 51
34
19
18

Reference:K1110-044018 Page:K019020

PC78US-8 S/N 15001-UP


Floor Frame, Air Conditioner Unit (#15506-)
Index Code Part Number Description Qty Serial No.
22B-979-2703 Air Conditioner Assembly 1 28941-
A2 22B-979-2702 Air Conditioner Assembly 1 20782-28940
A2 22B-979-2701 Air Conditioner Assembly 1 15506-20781
1 ND245450-6630 Case 1 15506-
2 ND245450-6640 Case 1 15506-
3 ND245450-6650 Case 1 15506-
4 ND116576-8040 Plate 1 15506-
ND446010-4660 Evaporator Assembly 1 15506-
5 ND446600-1472 Evaporator 1 15506-
6 ND949142-0020 O-ring 1 15506-
7 ND949142-0030 O-ring 1 15506-
8 ND446250-5990 Tube 1 15506-
9 ND447500-2980 Valve 1 19806-
A2 ND447500-2660 Valve 1 15506-19805
10 ND949046-3100 Bolt 1 15506-
11 ND146687-2091 Packing 1 15506-
12 ND146687-2080 Packing 1 15506-
13 ND146687-6350 Packing 1 15506-
14 ND146657-8850 Packing 1 15506-
15 ND949046-3610 Bolt 2 15506-
16 ND445021-3091 Plug 1 28941-
ND445021-3941 Plug 1 15506-28940
17 ND116420-6830 Heater 1 15506-
18 ND116340-8820 Motor Assembly 1 15506-
19 ND949008-0330 Screw, Tapping 4 15506-
20 ND077800-1130 Transistor 1 28941-
ND077800-1040 Transistor 1 15506-28940
21 ND077500-5890 Thermistor Assembly 1 15506-
22 ND246790-2060 Clamp 1 15506-
23 ND077500-0650 Thermistor 1 15506-
Reference:K1110-044018 Page:K019020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Air Conditioner Unit (#15506-)
Index Code Part Number Description Qty Serial No.
24 ND017661-3700 Clamp 1 15506-
25 ND063600-4580 Servo Motor Assembly 1 15506-
26 ND063800-0300 Servo Motor Assembly 2 15506-
27 ND116660-0600 Door 2 15506-
28 ND116740-2290 Door 1 28941-
ND116640-8051 Dumper 1 15506-28940
29 ND116650-9870 Door 2 15506-
30 ND017231-1400 Clamp 1 15506-
31 ND116682-0670 Lever 1 15506-
32 ND116662-8420 Shaft 1 15506-
33 ND017212-1720 Lock 1 15506-
34 ND949001-1730 Screw, Tapping 38 15506-
35 ND146687-6360 Packing 1 15506-
36 ND146687-6370 Packing 1 15506-
37 ND146687-6380 Packing 1 15506-
38 ND145530-1210 Filter, Recirculation Air 1 15506-
39 ND949008-0460 Screw, Tapping 3 15506-
40 ND116576-8050 Plate 1 15506-
41 ND116576-8060 Plate 1 15506-
42 ND116780-4690 Lever 2 15506-
43 ND116780-4700 Lever 2 15506-
44 ND116780-4710 Lever 1 15506-
45 ND116682-7310 Lever 1 15506-
46 ND116782-1370 Lever 1 15506-
47 ND116662-8430 Shaft 1 15506-
48 ND116662-8440 Shaft 1 15506-
49 ND246470-5634 Wiring Harness 1 28941-
ND246470-5631 Wiring Harness 1 15506-28940
50 ND246780-1370 Clamp 1 15506-
51 ND146687-6400 Packing 1 15506-
52 ND017780-3110 Cable 1 15506-

Reference:K1110-044018 Page:K019020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001513
8

9
10
11

1 7
4
2
3

5 6

17 16
20 14
13 15

12

21

17
15
22

20 23

21
16
18
14
19

Reference:K1110-044019 Page:K019021

PC78US-8 S/N 15001-UP


Floor Frame, Air Conditioner Piping (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-80825 Bolt 5 15506-
2 01643-30823 Washer 5 15506-
3 208-979-7540 Collar 5 15506-
4 22P-53-13141 Bracket 1 15506-
5 01010-D0616 Bolt 1 15506-
6 01643-70623 Washer 1 15506-
7 08211-01520 Clip 1 15506-
8 22B-979-2781 Duct 1 15506-
9 01010-80825 Bolt 2 15506-
10 01643-30823 Washer 2 15506-
11 208-979-7540 Collar 2 15506-
12 22P-979-1850 Hose 1 15506-
13 22P-979-1870 Hose 1 15506-
14 21W-979-5111 Hose 1 15506-
15 20Y-979-3150 O-ring 2 15506-
16 21W-979-5121 Hose 1 15506-
17 20Y-979-3130 O-ring 2 15506-
18 208-979-7650 Connector 1 15506-
19 01435-40620 Bolt 1 15506-
20 21W-979-5131 Hose 1 15506-
21 21W-979-5141 Hose 1 15506-
22 09479-02400 Clip 2 15506-
23 08034-20536 Band 1 15506-

Reference:K1110-044019 Page:K019021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001518
30 23 33
29
32
33
21 34 20
34
13 15 17
27 12
15
31 32 25 15 19
8
10 3
16
6
14
18
4

30
32
2 24

13 29
22 21 34
15 34 33 23 33
17
7 6 16
11
5 14 12
9
28 10 19
4 15
26 18
25 8
32 15
31
27

35

Reference:K1110-044020 Page:K019022

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-62-15151 Hose 1 15506-
2 22P-62-15371 Hose 1 15506-
3 22P-62-15202 Hose Assembly 1 21086-
A1 22P-62-15201 Hose Assembly 1 15506-21085
4 22P-62-15332 Hose 1 21086-
A1 22P-62-15331 Hose 1 15506-21085
5 20U-62-22190 O-ring 1 15506-
6 22P-62-15292 Hose 1 21086-
A1 22P-62-15291 Hose 1 15506-21085
7 20U-62-22190 O-ring 1 15506-
8 22P-62-15232 Hose 1 21086-
A1 22P-62-15231 Hose 1 15506-21085
9 20U-62-22190 O-ring 1 15506-
10 22P-62-15332 Hose 1 21086-
A1 22P-62-15331 Hose 1 15506-21085
11 20U-62-22190 O-ring 1 15506-
12 22P-62-15211 Hose 1 15506-
13 22P-62-15121 Hose 1 15506-
14 20Y-62-22860 Band, Brown 2 15506-
15 20Y-62-22850 Band, Green 6 15506-
16 20Y-62-22830 Band, White 2 15506-
17 20Y-62-22820 Band, Blue 2 15506-
18 21U-62-34740 Band, Orange 2 15506-
19 20Y-62-22790 Band, Red 2 15506-
20 22P-62-15102 Hose Assembly 1 21086-
A1 22P-62-15101 Hose Assembly 1 15506-21085
21 22P-62-15142 Hose 1 21086-
A1 22P-62-15141 Hose 1 15506-21085
22 20U-62-22190 O-ring 1 15506-
23 22P-62-15132 Hose 1 21086-
Reference:K1110-044020 Page:K019022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping (#15506-)
Index Code Part Number Description Qty Serial No.
23 A1 22P-62-15131 Hose 1 15506-21085
24 20U-62-22190 O-ring 1 15506-
25 22P-62-15142 Hose 1 21086-
A1 22P-62-15141 Hose 1 15506-21085
26 20U-62-22190 O-ring 1 15506-
27 22P-62-15282 Hose 1 21086-
A1 22P-62-15281 Hose 1 15506-21085
28 20U-62-22190 O-ring 1 15506-
29 22P-62-15111 Hose 1 15506-
30 22P-62-15191 Hose 1 15506-
31 20Y-62-22840 Band, Black 2 15506-
32 20Y-62-22820 Band, Blue 6 15506-
33 20Y-62-22810 Band, Yellow 4 15506-
34 20Y-62-22790 Band, Red 4 15506-
35 22P-62-15261 Hose 1 15506-

Reference:K1110-044020 Page:K019022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001542
1

13 14
17
15
16
18 2

4
18

7
4
3

4
10
6
7 7 5
10 12
11
9
8

Reference:K1110-044021 Page:K019023

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve Piping Clamp (#15506-)
Index Code Part Number Description Qty Serial No.
1 08034-20536 Band 3 15506-
2 134-03-61410 Band 2 15506-
3 21W-54-42291 Grommet 1 15506-
4 04434-53411 Clip 3 15506-
5 01010-81020 Bolt 3 15506-
6 01643-31032 Washer 3 15506-
7 04434-52711 Clip 3 15506-
8 01010-81020 Bolt 2 15506-
9 01643-31032 Washer 2 15506-
10 04434-52711 Clip 2 15506-
11 01010-81020 Bolt 2 15506-
12 01643-31032 Washer 2 15506-
13 22P-53-13151 Grommet 1 15506-
14 08034-20536 Band 1 15506-
15 208-06-19170 Clip 1 15506-
16 01010-81020 Bolt 1 15506-
17 01643-31032 Washer 1 15506-
18 04435-51510 Clip 2 15506-

Reference:K1110-044021 Page:K019023
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001544

9
20 8 5
17 8
7
8
8
19 6
20
16 9
19 22 1 9
23 8 4
7 8
9
21 19
15 10
20 11
18 3
19 11
19 2
16 8 10
20 4
12 19 9
23 15
22 20
14
13

Reference:K1110-044022 Page:K019024

PC78US-8 S/N 15001-UP


Floor Frame, P-Block and T-Block (#15506-)
Index Code Part Number Description Qty Serial No.
1 21W-62-42351 Block 1 15506-
2 01010-80845 Bolt 2 15506-
3 01643-30823 Washer 2 15506-
4 02781-0021D Union 2 15506-
5 11Y-62-12330 Tee 1 15506-
6 07040-11409 Plug 1 15506-
7 02783-10210 Elbow 2 15506-
8 07002-11423 O-ring 6 15506-
9 02896-11008 O-ring 6 15506-
10 07040-11007 Plug 2 15506-
11 07002-11023 O-ring 2 15506-
12 21W-62-42351 Block 1 15506-
13 01010-80845 Bolt 2 15506-
14 01643-30823 Washer 2 15506-
15 02781-0021D Union 2 15506-
16 11Y-62-12230 Union 2 15506-
17 02782-10210 Elbow 1 15506-
18 11Y-62-12510 Elbow 1 15506-
19 07002-11423 O-ring 6 15506-
20 02896-11008 O-ring 5 15506-
21 02896-11009 O-ring 1 15506-
22 07040-11007 Plug 2 15506-
23 07002-11023 O-ring 2 15506-

Reference:K1110-044022 Page:K019024
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000773

Reference:K1110-044023 Page:K019025

PC78US-8 S/N 15001-UP


Floor Frame, Plug (#15506-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25590 Grommet 1 15506-

Reference:K1110-044023 Page:K019025
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY017767
28 27

23

24

12
18 20
22

16 25 19
26
17
15 13
11
21 29
14

18

17
15
1
2
3
4
6
5
7
10
9
8

Reference:K1110-044024 Page:K019026

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Swing and Attachment (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-04290 Valve, Pilot 1 15506-
1 C1 Valve Body 1 15506-
2 C1 Valve 2 15506-
3 702-16-51140 Shim, T=0.30mm 2 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
4 702-16-54550 Spring, L=22.73mm 2 15506-
5 702-16-54571 Retainer, T=5.9mm 2 15506-
6 702-16-54560 Spring 2 15506-
7 702-16-53170 Piston 2 15506-
8 702-16-51270 Seal 2 15506-
9 702-16-54580 Collar 2 15506-
10 702-16-54590 O-ring 2 15506-
11 C1 Lever 1 15506-
12 C1 Plate 1 15506-
13 C1 Shaft 1 15506-
14 702-16-54641 Boot 1 15506-
15 01252-30625 Bolt 2 15506-
16 702-16-54660 Plate 1 15506-
17 702-16-54650 Plate 2 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
18 702-21-07610 Valve, Solenoid 1 15506-
19 702-21-53680 O-ring 1 15506-
20 702-21-55620 Plug 1 15506-
21 702-21-53330 Screw 2 15506-
22 07002-11423 O-ring 1 15506-
23 700-22-11410 O-ring 2 15506-
24 702-21-39450 O-ring 1 15506-
25 07000-11008 O-ring 1 15506-
26 07000-12012 O-ring 1 15506-
27 C1 Body 1 15506-
Reference:K1110-044024 Page:K019026
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, PPC Valve for Swing and Attachment (#15506-)
Index Code Part Number Description Qty Serial No.
28 01252-60612 Bolt, Hexagon Socket Head 3 15506-
29 203-60-62220 Bolt 2 15506-

Reference:K1110-044024 Page:K019026
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001531
18

6
7 8
5 1
10
9
4

16
17

14

15

22
2 20 21
3 27
2 20
3 19
30 21
29
28
31 26
33
32 20 25
20
23
24
21 21

11
11
13
13 12
12

Reference:K1110-044025 Page:K019027

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Offset Control Pedal (#15506-)
Index Code Part Number Description Qty Serial No.
1 22U-43-21470 Seat 1 15506-
2 01010-81025 Bolt 2 15506-
3 01643-31032 Washer 2 15506-
4 01583-11408 Nut 1 15506-
5 20Y-62-25360 Bracket 1 15565-
22P-43-13620 Bracket 1 15506-15564
6 01010-81025 Bolt 2 15506-
7 01643-31032 Washer 2 15506-
8 22B-43-23730 Pedal 1 15506-
9 01010-D1045 Bolt 2 15506-
10 01643-71032 Washer 2 15506-
11 22B-43-23620 Plate 2 15506-
12 01010-81020 Bolt 4 15506-
13 01643-31032 Washer 4 15506-
22P-43-13691 Plate 1 15506-
14 C1 Plate 1 15506-
15 22B-43-23650 Sheet 1 15506-
16 01010-81020 Bolt 2 15506-
17 01643-31032 Washer 2 15506-
18 207-43-81240 Cap 1 15506-
19 21W-62-43980 Elbow 1 15506-
20 07000-12011 O-ring 4 15506-
21 02896-11008 O-ring 4 15506-
22 21W-62-43990 Elbow 1 15506-
23 21W-62-41780 Nipple 1 15506-
24 11Y-62-12140 Nipple 1 15506-
25 21W-62-51910 Hose 1 15506-
26 21W-62-51920 Hose 1 15506-
27 04434-51010 Clip 1 15506-
28 01010-81020 Bolt 1 15506-
Reference:K1110-044025 Page:K019027
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Work Equipment Offset Control Pedal (#15506-)
Index Code Part Number Description Qty Serial No.
29 01643-31032 Washer 1 15506-
30 20Y-01-21260 Spacer 1 15506-
31 04434-50610 Clip 1 15506-
32 01010-81040 Bolt 1 15506-
33 01643-31032 Washer 1 15506-

Reference:K1110-044025 Page:K019027
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
@@5X114@
12
18

16
17
15
13
11

14

17 2
15
3
4

5
7

10
9
8

Reference:K1110-044026 Page:K019028

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Blade (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-01270 Valve Assembly, PPC 1 15872-
702-16-01600 Valve Assembly, PPC 1 15506-15871
1 C1 Body 1 15506-
2 C1 Valve 2 15506-
3 702-16-51140 Shim, T=0.30mm 2 15506-
702-16-54670 Shim, T=0.20mm 2 15506-
4 702-16-54550 Spring, L=22.73mm 2 15506-
5 702-16-54571 Retainer, T=5.9mm 2 15506-
6 702-16-54560 Spring 2 15872-
702-16-54160 Spring 2 15506-15871
7 702-16-53170 Piston 2 15506-
8 702-16-51270 Seal 2 15506-
9 702-16-54580 Collar 2 15506-
10 702-16-54590 O-ring 2 15506-
11 C1 Lever 1 15506-
12 C1 Plate 1 15506-
13 C1 Shaft 1 15506-
14 702-16-54641 Boot 1 15506-
15 01252-30625 Bolt 2 15872-
01252-60625 Bolt 2 15506-15871
16 702-16-54660 Plate 1 15506-
17 702-16-54650 Plate 2 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
18 702-16-54880 Filter 1 15506-

Reference:K1110-044026 Page:K019028
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA018048
11

12

7 6 24
8 23 21

10 9
1
20
2
19 25
17 22
18
20
21
14
13 24 25
23 22
16

15

27 26

4
5 3

Reference:K1110-044027 Page:K019029

PC78US-8 S/N 15001-UP


Floor Frame, Blade Control Lever (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-D1025 Bolt 2 15506-
2 01643-71032 Washer 2 15506-
3 22P-43-13310 Bracket 1 15506-
4 01010-81040 Bolt 2 15506-
5 01643-31032 Washer 2 15506-
6 22B-43-33181 Lever 1 28941-
A2 22B-43-33180 Lever 1 19769-28940
A2 22P-43-13330 Lever 1 15506-19768
7 01010-D0825 Bolt 2 15506-
8 01643-70823 Washer 2 15506-
9 01583-11408 Nut 1 15506-
10 22U-43-21730 Seat 1 15506-
11 20T-43-71110 Knob 1 15506-
12 20T-43-71190 Nut 1 15506-
13 21W-62-42370 Elbow 1 15506-
14 07000-12011 O-ring 1 15506-
15 21W-62-42370 Elbow 1 15506-
16 07000-12011 O-ring 1 15506-
17 11Y-62-12140 Nipple 2 15506-
18 07000-12011 O-ring 2 15506-
19 02896-11008 O-ring 2 15506-
20 02760-00215 Hose, Face Seal Type, Red 1 15506-
21 21W-62-53360 Hose 1 15506-
22 20Y-62-22850 Band, Green 2 15506-
23 20Y-62-22830 Band, White 2 15506-
24 20Y-62-22820 Band, Blue 2 15506-
25 20Y-62-22790 Band, Red 2 15506-
26 22B-43-23580 Sheet 1 15506-
27 22B-54-16461 Rivet 2 15506-

Reference:K1110-044027 Page:K019029
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, With Blade, AM-FM Radio, EU, 1-Additional Actuator Piping, Overload Alarm
FIG. Name FIG. No.
Floor Frame, Floor, Frame K1110-047001
Floor Frame, PPC Valve for Travel K1110-047002
Floor Frame, Travel Lever and Travel Pedal K1110-047003
Floor Frame, Floor, Footrest, L.H. K1110-047004
Floor Frame, Floor, Base K1110-047005
Floor Frame, Wiring Harness K1110-047006
Floor Frame, Electric Parts K1110-047007
Floor Frame, Wiring Harness Clamp, Floor Frame K1110-047008
Floor Frame, Work Equipment Lever L.H. K1110-047009
Floor Frame, PPC Valve for Work Equipment, L.H. K1110-047010
Floor Frame, Console Box, L.H. (#15506-16168) K1110-047011
Floor Frame, Console Box, L.H. (#16169-) K1110-047011A
Floor Frame, Radio (#15506-28942) K1110-047012
Floor Frame, Radio (#28943-) K1110-047012A
Floor Frame, Work Equipment Lock Lever K1110-047013
Floor Frame, Work Equipment Control Lever, R.H. K1110-047014
Floor Frame, PPC Valve for Work Equipment, R.H. K1110-047015
Floor Frame, Console Box, R.H. K1110-047016
Floor Frame, Starting Switch and Switch K1110-047017
Floor Frame, Air Conditioner Unit K1110-047018
Floor Frame, Air Conditioner Piping K1110-047019
Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping K1110-047020
Floor Frame, PPC Valve Piping Clamp K1110-047021
Floor Frame, P-Block and T-Block K1110-047022
Floor Frame, Plug K1110-047023
Floor Frame, PPC Valve for Swing and Attachment K1110-047024
Floor Frame, Work Equipment Offset Control Pedal K1110-047025
Floor Frame, PPC Valve for Blade K1110-047026
Floor Frame, Blade Control Lever K1110-047027

Reference:X22-1095520 Page:K020000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001565
6
3
5 7
4

2
10
11
12
11 13
12
13

Reference:K1110-047001 Page:K020001

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Frame (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-53-13111 Floor 1 15506-
2 22P-53-13121 Plate 1 15506-
3 01010-81016 Bolt 2 15506-
4 01643-31032 Washer 2 15506-
5 22P-53-13130 Plate 1 15506-
6 01010-81016 Bolt 2 15506-
7 01643-31032 Washer 2 15506-
8 07286-03833 Hose 1 15506-
9 07280-04726 Clamp 1 15506-
10 22U-54-25581 Grommet 1 15506-
11 01010-81020 Bolt 4 15506-
12 01643-31032 Washer 4 15506-
13 01643-31032 Washer 4 15506-

Reference:K1110-047001 Page:K020001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY010653
25

23

31
29
30
2 28
3 27
4
6
5
7 26
9 23
8
31
29
30
28
27

18

24
11
19
13
10
22
21
11
12 20
19 18
15
14 17
16
19
20

12
21
22

Reference:K1110-047002 Page:K020002

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Travel (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-04271 Valve Assembly, PPC 1 21285-
702-16-04270 Valve Assembly, PPC 1 15001-21284
1 C1 Valve Body 1 15001-
2 C1 Valve 4 21285-
C1 Valve 4 15001-21284
3 702-16-51140 Shim, T=0.30mm 4 15001-
4 702-16-53420 Spring 4 15001-
5 702-16-53140 Retainer 4 15001-
6 702-16-54420 Spring 4 15001-
7 702-16-53170 Piston 4 15001-
8 702-16-71150 Seal 4 15001-
9 702-16-71160 Seat 4 15001-
10 C1 Case 1 15001-
11 C1 Lever 2 15001-
12 C1 Shaft 2 15001-
13 702-16-73640 Plate 1 15001-
14 01010-80855 Bolt 2 15001-
15 01643-30823 Washer 2 15001-
16 01010-80820 Bolt 4 21285-
01010-80816 Bolt 4 15001-21284
17 702-16-54331 Washer, T=1.60mm 4 15001-
702-16-54341 Washer, T=1.30mm 4 15001-
702-16-54351 Washer, T=1.00mm 4 15001-
702-16-56380 Washer, T=1.90mm 4 15001-
702-16-56390 Washer, T=2.20mm 4 15001-
18 C1 Pin, Spring 2 15001-
19 C1 Bushing 4 15001-
20 C1 O-ring 2 15001-
21 702-16-73610 Damper Assembly 2 15001-
22 01023-10306 Screw 4 15001-
Reference:K1110-047002 Page:K020002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, PPC Valve for Travel (#15001-)
Index Code Part Number Description Qty Serial No.
23 C1 Pin 2 15001-
24 04022-04016 Pin, Dowel 2 15001-
25 C1 Plug 2 15001-
26 C1 Plug 2 15001-
27 07040-11209 Plug 3 15001-
28 07002-11223 O-ring 3 15001-
29 C1 Ball 3 15001-
30 C1 Plug 3 15001-
31 C1 Seat 3 15001-

Reference:K1110-047002 Page:K020002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000753
19 20
11
12
18
10 17

16
13
5 17
14
6
3
4 15

10
8 12
11
9 21
27
22 7 28
1
23
14
2 13

25
24
30 26
29
30
30
29 33
30 34
31 30
34 29
30
32
34

Reference:K1110-047003 Page:K020003

PC78US-8 S/N 15001-UP


Floor Frame, Travel Lever and Travel Pedal (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-81020 Bolt 2 15506-
2 01643-31032 Washer 2 15506-
3 20Y-43-41361 Collar 4 15506-
4 20Y-43-41121 Cover 1 15506-
5 01010-81020 Bolt 4 15506-
6 01643-31032 Washer 4 15506-
7 203-43-51620 Spring 2 15506-
22U-43-21350 Cover Assembly 2 15506-
8 C1 Cover 1 15506-
9 22U-43-21360 Seal 1 15506-
10 20Y-43-41111 Lever 2 15506-
11 01010-D1045 Bolt 4 15506-
12 01643-71032 Washer 4 15506-
13 01010-81030 Bolt 4 15506-
14 01643-31032 Washer 4 15506-
15 22U-43-21111 Pedal 1 15506-
16 22U-43-21121 Pedal 1 15506-
17 21W-43-41441 Lever 2 15506-
18 20Y-43-21231 Knob 1 15506-
19 20Y-43-21241 Knob 1 15506-
20 01023-20416 Screw 2 15506-
21 7861-93-1840 Sensor, Pressure 1 15506-
07000-12011 O-ring 1 15506-
22 20Y-62-18910 Plug 1 15506-
23 07000-12018 O-ring 2 15506-
24 02781-00210 Union 1 15506-
25 07002-11423 O-ring 1 15506-
26 02896-11008 O-ring 1 15506-
27 22P-62-15270 Nipple 1 15506-
28 07002-11423 O-ring 1 15506-
Reference:K1110-047003 Page:K020003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Travel Lever and Travel Pedal (#15506-)
Index Code Part Number Description Qty Serial No.
29 21W-62-44640 Joint 4 15506-
30 07000-12015 O-ring 8 15506-
31 21W-62-44650 Union 1 15506-
32 21W-62-44660 Union 2 15506-
33 21W-62-44670 Union 1 15506-
34 02896-11008 O-ring 4 15506-

Reference:K1110-047003 Page:K020003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000754
3
4
1

5
6
2

Reference:K1110-047004 Page:K020004

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Footrest, L.H. (#15506-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25110 Footrest 1 15506-
2 22P-43-13680 Plate 1 15506-
3 01010-81025 Bolt 2 15506-
4 01643-31032 Washer 2 15506-
5 01010-81020 Bolt 1 15506-
6 01643-31032 Washer 1 15506-

Reference:K1110-047004 Page:K020004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000755
12

6 5
14
4
13

14 16
8 15
13 17

2 10
18
3
11
9

Reference:K1110-047005 Page:K020005

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Base (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-43-13442 Bracket 1 15506-
2 01010-D1235 Bolt 6 15506-
3 01643-71232 Washer 6 15506-
4 22M-43-21220 Adjuster 1 15506-
5 01252-80816 Bolt 3 15506-
6 22M-43-21230 Adjuster 1 15506-
7 01252-80816 Bolt 3 15506-
8 22P-43-13371 Pipe 1 15506-
9 22P-43-13351 Stopper 1 15506-
10 01010-D1020 Bolt 2 15506-
11 01643-71032 Washer 2 15506-
12 22P-43-13461 Frame 1 15506-
13 01252-80825 Bolt 6 15506-
14 01643-80823 Washer 6 15506-
15 21W-43-56130 Cover 1 15703-
22B-43-23461 Cover 1 15506-15702
16 01010-81020 Bolt 2 15506-
17 01643-31032 Washer 2 15506-
18 22B-43-23590 Trim 1 15506-

Reference:K1110-047005 Page:K020005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA009670
5 3
24 6 5
1 25 5 2
3 4
26 5
2 6
6 5
6 3
5

14

15 28
17 27
16
30
20
29
19
18

8 9

7
12 13
8 9

8 9
10 11
1

32
21
23 31
22

Reference:K1110-047006 Page:K020006

PC78US-8 S/N 15001-UP


Floor Frame, Wiring Harness (#15506-)
Index Code Part Number Description Qty Serial No.
1 21W-06-51114 Wiring Harness 1 15872-
21W-06-51113 Wiring Harness 1 15506-15871
2 08041-03000 Fuse, 30Amp. 2 15506-
3 08041-02000 Fuse, 20Amp. 3 15506-
4 08041-01500 Fuse, 15Amp. 1 15506-
5 08041-01000 Fuse, 10Amp. 9 15506-
6 08041-00500 Fuse, 5Amp. 5 15506-
7 20T-06-81230 Fusible Link, 45Amp. 2 15506-
8 HM6440-0129 F-Connector, Pink 5 15506-
9 HM6440-0128 M-Connector, Pink 5 15506-
10 HM6400-0013 F-Connector, Green 1 15506-
11 HM6409-0072 M-Connector, Green 1 15506-
12 HM6400-0012 F-Connector, Black 1 15506-
13 HM6409-0071 M-Connector, Black 1 15506-
14 22P-06-11840 Bracket 1 15506-
15 600-815-2170 Switch, Heater, Ribbon Heater Relay 1 15506-
16 01010-80616 Bolt 2 15506-
17 01643-30623 Washer 2 15506-
18 01010-80816 Bolt 2 15506-
19 01643-30823 Washer 2 15506-
20 04434-50610 Clip 1 15506-
21 04434-51910 Clip 1 15506-
22 01010-81020 Bolt 1 15506-
23 01643-31032 Washer 1 15506-
24 08038-02027 Cap 1 15506-
25 08038-04030 Cap 1 15506-
26 08038-00519 Cap 1 15506-
27 01010-81020 Bolt 3 15506-
28 01643-31032 Washer 3 15506-
29 01010-80816 Bolt 1 15506-
Reference:K1110-047006 Page:K020006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Wiring Harness (#15506-)
Index Code Part Number Description Qty Serial No.
30 01643-30823 Washer 1 15506-
31 22B-54-23221 Grommet 1 15506-
32 08034-20536 Band 1 15506-

Reference:K1110-047006 Page:K020006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000757
3
4

2 1

16
6
7
17
5
17
21 22
23
25
23 24 8
22 21
21

19
20 11
18
15

10

14
13
14 13
12 12

Reference:K1110-047007 Page:K020007

PC78US-8 S/N 15001-UP


Floor Frame, Electric Parts (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-06-11432 Bracket 1 19304-
A2 22P-06-11431 Bracket 1 15506-19303
2 7835-46-7002 Controller 1 15872-
7835-46-7001 Controller 1 15506-15871
3 01010-80820 Bolt 4 15506-
4 01643-30823 Washer 4 15506-
5 7861-94-3000 Resistor 1 15506-
6 01010-80816 Bolt 2 15506-
7 01643-30823 Washer 2 15506-
8 22B-06-21430 Wiring Harness 1 15506-
9 208-43-71420 Cap 2 15506-
10 08211-01920 Clip 1 15506-
11 08211-01020 Clip 1 15506-
12 04434-52711 Clip 2 15506-
13 01010-80816 Bolt 2 15506-
14 01643-30823 Washer 2 15506-
15 01023-10620 Screw 2 15506-
16 22P-06-11370 Sheet 1 15506-
17 22U-43-23290 Clip 3 15506-
18 04434-51908 Clip 1 15506-
19 01010-80816 Bolt 1 15506-
20 01643-30823 Washer 1 15506-
21 7861-74-5100 Relay 7 15506-
22 01010-80612 Bolt 8 15506-
23 01643-30623 Washer 8 15506-
24 8233-06-3350 Diode 3 15506-
25 421-07-31270 Relay 2 15506-

Reference:K1110-047007 Page:K020007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001477

12 2
11 7
14 8
13 18 22 15
26
21
28
23 4
27 17 3
18
16
25 10
20 6
24 9
21 19 5

Reference:K1110-047008 Page:K020008

PC78US-8 S/N 15001-UP


Floor Frame, Wiring Harness Clamp, Floor Frame (#15506-)
Index Code Part Number Description Qty Serial No.
1 08211-01520 Clip 1 15506-
2 04434-53411 Clip 1 15506-
3 01010-81025 Bolt 1 15506-
4 01643-31032 Washer 1 15506-
5 01010-80816 Bolt 2 15506-
6 01643-30823 Washer 2 15506-
7 04434-52711 Clip 1 15506-
8 07095-20420 Cushion 1 15506-
9 01010-81020 Bolt 1 15506-
10 01643-31032 Washer 1 15506-
11 155-61-15350 Clip 1 15506-
12 22M-62-13660 Cushion 1 15506-
13 01010-81020 Bolt 1 15506-
14 01643-31032 Washer 1 15506-
15 04434-53411 Clip 1 15506-
16 01010-81020 Bolt 1 15506-
17 01643-31032 Washer 1 15506-
18 04434-53411 Clip 2 15506-
19 01010-81020 Bolt 2 15506-
20 01643-31032 Washer 2 15506-
21 08211-00720 Clip 2 15506-
22 08211-01020 Clip 1 15506-
23 04434-51010 Clip 1 15506-
24 01010-81020 Bolt 1 15506-
25 01643-31032 Washer 1 15506-
26 08193-20010 Clip 1 15506-
27 01010-81020 Bolt 1 15506-
28 01643-31032 Washer 1 15506-

Reference:K1110-047008 Page:K020008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001494

9
1 8
5

Reference:K1110-047009 Page:K020009

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Lever L.H. (#15506-)
Index Code Part Number Description Qty Serial No.
20Y-43-22611 Lever Assembly 1 15506-
1 20Y-43-22211 Lever 1 15506-
20Y-43-22621 Knob 1 15506-
2 20Y-43-22630 Knob 1 15506-
3 20Y-43-22421 Insert 1 15506-
4 20Y-43-22250 Plate 1 15506-
5 20Y-43-22261 Boot 1 15506-
6 20Y-43-22370 Boot 1 15506-
7 600-411-1280 Nut 1 15506-
8 01252-41025 Bolt 1 15506-
9 01643-51032 Washer 1 15506-

Reference:K1110-047009 Page:K020009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011336
19

13

18

16
17

15

14

11
11 12

12
10
10 7
7
8
9
6
6 5
5
4
4
1

2
3

Reference:K1110-047010 Page:K020010

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Work Equipment, L.H. (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-04510 Valve, Pilot 1 15506-
1 C1 Body, Valve 1 15506-
2 C1 Plug 2 15506-
3 C1 Plug 2 15506-
4 C1 Valve 4 15506-
5 702-16-51140 Shim, T=0.30mm 4 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
6 702-16-71350 Spring 4 15506-
7 702-16-53140 Retainer 4 15506-
8 702-16-53470 Spring 2 15506-
9 702-16-53590 Spring 2 15506-
10 702-16-53170 Piston 4 15506-
11 702-16-71150 Seal 4 15506-
12 702-16-71160 Seat 4 15506-
13 702-16-71280 Boot 1 15506-
14 702-16-71141 Plate 1 15506-
15 702-16-71131 Plate 1 15506-
16 01010-80620 Bolt 4 15506-
17 702-16-51240 Joint, Universal 1 15506-
18 702-16-71361 Disc 1 15506-
19 702-16-71441 Nut 1 15506-

Reference:K1110-047010 Page:K020010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000762

5 37
4 3 36
6 39
27
29 1 38
20 2 8
7
20 17 4 56
9
20 40
13 52
41 51 54 53
21 13 26
42
28 19
29 18 43 33

34 13
15
35 16
25
22 24 10
23 14 57

12 57
11 33
50
49
33
30
33
45
31 46
32 50 44

55
50
48
47

Reference:K1110-047011 Page:K020011

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, L.H. (#15506-16168)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15506-@
2 01643-30823 Washer 4 15506-@
3 20Y-62-18910 Plug 1 15506-@
4 07000-12018 O-ring 2 15506-@
5 20Y-62-18890 Bolt, Joint 1 15506-@
6 07000-12015 O-ring 2 15506-@
7 02781-0021D Union 4 15506-@
8 07002-11423 O-ring 4 15506-@
9 02896-11008 O-ring 4 15506-@
10 22B-43-23112 Frame 1 15506-@
11 01010-D1030 Bolt 4 15506-@
12 01643-71032 Washer 4 15506-@
13 06124-01616 Bearing 4 15506-@
14 22B-43-23721 Bracket 1 15506-@
15 22B-43-23161 Shaft 1 15506-@
16 01435-00612 Bolt 1 15506-@
17 22B-43-23471 Spring 1 15506-@
18 04050-12015 Pin, Cotter 1 15506-@
19 01640-20816 Washer 1 15506-@
20 426-925-3981 Washer 3 15506-@
21 22B-43-23142 Guide 1 15506-@
22 04205-30832 Pin 2 15506-@
23 21U-43-32430 Collar 2 15506-@
24 04050-12015 Pin, Cotter 2 15506-@
25 01640-20816 Washer 2 15506-@
26 21U-43-32380 Spring, Gas 1 15506-@
27 04050-12015 Pin, Cotter 1 15506-@
28 04050-13015 Pin, Cotter 1 15506-@
29 01640-20816 Washer 2 15506-@
30 22B-06-21420 Switch, Work Equipment Lock 1 15506-@
Reference:K1110-047011 Page:K020011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, L.H. (#15506-16168)
Index Code Part Number Description Qty Serial No.
31 22U-06-22490 Plate 1 15506-@
32 01023-60320 Screw 2 15506-@
33 08059-00310 Clip 4 15506-16168
34 20Y-54-11611 Stopper 1 15506-@
35 01580-11008 Nut 1 15506-@
36 208-06-19170 Clip 1 15506-@
37 04434-51410 Clip 1 15506-@
38 01010-81025 Bolt 1 15506-@
39 01643-31032 Washer 1 15506-@
40 22B-43-23213 Cover 1 15506-@
41 01010-80616 Bolt 4 15506-@
42 01643-30623 Washer 4 15506-@
43 20Y-43-41290 Collar 4 15506-@
44 22B-43-23221 Cover 1 15506-@
45 01245-00616 Screw 2 15506-@
46 01643-70623 Washer 2 15506-@
47 01010-80616 Bolt 1 15506-@
48 01643-30623 Washer 1 15506-@
49 01435-00616 Bolt 4 15506-@
50 20Y-43-41290 Collar 7 15506-@
51 22B-43-23231 Cover 1 15506-@
52 01245-00616 Screw 2 15506-@
53 01643-70623 Washer 2 15506-@
54 20Y-43-41290 Collar 2 15506-@
55 22B-43-23271 Cover 1 15506-@
56 08059-00515 Clip 1 15506-16168
57 22B-43-23280 Seal 2 15506-@

Reference:K1110-047011 Page:K020011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006698

5 37
4 3 36
6 39
27
29 1 38
20 2 8
7
20 17 4
9 56
20
40
13 52
41 51 54 53
21 13 26
42
28 19
29 18 43 56

34 13
15
35 16
25
22 24 10
23 14 57

12 57
11
33
50
49
33
30
33
45
31 46
32 50 44

55
50
48
47

Reference:K1110-047011A Page:K020012

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, L.H. (#16169-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15506-
2 01643-30823 Washer 4 15506-
3 20Y-62-18910 Plug 1 15506-
4 07000-12018 O-ring 2 15506-
5 20Y-62-18890 Bolt, Joint 1 15506-
6 07000-12015 O-ring 2 15506-
7 02781-0021D Union 4 15506-
8 07002-11423 O-ring 4 15506-
9 02896-11008 O-ring 4 15506-
10 22B-43-23112 Frame 1 15506-
11 01010-D1030 Bolt 4 15506-
12 01643-71032 Washer 4 15506-
13 06124-01616 Bearing 4 15506-
14 22B-43-23722 Bracket 1 19440-
A2 22B-43-23721 Bracket 1 15506-19439
15 22B-43-23161 Shaft 1 15506-
16 01435-00612 Bolt 1 15506-
17 22B-43-23471 Spring 1 15506-
18 04050-12015 Pin, Cotter 1 15506-
19 01640-20816 Washer 1 15506-
20 426-925-3981 Washer 3 15506-
21 22B-43-23143 Guide 1 19440-
A2 22B-43-23142 Guide 1 15506-19439
22 04205-30835 Pin 2 15506-
23 21U-43-32430 Collar 2 15506-
24 04050-12015 Pin, Cotter 2 15506-
25 01640-20816 Washer 2 15506-
26 21U-43-32380 Spring, Gas 1 15506-
27 04050-12015 Pin, Cotter 1 15506-
28 04050-13015 Pin, Cotter 1 15506-
Reference:K1110-047011A Page:K020012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, L.H. (#16169-)
Index Code Part Number Description Qty Serial No.
29 01640-20816 Washer 2 15506-
30 22B-06-21420 Switch, Work Equipment Lock 1 15506-
31 22U-06-22490 Plate 1 15506-
32 01023-60320 Screw 2 15506-
33 08059-00310 Clip 3 16169-
34 20Y-54-11611 Stopper 1 15506-
35 01580-11008 Nut 1 15506-
36 208-06-19170 Clip 1 15506-
37 04434-51410 Clip 1 15506-28942
38 01010-81025 Bolt 1 15506-
39 01643-31032 Washer 1 15506-
40 22B-43-23213 Cover 1 15506-
41 01010-80616 Bolt 4 15506-
42 01643-30623 Washer 4 15506-
43 20Y-43-41290 Collar 4 15506-
44 22B-43-23221 Cover 1 15506-
45 01245-00616 Screw 2 15506-
46 01643-70623 Washer 2 15506-
47 01010-80616 Bolt 1 15506-
48 01643-30623 Washer 1 15506-
49 01435-00616 Bolt 4 15506-
50 20Y-43-41290 Collar 7 15506-
51 22B-43-23231 Cover 1 15506-
52 01245-00616 Screw 2 15506-
53 01643-70623 Washer 2 15506-
54 20Y-43-41290 Collar 2 15506-
55 22B-43-23271 Cover 1 15506-
56 08059-00515 Clip 2 16169-
57 22B-43-23280 Seal 2 15506-

Reference:K1110-047011A Page:K020012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001502
4 3
16
5
1 2
13
10 15
4
5 11
17
2 9
3

14
8
6 7
14

12

Reference:K1110-047012 Page:K020013

PC78US-8 S/N 15001-UP


Floor Frame, Radio (#15506-28942)
Index Code Part Number Description Qty Serial No.
1 2A5-06-11932 Radio 1 28943-@
A2 20Y-06-42430 Radio 1 15893-28942
A2 20Y-06-41238 Radio 1 15506-15892
2 20Y-43-41482 Plate 2 15506-@
3 01023-60510 Screw 6 15506-@
4 01010-80616 Bolt 4 15506-@
5 01643-30623 Washer 4 15506-@
6 22B-43-23171 Bracket 1 15506-@
7 01010-80616 Bolt 2 15506-@
8 01643-30623 Washer 2 15506-@
9 22B-43-23181 Bracket 1 15506-@
10 01010-80616 Bolt 2 15506-@
11 01643-30623 Washer 2 15506-@
12 21W-06-61170 Wiring Harness 1 28943-@
A2 21W-06-51271 Wiring Harness 1 16169-28942
A2 21W-06-51270 Wiring Harness 1 15506-16168
13 08034-20414 Band, Black 2 15506-28942
14 08034-20519 Band 2 15506-28942
15 22B-54-28990 Sheet 1 15506-@
16 20Y-06-41830 Wiring Harness 1 15506-28942
17 08912-51600 Cord 1 15506-28942

Reference:K1110-047012 Page:K020013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA014576
4
3
5
1 2

10 13
4
11
5
9
2 15 14
3
13
12 16
6
12

15
13

8 13
7

Reference:K1110-047012A Page:K020014

PC78US-8 S/N 15001-UP


Floor Frame, Radio (#28943-)
Index Code Part Number Description Qty Serial No.
1 2A5-06-11932 Radio 1 28943-
2 20Y-43-41482 Plate 2 15506-
3 01023-60510 Screw 6 15506-
4 01010-80616 Bolt 4 15506-
5 01643-30623 Washer 4 15506-
6 22B-43-23171 Bracket 1 15506-
7 01010-80616 Bolt 2 15506-
8 01643-30623 Washer 2 15506-
9 22B-43-23181 Bracket 1 15506-
10 01010-80616 Bolt 2 15506-
11 01643-30623 Washer 2 15506-
12 21W-06-61170 Wiring Harness 1 28943-
13 08034-20519 Band 4 28943-
14 22B-54-28990 Sheet 1 15506-
15 566-07-12151 Cable 1 28943-
16 04434-51410 Clip 1 28943-

Reference:K1110-047012A Page:K020014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000764

2 1

Reference:K1110-047013 Page:K020015

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Lock Lever (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-43-13111 Lever 1 15506-
2 22U-43-22490 Knob 1 15506-
3 20T-43-71280 Pin 1 15506-

Reference:K1110-047013 Page:K020015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA022737
3

7
4

10
11
1
12

Reference:K1110-047014 Page:K020016

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Control Lever, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
22U-43-21172 Lever Assembly 1 15506-
1 20Y-43-22221 Lever 1 15506-
22U-43-21192 Knob 1 15506-
2 C1 Screw 1 15506-
3 20Y-43-22390 Knob 1 15506-
4 20Y-43-22421 Insert 1 15506-
5 22U-43-21211 Switch 1 15506-
6 20Y-43-22250 Plate 1 15506-
7 20Y-43-22261 Boot 1 15506-
8 20Y-43-22370 Boot 1 15506-
9 600-411-1280 Nut 1 15506-
10 01252-41025 Bolt 1 15506-
11 01643-51032 Washer 1 15506-
12 08034-40521 Band 1 15506-

Reference:K1110-047014 Page:K020016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011336
19

13

18

16
17

15

14

11
11 12

12
10
10 7
7
8
9
6
6 5
5
4
4
1

2
3

Reference:K1110-047015 Page:K020017

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Work Equipment, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-04510 Valve, Pilot 1 15506-
1 C1 Body, Valve 1 15506-
2 C1 Plug 2 15506-
3 C1 Plug 2 15506-
4 C1 Valve 4 15506-
5 702-16-51140 Shim, T=0.30mm 4 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
6 702-16-71350 Spring 4 15506-
7 702-16-53140 Retainer 4 15506-
8 702-16-53470 Spring 2 15506-
9 702-16-53590 Spring 2 15506-
10 702-16-53170 Piston 4 15506-
11 702-16-71150 Seal 4 15506-
12 702-16-71160 Seat 4 15506-
13 702-16-71280 Boot 1 15506-
14 702-16-71141 Plate 1 15506-
15 702-16-71131 Plate 1 15506-
16 01010-80620 Bolt 4 15506-
17 702-16-51240 Joint, Universal 1 15506-
18 702-16-71361 Disc 1 15506-
19 702-16-71441 Nut 1 15506-

Reference:K1110-047015 Page:K020017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001508
1
2
34
5 35
4 3
6
4 36
8

7
6
9
16
33
17
18

26
16
17
18 10
15
27
29 28
31
30

11
12
24
25
32

37 14
13

25
23
22

19
25
21
20

Reference:K1110-047016 Page:K020018

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15506-
2 01643-30823 Washer 4 15506-
3 20Y-62-18910 Plug 1 15506-
4 07000-12018 O-ring 2 15506-
5 20Y-62-18890 Bolt, Joint 1 15506-
6 07000-12015 O-ring 2 15506-
7 02781-0021D Union 4 15506-
8 07002-11423 O-ring 4 15506-
9 02896-11008 O-ring 4 15506-
10 22P-43-13261 Frame 1 15506-
11 01010-D1230 Bolt 4 15506-
12 01643-71232 Washer 4 15506-
13 22U-43-23251 Sheet 1 15506-
14 22U-43-23290 Clip 2 15506-
15 20Y-43-41324 Cover 1 18212-
20Y-43-41323 Cover 1 15506-18211
16 01010-80616 Bolt 4 15506-
17 01643-30623 Washer 4 15506-
18 20Y-43-41290 Collar 4 15506-
19 22P-43-13240 Cover 1 15506-
20 01245-00616 Screw 2 15506-
21 01643-70623 Washer 2 15506-
22 01010-80616 Bolt 1 15506-
23 01643-30623 Washer 1 15506-
24 01435-00616 Bolt 2 15506-
25 20Y-43-41290 Collar 5 15506-
26 22B-43-23251 Cover 1 15506-
27 01245-00616 Screw 2 15506-
28 01643-70623 Washer 2 15506-
29 20Y-43-41290 Collar 2 15506-
Reference:K1110-047016 Page:K020018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, R.H. (#15506-)
Index Code Part Number Description Qty Serial No.
30 01245-00616 Screw 3 15506-
31 01643-70623 Washer 3 15506-
32 09415-02512 Cap 1 15506-
33 208-06-19170 Clip 1 15506-
34 01010-81030 Bolt 1 15506-
35 01643-31032 Washer 1 15506-
36 103-21-21260 Boss 1 15506-
37 21W-43-51130 Seal 1 15506-

Reference:K1110-047016 Page:K020018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001540
9
8

12

6 12
10
5
2
13
3 14
4

11

Reference:K1110-047017 Page:K020019

PC78US-8 S/N 15001-UP


Floor Frame, Starting Switch and Switch (#15001-)
Index Code Part Number Description Qty Serial No.
1 08086-20000 Switch, Starting 1 15001-
2 20Y-43-41740 Plate 1 15001-
3 20Y-43-41750 Washer 3 15001-
4 20Y-43-41790 Washer 1 15001-
5 22U-06-22380 Potentiometer 1 15001-
6 22U-06-22460 Spring 1 15001-
7 20Y-43-41781 Knob 1 18494-
20Y-43-41780 Knob 1 15001-18493
8 20Y-06-42450 Switch, Lamp 1 28942-
A2 20Y-06-42121 Switch, Lamp 1 15001-28941
9 20Y-06-42190 Cover 4 15001-
10 21W-06-51340 Wiring Harness 1 15506-
11 22U-43-23260 Clip 1 15001-
12 04434-51710 Clip 2 15001-
13 01010-81016 Bolt 2 15001-
14 01643-31032 Washer 2 15001-

Reference:K1110-047017 Page:K020019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000768
3

35

36 49
38
19
50 40 48
39 39
34 45
41 43
47
42 26 34
39
46 20
43
34 5 11
52
42 33 7
26 34 13
44
30 10

34 2

21 6 9 8

12 14
37 28
29 15
22
34 16

27
4
27

1 17
24

23
29

25 31

32 51
34
19
18

Reference:K1110-047018 Page:K020020

PC78US-8 S/N 15001-UP


Floor Frame, Air Conditioner Unit (#15506-)
Index Code Part Number Description Qty Serial No.
22B-979-2703 Air Conditioner Assembly 1 28941-
A2 22B-979-2702 Air Conditioner Assembly 1 20782-28940
A2 22B-979-2701 Air Conditioner Assembly 1 15506-20781
1 ND245450-6630 Case 1 15506-
2 ND245450-6640 Case 1 15506-
3 ND245450-6650 Case 1 15506-
4 ND116576-8040 Plate 1 15506-
ND446010-4660 Evaporator Assembly 1 15506-
5 ND446600-1472 Evaporator 1 15506-
6 ND949142-0020 O-ring 1 15506-
7 ND949142-0030 O-ring 1 15506-
8 ND446250-5990 Tube 1 15506-
9 ND447500-2980 Valve 1 19806-
A2 ND447500-2660 Valve 1 15506-19805
10 ND949046-3100 Bolt 1 15506-
11 ND146687-2091 Packing 1 15506-
12 ND146687-2080 Packing 1 15506-
13 ND146687-6350 Packing 1 15506-
14 ND146657-8850 Packing 1 15506-
15 ND949046-3610 Bolt 2 15506-
16 ND445021-3091 Plug 1 28941-
ND445021-3941 Plug 1 15506-28940
17 ND116420-6830 Heater 1 15506-
18 ND116340-8820 Motor Assembly 1 15506-
19 ND949008-0330 Screw, Tapping 4 15506-
20 ND077800-1130 Transistor 1 28941-
ND077800-1040 Transistor 1 15506-28940
21 ND077500-5890 Thermistor Assembly 1 15506-
22 ND246790-2060 Clamp 1 15506-
23 ND077500-0650 Thermistor 1 15506-
Reference:K1110-047018 Page:K020020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Air Conditioner Unit (#15506-)
Index Code Part Number Description Qty Serial No.
24 ND017661-3700 Clamp 1 15506-
25 ND063600-4580 Servo Motor Assembly 1 15506-
26 ND063800-0300 Servo Motor Assembly 2 15506-
27 ND116660-0600 Door 2 15506-
28 ND116740-2290 Door 1 28941-
ND116640-8051 Dumper 1 15506-28940
29 ND116650-9870 Door 2 15506-
30 ND017231-1400 Clamp 1 15506-
31 ND116682-0670 Lever 1 15506-
32 ND116662-8420 Shaft 1 15506-
33 ND017212-1720 Lock 1 15506-
34 ND949001-1730 Screw, Tapping 38 15506-
35 ND146687-6360 Packing 1 15506-
36 ND146687-6370 Packing 1 15506-
37 ND146687-6380 Packing 1 15506-
38 ND145530-1210 Filter, Recirculation Air 1 15506-
39 ND949008-0460 Screw, Tapping 3 15506-
40 ND116576-8050 Plate 1 15506-
41 ND116576-8060 Plate 1 15506-
42 ND116780-4690 Lever 2 15506-
43 ND116780-4700 Lever 2 15506-
44 ND116780-4710 Lever 1 15506-
45 ND116682-7310 Lever 1 15506-
46 ND116782-1370 Lever 1 15506-
47 ND116662-8430 Shaft 1 15506-
48 ND116662-8440 Shaft 1 15506-
49 ND246470-5634 Wiring Harness 1 28941-
ND246470-5631 Wiring Harness 1 15506-28940
50 ND246780-1370 Clamp 1 15506-
51 ND146687-6400 Packing 1 15506-
52 ND017780-3110 Cable 1 15506-

Reference:K1110-047018 Page:K020020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001513
8

9
10
11

1 7
4
2
3

5 6

17 16
20 14
13 15

12

21

17
15
22

20 23

21
16
18
14
19

Reference:K1110-047019 Page:K020021

PC78US-8 S/N 15001-UP


Floor Frame, Air Conditioner Piping (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-80825 Bolt 5 15506-
2 01643-30823 Washer 5 15506-
3 208-979-7540 Collar 5 15506-
4 22P-53-13141 Bracket 1 15506-
5 01010-D0616 Bolt 1 15506-
6 01643-70623 Washer 1 15506-
7 08211-01520 Clip 1 15506-
8 22B-979-2781 Duct 1 15506-
9 01010-80825 Bolt 2 15506-
10 01643-30823 Washer 2 15506-
11 208-979-7540 Collar 2 15506-
12 22P-979-1850 Hose 1 15506-
13 22P-979-1870 Hose 1 15506-
14 21W-979-5111 Hose 1 15506-
15 20Y-979-3150 O-ring 2 15506-
16 21W-979-5121 Hose 1 15506-
17 20Y-979-3130 O-ring 2 15506-
18 208-979-7650 Connector 1 15506-
19 01435-40620 Bolt 1 15506-
20 21W-979-5131 Hose 1 15506-
21 21W-979-5141 Hose 1 15506-
22 09479-02400 Clip 2 15506-
23 08034-20536 Band 1 15506-

Reference:K1110-047019 Page:K020021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001518
30 23 33
29
32
33
21 34 20
34
13 15 17
27 12
15
31 32 25 15 19
8
10 3
16
6
14
18
4

30
32
2 24

13 29
22 21 34
15 34 33 23 33
17
7 6 16
11
5 14 12
9
28 10 19
4 15
26 18
25 8
32 15
31
27

35

Reference:K1110-047020 Page:K020022

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping (#15506-)
Index Code Part Number Description Qty Serial No.
1 22P-62-15151 Hose 1 15506-
2 22P-62-15371 Hose 1 15506-
3 22P-62-15202 Hose Assembly 1 21086-
A1 22P-62-15201 Hose Assembly 1 15506-21085
4 22P-62-15332 Hose 1 21086-
A1 22P-62-15331 Hose 1 15506-21085
5 20U-62-22190 O-ring 1 15506-
6 22P-62-15292 Hose 1 21086-
A1 22P-62-15291 Hose 1 15506-21085
7 20U-62-22190 O-ring 1 15506-
8 22P-62-15232 Hose 1 21086-
A1 22P-62-15231 Hose 1 15506-21085
9 20U-62-22190 O-ring 1 15506-
10 22P-62-15332 Hose 1 21086-
A1 22P-62-15331 Hose 1 15506-21085
11 20U-62-22190 O-ring 1 15506-
12 22P-62-15211 Hose 1 15506-
13 22P-62-15121 Hose 1 15506-
14 20Y-62-22860 Band, Brown 2 15506-
15 20Y-62-22850 Band, Green 6 15506-
16 20Y-62-22830 Band, White 2 15506-
17 20Y-62-22820 Band, Blue 2 15506-
18 21U-62-34740 Band, Orange 2 15506-
19 20Y-62-22790 Band, Red 2 15506-
20 22P-62-15102 Hose Assembly 1 21086-
A1 22P-62-15101 Hose Assembly 1 15506-21085
21 22P-62-15142 Hose 1 21086-
A1 22P-62-15141 Hose 1 15506-21085
22 20U-62-22190 O-ring 1 15506-
23 22P-62-15132 Hose 1 21086-
Reference:K1110-047020 Page:K020022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping (#15506-)
Index Code Part Number Description Qty Serial No.
23 A1 22P-62-15131 Hose 1 15506-21085
24 20U-62-22190 O-ring 1 15506-
25 22P-62-15142 Hose 1 21086-
A1 22P-62-15141 Hose 1 15506-21085
26 20U-62-22190 O-ring 1 15506-
27 22P-62-15282 Hose 1 21086-
A1 22P-62-15281 Hose 1 15506-21085
28 20U-62-22190 O-ring 1 15506-
29 22P-62-15111 Hose 1 15506-
30 22P-62-15191 Hose 1 15506-
31 20Y-62-22840 Band, Black 2 15506-
32 20Y-62-22820 Band, Blue 6 15506-
33 20Y-62-22810 Band, Yellow 4 15506-
34 20Y-62-22790 Band, Red 4 15506-
35 22P-62-15261 Hose 1 15506-

Reference:K1110-047020 Page:K020022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001542
1

13 14
17
15
16
18 2

4
18

7
4
3

4
10
6
7 7 5
10 12
11
9
8

Reference:K1110-047021 Page:K020023

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve Piping Clamp (#15506-)
Index Code Part Number Description Qty Serial No.
1 08034-20536 Band 3 15506-
2 134-03-61410 Band 2 15506-
3 21W-54-42291 Grommet 1 15506-
4 04434-53411 Clip 3 15506-
5 01010-81020 Bolt 3 15506-
6 01643-31032 Washer 3 15506-
7 04434-52711 Clip 3 15506-
8 01010-81020 Bolt 2 15506-
9 01643-31032 Washer 2 15506-
10 04434-52711 Clip 2 15506-
11 01010-81020 Bolt 2 15506-
12 01643-31032 Washer 2 15506-
13 22P-53-13151 Grommet 1 15506-
14 08034-20536 Band 1 15506-
15 208-06-19170 Clip 1 15506-
16 01010-81020 Bolt 1 15506-
17 01643-31032 Washer 1 15506-
18 04435-51510 Clip 2 15506-

Reference:K1110-047021 Page:K020023
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001544

9
20 8 5
17 8
7
8
8
19 6
20
16 9
19 22 1 9
23 8 4
7 8
9
21 19
15 10
20 11
18 3
19 11
19 2
16 8 10
20 4
12 19 9
23 15
22 20
14
13

Reference:K1110-047022 Page:K020024

PC78US-8 S/N 15001-UP


Floor Frame, P-Block and T-Block (#15506-)
Index Code Part Number Description Qty Serial No.
1 21W-62-42351 Block 1 15506-
2 01010-80845 Bolt 2 15506-
3 01643-30823 Washer 2 15506-
4 02781-0021D Union 2 15506-
5 11Y-62-12330 Tee 1 15506-
6 07040-11409 Plug 1 15506-
7 02783-10210 Elbow 2 15506-
8 07002-11423 O-ring 6 15506-
9 02896-11008 O-ring 6 15506-
10 07040-11007 Plug 2 15506-
11 07002-11023 O-ring 2 15506-
12 21W-62-42351 Block 1 15506-
13 01010-80845 Bolt 2 15506-
14 01643-30823 Washer 2 15506-
15 02781-0021D Union 2 15506-
16 11Y-62-12230 Union 2 15506-
17 02782-10210 Elbow 1 15506-
18 11Y-62-12510 Elbow 1 15506-
19 07002-11423 O-ring 6 15506-
20 02896-11008 O-ring 5 15506-
21 02896-11009 O-ring 1 15506-
22 07040-11007 Plug 2 15506-
23 07002-11023 O-ring 2 15506-

Reference:K1110-047022 Page:K020024
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000773

Reference:K1110-047023 Page:K020025

PC78US-8 S/N 15001-UP


Floor Frame, Plug (#15506-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25590 Grommet 1 15506-

Reference:K1110-047023 Page:K020025
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY017767
28 27

23

24

12
18 20
22

16 25 19
26
17
15 13
11
21 29
14

18

17
15
1
2
3
4
6
5
7
10
9
8

Reference:K1110-047024 Page:K020026

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Swing and Attachment (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-04290 Valve, Pilot 1 15506-
1 C1 Valve Body 1 15506-
2 C1 Valve 2 15506-
3 702-16-51140 Shim, T=0.30mm 2 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
4 702-16-54550 Spring, L=22.73mm 2 15506-
5 702-16-54571 Retainer, T=5.9mm 2 15506-
6 702-16-54560 Spring 2 15506-
7 702-16-53170 Piston 2 15506-
8 702-16-51270 Seal 2 15506-
9 702-16-54580 Collar 2 15506-
10 702-16-54590 O-ring 2 15506-
11 C1 Lever 1 15506-
12 C1 Plate 1 15506-
13 C1 Shaft 1 15506-
14 702-16-54641 Boot 1 15506-
15 01252-30625 Bolt 2 15506-
16 702-16-54660 Plate 1 15506-
17 702-16-54650 Plate 2 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
18 702-21-07610 Valve, Solenoid 1 15506-
19 702-21-53680 O-ring 1 15506-
20 702-21-55620 Plug 1 15506-
21 702-21-53330 Screw 2 15506-
22 07002-11423 O-ring 1 15506-
23 700-22-11410 O-ring 2 15506-
24 702-21-39450 O-ring 1 15506-
25 07000-11008 O-ring 1 15506-
26 07000-12012 O-ring 1 15506-
27 C1 Body 1 15506-
Reference:K1110-047024 Page:K020026
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, PPC Valve for Swing and Attachment (#15506-)
Index Code Part Number Description Qty Serial No.
28 01252-60612 Bolt, Hexagon Socket Head 3 15506-
29 203-60-62220 Bolt 2 15506-

Reference:K1110-047024 Page:K020026
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001531
18

6
7 8
5 1
10
9
4

16
17

14

15

22
2 20 21
3 27
2 20
3 19
30 21
29
28
31 26
33
32 20 25
20
23
24
21 21

11
11
13
13 12
12

Reference:K1110-047025 Page:K020027

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Offset Control Pedal (#15506-)
Index Code Part Number Description Qty Serial No.
1 22U-43-21470 Seat 1 15506-
2 01010-81025 Bolt 2 15506-
3 01643-31032 Washer 2 15506-
4 01583-11408 Nut 1 15506-
5 20Y-62-25360 Bracket 1 15565-
22P-43-13620 Bracket 1 15506-15564
6 01010-81025 Bolt 2 15506-
7 01643-31032 Washer 2 15506-
8 22B-43-23730 Pedal 1 15506-
9 01010-D1045 Bolt 2 15506-
10 01643-71032 Washer 2 15506-
11 22B-43-23620 Plate 2 15506-
12 01010-81020 Bolt 4 15506-
13 01643-31032 Washer 4 15506-
22P-43-13691 Plate 1 15506-
14 C1 Plate 1 15506-
15 22B-43-23650 Sheet 1 15506-
16 01010-81020 Bolt 2 15506-
17 01643-31032 Washer 2 15506-
18 207-43-81240 Cap 1 15506-
19 21W-62-43980 Elbow 1 15506-
20 07000-12011 O-ring 4 15506-
21 02896-11008 O-ring 4 15506-
22 21W-62-43990 Elbow 1 15506-
23 21W-62-41780 Nipple 1 15506-
24 11Y-62-12140 Nipple 1 15506-
25 21W-62-51910 Hose 1 15506-
26 21W-62-51920 Hose 1 15506-
27 04434-51010 Clip 1 15506-
28 01010-81020 Bolt 1 15506-
Reference:K1110-047025 Page:K020027
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Work Equipment Offset Control Pedal (#15506-)
Index Code Part Number Description Qty Serial No.
29 01643-31032 Washer 1 15506-
30 20Y-01-21260 Spacer 1 15506-
31 04434-50610 Clip 1 15506-
32 01010-81040 Bolt 1 15506-
33 01643-31032 Washer 1 15506-

Reference:K1110-047025 Page:K020027
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
@@5X114@
12
18

16
17
15
13
11

14

17 2
15
3
4

5
7

10
9
8

Reference:K1110-047026 Page:K020028

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Blade (#15506-)
Index Code Part Number Description Qty Serial No.
702-16-01270 Valve Assembly, PPC 1 15872-
702-16-01600 Valve Assembly, PPC 1 15506-15871
1 C1 Body 1 15506-
2 C1 Valve 2 15506-
3 702-16-51140 Shim, T=0.30mm 2 15506-
702-16-54670 Shim, T=0.20mm 2 15506-
4 702-16-54550 Spring, L=22.73mm 2 15506-
5 702-16-54571 Retainer, T=5.9mm 2 15506-
6 702-16-54560 Spring 2 15872-
702-16-54160 Spring 2 15506-15871
7 702-16-53170 Piston 2 15506-
8 702-16-51270 Seal 2 15506-
9 702-16-54580 Collar 2 15506-
10 702-16-54590 O-ring 2 15506-
11 C1 Lever 1 15506-
12 C1 Plate 1 15506-
13 C1 Shaft 1 15506-
14 702-16-54641 Boot 1 15506-
15 01252-30625 Bolt 2 15872-
01252-60625 Bolt 2 15506-15871
16 702-16-54660 Plate 1 15506-
17 702-16-54650 Plate 2 15506-
702-16-54670 Shim, T=0.20mm 4 15506-
18 702-16-54880 Filter 1 15506-

Reference:K1110-047026 Page:K020028
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA018048
11

12

7 6 24
8 23 21

10 9
1
20
2
19 25
17 22
18
20
21
14
13 24 25
23 22
16

15

27 26

4
5 3

Reference:K1110-047027 Page:K020029

PC78US-8 S/N 15001-UP


Floor Frame, Blade Control Lever (#15506-)
Index Code Part Number Description Qty Serial No.
1 01010-D1025 Bolt 2 15506-
2 01643-71032 Washer 2 15506-
3 22P-43-13310 Bracket 1 15506-
4 01010-81040 Bolt 2 15506-
5 01643-31032 Washer 2 15506-
6 22B-43-33181 Lever 1 28941-
A2 22B-43-33180 Lever 1 19769-28940
A2 22P-43-13330 Lever 1 15506-19768
7 01010-D0825 Bolt 2 15506-
8 01643-70823 Washer 2 15506-
9 01583-11408 Nut 1 15506-
10 22U-43-21730 Seat 1 15506-
11 20T-43-71110 Knob 1 15506-
12 20T-43-71190 Nut 1 15506-
13 21W-62-42370 Elbow 1 15506-
14 07000-12011 O-ring 1 15506-
15 21W-62-42370 Elbow 1 15506-
16 07000-12011 O-ring 1 15506-
17 11Y-62-12140 Nipple 2 15506-
18 07000-12011 O-ring 2 15506-
19 02896-11008 O-ring 2 15506-
20 02760-00215 Hose, Face Seal Type, Red 1 15506-
21 21W-62-53360 Hose 1 15506-
22 20Y-62-22850 Band, Green 2 15506-
23 20Y-62-22830 Band, White 2 15506-
24 20Y-62-22820 Band, Blue 2 15506-
25 20Y-62-22790 Band, Red 2 15506-
26 22B-43-23580 Sheet 1 15506-
27 22B-54-16461 Rivet 2 15506-

Reference:K1110-047027 Page:K020029
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, With Blade, AM-FM Radio, North America
FIG. Name FIG. No.
Floor Frame, Floor, Frame K1110-013001
Floor Frame, PPC Valve for Travel K1110-013002
Floor Frame, Travel Lever and Travel Pedal K1110-013003
Floor Frame, Floor, Footrest, L.H. K1110-013004
Floor Frame, Floor, Base K1110-013005
Floor Frame, Wiring Harness K1110-013006
Floor Frame, Electric Parts K1110-013007
Floor Frame, Wiring Harness Clamp, Floor Frame K1110-013008
Floor Frame, Work Equipment Lever L.H. K1110-013009
Floor Frame, PPC Valve for Work Equipment, L.H. K1110-013010
Floor Frame, Console Box, L.H. (#15001-16168) K1110-013011
Floor Frame, Console Box, L.H. (#16169-) K1110-013011A
Floor Frame, Radio K1110-013012
Floor Frame, Work Equipment Lock Lever K1110-013013
Floor Frame, Work Equipment Control Lever, R.H. K1110-013014
Floor Frame, PPC Valve for Work Equipment, R.H. K1110-013015
Floor Frame, Console Box, R.H. K1110-013016
Floor Frame, Starting Switch and Switch K1110-013017
Floor Frame, Air Conditioner Unit K1110-013018
Floor Frame, Air Conditioner Piping K1110-013019
Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping K1110-013020
Floor Frame, PPC Valve Piping Clamp K1110-013021
Floor Frame, P-Block and T-Block K1110-013022
Floor Frame, Plug K1110-013023
Floor Frame, Floor, Footrest, R.H. K1110-013024
Floor Frame, PPC Valve for Blade K1110-013025
Floor Frame, Blade Control Lever K1110-013026

Reference:X22-1039300 Page:K021000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001565
6
3
5 7
4

2
10
11
12
11 13
12
13

Reference:K1110-013001 Page:K021001

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Frame (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-53-13111 Floor 1 15001-
2 22P-53-13121 Plate 1 15001-
3 01010-81016 Bolt 2 15001-
4 01643-31032 Washer 2 15001-
5 22P-53-13130 Plate 1 15001-
6 01010-81016 Bolt 2 15001-
7 01643-31032 Washer 2 15001-
8 07286-03833 Hose 1 15001-
9 07280-04726 Clamp 1 15001-
10 22U-54-25581 Grommet 1 15001-
11 01010-81020 Bolt 4 15001-
12 01643-31032 Washer 4 15001-
13 01643-31032 Washer 4 15001-

Reference:K1110-013001 Page:K021001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY010653
25

23

31
29
30
2 28
3 27
4
6
5
7 26
9 23
8
31
29
30
28
27

18

24
11
19
13
10
22
21
11
12 20
19 18
15
14 17
16
19
20

12
21
22

Reference:K1110-013002 Page:K021002

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Travel (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-04271 Valve Assembly, PPC 1 21285-
702-16-04270 Valve Assembly, PPC 1 15001-21284
1 C1 Valve Body 1 15001-
2 C1 Valve 4 21285-
C1 Valve 4 15001-21284
3 702-16-51140 Shim, T=0.30mm 4 15001-
4 702-16-53420 Spring 4 15001-
5 702-16-53140 Retainer 4 15001-
6 702-16-54420 Spring 4 15001-
7 702-16-53170 Piston 4 15001-
8 702-16-71150 Seal 4 15001-
9 702-16-71160 Seat 4 15001-
10 C1 Case 1 15001-
11 C1 Lever 2 15001-
12 C1 Shaft 2 15001-
13 702-16-73640 Plate 1 15001-
14 01010-80855 Bolt 2 15001-
15 01643-30823 Washer 2 15001-
16 01010-80820 Bolt 4 21285-
01010-80816 Bolt 4 15001-21284
17 702-16-54331 Washer, T=1.60mm 4 15001-
702-16-54341 Washer, T=1.30mm 4 15001-
702-16-54351 Washer, T=1.00mm 4 15001-
702-16-56380 Washer, T=1.90mm 4 15001-
702-16-56390 Washer, T=2.20mm 4 15001-
18 C1 Pin, Spring 2 15001-
19 C1 Bushing 4 15001-
20 C1 O-ring 2 15001-
21 702-16-73610 Damper Assembly 2 15001-
22 01023-10306 Screw 4 15001-
Reference:K1110-013002 Page:K021002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, PPC Valve for Travel (#15001-)
Index Code Part Number Description Qty Serial No.
23 C1 Pin 2 15001-
24 04022-04016 Pin, Dowel 2 15001-
25 C1 Plug 2 15001-
26 C1 Plug 2 15001-
27 07040-11209 Plug 3 15001-
28 07002-11223 O-ring 3 15001-
29 C1 Ball 3 15001-
30 C1 Plug 3 15001-
31 C1 Seat 3 15001-

Reference:K1110-013002 Page:K021002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000753
19 20
11
12
18
10 17

16
13
5 17
14
6
3
4 15

10
8 12
11
9 21
27
22 7 28
1
23
14
2 13

25
24
30 26
29
30
30
29 33
30 34
31 30
34 29
30
32
34

Reference:K1110-013003 Page:K021003

PC78US-8 S/N 15001-UP


Floor Frame, Travel Lever and Travel Pedal (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81020 Bolt 2 15001-
2 01643-31032 Washer 2 15001-
3 20Y-43-41361 Collar 4 15001-
4 20Y-43-41121 Cover 1 15001-
5 01010-81020 Bolt 4 15001-
6 01643-31032 Washer 4 15001-
7 203-43-51620 Spring 2 15001-
22U-43-21350 Cover Assembly 2 15001-
8 C1 Cover 1 15001-
9 22U-43-21360 Seal 1 15001-
10 20Y-43-41111 Lever 2 15001-
11 01010-D1045 Bolt 4 15001-
12 01643-71032 Washer 4 15001-
13 01010-81030 Bolt 4 15001-
14 01643-31032 Washer 4 15001-
15 22U-43-21111 Pedal 1 15001-
16 22U-43-21121 Pedal 1 15001-
17 21W-43-41441 Lever 2 15001-
18 20Y-43-21231 Knob 1 15001-
19 20Y-43-21241 Knob 1 15001-
20 01023-20416 Screw 2 15001-
21 7861-93-1840 Sensor, Pressure 1 15001-
07000-12011 O-ring 1 15001-
22 20Y-62-18910 Plug 1 15001-
23 07000-12018 O-ring 2 15001-
24 02781-00210 Union 1 15001-
25 07002-11423 O-ring 1 15001-
26 02896-11008 O-ring 1 15001-
27 22P-62-15270 Nipple 1 15001-
28 07002-11423 O-ring 1 15001-
Reference:K1110-013003 Page:K021003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Travel Lever and Travel Pedal (#15001-)
Index Code Part Number Description Qty Serial No.
29 21W-62-44640 Joint 4 15001-
30 07000-12015 O-ring 8 15001-
31 21W-62-44650 Union 1 15001-
32 21W-62-44660 Union 2 15001-
33 21W-62-44670 Union 1 15001-
34 02896-11008 O-ring 4 15001-

Reference:K1110-013003 Page:K021003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000754
3
4
1

5
6
2

Reference:K1110-013004 Page:K021004

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Footrest, L.H. (#15001-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25110 Footrest 1 15001-
2 22P-43-13680 Plate 1 15001-
3 01010-81025 Bolt 2 15001-
4 01643-31032 Washer 2 15001-
5 01010-81020 Bolt 1 15001-
6 01643-31032 Washer 1 15001-

Reference:K1110-013004 Page:K021004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000755
12

6 5
14
4
13

14 16
8 15
13 17

2 10
18
3
11
9

Reference:K1110-013005 Page:K021005

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Base (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-43-13442 Bracket 1 15001-
2 01010-D1235 Bolt 6 15001-
3 01643-71232 Washer 6 15001-
4 22M-43-21220 Adjuster 1 15001-
5 01252-80816 Bolt 3 15001-
6 22M-43-21230 Adjuster 1 15001-
7 01252-80816 Bolt 3 15001-
8 22P-43-13371 Pipe 1 15001-
9 22P-43-13351 Stopper 1 15001-
10 01010-D1020 Bolt 2 15001-
11 01643-71032 Washer 2 15001-
12 22P-43-13461 Frame 1 15001-
13 01252-80825 Bolt 6 15001-
14 01643-80823 Washer 6 15525-
01643-70823 Washer 6 15001-15524
15 21W-43-56130 Cover 1 15703-
22B-43-23461 Cover 1 15001-15702
16 01010-81020 Bolt 2 15001-
17 01643-31032 Washer 2 15001-
18 22B-43-23590 Trim 1 15001-

Reference:K1110-013005 Page:K021005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA009670
5 3
24 6 5
1 25 5 2
3 4
26 5
2 6
6 5
6 3
5

14

15 28
17 27
16
30
20
29
19
18

8 9

7
12 13
8 9

8 9
10 11
1

32
21
23 31
22

Reference:K1110-013006 Page:K021006

PC78US-8 S/N 15001-UP


Floor Frame, Wiring Harness (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-06-51114 Wiring Harness 1 15872-
21W-06-51113 Wiring Harness 1 15001-15871
2 08041-03000 Fuse, 30Amp. 2 15001-
3 08041-02000 Fuse, 20Amp. 3 15001-
4 08041-01500 Fuse, 15Amp. 1 15001-
5 08041-01000 Fuse, 10Amp. 9 15001-
6 08041-00500 Fuse, 5Amp. 5 15001-
7 20T-06-81230 Fusible Link, 45Amp. 2 15001-
8 HM6440-0129 F-Connector, Pink 5 15001-
9 HM6440-0128 M-Connector, Pink 5 15001-
10 HM6400-0013 F-Connector, Green 1 15001-
11 HM6409-0072 M-Connector, Green 1 15001-
12 HM6400-0012 F-Connector, Black 1 15001-
13 HM6409-0071 M-Connector, Black 1 15001-
14 22P-06-11840 Bracket 1 15001-
15 600-815-2170 Switch, Heater, Ribbon Heater Relay 1 15001-
16 01010-80616 Bolt 2 15001-
17 01643-30623 Washer 2 15001-
18 01010-80816 Bolt 2 15001-
19 01643-30823 Washer 2 15001-
20 04434-50610 Clip 1 15001-
21 04434-51910 Clip 1 15001-
22 01010-81020 Bolt 1 15001-
23 01643-31032 Washer 1 15001-
24 08038-02027 Cap 1 15001-
25 08038-04030 Cap 1 15001-
26 08038-00519 Cap 1 15001-
27 01010-81020 Bolt 3 15001-
28 01643-31032 Washer 3 15001-
29 01010-80816 Bolt 1 15001-
Reference:K1110-013006 Page:K021006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Wiring Harness (#15001-)
Index Code Part Number Description Qty Serial No.
30 01643-30823 Washer 1 15001-
31 22B-54-23221 Grommet 1 15001-
32 08034-20536 Band 1 15001-

Reference:K1110-013006 Page:K021006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000757
3
4

2 1

16
6
7
17
5
17
21 22
23
25
23 24 8
22 21
21

19
20 11
18
15

10

14
13
14 13
12 12

Reference:K1110-013007 Page:K021007

PC78US-8 S/N 15001-UP


Floor Frame, Electric Parts (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-06-11432 Bracket 1 19304-
A2 22P-06-11431 Bracket 1 15001-19303
2 7835-46-7002 Controller 1 15872-
7835-46-7001 Controller 1 15001-15871
3 01010-80820 Bolt 4 15001-
4 01643-30823 Washer 4 15001-
5 7861-94-3000 Resistor 1 15001-
6 01010-80816 Bolt 2 15001-
7 01643-30823 Washer 2 15001-
8 22B-06-21430 Wiring Harness 1 15001-
9 208-43-71420 Cap 2 15001-
10 08211-01920 Clip 1 15001-
11 08211-01020 Clip 1 15001-
12 04434-52711 Clip 2 15001-
13 01010-80816 Bolt 2 15001-
14 01643-30823 Washer 2 15001-
15 01023-10620 Screw 2 15001-
16 22P-06-11370 Sheet 1 15001-
17 22U-43-23290 Clip 3 15001-
18 04434-51908 Clip 1 15001-
19 01010-80816 Bolt 1 15001-
20 01643-30823 Washer 1 15001-
21 7861-74-5100 Relay 7 15001-
22 01010-80612 Bolt 8 15001-
23 01643-30623 Washer 8 15001-
24 8233-06-3350 Diode 3 15001-
25 421-07-31270 Relay 2 15001-

Reference:K1110-013007 Page:K021007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001477

12 2
11 7
14 8
13 18 22 15
26
21
28
23 4
27 17 3
18
16
25 10
20 6
24 9
21 19 5

Reference:K1110-013008 Page:K021008

PC78US-8 S/N 15001-UP


Floor Frame, Wiring Harness Clamp, Floor Frame (#15001-)
Index Code Part Number Description Qty Serial No.
1 08211-01520 Clip 1 15001-
2 04434-53411 Clip 1 15001-
3 01010-81025 Bolt 1 15001-
4 01643-31032 Washer 1 15001-
5 01010-80816 Bolt 2 15001-
6 01643-30823 Washer 2 15001-
7 04434-52711 Clip 1 15001-
8 07095-20420 Cushion 1 15001-
9 01010-81020 Bolt 1 15001-
10 01643-31032 Washer 1 15001-
11 155-61-15350 Clip 1 15001-
12 22M-62-13660 Cushion 1 15001-
13 01010-81020 Bolt 1 15001-
14 01643-31032 Washer 1 15001-
15 04434-53411 Clip 1 15001-
16 01010-81020 Bolt 1 15001-
17 01643-31032 Washer 1 15001-
18 04434-53411 Clip 2 15001-
19 01010-81020 Bolt 2 15001-
20 01643-31032 Washer 2 15001-
21 08211-00720 Clip 2 15001-
22 08211-01020 Clip 1 15001-
23 04434-51010 Clip 1 15001-
24 01010-81020 Bolt 1 15001-
25 01643-31032 Washer 1 15001-
26 08193-20010 Clip 1 15001-
27 01010-81020 Bolt 1 15001-
28 01643-31032 Washer 1 15001-

Reference:K1110-013008 Page:K021008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001494

9
1 8
5

Reference:K1110-013009 Page:K021009

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Lever L.H. (#15001-)
Index Code Part Number Description Qty Serial No.
20Y-43-22611 Lever Assembly 1 15001-
1 20Y-43-22211 Lever 1 15001-
20Y-43-22621 Knob 1 15001-
2 20Y-43-22630 Knob 1 15001-
3 20Y-43-22421 Insert 1 15001-
4 20Y-43-22250 Plate 1 15001-
5 20Y-43-22261 Boot 1 15001-
6 20Y-43-22370 Boot 1 15001-
7 600-411-1280 Nut 1 15001-
8 01252-41025 Bolt 1 15001-
9 01643-51032 Washer 1 15001-

Reference:K1110-013009 Page:K021009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011336
19

13

18

16
17

15

14

11
11 12

12
10
10 7
7
8
9
6
6 5
5
4
4
1

2
3

Reference:K1110-013010 Page:K021010

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Work Equipment, L.H. (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-04510 Valve, Pilot 1 15001-
1 C1 Body, Valve 1 15001-
2 C1 Plug 2 15001-
3 C1 Plug 2 15001-
4 C1 Valve 4 15001-
5 702-16-51140 Shim, T=0.30mm 4 15001-
702-16-54670 Shim, T=0.20mm 4 15001-
6 702-16-71350 Spring 4 15001-
7 702-16-53140 Retainer 4 15001-
8 702-16-53470 Spring 2 15001-
9 702-16-53590 Spring 2 15001-
10 702-16-53170 Piston 4 15001-
11 702-16-71150 Seal 4 15001-
12 702-16-71160 Seat 4 15001-
13 702-16-71280 Boot 1 15001-
14 702-16-71141 Plate 1 15001-
15 702-16-71131 Plate 1 15001-
16 01010-80620 Bolt 4 15001-
17 702-16-51240 Joint, Universal 1 15001-
18 702-16-71361 Disc 1 15001-
19 702-16-71441 Nut 1 15001-

Reference:K1110-013010 Page:K021010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000762

5 37
4 3 36
6 39
27
29 1 38
20 2 8
7
20 17 4 56
9
20 40
13 52
41 51 54 53
21 13 26
42
28 19
29 18 43 33

34 13
15
35 16
25
22 24 10
23 14 57

12 57
11 33
50
49
33
30
33
45
31 46
32 50 44

55
50
48
47

Reference:K1110-013011 Page:K021011

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, L.H. (#15001-16168)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15001-@
2 01643-30823 Washer 4 15001-@
3 20Y-62-18910 Plug 1 15001-@
4 07000-12018 O-ring 2 15001-@
5 20Y-62-18890 Bolt, Joint 1 15001-@
6 07000-12015 O-ring 2 15001-@
7 02781-0021D Union 4 15001-@
8 07002-11423 O-ring 4 15001-@
9 02896-11008 O-ring 4 15001-@
10 22B-43-23112 Frame 1 15001-@
11 01010-D1030 Bolt 4 15001-@
12 01643-71032 Washer 4 15001-@
13 06124-01616 Bearing 4 15001-@
14 22B-43-23721 Bracket 1 15001-@
15 22B-43-23161 Shaft 1 15001-@
16 01435-00612 Bolt 1 15001-@
17 22B-43-23471 Spring 1 15001-@
18 04050-12015 Pin, Cotter 1 15001-@
19 01640-20816 Washer 1 15001-@
20 426-925-3981 Washer 3 15001-@
21 22B-43-23142 Guide 1 15001-@
22 04205-30832 Pin 2 15001-@
23 21U-43-32430 Collar 2 15001-@
24 04050-12015 Pin, Cotter 2 15001-@
25 01640-20816 Washer 2 15001-@
26 21U-43-32380 Spring, Gas 1 15001-@
27 04050-12015 Pin, Cotter 1 15001-@
28 04050-13015 Pin, Cotter 1 15001-@
29 01640-20816 Washer 2 15001-@
30 22B-06-21420 Switch, Work Equipment Lock 1 15001-@
Reference:K1110-013011 Page:K021011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, L.H. (#15001-16168)
Index Code Part Number Description Qty Serial No.
31 22U-06-22490 Plate 1 15001-@
32 01023-60320 Screw 2 15001-@
33 08059-00310 Clip 4 15001-16168
34 20Y-54-11611 Stopper 1 15001-@
35 01580-11008 Nut 1 15001-@
36 208-06-19170 Clip 1 15001-@
37 04434-51410 Clip 1 15001-@
38 01010-81025 Bolt 1 15001-@
39 01643-31032 Washer 1 15001-@
40 22B-43-23213 Cover 1 15001-@
41 01010-80616 Bolt 4 15001-@
42 01643-30623 Washer 4 15001-@
43 20Y-43-41290 Collar 4 15001-@
44 22B-43-23221 Cover 1 15001-@
45 01245-00616 Screw 2 15001-@
46 01643-70623 Washer 2 15001-@
47 01010-80616 Bolt 1 15001-@
48 01643-30623 Washer 1 15001-@
49 01435-00616 Bolt 4 15001-@
50 20Y-43-41290 Collar 7 15001-@
51 22B-43-23231 Cover 1 15001-@
52 01245-00616 Screw 2 15001-@
53 01643-70623 Washer 2 15001-@
54 20Y-43-41290 Collar 2 15001-@
55 22B-43-23271 Cover 1 15001-@
56 08059-00515 Clip 1 15001-16168
57 22B-43-23280 Seal 2 15001-@

Reference:K1110-013011 Page:K021011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006698

5 37
4 3 36
6 39
27
29 1 38
20 2 8
7
20 17 4
9 56
20
40
13 52
41 51 54 53
21 13 26
42
28 19
29 18 43 56

34 13
15
35 16
25
22 24 10
23 14 57

12 57
11
33
50
49
33
30
33
45
31 46
32 50 44

55
50
48
47

Reference:K1110-013011A Page:K021012

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, L.H. (#16169-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15001-
2 01643-30823 Washer 4 15001-
3 20Y-62-18910 Plug 1 15001-
4 07000-12018 O-ring 2 15001-
5 20Y-62-18890 Bolt, Joint 1 15001-
6 07000-12015 O-ring 2 15001-
7 02781-0021D Union 4 15001-
8 07002-11423 O-ring 4 15001-
9 02896-11008 O-ring 4 15001-
10 22B-43-23112 Frame 1 15001-
11 01010-D1030 Bolt 4 15001-
12 01643-71032 Washer 4 15001-
13 06124-01616 Bearing 4 15001-
14 22B-43-23722 Bracket 1 19440-
A2 22B-43-23721 Bracket 1 15001-19439
15 22B-43-23161 Shaft 1 15001-
16 01435-00612 Bolt 1 15001-
17 22B-43-23471 Spring 1 15001-
18 04050-12015 Pin, Cotter 1 15001-
19 01640-20816 Washer 1 15001-
20 426-925-3981 Washer 3 15001-
21 22B-43-23143 Guide 1 19440-
A2 22B-43-23142 Guide 1 15001-19439
22 04205-30835 Pin 2 15001-
23 21U-43-32430 Collar 2 15001-
24 04050-12015 Pin, Cotter 2 15001-
25 01640-20816 Washer 2 15001-
26 21U-43-32380 Spring, Gas 1 15001-
27 04050-12015 Pin, Cotter 1 15001-
28 04050-13015 Pin, Cotter 1 15001-
Reference:K1110-013011A Page:K021012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, L.H. (#16169-)
Index Code Part Number Description Qty Serial No.
29 01640-20816 Washer 2 15001-
30 22B-06-21420 Switch, Work Equipment Lock 1 15001-
31 22U-06-22490 Plate 1 15001-
32 01023-60320 Screw 2 15001-
33 08059-00310 Clip 3 16169-
34 20Y-54-11611 Stopper 1 15001-
35 01580-11008 Nut 1 15001-
36 208-06-19170 Clip 1 15001-
37 04434-51410 Clip 1 15001-
38 01010-81025 Bolt 1 15001-
39 01643-31032 Washer 1 15001-
40 22B-43-23213 Cover 1 15001-
41 01010-80616 Bolt 4 15001-
42 01643-30623 Washer 4 15001-
43 20Y-43-41290 Collar 4 15001-
44 22B-43-23221 Cover 1 15001-
45 01245-00616 Screw 2 15001-
46 01643-70623 Washer 2 15001-
47 01010-80616 Bolt 1 15001-
48 01643-30623 Washer 1 15001-
49 01435-00616 Bolt 4 15001-
50 20Y-43-41290 Collar 7 15001-
51 22B-43-23231 Cover 1 15001-
52 01245-00616 Screw 2 15001-
53 01643-70623 Washer 2 15001-
54 20Y-43-41290 Collar 2 15001-
55 22B-43-23271 Cover 1 15001-
56 08059-00515 Clip 2 16169-
57 22B-43-23280 Seal 2 15001-

Reference:K1110-013011A Page:K021012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001502
4 3
16
5
1 2
13
10 15
4
5 11
17
2 9
3

14
8
6 7
14

12

Reference:K1110-013012 Page:K021013

PC78US-8 S/N 15001-UP


Floor Frame, Radio (#15001-)
Index Code Part Number Description Qty Serial No.
1 20Y-06-42440 Radio 1 15893-
A2 20Y-06-41248 Radio 1 15001-15892
2 20Y-43-41482 Plate 2 15001-
3 01023-60510 Screw 6 15001-
4 01010-80616 Bolt 4 15001-
5 01643-30623 Washer 4 15001-
6 22B-43-23171 Bracket 1 15001-
7 01010-80616 Bolt 2 15001-
8 01643-30623 Washer 2 15001-
9 22B-43-23181 Bracket 1 15001-
10 01010-80616 Bolt 2 15001-
11 01643-30623 Washer 2 15001-
12 21W-06-51271 Wiring Harness 1 16169-
A2 21W-06-51270 Wiring Harness 1 15001-16168
13 08034-20414 Band, Black 2 15001-
14 08034-20519 Band 2 15001-
15 22B-54-28990 Sheet 1 15001-
16 20Y-06-41830 Wiring Harness 1 15001-
17 08912-51600 Cord 1 15001-

Reference:K1110-013012 Page:K021013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000764

2 1

Reference:K1110-013013 Page:K021014

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Lock Lever (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-43-13111 Lever 1 15001-
2 22U-43-22490 Knob 1 15001-
3 20T-43-71280 Pin 1 15001-

Reference:K1110-013013 Page:K021014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA022737
3

7
4

10
11
1
12

Reference:K1110-013014 Page:K021015

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Control Lever, R.H. (#15001-)
Index Code Part Number Description Qty Serial No.
22U-43-21172 Lever Assembly 1 15001-
1 20Y-43-22221 Lever 1 15001-
22U-43-21192 Knob 1 15001-
2 C1 Screw 1 15001-
3 20Y-43-22390 Knob 1 15001-
4 20Y-43-22421 Insert 1 15001-
5 22U-43-21211 Switch 1 15001-
6 20Y-43-22250 Plate 1 15001-
7 20Y-43-22261 Boot 1 15001-
8 20Y-43-22370 Boot 1 15001-
9 600-411-1280 Nut 1 15001-
10 01252-41025 Bolt 1 15001-
11 01643-51032 Washer 1 15001-
12 08034-40521 Band 1 15001-

Reference:K1110-013014 Page:K021015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011336
19

13

18

16
17

15

14

11
11 12

12
10
10 7
7
8
9
6
6 5
5
4
4
1

2
3

Reference:K1110-013015 Page:K021016

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Work Equipment, R.H. (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-04510 Valve, Pilot 1 15001-
1 C1 Body, Valve 1 15001-
2 C1 Plug 2 15001-
3 C1 Plug 2 15001-
4 C1 Valve 4 15001-
5 702-16-51140 Shim, T=0.30mm 4 15001-
702-16-54670 Shim, T=0.20mm 4 15001-
6 702-16-71350 Spring 4 15001-
7 702-16-53140 Retainer 4 15001-
8 702-16-53470 Spring 2 15001-
9 702-16-53590 Spring 2 15001-
10 702-16-53170 Piston 4 15001-
11 702-16-71150 Seal 4 15001-
12 702-16-71160 Seat 4 15001-
13 702-16-71280 Boot 1 15001-
14 702-16-71141 Plate 1 15001-
15 702-16-71131 Plate 1 15001-
16 01010-80620 Bolt 4 15001-
17 702-16-51240 Joint, Universal 1 15001-
18 702-16-71361 Disc 1 15001-
19 702-16-71441 Nut 1 15001-

Reference:K1110-013015 Page:K021016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001508
1
2
34
5 35
4 3
6
4 36
8

7
6
9
16
33
17
18

26
16
17
18 10
15
27
29 28
31
30

11
12
24
25
32

37 14
13

25
23
22

19
25
21
20

Reference:K1110-013016 Page:K021017

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, R.H. (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15001-
2 01643-30823 Washer 4 15001-
3 20Y-62-18910 Plug 1 15001-
4 07000-12018 O-ring 2 15001-
5 20Y-62-18890 Bolt, Joint 1 15001-
6 07000-12015 O-ring 2 15001-
7 02781-0021D Union 4 15001-
8 07002-11423 O-ring 4 15001-
9 02896-11008 O-ring 4 15001-
10 22P-43-13261 Frame 1 15001-
11 01010-D1230 Bolt 4 15001-
12 01643-71232 Washer 4 15001-
13 22U-43-23251 Sheet 1 15001-
14 22U-43-23290 Clip 2 15001-
15 20Y-43-41324 Cover 1 18212-
20Y-43-41323 Cover 1 15001-18211
16 01010-80616 Bolt 4 15001-
17 01643-30623 Washer 4 15001-
18 20Y-43-41290 Collar 4 15001-
19 22P-43-13240 Cover 1 15001-
20 01245-00616 Screw 2 15001-
21 01643-70623 Washer 2 15001-
22 01010-80616 Bolt 1 15001-
23 01643-30623 Washer 1 15001-
24 01435-00616 Bolt 2 15001-
25 20Y-43-41290 Collar 5 15001-
26 22B-43-23251 Cover 1 15001-
27 01245-00616 Screw 2 15001-
28 01643-70623 Washer 2 15001-
29 20Y-43-41290 Collar 2 15001-
Reference:K1110-013016 Page:K021017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, R.H. (#15001-)
Index Code Part Number Description Qty Serial No.
30 01245-00616 Screw 3 15001-
31 01643-70623 Washer 3 15001-
32 09415-02512 Cap 1 15001-
33 208-06-19170 Clip 1 15001-
34 01010-81030 Bolt 1 15001-
35 01643-31032 Washer 1 15001-
36 103-21-21260 Boss 1 15001-
37 21W-43-51130 Seal 1 15001-

Reference:K1110-013016 Page:K021017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001540
9
8

12

6 12
10
5
2
13
3 14
4

11

Reference:K1110-013017 Page:K021018

PC78US-8 S/N 15001-UP


Floor Frame, Starting Switch and Switch (#15001-)
Index Code Part Number Description Qty Serial No.
1 08086-20000 Switch, Starting 1 15001-
2 20Y-43-41740 Plate 1 15001-
3 20Y-43-41750 Washer 3 15001-
4 20Y-43-41790 Washer 1 15001-
5 22U-06-22380 Potentiometer 1 15001-
6 22U-06-22460 Spring 1 15001-
7 20Y-43-41781 Knob 1 18494-
20Y-43-41780 Knob 1 15001-18493
8 20Y-06-42450 Switch, Lamp 1 28942-
A2 20Y-06-42121 Switch, Lamp 1 15001-28941
9 20Y-06-42190 Cover 4 15001-
10 21W-06-51240 Wiring Harness 1 15001-
11 22U-43-23260 Clip 1 15001-
12 04434-51710 Clip 2 15001-
13 01010-81016 Bolt 2 15001-
14 01643-31032 Washer 2 15001-

Reference:K1110-013017 Page:K021018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000768
3

35

36 49
38
19
50 40 48
39 39
34 45
41 43
47
42 26 34
39
46 20
43
34 5 11
52
42 33 7
26 34 13
44
30 10

34 2

21 6 9 8

12 14
37 28
29 15
22
34 16

27
4
27

1 17
24

23
29

25 31

32 51
34
19
18

Reference:K1110-013018 Page:K021019

PC78US-8 S/N 15001-UP


Floor Frame, Air Conditioner Unit (#15001-)
Index Code Part Number Description Qty Serial No.
22B-979-2703 Air Conditioner Assembly 1 28941-
A2 22B-979-2702 Air Conditioner Assembly 1 20782-28940
A2 22B-979-2701 Air Conditioner Assembly 1 15001-20781
1 ND245450-6630 Case 1 15001-
2 ND245450-6640 Case 1 15001-
3 ND245450-6650 Case 1 15001-
4 ND116576-8040 Plate 1 15001-
ND446010-4660 Evaporator Assembly 1 15001-
5 ND446600-1472 Evaporator 1 15001-
6 ND949142-0020 O-ring 1 15001-
7 ND949142-0030 O-ring 1 15001-
8 ND446250-5990 Tube 1 15001-
9 ND447500-2980 Valve 1 19806-
A2 ND447500-2660 Valve 1 15001-19805
10 ND949046-3100 Bolt 1 15001-
11 ND146687-2091 Packing 1 15001-
12 ND146687-2080 Packing 1 15001-
13 ND146687-6350 Packing 1 15001-
14 ND146657-8850 Packing 1 15001-
15 ND949046-3610 Bolt 2 15001-
16 ND445021-3091 Plug 1 28941-
ND445021-3941 Plug 1 15001-28940
17 ND116420-6830 Heater 1 15001-
18 ND116340-8820 Motor Assembly 1 15001-
19 ND949008-0330 Screw, Tapping 4 15001-
20 ND077800-1130 Transistor 1 28941-
ND077800-1040 Transistor 1 15001-28940
21 ND077500-5890 Thermistor Assembly 1 15001-
22 ND246790-2060 Clamp 1 15001-
23 ND077500-0650 Thermistor 1 15001-
Reference:K1110-013018 Page:K021019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Air Conditioner Unit (#15001-)
Index Code Part Number Description Qty Serial No.
24 ND017661-3700 Clamp 1 15001-
25 ND063600-4580 Servo Motor Assembly 1 15001-
26 ND063800-0300 Servo Motor Assembly 2 15001-
27 ND116660-0600 Door 2 15001-
28 ND116740-2290 Door 1 28941-
ND116640-8051 Dumper 1 15001-28940
29 ND116650-9870 Door 2 15001-
30 ND017231-1400 Clamp 1 15001-
31 ND116682-0670 Lever 1 15001-
32 ND116662-8420 Shaft 1 15001-
33 ND017212-1720 Lock 1 15001-
34 ND949001-1730 Screw, Tapping 38 15001-
35 ND146687-6360 Packing 1 15001-
36 ND146687-6370 Packing 1 15001-
37 ND146687-6380 Packing 1 15001-
38 ND145530-1210 Filter, Recirculation Air 1 15001-
39 ND949008-0460 Screw, Tapping 3 15001-
40 ND116576-8050 Plate 1 15001-
41 ND116576-8060 Plate 1 15001-
42 ND116780-4690 Lever 2 15001-
43 ND116780-4700 Lever 2 15001-
44 ND116780-4710 Lever 1 15001-
45 ND116682-7310 Lever 1 15001-
46 ND116782-1370 Lever 1 15001-
47 ND116662-8430 Shaft 1 15001-
48 ND116662-8440 Shaft 1 15001-
49 ND246470-5634 Wiring Harness 1 28941-
ND246470-5631 Wiring Harness 1 15001-28940
50 ND246780-1370 Clamp 1 15001-
51 ND146687-6400 Packing 1 15001-
52 ND017780-3110 Cable 1 15001-

Reference:K1110-013018 Page:K021019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001513
8

9
10
11

1 7
4
2
3

5 6

17 16
20 14
13 15

12

21

17
15
22

20 23

21
16
18
14
19

Reference:K1110-013019 Page:K021020

PC78US-8 S/N 15001-UP


Floor Frame, Air Conditioner Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-80825 Bolt 5 15001-
2 01643-30823 Washer 5 15001-
3 208-979-7540 Collar 5 15001-
4 22P-53-13141 Bracket 1 15001-
5 01010-D0616 Bolt 1 15001-
6 01643-70623 Washer 1 15001-
7 08211-01520 Clip 1 15001-
8 22B-979-2781 Duct 1 15001-
9 01010-80825 Bolt 2 15001-
10 01643-30823 Washer 2 15001-
11 208-979-7540 Collar 2 15001-
12 22P-979-1850 Hose 1 15001-
13 22P-979-1870 Hose 1 15001-
14 21W-979-5111 Hose 1 15001-
15 20Y-979-3150 O-ring 2 15001-
16 21W-979-5121 Hose 1 15001-
17 20Y-979-3130 O-ring 2 15001-
18 208-979-7650 Connector 1 15001-
19 01435-40620 Bolt 1 15001-
20 21W-979-5131 Hose 1 15001-
21 21W-979-5141 Hose 1 15001-
22 09479-02400 Clip 2 15001-
23 08034-20536 Band 1 15001-

Reference:K1110-013019 Page:K021020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001518
30 23 33
29
32
33
21 34 20
34
13 15 17
27 12
15
31 32 25 15 19
8
10 3
16
6
14
18
4

30
32
2 24

13 29
22 21 34
15 34 33 23 33
17
7 6 16
11
5 14 12
9
28 10 19
4 15
26 18
25 8
32 15
31
27

35

Reference:K1110-013020 Page:K021021

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-62-15151 Hose 1 15001-
2 22P-62-15371 Hose 1 15001-
3 22P-62-15202 Hose Assembly 1 21086-
A1 22P-62-15201 Hose Assembly 1 15001-21085
4 22P-62-15332 Hose 1 21086-
A1 22P-62-15331 Hose 1 15001-21085
5 20U-62-22190 O-ring 1 15001-
6 22P-62-15292 Hose 1 21086-
A1 22P-62-15291 Hose 1 15001-21085
7 20U-62-22190 O-ring 1 15001-
8 22P-62-15232 Hose 1 21086-
A1 22P-62-15231 Hose 1 15001-21085
9 20U-62-22190 O-ring 1 15001-
10 22P-62-15332 Hose 1 21086-
A1 22P-62-15331 Hose 1 15001-21085
11 20U-62-22190 O-ring 1 15001-
12 22P-62-15211 Hose 1 15001-
13 22P-62-15121 Hose 1 15001-
14 20Y-62-22860 Band, Brown 2 15001-
15 20Y-62-22850 Band, Green 6 15001-
16 20Y-62-22830 Band, White 2 15001-
17 20Y-62-22820 Band, Blue 2 15001-
18 21U-62-34740 Band, Orange 2 15001-
19 20Y-62-22790 Band, Red 2 15001-
20 22P-62-15102 Hose Assembly 1 21086-
A1 22P-62-15101 Hose Assembly 1 15001-21085
21 22P-62-15142 Hose 1 21086-
A1 22P-62-15141 Hose 1 15001-21085
22 20U-62-22190 O-ring 1 15001-
23 22P-62-15132 Hose 1 21086-
Reference:K1110-013020 Page:K021021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping (#15001-)
Index Code Part Number Description Qty Serial No.
23 A1 22P-62-15131 Hose 1 15001-21085
24 20U-62-22190 O-ring 1 15001-
25 22P-62-15142 Hose 1 21086-
A1 22P-62-15141 Hose 1 15001-21085
26 20U-62-22190 O-ring 1 15001-
27 22P-62-15282 Hose 1 21086-
A1 22P-62-15281 Hose 1 15001-21085
28 20U-62-22190 O-ring 1 15001-
29 22P-62-15111 Hose 1 15001-
30 22P-62-15191 Hose 1 15001-
31 20Y-62-22840 Band, Black 2 15001-
32 20Y-62-22820 Band, Blue 6 15001-
33 20Y-62-22810 Band, Yellow 4 15001-
34 20Y-62-22790 Band, Red 4 15001-
35 22P-62-15261 Hose 1 15001-

Reference:K1110-013020 Page:K021021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001542
1

13 14
17
15
16
18 2

4
18

7
4
3

4
10
6
7 7 5
10 12
11
9
8

Reference:K1110-013021 Page:K021022

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve Piping Clamp (#15001-)
Index Code Part Number Description Qty Serial No.
1 08034-20536 Band 3 15001-
2 134-03-61410 Band 2 15001-
3 21W-54-42291 Grommet 1 15001-
4 04434-53411 Clip 3 15001-
5 01010-81020 Bolt 3 15001-
6 01643-31032 Washer 3 15001-
7 04434-52711 Clip 3 15001-
8 01010-81020 Bolt 2 15001-
9 01643-31032 Washer 2 15001-
10 04434-52711 Clip 2 15001-
11 01010-81020 Bolt 2 15001-
12 01643-31032 Washer 2 15001-
13 22P-53-13151 Grommet 1 15001-
14 08034-20536 Band 1 15001-
15 208-06-19170 Clip 1 15001-
16 01010-81020 Bolt 1 15001-
17 01643-31032 Washer 1 15001-
18 04435-51510 Clip 2 15001-

Reference:K1110-013021 Page:K021022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001557

9
21 8 5
18 8
7
8
8
20 6
16
20 23 1 9
24 8 4
7 8
9
22 20
15 10
21 11
19 3
20 11
20 2
17 8 10
21 4
12 20 9
24 15
23 21
14
13

Reference:K1110-013022 Page:K021023

PC78US-8 S/N 15001-UP


Floor Frame, P-Block and T-Block (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-42351 Block 1 15001-
2 01010-80845 Bolt 2 15001-
3 01643-30823 Washer 2 15001-
4 02781-0021D Union 2 15001-
5 11Y-62-12230 Union 1 15001-
6 07040-11409 Plug 1 15001-
7 02783-10210 Elbow 2 15001-
8 07002-11423 O-ring 6 15001-
9 02896-11008 O-ring 5 15001-
10 07040-11007 Plug 2 15001-
11 07002-11023 O-ring 2 15001-
12 21W-62-42351 Block 1 15001-
13 01010-80845 Bolt 2 15001-
14 01643-30823 Washer 2 15001-
15 02781-0021D Union 2 15001-
16 07040-11409 Plug 1 15001-
17 11Y-62-12230 Union 1 15001-
18 02782-10210 Elbow 1 15001-
19 11Y-62-12510 Elbow 1 15001-
20 07002-11423 O-ring 6 15001-
21 02896-11008 O-ring 4 15001-
22 02896-11009 O-ring 1 15001-
23 07040-11007 Plug 2 15001-
24 07002-11023 O-ring 2 15001-

Reference:K1110-013022 Page:K021023
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000773

Reference:K1110-013023 Page:K021024

PC78US-8 S/N 15001-UP


Floor Frame, Plug (#15001-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25590 Grommet 1 15001-

Reference:K1110-013023 Page:K021024
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001536
2
3

5
6

Reference:K1110-013024 Page:K021025

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Footrest, R.H. (#15001-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25120 Footrest 1 15001-
2 01010-81025 Bolt 2 15001-
3 01643-31032 Washer 2 15001-
4 22P-53-13210 Plate 1 15001-
5 01010-81020 Bolt 2 15001-
6 01643-31032 Washer 2 15001-

Reference:K1110-013024 Page:K021025
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
@@5X114@
12
18

16
17
15
13
11

14

17 2
15
3
4

5
7

10
9
8

Reference:K1110-013025 Page:K021026

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Blade (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-01270 Valve Assembly, PPC 1 15872-
702-16-01600 Valve Assembly, PPC 1 15001-15871
1 C1 Body 1 15001-
2 C1 Valve 2 15001-
3 702-16-51140 Shim, T=0.30mm 2 15001-
702-16-54670 Shim, T=0.20mm 4 15001-
4 702-16-54550 Spring, L=22.73mm 2 15001-
5 702-16-54571 Retainer, T=5.9mm 2 15001-
6 702-16-54560 Spring 2 15872-
702-16-54160 Spring 2 15001-15871
7 702-16-53170 Piston 2 15001-
8 702-16-51270 Seal 2 15001-
9 702-16-54580 Collar 2 15001-
10 702-16-54590 O-ring 2 15001-
11 C1 Lever 1 15001-
12 C1 Plate 1 15001-
13 C1 Shaft 1 15001-
14 702-16-54641 Boot 1 15001-
15 01252-30625 Bolt 2 15872-
01252-60625 Bolt 2 15001-15871
16 702-16-54660 Plate 1 15001-
17 702-16-54650 Plate 2 15001-
702-16-54670 Shim, T=0.20mm 4 15001-
18 702-16-54880 Filter 1 15001-

Reference:K1110-013025 Page:K021026
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA018048
11

12

7 6 24
8 23 21

10 9
1
20
2
19 25
17 22
18
20
21
14
13 24 25
23 22
16

15

27 26

4
5 3

Reference:K1110-013026 Page:K021027

PC78US-8 S/N 15001-UP


Floor Frame, Blade Control Lever (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-D1025 Bolt 2 15001-
2 01643-71032 Washer 2 15001-
3 22P-43-13310 Bracket 1 15001-
4 01010-81040 Bolt 2 15001-
5 01643-31032 Washer 2 15001-
6 22B-43-33181 Lever 1 28941-
A2 22B-43-33180 Lever 1 19769-28940
A2 22P-43-13330 Lever 1 15001-19768
7 01010-D0825 Bolt 2 15001-
8 01643-70823 Washer 2 15001-
9 01583-11408 Nut 1 15001-
10 22U-43-21730 Seat 1 15001-
11 20T-43-71110 Knob 1 15001-
12 20T-43-71190 Nut 1 15001-
13 21W-62-42370 Elbow 1 15001-
14 07000-12011 O-ring 1 15001-
15 21W-62-42370 Elbow 1 15001-
16 07000-12011 O-ring 1 15001-
17 11Y-62-12140 Nipple 2 15001-
18 07000-12011 O-ring 2 15001-
19 02896-11008 O-ring 2 15001-
20 02760-00215 Hose, Face Seal Type, Red 1 15001-
21 21W-62-53360 Hose 1 15001-
22 20Y-62-22850 Band, Green 2 15001-
23 20Y-62-22830 Band, White 2 15001-
24 20Y-62-22820 Band, Blue 2 15001-
25 20Y-62-22790 Band, Red 2 15001-
26 22B-43-23580 Sheet 1 15001-
27 22B-54-16461 Rivet 2 15001-

Reference:K1110-013026 Page:K021027
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, With Blade, AM-FM Radio, North America, 1-Additional Actuator Piping
FIG. Name FIG. No.
Floor Frame, Floor, Frame K1110-012001
Floor Frame, PPC Valve for Travel K1110-012002
Floor Frame, Travel Lever and Travel Pedal K1110-012003
Floor Frame, Floor, Footrest, L.H. K1110-012004
Floor Frame, Floor, Base K1110-012005
Floor Frame, Wiring Harness K1110-012006
Floor Frame, Electric Parts K1110-012007
Floor Frame, Wiring Harness Clamp, Floor Frame K1110-012008
Floor Frame, Work Equipment Lever L.H. K1110-012009
Floor Frame, PPC Valve for Work Equipment, L.H. K1110-012010
Floor Frame, Console Box, L.H. (#15001-16168) K1110-012011
Floor Frame, Console Box, L.H. (#16169-) K1110-012011A
Floor Frame, Radio K1110-012012
Floor Frame, Work Equipment Lock Lever K1110-012013
Floor Frame, Work Equipment Control Lever, R.H. K1110-012014
Floor Frame, PPC Valve for Work Equipment, R.H. K1110-012015
Floor Frame, Console Box, R.H. K1110-012016
Floor Frame, Starting Switch and Switch K1110-012017
Floor Frame, Air Conditioner Unit K1110-012018
Floor Frame, Air Conditioner Piping K1110-012019
Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping K1110-012020
Floor Frame, PPC Valve Piping Clamp K1110-012021
Floor Frame, P-Block and T-Block K1110-012022
Floor Frame, Plug K1110-012023
Floor Frame, PPC Valve for Swing and Attachment K1110-012024
Floor Frame, Work Equipment Offset Control Pedal K1110-012025
Floor Frame, PPC Valve for Blade K1110-012026
Floor Frame, Blade Control Lever K1110-012027

Reference:X22-1039200 Page:K022000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001565
6
3
5 7
4

2
10
11
12
11 13
12
13

Reference:K1110-012001 Page:K022001

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Frame (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-53-13111 Floor 1 15001-
2 22P-53-13121 Plate 1 15001-
3 01010-81016 Bolt 2 15001-
4 01643-31032 Washer 2 15001-
5 22P-53-13130 Plate 1 15001-
6 01010-81016 Bolt 2 15001-
7 01643-31032 Washer 2 15001-
8 07286-03833 Hose 1 15001-
9 07280-04726 Clamp 1 15001-
10 22U-54-25581 Grommet 1 15001-
11 01010-81020 Bolt 4 15001-
12 01643-31032 Washer 4 15001-
13 01643-31032 Washer 4 15001-

Reference:K1110-012001 Page:K022001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY010653
25

23

31
29
30
2 28
3 27
4
6
5
7 26
9 23
8
31
29
30
28
27

18

24
11
19
13
10
22
21
11
12 20
19 18
15
14 17
16
19
20

12
21
22

Reference:K1110-012002 Page:K022002

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Travel (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-04271 Valve Assembly, PPC 1 21285-
702-16-04270 Valve Assembly, PPC 1 15001-21284
1 C1 Valve Body 1 15001-
2 C1 Valve 4 21285-
C1 Valve 4 15001-21284
3 702-16-51140 Shim, T=0.30mm 4 15001-
4 702-16-53420 Spring 4 15001-
5 702-16-53140 Retainer 4 15001-
6 702-16-54420 Spring 4 15001-
7 702-16-53170 Piston 4 15001-
8 702-16-71150 Seal 4 15001-
9 702-16-71160 Seat 4 15001-
10 C1 Case 1 15001-
11 C1 Lever 2 15001-
12 C1 Shaft 2 15001-
13 702-16-73640 Plate 1 15001-
14 01010-80855 Bolt 2 15001-
15 01643-30823 Washer 2 15001-
16 01010-80820 Bolt 4 21285-
01010-80816 Bolt 4 15001-21284
17 702-16-54331 Washer, T=1.60mm 4 15001-
702-16-54341 Washer, T=1.30mm 4 15001-
702-16-54351 Washer, T=1.00mm 4 15001-
702-16-56380 Washer, T=1.90mm 4 15001-
702-16-56390 Washer, T=2.20mm 4 15001-
18 C1 Pin, Spring 2 15001-
19 C1 Bushing 4 15001-
20 C1 O-ring 2 15001-
21 702-16-73610 Damper Assembly 2 15001-
22 01023-10306 Screw 4 15001-
Reference:K1110-012002 Page:K022002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, PPC Valve for Travel (#15001-)
Index Code Part Number Description Qty Serial No.
23 C1 Pin 2 15001-
24 04022-04016 Pin, Dowel 2 15001-
25 C1 Plug 2 15001-
26 C1 Plug 2 15001-
27 07040-11209 Plug 3 15001-
28 07002-11223 O-ring 3 15001-
29 C1 Ball 3 15001-
30 C1 Plug 3 15001-
31 C1 Seat 3 15001-

Reference:K1110-012002 Page:K022002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000753
19 20
11
12
18
10 17

16
13
5 17
14
6
3
4 15

10
8 12
11
9 21
27
22 7 28
1
23
14
2 13

25
24
30 26
29
30
30
29 33
30 34
31 30
34 29
30
32
34

Reference:K1110-012003 Page:K022003

PC78US-8 S/N 15001-UP


Floor Frame, Travel Lever and Travel Pedal (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81020 Bolt 2 15001-
2 01643-31032 Washer 2 15001-
3 20Y-43-41361 Collar 4 15001-
4 20Y-43-41121 Cover 1 15001-
5 01010-81020 Bolt 4 15001-
6 01643-31032 Washer 4 15001-
7 203-43-51620 Spring 2 15001-
22U-43-21350 Cover Assembly 2 15001-
8 C1 Cover 1 15001-
9 22U-43-21360 Seal 1 15001-
10 20Y-43-41111 Lever 2 15001-
11 01010-D1045 Bolt 4 15001-
12 01643-71032 Washer 4 15001-
13 01010-81030 Bolt 4 15001-
14 01643-31032 Washer 4 15001-
15 22U-43-21111 Pedal 1 15001-
16 22U-43-21121 Pedal 1 15001-
17 21W-43-41441 Lever 2 15001-
18 20Y-43-21231 Knob 1 15001-
19 20Y-43-21241 Knob 1 15001-
20 01023-20416 Screw 2 15001-
21 7861-93-1840 Sensor, Pressure 1 15001-
07000-12011 O-ring 1 15001-
22 20Y-62-18910 Plug 1 15001-
23 07000-12018 O-ring 2 15001-
24 02781-00210 Union 1 15001-
25 07002-11423 O-ring 1 15001-
26 02896-11008 O-ring 1 15001-
27 22P-62-15270 Nipple 1 15001-
28 07002-11423 O-ring 1 15001-
Reference:K1110-012003 Page:K022003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Travel Lever and Travel Pedal (#15001-)
Index Code Part Number Description Qty Serial No.
29 21W-62-44640 Joint 4 15001-
30 07000-12015 O-ring 8 15001-
31 21W-62-44650 Union 1 15001-
32 21W-62-44660 Union 2 15001-
33 21W-62-44670 Union 1 15001-
34 02896-11008 O-ring 4 15001-

Reference:K1110-012003 Page:K022003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000754
3
4
1

5
6
2

Reference:K1110-012004 Page:K022004

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Footrest, L.H. (#15001-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25110 Footrest 1 15001-
2 22P-43-13680 Plate 1 15001-
3 01010-81025 Bolt 2 15001-
4 01643-31032 Washer 2 15001-
5 01010-81020 Bolt 1 15001-
6 01643-31032 Washer 1 15001-

Reference:K1110-012004 Page:K022004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000755
12

6 5
14
4
13

14 16
8 15
13 17

2 10
18
3
11
9

Reference:K1110-012005 Page:K022005

PC78US-8 S/N 15001-UP


Floor Frame, Floor, Base (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-43-13442 Bracket 1 15001-
2 01010-D1235 Bolt 6 15001-
3 01643-71232 Washer 6 15001-
4 22M-43-21220 Adjuster 1 15001-
5 01252-80816 Bolt 3 15001-
6 22M-43-21230 Adjuster 1 15001-
7 01252-80816 Bolt 3 15001-
8 22P-43-13371 Pipe 1 15001-
9 22P-43-13351 Stopper 1 15001-
10 01010-D1020 Bolt 2 15001-
11 01643-71032 Washer 2 15001-
12 22P-43-13461 Frame 1 15001-
13 01252-80825 Bolt 6 15001-
14 01643-80823 Washer 6 15525-
01643-70823 Washer 6 15001-15524
15 21W-43-56130 Cover 1 15703-
22B-43-23461 Cover 1 15001-15702
16 01010-81020 Bolt 2 15001-
17 01643-31032 Washer 2 15001-
18 22B-43-23590 Trim 1 15001-

Reference:K1110-012005 Page:K022005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA009670
5 3
24 6 5
1 25 5 2
3 4
26 5
2 6
6 5
6 3
5

14

15 28
17 27
16
30
20
29
19
18

8 9

7
12 13
8 9

8 9
10 11
1

32
21
23 31
22

Reference:K1110-012006 Page:K022006

PC78US-8 S/N 15001-UP


Floor Frame, Wiring Harness (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-06-51114 Wiring Harness 1 15872-
21W-06-51113 Wiring Harness 1 15001-15871
2 08041-03000 Fuse, 30Amp. 2 15001-
3 08041-02000 Fuse, 20Amp. 3 15001-
4 08041-01500 Fuse, 15Amp. 1 15001-
5 08041-01000 Fuse, 10Amp. 9 15001-
6 08041-00500 Fuse, 5Amp. 5 15001-
7 20T-06-81230 Fusible Link, 45Amp. 2 15001-
8 HM6440-0129 F-Connector, Pink 5 15001-
9 HM6440-0128 M-Connector, Pink 5 15001-
10 HM6400-0013 F-Connector, Green 1 15001-
11 HM6409-0072 M-Connector, Green 1 15001-
12 HM6400-0012 F-Connector, Black 1 15001-
13 HM6409-0071 M-Connector, Black 1 15001-
14 22P-06-11840 Bracket 1 15001-
15 600-815-2170 Switch, Heater, Ribbon Heater Relay 1 15001-
16 01010-80616 Bolt 2 15001-
17 01643-30623 Washer 2 15001-
18 01010-80816 Bolt 2 15001-
19 01643-30823 Washer 2 15001-
20 04434-50610 Clip 1 15001-
21 04434-51910 Clip 1 15001-
22 01010-81020 Bolt 1 15001-
23 01643-31032 Washer 1 15001-
24 08038-02027 Cap 1 15001-
25 08038-04030 Cap 1 15001-
26 08038-00519 Cap 1 15001-
27 01010-81020 Bolt 3 15001-
28 01643-31032 Washer 3 15001-
29 01010-80816 Bolt 1 15001-
Reference:K1110-012006 Page:K022006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Wiring Harness (#15001-)
Index Code Part Number Description Qty Serial No.
30 01643-30823 Washer 1 15001-
31 22B-54-23221 Grommet 1 15001-
32 08034-20536 Band 1 15001-

Reference:K1110-012006 Page:K022006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000757
3
4

2 1

16
6
7
17
5
17
21 22
23
25
23 24 8
22 21
21

19
20 11
18
15

10

14
13
14 13
12 12

Reference:K1110-012007 Page:K022007

PC78US-8 S/N 15001-UP


Floor Frame, Electric Parts (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-06-11432 Bracket 1 19304-
A2 22P-06-11431 Bracket 1 15001-19303
2 7835-46-7002 Controller 1 15872-
7835-46-7001 Controller 1 15001-15871
3 01010-80820 Bolt 4 15001-
4 01643-30823 Washer 4 15001-
5 7861-94-3000 Resistor 1 15001-
6 01010-80816 Bolt 2 15001-
7 01643-30823 Washer 2 15001-
8 22B-06-21430 Wiring Harness 1 15001-
9 208-43-71420 Cap 2 15001-
10 08211-01920 Clip 1 15001-
11 08211-01020 Clip 1 15001-
12 04434-52711 Clip 2 15001-
13 01010-80816 Bolt 2 15001-
14 01643-30823 Washer 2 15001-
15 01023-10620 Screw 2 15001-
16 22P-06-11370 Sheet 1 15001-
17 22U-43-23290 Clip 3 15001-
18 04434-51908 Clip 1 15001-
19 01010-80816 Bolt 1 15001-
20 01643-30823 Washer 1 15001-
21 7861-74-5100 Relay 7 15001-
22 01010-80612 Bolt 8 15001-
23 01643-30623 Washer 8 15001-
24 8233-06-3350 Diode 3 15001-
25 421-07-31270 Relay 2 15001-

Reference:K1110-012007 Page:K022007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001477

12 2
11 7
14 8
13 18 22 15
26
21
28
23 4
27 17 3
18
16
25 10
20 6
24 9
21 19 5

Reference:K1110-012008 Page:K022008

PC78US-8 S/N 15001-UP


Floor Frame, Wiring Harness Clamp, Floor Frame (#15001-)
Index Code Part Number Description Qty Serial No.
1 08211-01520 Clip 1 15001-
2 04434-53411 Clip 1 15001-
3 01010-81025 Bolt 1 15001-
4 01643-31032 Washer 1 15001-
5 01010-80816 Bolt 2 15001-
6 01643-30823 Washer 2 15001-
7 04434-52711 Clip 1 15001-
8 07095-20420 Cushion 1 15001-
9 01010-81020 Bolt 1 15001-
10 01643-31032 Washer 1 15001-
11 155-61-15350 Clip 1 15001-
12 22M-62-13660 Cushion 1 15001-
13 01010-81020 Bolt 1 15001-
14 01643-31032 Washer 1 15001-
15 04434-53411 Clip 1 15001-
16 01010-81020 Bolt 1 15001-
17 01643-31032 Washer 1 15001-
18 04434-53411 Clip 2 15001-
19 01010-81020 Bolt 2 15001-
20 01643-31032 Washer 2 15001-
21 08211-00720 Clip 2 15001-
22 08211-01020 Clip 1 15001-
23 04434-51010 Clip 1 15001-
24 01010-81020 Bolt 1 15001-
25 01643-31032 Washer 1 15001-
26 08193-20010 Clip 1 15001-
27 01010-81020 Bolt 1 15001-
28 01643-31032 Washer 1 15001-

Reference:K1110-012008 Page:K022008
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001494

9
1 8
5

Reference:K1110-012009 Page:K022009

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Lever L.H. (#15001-)
Index Code Part Number Description Qty Serial No.
20Y-43-22611 Lever Assembly 1 15001-
1 20Y-43-22211 Lever 1 15001-
20Y-43-22621 Knob 1 15001-
2 20Y-43-22630 Knob 1 15001-
3 20Y-43-22421 Insert 1 15001-
4 20Y-43-22250 Plate 1 15001-
5 20Y-43-22261 Boot 1 15001-
6 20Y-43-22370 Boot 1 15001-
7 600-411-1280 Nut 1 15001-
8 01252-41025 Bolt 1 15001-
9 01643-51032 Washer 1 15001-

Reference:K1110-012009 Page:K022009
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011336
19

13

18

16
17

15

14

11
11 12

12
10
10 7
7
8
9
6
6 5
5
4
4
1

2
3

Reference:K1110-012010 Page:K022010

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Work Equipment, L.H. (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-04510 Valve, Pilot 1 15001-
1 C1 Body, Valve 1 15001-
2 C1 Plug 2 15001-
3 C1 Plug 2 15001-
4 C1 Valve 4 15001-
5 702-16-51140 Shim, T=0.30mm 4 15001-
702-16-54670 Shim, T=0.20mm 4 15001-
6 702-16-71350 Spring 4 15001-
7 702-16-53140 Retainer 4 15001-
8 702-16-53470 Spring 2 15001-
9 702-16-53590 Spring 2 15001-
10 702-16-53170 Piston 4 15001-
11 702-16-71150 Seal 4 15001-
12 702-16-71160 Seat 4 15001-
13 702-16-71280 Boot 1 15001-
14 702-16-71141 Plate 1 15001-
15 702-16-71131 Plate 1 15001-
16 01010-80620 Bolt 4 15001-
17 702-16-51240 Joint, Universal 1 15001-
18 702-16-71361 Disc 1 15001-
19 702-16-71441 Nut 1 15001-

Reference:K1110-012010 Page:K022010
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000762

5 37
4 3 36
6 39
27
29 1 38
20 2 8
7
20 17 4 56
9
20 40
13 52
41 51 54 53
21 13 26
42
28 19
29 18 43 33

34 13
15
35 16
25
22 24 10
23 14 57

12 57
11 33
50
49
33
30
33
45
31 46
32 50 44

55
50
48
47

Reference:K1110-012011 Page:K022011

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, L.H. (#15001-16168)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15001-@
2 01643-30823 Washer 4 15001-@
3 20Y-62-18910 Plug 1 15001-@
4 07000-12018 O-ring 2 15001-@
5 20Y-62-18890 Bolt, Joint 1 15001-@
6 07000-12015 O-ring 2 15001-@
7 02781-0021D Union 4 15001-@
8 07002-11423 O-ring 4 15001-@
9 02896-11008 O-ring 4 15001-@
10 22B-43-23112 Frame 1 15001-@
11 01010-D1030 Bolt 4 15001-@
12 01643-71032 Washer 4 15001-@
13 06124-01616 Bearing 4 15001-@
14 22B-43-23721 Bracket 1 15001-@
15 22B-43-23161 Shaft 1 15001-@
16 01435-00612 Bolt 1 15001-@
17 22B-43-23471 Spring 1 15001-@
18 04050-12015 Pin, Cotter 1 15001-@
19 01640-20816 Washer 1 15001-@
20 426-925-3981 Washer 3 15001-@
21 22B-43-23142 Guide 1 15001-@
22 04205-30832 Pin 2 15001-@
23 21U-43-32430 Collar 2 15001-@
24 04050-12015 Pin, Cotter 2 15001-@
25 01640-20816 Washer 2 15001-@
26 21U-43-32380 Spring, Gas 1 15001-@
27 04050-12015 Pin, Cotter 1 15001-@
28 04050-13015 Pin, Cotter 1 15001-@
29 01640-20816 Washer 2 15001-@
30 22B-06-21420 Switch, Work Equipment Lock 1 15001-@
Reference:K1110-012011 Page:K022011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, L.H. (#15001-16168)
Index Code Part Number Description Qty Serial No.
31 22U-06-22490 Plate 1 15001-@
32 01023-60320 Screw 2 15001-@
33 08059-00310 Clip 4 15001-16168
34 20Y-54-11611 Stopper 1 15001-@
35 01580-11008 Nut 1 15001-@
36 208-06-19170 Clip 1 15001-@
37 04434-51410 Clip 1 15001-@
38 01010-81025 Bolt 1 15001-@
39 01643-31032 Washer 1 15001-@
40 22B-43-23213 Cover 1 15001-@
41 01010-80616 Bolt 4 15001-@
42 01643-30623 Washer 4 15001-@
43 20Y-43-41290 Collar 4 15001-@
44 22B-43-23221 Cover 1 15001-@
45 01245-00616 Screw 2 15001-@
46 01643-70623 Washer 2 15001-@
47 01010-80616 Bolt 1 15001-@
48 01643-30623 Washer 1 15001-@
49 01435-00616 Bolt 4 15001-@
50 20Y-43-41290 Collar 7 15001-@
51 22B-43-23231 Cover 1 15001-@
52 01245-00616 Screw 2 15001-@
53 01643-70623 Washer 2 15001-@
54 20Y-43-41290 Collar 2 15001-@
55 22B-43-23271 Cover 1 15001-@
56 08059-00515 Clip 1 15001-16168
57 22B-43-23280 Seal 2 15001-@

Reference:K1110-012011 Page:K022011
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006698

5 37
4 3 36
6 39
27
29 1 38
20 2 8
7
20 17 4
9 56
20
40
13 52
41 51 54 53
21 13 26
42
28 19
29 18 43 56

34 13
15
35 16
25
22 24 10
23 14 57

12 57
11
33
50
49
33
30
33
45
31 46
32 50 44

55
50
48
47

Reference:K1110-012011A Page:K022012

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, L.H. (#16169-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15001-
2 01643-30823 Washer 4 15001-
3 20Y-62-18910 Plug 1 15001-
4 07000-12018 O-ring 2 15001-
5 20Y-62-18890 Bolt, Joint 1 15001-
6 07000-12015 O-ring 2 15001-
7 02781-0021D Union 4 15001-
8 07002-11423 O-ring 4 15001-
9 02896-11008 O-ring 4 15001-
10 22B-43-23112 Frame 1 15001-
11 01010-D1030 Bolt 4 15001-
12 01643-71032 Washer 4 15001-
13 06124-01616 Bearing 4 15001-
14 22B-43-23722 Bracket 1 19440-
A2 22B-43-23721 Bracket 1 15001-19439
15 22B-43-23161 Shaft 1 15001-
16 01435-00612 Bolt 1 15001-
17 22B-43-23471 Spring 1 15001-
18 04050-12015 Pin, Cotter 1 15001-
19 01640-20816 Washer 1 15001-
20 426-925-3981 Washer 3 15001-
21 22B-43-23143 Guide 1 19440-
A2 22B-43-23142 Guide 1 15001-19439
22 04205-30835 Pin 2 15001-
23 21U-43-32430 Collar 2 15001-
24 04050-12015 Pin, Cotter 2 15001-
25 01640-20816 Washer 2 15001-
26 21U-43-32380 Spring, Gas 1 15001-
27 04050-12015 Pin, Cotter 1 15001-
28 04050-13015 Pin, Cotter 1 15001-
Reference:K1110-012011A Page:K022012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, L.H. (#16169-)
Index Code Part Number Description Qty Serial No.
29 01640-20816 Washer 2 15001-
30 22B-06-21420 Switch, Work Equipment Lock 1 15001-
31 22U-06-22490 Plate 1 15001-
32 01023-60320 Screw 2 15001-
33 08059-00310 Clip 3 16169-
34 20Y-54-11611 Stopper 1 15001-
35 01580-11008 Nut 1 15001-
36 208-06-19170 Clip 1 15001-
37 04434-51410 Clip 1 15001-
38 01010-81025 Bolt 1 15001-
39 01643-31032 Washer 1 15001-
40 22B-43-23213 Cover 1 15001-
41 01010-80616 Bolt 4 15001-
42 01643-30623 Washer 4 15001-
43 20Y-43-41290 Collar 4 15001-
44 22B-43-23221 Cover 1 15001-
45 01245-00616 Screw 2 15001-
46 01643-70623 Washer 2 15001-
47 01010-80616 Bolt 1 15001-
48 01643-30623 Washer 1 15001-
49 01435-00616 Bolt 4 15001-
50 20Y-43-41290 Collar 7 15001-
51 22B-43-23231 Cover 1 15001-
52 01245-00616 Screw 2 15001-
53 01643-70623 Washer 2 15001-
54 20Y-43-41290 Collar 2 15001-
55 22B-43-23271 Cover 1 15001-
56 08059-00515 Clip 2 16169-
57 22B-43-23280 Seal 2 15001-

Reference:K1110-012011A Page:K022012
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001502
4 3
16
5
1 2
13
10 15
4
5 11
17
2 9
3

14
8
6 7
14

12

Reference:K1110-012012 Page:K022013

PC78US-8 S/N 15001-UP


Floor Frame, Radio (#15001-)
Index Code Part Number Description Qty Serial No.
1 20Y-06-42440 Radio 1 15893-
A2 20Y-06-41248 Radio 1 15001-15892
2 20Y-43-41482 Plate 2 15001-
3 01023-60510 Screw 6 15001-
4 01010-80616 Bolt 4 15001-
5 01643-30623 Washer 4 15001-
6 22B-43-23171 Bracket 1 15001-
7 01010-80616 Bolt 2 15001-
8 01643-30623 Washer 2 15001-
9 22B-43-23181 Bracket 1 15001-
10 01010-80616 Bolt 2 15001-
11 01643-30623 Washer 2 15001-
12 21W-06-51271 Wiring Harness 1 16169-
A2 21W-06-51270 Wiring Harness 1 15001-16168
13 08034-20414 Band, Black 2 15001-
14 08034-20519 Band 2 15001-
15 22B-54-28990 Sheet 1 15001-
16 20Y-06-41830 Wiring Harness 1 15001-
17 08912-51600 Cord 1 15001-

Reference:K1110-012012 Page:K022013
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000764

2 1

Reference:K1110-012013 Page:K022014

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Lock Lever (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-43-13111 Lever 1 15001-
2 22U-43-22490 Knob 1 15001-
3 20T-43-71280 Pin 1 15001-

Reference:K1110-012013 Page:K022014
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA022737
3

7
4

10
11
1
12

Reference:K1110-012014 Page:K022015

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Control Lever, R.H. (#15001-)
Index Code Part Number Description Qty Serial No.
22U-43-21172 Lever Assembly 1 15001-
1 20Y-43-22221 Lever 1 15001-
22U-43-21192 Knob 1 15001-
2 C1 Screw 1 15001-
3 20Y-43-22390 Knob 1 15001-
4 20Y-43-22421 Insert 1 15001-
5 22U-43-21211 Switch 1 15001-
6 20Y-43-22250 Plate 1 15001-
7 20Y-43-22261 Boot 1 15001-
8 20Y-43-22370 Boot 1 15001-
9 600-411-1280 Nut 1 15001-
10 01252-41025 Bolt 1 15001-
11 01643-51032 Washer 1 15001-
12 08034-40521 Band 1 15001-

Reference:K1110-012014 Page:K022015
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011336
19

13

18

16
17

15

14

11
11 12

12
10
10 7
7
8
9
6
6 5
5
4
4
1

2
3

Reference:K1110-012015 Page:K022016

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Work Equipment, R.H. (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-04510 Valve, Pilot 1 15001-
1 C1 Body, Valve 1 15001-
2 C1 Plug 2 15001-
3 C1 Plug 2 15001-
4 C1 Valve 4 15001-
5 702-16-51140 Shim, T=0.30mm 4 15001-
702-16-54670 Shim, T=0.20mm 4 15001-
6 702-16-71350 Spring 4 15001-
7 702-16-53140 Retainer 4 15001-
8 702-16-53470 Spring 2 15001-
9 702-16-53590 Spring 2 15001-
10 702-16-53170 Piston 4 15001-
11 702-16-71150 Seal 4 15001-
12 702-16-71160 Seat 4 15001-
13 702-16-71280 Boot 1 15001-
14 702-16-71141 Plate 1 15001-
15 702-16-71131 Plate 1 15001-
16 01010-80620 Bolt 4 15001-
17 702-16-51240 Joint, Universal 1 15001-
18 702-16-71361 Disc 1 15001-
19 702-16-71441 Nut 1 15001-

Reference:K1110-012015 Page:K022016
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001508
1
2
34
5 35
4 3
6
4 36
8

7
6
9
16
33
17
18

26
16
17
18 10
15
27
29 28
31
30

11
12
24
25
32

37 14
13

25
23
22

19
25
21
20

Reference:K1110-012016 Page:K022017

PC78US-8 S/N 15001-UP


Floor Frame, Console Box, R.H. (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-80820 Bolt 4 15001-
2 01643-30823 Washer 4 15001-
3 20Y-62-18910 Plug 1 15001-
4 07000-12018 O-ring 2 15001-
5 20Y-62-18890 Bolt, Joint 1 15001-
6 07000-12015 O-ring 2 15001-
7 02781-0021D Union 4 15001-
8 07002-11423 O-ring 4 15001-
9 02896-11008 O-ring 4 15001-
10 22P-43-13261 Frame 1 15001-
11 01010-D1230 Bolt 4 15001-
12 01643-71232 Washer 4 15001-
13 22U-43-23251 Sheet 1 15001-
14 22U-43-23290 Clip 2 15001-
15 20Y-43-41324 Cover 1 18212-
20Y-43-41323 Cover 1 15001-18211
16 01010-80616 Bolt 4 15001-
17 01643-30623 Washer 4 15001-
18 20Y-43-41290 Collar 4 15001-
19 22P-43-13240 Cover 1 15001-
20 01245-00616 Screw 2 15001-
21 01643-70623 Washer 2 15001-
22 01010-80616 Bolt 1 15001-
23 01643-30623 Washer 1 15001-
24 01435-00616 Bolt 2 15001-
25 20Y-43-41290 Collar 5 15001-
26 22B-43-23251 Cover 1 15001-
27 01245-00616 Screw 2 15001-
28 01643-70623 Washer 2 15001-
29 20Y-43-41290 Collar 2 15001-
Reference:K1110-012016 Page:K022017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Console Box, R.H. (#15001-)
Index Code Part Number Description Qty Serial No.
30 01245-00616 Screw 3 15001-
31 01643-70623 Washer 3 15001-
32 09415-02512 Cap 1 15001-
33 208-06-19170 Clip 1 15001-
34 01010-81030 Bolt 1 15001-
35 01643-31032 Washer 1 15001-
36 103-21-21260 Boss 1 15001-
37 21W-43-51130 Seal 1 15001-

Reference:K1110-012016 Page:K022017
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001540
9
8

12

6 12
10
5
2
13
3 14
4

11

Reference:K1110-012017 Page:K022018

PC78US-8 S/N 15001-UP


Floor Frame, Starting Switch and Switch (#15001-)
Index Code Part Number Description Qty Serial No.
1 08086-20000 Switch, Starting 1 15001-
2 20Y-43-41740 Plate 1 15001-
3 20Y-43-41750 Washer 3 15001-
4 20Y-43-41790 Washer 1 15001-
5 22U-06-22380 Potentiometer 1 15001-
6 22U-06-22460 Spring 1 15001-
7 20Y-43-41781 Knob 1 18494-
20Y-43-41780 Knob 1 15001-18493
8 20Y-06-42450 Switch, Lamp 1 28942-
A2 20Y-06-42121 Switch, Lamp 1 15001-28941
9 20Y-06-42190 Cover 4 15001-
10 21W-06-51240 Wiring Harness 1 15001-
11 22U-43-23260 Clip 1 15001-
12 04434-51710 Clip 2 15001-
13 01010-81016 Bolt 2 15001-
14 01643-31032 Washer 2 15001-

Reference:K1110-012017 Page:K022018
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000768
3

35

36 49
38
19
50 40 48
39 39
34 45
41 43
47
42 26 34
39
46 20
43
34 5 11
52
42 33 7
26 34 13
44
30 10

34 2

21 6 9 8

12 14
37 28
29 15
22
34 16

27
4
27

1 17
24

23
29

25 31

32 51
34
19
18

Reference:K1110-012018 Page:K022019

PC78US-8 S/N 15001-UP


Floor Frame, Air Conditioner Unit (#15001-)
Index Code Part Number Description Qty Serial No.
22B-979-2703 Air Conditioner Assembly 1 28941-
A2 22B-979-2702 Air Conditioner Assembly 1 20782-28940
A2 22B-979-2701 Air Conditioner Assembly 1 15001-20781
1 ND245450-6630 Case 1 15001-
2 ND245450-6640 Case 1 15001-
3 ND245450-6650 Case 1 15001-
4 ND116576-8040 Plate 1 15001-
ND446010-4660 Evaporator Assembly 1 15001-
5 ND446600-1472 Evaporator 1 15001-
6 ND949142-0020 O-ring 1 15001-
7 ND949142-0030 O-ring 1 15001-
8 ND446250-5990 Tube 1 15001-
9 ND447500-2980 Valve 1 19806-
A2 ND447500-2660 Valve 1 15001-19805
10 ND949046-3100 Bolt 1 15001-
11 ND146687-2091 Packing 1 15001-
12 ND146687-2080 Packing 1 15001-
13 ND146687-6350 Packing 1 15001-
14 ND146657-8850 Packing 1 15001-
15 ND949046-3610 Bolt 2 15001-
16 ND445021-3091 Plug 1 28941-
ND445021-3941 Plug 1 15001-28940
17 ND116420-6830 Heater 1 15001-
18 ND116340-8820 Motor Assembly 1 15001-
19 ND949008-0330 Screw, Tapping 4 15001-
20 ND077800-1130 Transistor 1 28941-
ND077800-1040 Transistor 1 15001-28940
21 ND077500-5890 Thermistor Assembly 1 15001-
22 ND246790-2060 Clamp 1 15001-
23 ND077500-0650 Thermistor 1 15001-
Reference:K1110-012018 Page:K022019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Air Conditioner Unit (#15001-)
Index Code Part Number Description Qty Serial No.
24 ND017661-3700 Clamp 1 15001-
25 ND063600-4580 Servo Motor Assembly 1 15001-
26 ND063800-0300 Servo Motor Assembly 2 15001-
27 ND116660-0600 Door 2 15001-
28 ND116740-2290 Door 1 28941-
ND116640-8051 Dumper 1 15001-28940
29 ND116650-9870 Door 2 15001-
30 ND017231-1400 Clamp 1 15001-
31 ND116682-0670 Lever 1 15001-
32 ND116662-8420 Shaft 1 15001-
33 ND017212-1720 Lock 1 15001-
34 ND949001-1730 Screw, Tapping 38 15001-
35 ND146687-6360 Packing 1 15001-
36 ND146687-6370 Packing 1 15001-
37 ND146687-6380 Packing 1 15001-
38 ND145530-1210 Filter, Recirculation Air 1 15001-
39 ND949008-0460 Screw, Tapping 3 15001-
40 ND116576-8050 Plate 1 15001-
41 ND116576-8060 Plate 1 15001-
42 ND116780-4690 Lever 2 15001-
43 ND116780-4700 Lever 2 15001-
44 ND116780-4710 Lever 1 15001-
45 ND116682-7310 Lever 1 15001-
46 ND116782-1370 Lever 1 15001-
47 ND116662-8430 Shaft 1 15001-
48 ND116662-8440 Shaft 1 15001-
49 ND246470-5634 Wiring Harness 1 28941-
ND246470-5631 Wiring Harness 1 15001-28940
50 ND246780-1370 Clamp 1 15001-
51 ND146687-6400 Packing 1 15001-
52 ND017780-3110 Cable 1 15001-

Reference:K1110-012018 Page:K022019
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001513
8

9
10
11

1 7
4
2
3

5 6

17 16
20 14
13 15

12

21

17
15
22

20 23

21
16
18
14
19

Reference:K1110-012019 Page:K022020

PC78US-8 S/N 15001-UP


Floor Frame, Air Conditioner Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-80825 Bolt 5 15001-
2 01643-30823 Washer 5 15001-
3 208-979-7540 Collar 5 15001-
4 22P-53-13141 Bracket 1 15001-
5 01010-D0616 Bolt 1 15001-
6 01643-70623 Washer 1 15001-
7 08211-01520 Clip 1 15001-
8 22B-979-2781 Duct 1 15001-
9 01010-80825 Bolt 2 15001-
10 01643-30823 Washer 2 15001-
11 208-979-7540 Collar 2 15001-
12 22P-979-1850 Hose 1 15001-
13 22P-979-1870 Hose 1 15001-
14 21W-979-5111 Hose 1 15001-
15 20Y-979-3150 O-ring 2 15001-
16 21W-979-5121 Hose 1 15001-
17 20Y-979-3130 O-ring 2 15001-
18 208-979-7650 Connector 1 15001-
19 01435-40620 Bolt 1 15001-
20 21W-979-5131 Hose 1 15001-
21 21W-979-5141 Hose 1 15001-
22 09479-02400 Clip 2 15001-
23 08034-20536 Band 1 15001-

Reference:K1110-012019 Page:K022020
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001518
30 23 33
29
32
33
21 34 20
34
13 15 17
27 12
15
31 32 25 15 19
8
10 3
16
6
14
18
4

30
32
2 24

13 29
22 21 34
15 34 33 23 33
17
7 6 16
11
5 14 12
9
28 10 19
4 15
26 18
25 8
32 15
31
27

35

Reference:K1110-012020 Page:K022021

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-62-15151 Hose 1 15001-
2 22P-62-15371 Hose 1 15001-
3 22P-62-15202 Hose Assembly 1 21086-
A1 22P-62-15201 Hose Assembly 1 15001-21085
4 22P-62-15332 Hose 1 21086-
A1 22P-62-15331 Hose 1 15001-21085
5 20U-62-22190 O-ring 1 15001-
6 22P-62-15292 Hose 1 21086-
A1 22P-62-15291 Hose 1 15001-21085
7 20U-62-22190 O-ring 1 15001-
8 22P-62-15232 Hose 1 21086-
A1 22P-62-15231 Hose 1 15001-21085
9 20U-62-22190 O-ring 1 15001-
10 22P-62-15332 Hose 1 21086-
A1 22P-62-15331 Hose 1 15001-21085
11 20U-62-22190 O-ring 1 15001-
12 22P-62-15211 Hose 1 15001-
13 22P-62-15121 Hose 1 15001-
14 20Y-62-22860 Band, Brown 2 15001-
15 20Y-62-22850 Band, Green 6 15001-
16 20Y-62-22830 Band, White 2 15001-
17 20Y-62-22820 Band, Blue 2 15001-
18 21U-62-34740 Band, Orange 2 15001-
19 20Y-62-22790 Band, Red 2 15001-
20 22P-62-15102 Hose Assembly 1 21086-
A1 22P-62-15101 Hose Assembly 1 15001-21085
21 22P-62-15142 Hose 1 21086-
A1 22P-62-15141 Hose 1 15001-21085
22 20U-62-22190 O-ring 1 15001-
23 22P-62-15132 Hose 1 21086-
Reference:K1110-012020 Page:K022021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Work Equipment Control Proportional Pressure Control (PPC) Piping (#15001-)
Index Code Part Number Description Qty Serial No.
23 A1 22P-62-15131 Hose 1 15001-21085
24 20U-62-22190 O-ring 1 15001-
25 22P-62-15142 Hose 1 21086-
A1 22P-62-15141 Hose 1 15001-21085
26 20U-62-22190 O-ring 1 15001-
27 22P-62-15282 Hose 1 21086-
A1 22P-62-15281 Hose 1 15001-21085
28 20U-62-22190 O-ring 1 15001-
29 22P-62-15111 Hose 1 15001-
30 22P-62-15191 Hose 1 15001-
31 20Y-62-22840 Band, Black 2 15001-
32 20Y-62-22820 Band, Blue 6 15001-
33 20Y-62-22810 Band, Yellow 4 15001-
34 20Y-62-22790 Band, Red 4 15001-
35 22P-62-15261 Hose 1 15001-

Reference:K1110-012020 Page:K022021
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001542
1

13 14
17
15
16
18 2

4
18

7
4
3

4
10
6
7 7 5
10 12
11
9
8

Reference:K1110-012021 Page:K022022

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve Piping Clamp (#15001-)
Index Code Part Number Description Qty Serial No.
1 08034-20536 Band 3 15001-
2 134-03-61410 Band 2 15001-
3 21W-54-42291 Grommet 1 15001-
4 04434-53411 Clip 3 15001-
5 01010-81020 Bolt 3 15001-
6 01643-31032 Washer 3 15001-
7 04434-52711 Clip 3 15001-
8 01010-81020 Bolt 2 15001-
9 01643-31032 Washer 2 15001-
10 04434-52711 Clip 2 15001-
11 01010-81020 Bolt 2 15001-
12 01643-31032 Washer 2 15001-
13 22P-53-13151 Grommet 1 15001-
14 08034-20536 Band 1 15001-
15 208-06-19170 Clip 1 15001-
16 01010-81020 Bolt 1 15001-
17 01643-31032 Washer 1 15001-
18 04435-51510 Clip 2 15001-

Reference:K1110-012021 Page:K022022
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001544

9
20 8 5
17 8
7
8
8
19 6
20
16 9
19 22 1 9
23 8 4
7 8
9
21 19
15 10
20 11
18 3
19 11
19 2
16 8 10
20 4
12 19 9
23 15
22 20
14
13

Reference:K1110-012022 Page:K022023

PC78US-8 S/N 15001-UP


Floor Frame, P-Block and T-Block (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-42351 Block 1 15001-
2 01010-80845 Bolt 2 15001-
3 01643-30823 Washer 2 15001-
4 02781-0021D Union 2 15001-
5 11Y-62-12330 Tee 1 15001-
6 07040-11409 Plug 1 15001-
7 02783-10210 Elbow 2 15001-
8 07002-11423 O-ring 6 15001-
9 02896-11008 O-ring 6 15001-
10 07040-11007 Plug 2 15001-
11 07002-11023 O-ring 2 15001-
12 21W-62-42351 Block 1 15001-
13 01010-80845 Bolt 2 15001-
14 01643-30823 Washer 2 15001-
15 02781-0021D Union 2 15001-
16 11Y-62-12230 Union 2 15001-
17 02782-10210 Elbow 1 15001-
18 11Y-62-12510 Elbow 1 15001-
19 07002-11423 O-ring 6 15001-
20 02896-11008 O-ring 5 15001-
21 02896-11009 O-ring 1 15001-
22 07040-11007 Plug 2 15001-
23 07002-11023 O-ring 2 15001-

Reference:K1110-012022 Page:K022023
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000773

Reference:K1110-012023 Page:K022024

PC78US-8 S/N 15001-UP


Floor Frame, Plug (#15001-)
Index Code Part Number Description Qty Serial No.
1 22U-54-25590 Grommet 1 15001-

Reference:K1110-012023 Page:K022024
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY017767
28 27

23

24

12
18 20
22

16 25 19
26
17
15 13
11
21 29
14

18

17
15
1
2
3
4
6
5
7
10
9
8

Reference:K1110-012024 Page:K022025

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Swing and Attachment (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-04290 Valve, Pilot 1 15001-
1 C1 Valve Body 1 15001-
2 C1 Valve 2 15001-
3 702-16-51140 Shim, T=0.30mm 2 15001-
702-16-54670 Shim, T=0.20mm 4 15001-
4 702-16-54550 Spring, L=22.73mm 2 15001-
5 702-16-54571 Retainer, T=5.9mm 2 15001-
6 702-16-54560 Spring 2 15001-
7 702-16-53170 Piston 2 15001-
8 702-16-51270 Seal 2 15001-
9 702-16-54580 Collar 2 15001-
10 702-16-54590 O-ring 2 15001-
11 C1 Lever 1 15001-
12 C1 Plate 1 15001-
13 C1 Shaft 1 15001-
14 702-16-54641 Boot 1 15001-
15 01252-30625 Bolt 2 15001-
16 702-16-54660 Plate 1 15001-
17 702-16-54650 Plate 2 15001-
702-16-54670 Shim, T=0.20mm 4 15001-
18 702-21-07610 Valve, Solenoid 1 15001-
19 702-21-53680 O-ring 1 15001-
20 702-21-55620 Plug 1 15001-
21 702-21-53330 Screw 2 15001-
22 07002-11423 O-ring 1 15001-
23 700-22-11410 O-ring 2 15001-
24 702-21-39450 O-ring 1 15001-
25 07000-11008 O-ring 1 15001-
26 07000-12012 O-ring 1 15001-
27 C1 Body 1 15001-
Reference:K1110-012024 Page:K022025
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, PPC Valve for Swing and Attachment (#15001-)
Index Code Part Number Description Qty Serial No.
28 01252-60612 Bolt, Hexagon Socket Head 3 15001-
29 203-60-62220 Bolt 2 15001-

Reference:K1110-012024 Page:K022025
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001531
18

6
7 8
5 1
10
9
4

16
17

14

15

22
2 20 21
3 27
2 20
3 19
30 21
29
28
31 26
33
32 20 25
20
23
24
21 21

11
11
13
13 12
12

Reference:K1110-012025 Page:K022026

PC78US-8 S/N 15001-UP


Floor Frame, Work Equipment Offset Control Pedal (#15001-)
Index Code Part Number Description Qty Serial No.
1 22U-43-21470 Seat 1 15001-
2 01010-81025 Bolt 2 15001-
3 01643-31032 Washer 2 15001-
4 01583-11408 Nut 1 15001-
5 20Y-62-25360 Bracket 1 15565-
22P-43-13620 Bracket 1 15001-15564
6 01010-81025 Bolt 2 15001-
7 01643-31032 Washer 2 15001-
8 22B-43-23730 Pedal 1 15001-
9 01010-D1045 Bolt 2 15001-
10 01643-71032 Washer 2 15001-
11 22B-43-23620 Plate 2 15001-
12 01010-81020 Bolt 4 15001-
13 01643-31032 Washer 4 15001-
22P-43-13691 Plate 1 15001-
14 C1 Plate 1 15001-
15 22B-43-23650 Sheet 1 15001-
16 01010-81020 Bolt 2 15001-
17 01643-31032 Washer 2 15001-
18 207-43-81240 Cap 1 15001-
19 21W-62-43980 Elbow 1 15001-
20 07000-12011 O-ring 4 15001-
21 02896-11008 O-ring 4 15001-
22 21W-62-43990 Elbow 1 15001-
23 21W-62-41780 Nipple 1 15001-
24 11Y-62-12140 Nipple 1 15001-
25 21W-62-51910 Hose 1 15001-
26 21W-62-51920 Hose 1 15001-
27 04434-51010 Clip 1 15001-
28 01010-81020 Bolt 1 15001-
Reference:K1110-012025 Page:K022026
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Frame, Work Equipment Offset Control Pedal (#15001-)
Index Code Part Number Description Qty Serial No.
29 01643-31032 Washer 1 15001-
30 20Y-01-21260 Spacer 1 15001-
31 04434-50610 Clip 1 15001-
32 01010-81040 Bolt 1 15001-
33 01643-31032 Washer 1 15001-

Reference:K1110-012025 Page:K022026
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
@@5X114@
12
18

16
17
15
13
11

14

17 2
15
3
4

5
7

10
9
8

Reference:K1110-012026 Page:K022027

PC78US-8 S/N 15001-UP


Floor Frame, PPC Valve for Blade (#15001-)
Index Code Part Number Description Qty Serial No.
702-16-01270 Valve Assembly, PPC 1 15872-
702-16-01600 Valve Assembly, PPC 1 15001-15871
1 C1 Body 1 15001-
2 C1 Valve 2 15001-
3 702-16-51140 Shim, T=0.30mm 2 15001-
702-16-54670 Shim, T=0.20mm 4 15001-
4 702-16-54550 Spring, L=22.73mm 2 15001-
5 702-16-54571 Retainer, T=5.9mm 2 15001-
6 702-16-54560 Spring 2 15872-
702-16-54160 Spring 2 15001-15871
7 702-16-53170 Piston 2 15001-
8 702-16-51270 Seal 2 15001-
9 702-16-54580 Collar 2 15001-
10 702-16-54590 O-ring 2 15001-
11 C1 Lever 1 15001-
12 C1 Plate 1 15001-
13 C1 Shaft 1 15001-
14 702-16-54641 Boot 1 15001-
15 01252-30625 Bolt 2 15872-
01252-60625 Bolt 2 15001-15871
16 702-16-54660 Plate 1 15001-
17 702-16-54650 Plate 2 15001-
702-16-54670 Shim, T=0.20mm 4 15001-
18 702-16-54880 Filter 1 15001-

Reference:K1110-012026 Page:K022027
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA018048
11

12

7 6 24
8 23 21

10 9
1
20
2
19 25
17 22
18
20
21
14
13 24 25
23 22
16

15

27 26

4
5 3

Reference:K1110-012027 Page:K022028

PC78US-8 S/N 15001-UP


Floor Frame, Blade Control Lever (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-D1025 Bolt 2 15001-
2 01643-71032 Washer 2 15001-
3 22P-43-13310 Bracket 1 15001-
4 01010-81040 Bolt 2 15001-
5 01643-31032 Washer 2 15001-
6 22B-43-33181 Lever 1 28941-
A2 22B-43-33180 Lever 1 19769-28940
A2 22P-43-13330 Lever 1 15001-19768
7 01010-D0825 Bolt 2 15001-
8 01643-70823 Washer 2 15001-
9 01583-11408 Nut 1 15001-
10 22U-43-21730 Seat 1 15001-
11 20T-43-71110 Knob 1 15001-
12 20T-43-71190 Nut 1 15001-
13 21W-62-42370 Elbow 1 15001-
14 07000-12011 O-ring 1 15001-
15 21W-62-42370 Elbow 1 15001-
16 07000-12011 O-ring 1 15001-
17 11Y-62-12140 Nipple 2 15001-
18 07000-12011 O-ring 2 15001-
19 02896-11008 O-ring 2 15001-
20 02760-00215 Hose, Face Seal Type, Red 1 15001-
21 21W-62-53360 Hose 1 15001-
22 20Y-62-22850 Band, Green 2 15001-
23 20Y-62-22830 Band, White 2 15001-
24 20Y-62-22820 Band, Blue 2 15001-
25 20Y-62-22790 Band, Red 2 15001-
26 22B-43-23580 Sheet 1 15001-
27 22B-54-16461 Rivet 2 15001-

Reference:K1110-012027 Page:K022028
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Floor Mounting
FIG. Name FIG. No.
Floor Mounting K1120-001001

Reference:X22-1031531 Page:K023000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002236
19
25 29

4 30

14

18
20

1
7 27

11 23

15

26
24

8
5
13
6
14 8
12
3
10
6 22
28
2 17
21
16

Reference:K1120-001001 Page:K023001

PC78US-8 S/N 15001-UP


Floor Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-53-18831 Plate 1 15001-
2 22P-53-18831 Plate 1 15001-
3 22P-53-18981 Plate 1 15001-
4 22P-53-18871 Plate 1 15001-
5 22P-53-18821 Cushion 1 15001-
6 22P-53-18821 Cushion 2 15001-
7 22P-53-18821 Cushion 1 15001-
8 22P-53-18891 Cushion 2 15001-
9 22P-53-18861 Cushion 1 15001-
10 22P-53-18861 Cushion 1 15001-
11 07000-13025 O-ring 3 15001-
12 07000-13025 O-ring 3 15001-
13 07000-13025 O-ring 3 15001-
14 07000-13035 O-ring 3 15001-
15 22P-53-18810 Collar 1 15001-
16 21W-54-42270 Bolt 1 15001-
17 21W-54-42270 Bolt 1 15001-
18 01011-81610 Bolt 1 15001-
19 01010-82055 Bolt 1 15001-
20 01643-31645 Washer 1 15001-
21 01643-31645 Washer 1 15001-
22 01643-31645 Washer 1 15001-
23 01643-31645 Washer 1 15001-
24 01643-31645 Washer 1 15001-
25 01643-32060 Washer 1 15001-
26 01580-11613 Nut 1 15001-
27 01580-11613 Nut 1 15001-
28 22P-53-18720 Plate 1 15001-
29 01010-81235 Bolt 6 15001-
30 01643-31232 Washer 6 15001-
Reference:K1120-001001 Page:K023001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Front Cover
FIG. Name FIG. No.
Front Cover, Cab In Parts, Monitor and Cover K1740-001001
Front Cover, Cab In Parts, Front Cover and Switch K1740-001002
Front Cover, Clamp K1740-001003

Reference:X22-1090700 Page:K024000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001463
7

1
6
5
9

12
21
22 8
20
39
11 41
24 40
25 15 10
27
19
26
4
3
2

23

17 31
30
29
18
16 35
42
37 28

32

14

13

33
34
38 37
36 35

Reference:K1740-001001 Page:K024001

PC78US-8 S/N 15001-UP


Front Cover, Cab In Parts, Monitor and Cover (#15001-)
Index Code Part Number Description Qty Serial No.
1 7835-31-3017 Monitor 1 28941-
A2 7835-31-3016 Monitor 1 16893-28940
A2 7835-31-3015 Monitor 1 16757-16892
A2 7835-31-3014 Monitor 1 16642-16756
7835-31-3013 Monitor 1 16305-16641
7835-31-3012 Monitor 1 15872-16304
7835-31-3011 Monitor 1 15655-15871
7835-31-3010 Monitor 1 15525-15654
7835-31-3009 Monitor 1 15210-15524
7835-31-3008 Monitor 1 15001-15209
2 01010-80616 Bolt 4 15001-
3 01643-30623 Washer 4 15001-
4 209-72-12230 Washer 4 15001-
5 20Y-00-41330 Plate 1 15001-
6 22B-54-25190 Trim 1 15001-
7 20Y-53-12810 Cover 1 15001-
8 22P-06-11851 Cable 1 15001-
9 22B-54-28990 Sheet 3 15001-
10 20Y-53-12111 Cover 1 15001-
11 20Y-53-12240 Louver 1 15001-
12 20Y-06-23472 Cigarette Lighter 1 15001-
13 20Y-53-12122 Cover 1 15001-
14 22U-54-25360 Clip 2 21872-
A1 22U-54-25340 Clip 2 15001-21871
15 22B-54-25151 Cover 1 15001-
16 22B-979-2300 Duct 1 15001-
17 20Y-53-13480 Seal 1 15001-
18 20Y-53-13280 Seal 1 15001-
19 208-53-11941 Seal 1 15001-
20 20Y-53-12310 Collar 1 15001-
Reference:K1740-001001 Page:K024001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Front Cover, Cab In Parts, Monitor and Cover (#15001-)
Index Code Part Number Description Qty Serial No.
21 01010-80620 Bolt 1 15001-
22 01643-30623 Washer 1 15001-
23 20Y-53-13411 Duct 1 15001-
24 208-53-11920 Seal 1 15001-
25 20Y-53-12310 Collar 1 15001-
26 01010-80620 Bolt 1 15001-
27 01643-30623 Washer 1 15001-
28 20Y-53-12172 Grille 1 15001-
29 01010-80620 Bolt 4 15001-
30 01643-30623 Washer 4 15001-
31 209-72-12230 Washer 4 15001-
32 20Y-53-12310 Collar 1 15001-
33 20Y-53-12310 Collar 1 15001-
34 20Y-43-41290 Collar 1 15001-
35 01245-00616 Screw 2 15001-
36 01245-00616 Screw 1 15001-
37 01643-70623 Washer 2 15001-
38 01643-70623 Washer 1 15001-
39 20Y-43-41290 Collar 1 15001-
40 01245-00616 Screw 1 15001-
41 01643-70623 Washer 1 15001-
42 20Y-53-12291 Cap 1 15001-

Reference:K1740-001001 Page:K024001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000700
1
15

17
19
18

24
25
23
16
3
7
8
4
20 4
22
21 3

11
10 13
9 2
14 6
11
5 10
9
12
6

Reference:K1740-001002 Page:K024002

PC78US-8 S/N 15001-UP


Front Cover, Cab In Parts, Front Cover and Switch (#15001-)
Index Code Part Number Description Qty Serial No.
1 20Y-979-6161 Sensor, Sunlight 1 15001-
2 21W-43-51110 Cover Assembly 1 15001-
3 22B-43-23510 Seal 2 15001-
4 22B-43-23520 Seal 2 15001-
5 20Y-979-6630 Catcher 1 15001-
6 22U-43-21340 Sheet 2 15001-
7 01245-00820 Screw 2 15001-
8 01643-70823 Washer 2 15001-
9 01245-00820 Screw 2 15001-
10 01643-70823 Washer 2 15001-
11 22P-43-13410 Collar 2 15001-
12 22B-43-23490 Bracket 1 15001-
13 01245-00820 Screw 1 15001-
14 01643-70823 Washer 1 15001-
15 22B-54-25310 Cover Assembly 1 15001-
16 22B-54-25560 Seal 1 15001-
17 20Y-43-41290 Collar 3 15001-
18 01245-00616 Screw 3 15001-
19 01643-70623 Washer 3 15001-
20 20Y-53-12310 Collar 2 15001-
21 01010-80616 Bolt 2 15001-
22 01643-30623 Washer 2 15001-
23 208-979-7540 Collar 1 15001-
24 01010-80825 Bolt 1 15001-
25 01643-30823 Washer 1 15001-

Reference:K1740-001002 Page:K024002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA021220

7
6

6
7

9
10 3
8 5
4
4

5
2
1 3
3
2
3
2
2

5
4

Reference:K1740-001003 Page:K024003

PC78US-8 S/N 15001-UP


Front Cover, Clamp (#15001-)
Index Code Part Number Description Qty Serial No.
1 08211-01520 Clip 2 15001-
2 08034-20519 Band 5 15001-
3 581-04-22290 Clip 4 15001-
4 01010-81020 Bolt 4 15001-
5 01643-31032 Washer 4 15001-
6 01010-80812 Bolt 4 15001-
7 01643-30823 Washer 4 15001-
8 22P-53-13241 Cover 1 15001-
9 01010-D0825 Bolt 2 15001-
10 01643-70823 Washer 2 15001-

Reference:K1740-001003 Page:K024003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
GUARDS AND COVERS
Unit Name Unit No.
Hood, Without Dust-proof Net, Woody X22-1030372
Hood, Without Dust-proof Net, Woody X22-1030373
Hood, Without Dust-proof Net, Woody, For EU Arrangement X22-1039650
Hood, With Dust-proof Net, Woody X22-1037130
Hood, With Dust-proof Net, Woody X22-1037131
Hood, With Dust-proof Net, Woody, For EU Arrangement X22-1090830
Left Side Cover, Without Dust-proof Net, Woody X22-1035151
Left Side Cover, With Battery Disconnect Switch, Without Dust-proof Net, Woody X22-1039660
Left Side Cover, With Dust-proof Net, Woody X22-1090810
Left Side Cover, With Dust-proof Net, Woody, Battery Disconnect Switch X22-1090840
Right Side Cover X22-1038990
Machine Cab Partition, Without Rearview Camera X22-1036031
Machine Cab Partition, With Water Separator and Additional Fuel Filter X22-1099620
Battery Case X22-1039010
Front Cover, For Machine Without Additional Actuator Piping X22-1039020
Front Cover, With 1-Additional Actuator Piping X22-1039030
Rearview Mirror L.H., L.H. X22-1030421
Rearview Mirror R.H., R.H. X22-1030432
Counterweight, Weight 830 kg X22-1030441
Counterweight, Weight, 732 kg X22-1039040
Additional Counterweight, 218kg X22-1030451
Counterweight Cover X22-1037500
Under Cover X22-1036021

Reference: Page:M000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hood, Without Dust-proof Net, Woody
FIG. Name FIG. No.
Hood, Hood Sheet M1110-001001
Hood, Bracket M1110-001002

Reference:X22-1030372 Page:M001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000488
17

18
1

22
14
11

10
16 12
23 9 13
15

30
24
31
33
2
32
21
25
19 5
20
29 4

28 3 27 2

26 4

34
36 6 7
35

Reference:M1110-001001 Page:M001001

PC78US-8 S/N 15001-UP


Hood, Hood Sheet (#15001-15871)
Index Code Part Number Description Qty Serial No.
1 22P-54-11211 Hood 1 15001-15871
2 22P-54-12770 Hinge 2 15001-15871
3 01010-81020 Bolt 4 15001-15871
4 01643-31032 Washer 4 15001-15871
5 22P-54-11222 Cover 1 15001-15871
6 01010-81020 Bolt 4 15001-15871
7 01643-31032 Washer 4 15001-15871
8 22P-54-11982 Bracket 1 15001-15871
9 01010-81020 Bolt 2 15001-15871
10 01643-31032 Washer 2 15001-15871
11 22P-54-11180 Lock Assembly 1 15001-15871
12 01010-81020 Bolt 2 15001-15871
13 01643-31032 Washer 2 15001-15871
14 22P-54-12830 Cover 1 15001-15871
15 20Y-54-11611 Stopper 3 15001-15871
16 01580-11008 Nut 3 15001-15871
17 22P-54-12440 Seal 1 15001-15871
18 22P-54-12450 Seal 1 15001-15871
19 22P-54-12251 Sheet 1 15001-15871
20 22P-54-12261 Sheet 1 15001-15871
21 22P-54-12271 Sheet 1 15001-15871
22 22P-54-12292 Sheet 1 15871-15871
A2 22P-54-12290 Sheet 1 15001-15871
23 22P-54-12381 Sheet 1 15001-15871
24 22P-54-12391 Sheet 1 15001-15871
25 22P-54-12890 Frame 1 15001-15871
26 01010-81020 Bolt 2 15001-15871
27 01643-31032 Washer 2 15001-15871
28 01010-80820 Bolt 2 15001-15871
29 01643-30823 Washer 2 15001-15871
Reference:M1110-001001 Page:M001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hood, Hood Sheet (#15001-15871)
Index Code Part Number Description Qty Serial No.
30 22P-54-12840 Cover 1 15001-15871
31 09817-A0753 Plate, Warning, High Temperature 1 15001-15871
32 01010-80820 Bolt 4 15001-15871
33 01643-30823 Washer 4 15001-15871
34 22P-54-12930 Bracket 1 15001-15871
35 01010-81020 Bolt 2 15001-15871
36 01643-31032 Washer 2 15001-15871

Reference:M1110-001001 Page:M001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000489
1
2

6 1
2

13
12
9 8 7
4
11
10 5
15
3
16
14

Reference:M1110-001002 Page:M001002

PC78US-8 S/N 15001-UP


Hood, Bracket (#15001-15871)
Index Code Part Number Description Qty Serial No.
1 01010-81025 Bolt 4 15001-15871
2 203-54-56970 Washer 4 15001-15871
3 22P-54-11924 Bracket 1 15871-15871
A2 22P-54-11923 Bracket 1 15401-15871
A2 22P-54-11922 Bracket 1 15001-15400
4 01010-81025 Bolt 2 15001-15871
5 203-54-56970 Washer 2 15001-15871
6 22P-54-11992 Rod 1 15401-15871
22P-54-11991 Rod 1 15001-15400
7 01643-31032 Washer 1 15001-15871
8 04050-12015 Pin, Cotter 1 15001-15871
9 22P-54-12212 Bracket 1 15871-15871
22P-54-12211 Bracket 1 15001-15871
10 01010-81020 Bolt 1 15001-15871
11 01643-31032 Washer 1 15001-15871
12 20R-54-11460 Spring 1 15001-15871
13 01023-10508 Screw 2 15001-15871
14 22P-54-12980 Bracket 1 15001-15871
15 01010-81025 Bolt 1 15001-15871
16 01643-31032 Washer 1 15001-15871

Reference:M1110-001002 Page:M001002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hood, Without Dust-proof Net, Woody
FIG. Name FIG. No.
Hood, Hood Sheet M1110-007001
Hood, Bracket M1110-007002

Reference:X22-1030373 Page:M002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA005574
17

18
1

22
14
11

10
16 12
9 13
23
15
30
24
31
33
2
32
21
25
19 5
20
29 4
28 3 27 2

26 4

34
36 6 7
35

Reference:M1110-007001 Page:M002001

PC78US-8 S/N 15001-UP


Hood, Hood Sheet (#15872-)
Index Code Part Number Description Qty Serial No.
1 22P-54-11211 Hood 1 15872-
2 22P-54-12770 Hinge 2 15872-
3 01010-81020 Bolt 4 15872-
4 01643-31032 Washer 4 15872-
5 22P-54-11222 Cover 1 15872-
6 01010-81020 Bolt 4 15872-
7 01643-31032 Washer 4 15872-
8 22P-54-11983 Bracket 1 15872-
9 01010-81020 Bolt 2 15872-
10 01643-31032 Washer 2 15872-
11 22P-54-11181 Lock Assembly 1 15872-
12 01010-81025 Bolt 2 15872-
13 01643-31032 Washer 2 15872-
14 22P-54-12830 Cover 1 15872-
15 20Y-54-11611 Stopper 3 15872-
16 01580-11008 Nut 3 15872-
17 22P-54-12440 Seal 1 15872-
18 22P-54-12450 Seal 1 15872-
19 22P-54-12251 Sheet 1 15872-
20 22P-54-12261 Sheet 1 15872-
21 22P-54-12271 Sheet 1 15872-
22 22P-54-12292 Sheet 1 15872-
23 22P-54-12381 Sheet 1 15872-
24 22P-54-12391 Sheet 1 15872-
25 22P-54-12890 Frame 1 15872-
26 01010-81020 Bolt 2 15872-
27 01643-31032 Washer 2 15872-
28 01010-80820 Bolt 2 15872-
29 01643-30823 Washer 2 15872-
30 22P-54-12840 Cover 1 15872-
Reference:M1110-007001 Page:M002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hood, Hood Sheet (#15872-)
Index Code Part Number Description Qty Serial No.
31 09817-A0753 Plate, Warning, High Temperature 1 15872-
32 01010-80820 Bolt 4 15872-
33 01643-30823 Washer 4 15872-
34 22P-54-12930 Bracket 1 15872-
35 01010-81020 Bolt 2 15872-
36 01643-31032 Washer 2 15872-

Reference:M1110-007001 Page:M002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000489
1
2

6 1
2

13
12
9 8 7
4
11
10 5
15
3
16
14

Reference:M1110-007002 Page:M002002

PC78US-8 S/N 15001-UP


Hood, Bracket (#15872-)
Index Code Part Number Description Qty Serial No.
1 01010-81025 Bolt 4 15872-
2 203-54-56970 Washer 4 15872-
3 22P-54-11924 Bracket 1 15872-
4 01010-81025 Bolt 2 15872-
5 203-54-56970 Washer 2 15872-
6 22P-54-11992 Rod 1 15872-
7 01643-31032 Washer 1 15872-
8 04050-12015 Pin, Cotter 1 15872-
9 22P-54-12212 Bracket 1 15872-
10 01010-81020 Bolt 1 15872-
11 01643-31032 Washer 1 15872-
12 20R-54-11460 Spring 1 15872-
13 01023-10508 Screw 2 15872-
14 22P-54-12980 Bracket 1 15872-
15 01010-81025 Bolt 1 15872-
16 01643-31032 Washer 1 15872-

Reference:M1110-007002 Page:M002002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hood, Without Dust-proof Net, Woody, For EU Arrangement
FIG. Name FIG. No.
Hood, Hood Sheet M1110-003001
Hood, Bracket M1110-003002

Reference:X22-1039650 Page:M003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002103
17

18
1

22
14
11

10
16 12
23 9 13
15

30
24
31
33 38
2
32 39

25 21
19
20 37
29 4
28 3 27 2

26 4

3 5

34
36 6 7
35

Reference:M1110-003001 Page:M003001

PC78US-8 S/N 15001-UP


Hood, Hood Sheet (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-54-11211 Hood 1 15001-
2 22P-54-12770 Hinge 2 15001-
3 01010-81020 Bolt 4 15001-
4 01643-31032 Washer 4 15001-
5 22P-54-11222 Cover 1 15001-
6 01010-81020 Bolt 4 15001-
7 01643-31032 Washer 4 15001-
8 22P-54-11983 Bracket 1 15872-
A2 22P-54-11982 Bracket 1 15001-15871
9 01010-81025 Bolt 2 15872-
01010-81020 Bolt 2 15001-15871
10 01643-31032 Washer 2 15001-
11 22P-54-11181 Lock Assembly 1 15872-
A2 22P-54-11180 Lock Assembly 1 15001-15871
12 01010-81020 Bolt 2 15001-
13 01643-31032 Washer 2 15001-
14 22P-54-12830 Cover 1 15001-
15 20Y-54-11611 Stopper 3 15001-
16 01580-11008 Nut 3 15001-
17 22P-54-12440 Seal 1 15001-
18 22P-54-12450 Seal 1 15001-
19 22P-54-12251 Sheet 1 15001-
20 22P-54-12261 Sheet 1 15001-
21 22P-54-12271 Sheet 1 15001-
22 22P-54-12292 Sheet 1 15872-
A2 22P-54-12290 Sheet 1 15001-15871
23 22P-54-12381 Sheet 1 15001-
24 22P-54-12391 Sheet 1 15001-
25 22P-54-12890 Frame 1 15001-
26 01010-81020 Bolt 2 15001-
Reference:M1110-003001 Page:M003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hood, Hood Sheet (#15001-)
Index Code Part Number Description Qty Serial No.
27 01643-31032 Washer 2 15001-
28 01010-80820 Bolt 2 15001-
29 01643-30823 Washer 2 15001-
30 22P-54-12840 Cover 1 15001-
31 09817-A0753 Plate, Warning, High Temperature 1 15001-
32 01010-80820 Bolt 4 15001-
33 01643-30823 Washer 4 15001-
34 22P-54-12930 Bracket 1 15001-
35 01010-81020 Bolt 2 15001-
36 01643-31032 Washer 2 15001-
37 21W-54-51420 Sheet 1 15001-
38 21W-54-51430 Sheet 1 15001-
39 21W-54-51440 Sheet 1 15001-

Reference:M1110-003001 Page:M003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000489
1
2

6 1
2

13
12
9 8 7
4
11
10 5
15
3
16
14

Reference:M1110-003002 Page:M003002

PC78US-8 S/N 15001-UP


Hood, Bracket (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81025 Bolt 4 15001-
2 203-54-56970 Washer 4 15001-
3 22P-54-11924 Bracket 1 15872-
A2 22P-54-11923 Bracket 1 15401-15871
A2 22P-54-11922 Bracket 1 15001-15400
4 01010-81025 Bolt 2 15001-
5 203-54-56970 Washer 2 15001-
6 22P-54-11992 Rod 1 15401-
22P-54-11991 Rod 1 15001-15400
7 01643-31032 Washer 1 15001-
8 04050-12015 Pin, Cotter 1 15001-
9 22P-54-12212 Bracket 1 15872-
22P-54-12211 Bracket 1 15001-15871
10 01010-81020 Bolt 1 15001-
11 01643-31032 Washer 1 15001-
12 20R-54-11460 Spring 1 15001-
13 01023-10508 Screw 2 15001-
14 22P-54-12980 Bracket 1 15001-
15 01010-81025 Bolt 1 15001-
16 01643-31032 Washer 1 15001-

Reference:M1110-003002 Page:M003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hood, With Dust-proof Net, Woody
FIG. Name FIG. No.
Hood, Hood Sheet M1110-002001
Hood, Bracket M1110-002002

Reference:X22-1037130 Page:M004000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002104
17

18
1

22
14
11

10
16 12
23 9 13
15

30
24
31
33
2
32
21
25
19 5
20
29 4
28 3 27 2

26 4

34
36 6 7
35

Reference:M1110-002001 Page:M004001

PC78US-8 S/N 15001-UP


Hood, Hood Sheet (#15001-15871)
Index Code Part Number Description Qty Serial No.
1 22P-54-11211 Hood 1 15001-15871
2 22P-54-12770 Hinge 2 15001-15871
3 01010-81020 Bolt 4 15001-15871
4 01643-31032 Washer 4 15001-15871
5 22P-54-13220 Cover 1 15001-15871
6 01010-81020 Bolt 4 15001-15871
7 01643-31032 Washer 4 15001-15871
8 22P-54-11982 Bracket 1 15001-15871
9 01010-81020 Bolt 2 15001-15871
10 01643-31032 Washer 2 15001-15871
11 22P-54-11180 Lock Assembly 1 15001-15871
12 01010-81020 Bolt 2 15001-15871
13 01643-31032 Washer 2 15001-15871
14 22P-54-12830 Cover 1 15001-15871
15 20Y-54-11611 Stopper 3 15001-15871
16 01580-11008 Nut 3 15001-15871
17 22P-54-12440 Seal 1 15001-15871
18 22P-54-12450 Seal 1 15001-15871
19 22P-54-12251 Sheet 1 15001-15871
20 22P-54-12261 Sheet 1 15001-15871
21 22P-54-12271 Sheet 1 15001-15871
22 22P-54-12292 Sheet 1 15871-15871
A2 22P-54-12290 Sheet 1 15001-15871
23 22P-54-12381 Sheet 1 15001-15871
24 22P-54-12391 Sheet 1 15001-15871
25 22P-54-12890 Frame 1 15001-15871
26 01010-81020 Bolt 2 15001-15871
27 01643-31032 Washer 2 15001-15871
28 01010-80820 Bolt 2 15001-15871
29 01643-30823 Washer 2 15001-15871
Reference:M1110-002001 Page:M004001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hood, Hood Sheet (#15001-15871)
Index Code Part Number Description Qty Serial No.
30 22P-54-12840 Cover 1 15001-15871
31 09817-A0753 Plate, Warning, High Temperature 1 15001-15871
32 01010-80820 Bolt 4 15001-15871
33 01643-30823 Washer 4 15001-15871
34 22P-54-12930 Bracket 1 15001-15871
35 01010-81020 Bolt 2 15001-15871
36 01643-31032 Washer 2 15001-15871

Reference:M1110-002001 Page:M004001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000489
1
2

6 1
2

13
12
9 8 7
4
11
10 5
15
3
16
14

Reference:M1110-002002 Page:M004002

PC78US-8 S/N 15001-UP


Hood, Bracket (#15001-15871)
Index Code Part Number Description Qty Serial No.
1 01010-81025 Bolt 4 15001-15871
2 203-54-56970 Washer 4 15001-15871
3 22P-54-11924 Bracket 1 15871-15871
A2 22P-54-11923 Bracket 1 15001-15871
4 01010-81025 Bolt 2 15001-15871
5 203-54-56970 Washer 2 15001-15871
6 22P-54-11992 Rod 1 15001-15871
7 01643-31032 Washer 1 15001-15871
8 04050-12015 Pin, Cotter 1 15001-15871
9 22P-54-12212 Bracket 1 15871-15871
22P-54-12211 Bracket 1 15001-15871
10 01010-81020 Bolt 1 15001-15871
11 01643-31032 Washer 1 15001-15871
12 20R-54-11460 Spring 1 15001-15871
13 01023-10508 Screw 2 15001-15871
14 22P-54-12980 Bracket 1 15001-15871
15 01010-81025 Bolt 1 15001-15871
16 01643-31032 Washer 1 15001-15871

Reference:M1110-002002 Page:M004002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hood, With Dust-proof Net, Woody
FIG. Name FIG. No.
Hood, Hood Sheet M1110-008001
Hood, Bracket M1110-008002

Reference:X22-1037131 Page:M005000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA005575
17

18
1

22
14
11

10
16 12
9 13
23
15
30
24
31
33
2
32
21
25
19 5
20
29 4
28 3 27 2

26 4

34
36 6 7
35

Reference:M1110-008001 Page:M005001

PC78US-8 S/N 15001-UP


Hood, Hood Sheet (#15872-)
Index Code Part Number Description Qty Serial No.
1 22P-54-11211 Hood 1 15872-
2 22P-54-12770 Hinge 2 15872-
3 01010-81020 Bolt 4 15872-
4 01643-31032 Washer 4 15872-
5 22P-54-13220 Cover 1 15872-
6 01010-81020 Bolt 4 15872-
7 01643-31032 Washer 4 15872-
8 22P-54-11983 Bracket 1 15872-
9 01010-81020 Bolt 2 15872-
10 01643-31032 Washer 2 15872-
11 22P-54-11181 Lock Assembly 1 15872-
12 01010-81025 Bolt 2 15872-
13 01643-31032 Washer 2 15872-
14 22P-54-12830 Cover 1 15872-
15 20Y-54-11611 Stopper 3 15872-
16 01580-11008 Nut 3 15872-
17 22P-54-12440 Seal 1 15872-
18 22P-54-12450 Seal 1 15872-
19 22P-54-12251 Sheet 1 15872-
20 22P-54-12261 Sheet 1 15872-
21 22P-54-12271 Sheet 1 15872-
22 22P-54-12292 Sheet 1 15872-
23 22P-54-12381 Sheet 1 15872-
24 22P-54-12391 Sheet 1 15872-
25 22P-54-12890 Frame 1 15872-
26 01010-81020 Bolt 2 15872-
27 01643-31032 Washer 2 15872-
28 01010-80820 Bolt 2 15872-
29 01643-30823 Washer 2 15872-
30 22P-54-12840 Cover 1 15872-
Reference:M1110-008001 Page:M005001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hood, Hood Sheet (#15872-)
Index Code Part Number Description Qty Serial No.
31 09817-A0753 Plate, Warning, High Temperature 1 15872-
32 01010-80820 Bolt 4 15872-
33 01643-30823 Washer 4 15872-
34 22P-54-12930 Bracket 1 15872-
35 01010-81020 Bolt 2 15872-
36 01643-31032 Washer 2 15872-

Reference:M1110-008001 Page:M005001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000489
1
2

6 1
2

13
12
9 8 7
4
11
10 5
15
3
16
14

Reference:M1110-008002 Page:M005002

PC78US-8 S/N 15001-UP


Hood, Bracket (#15872-)
Index Code Part Number Description Qty Serial No.
1 01010-81025 Bolt 4 15872-
2 203-54-56970 Washer 4 15872-
3 22P-54-11924 Bracket 1 15872-
4 01010-81025 Bolt 2 15872-
5 203-54-56970 Washer 2 15872-
6 22P-54-11992 Rod 1 15872-
7 01643-31032 Washer 1 15872-
8 04050-12015 Pin, Cotter 1 15872-
9 22P-54-12212 Bracket 1 15872-
10 01010-81020 Bolt 1 15872-
11 01643-31032 Washer 1 15872-
12 20R-54-11460 Spring 1 15872-
13 01023-10508 Screw 2 15872-
14 22P-54-12980 Bracket 1 15872-
15 01010-81025 Bolt 1 15872-
16 01643-31032 Washer 1 15872-

Reference:M1110-008002 Page:M005002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hood, With Dust-proof Net, Woody, For EU Arrangement
FIG. Name FIG. No.
Hood, Hood Sheet M1110-004001
Hood, Bracket M1110-004002

Reference:X22-1090830 Page:M006000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002105
17

18
1

22
14
11

10
16 12
23 9 13
15

30
24
31
33 38
2
32 39

25 21
19
20 37
29 4
28 3 27 2 5
26 4

34
36 6 7
35

Reference:M1110-004001 Page:M006001

PC78US-8 S/N 15001-UP


Hood, Hood Sheet (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-54-11211 Hood 1 15001-
2 22P-54-12770 Hinge 2 15001-
3 01010-81020 Bolt 4 15001-
4 01643-31032 Washer 4 15001-
5 22P-54-13220 Cover 1 15001-
6 01010-81020 Bolt 4 15001-
7 01643-31032 Washer 4 15001-
8 22P-54-11983 Bracket 1 15872-
A2 22P-54-11982 Bracket 1 15001-15871
9 01010-81025 Bolt 2 15872-
01010-81020 Bolt 2 15001-15871
10 01643-31032 Washer 2 15001-
11 22P-54-11181 Lock Assembly 1 15872-
A2 22P-54-11180 Lock Assembly 1 15001-15871
12 01010-81020 Bolt 2 15001-
13 01643-31032 Washer 2 15001-
14 22P-54-12830 Cover 1 15001-
15 20Y-54-11611 Stopper 3 15001-
16 01580-11008 Nut 3 15001-
17 22P-54-12440 Seal 1 15001-
18 22P-54-12450 Seal 1 15001-
19 22P-54-12251 Sheet 1 15001-
20 22P-54-12261 Sheet 1 15001-
21 22P-54-12271 Sheet 1 15001-
22 22P-54-12292 Sheet 1 15872-
A2 22P-54-12290 Sheet 1 15001-15871
23 22P-54-12381 Sheet 1 15001-
24 22P-54-12391 Sheet 1 15001-
25 22P-54-12890 Frame 1 15001-
26 01010-81020 Bolt 2 15001-
Reference:M1110-004001 Page:M006001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Hood, Hood Sheet (#15001-)
Index Code Part Number Description Qty Serial No.
27 01643-31032 Washer 2 15001-
28 01010-80820 Bolt 2 15001-
29 01643-30823 Washer 2 15001-
30 22P-54-12840 Cover 1 15001-
31 09817-A0753 Plate, Warning, High Temperature 1 15001-
32 01010-80820 Bolt 4 15001-
33 01643-30823 Washer 4 15001-
34 22P-54-12930 Bracket 1 15001-
35 01010-81020 Bolt 2 15001-
36 01643-31032 Washer 2 15001-
37 21W-54-51420 Sheet 1 15001-
38 21W-54-51430 Sheet 1 15001-
39 21W-54-51440 Sheet 1 15001-

Reference:M1110-004001 Page:M006001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000489
1
2

6 1
2

13
12
9 8 7
4
11
10 5
15
3
16
14

Reference:M1110-004002 Page:M006002

PC78US-8 S/N 15001-UP


Hood, Bracket (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81025 Bolt 4 15001-
2 203-54-56970 Washer 4 15001-
3 22P-54-11924 Bracket 1 15872-
A2 22P-54-11923 Bracket 1 15001-15871
4 01010-81025 Bolt 2 15001-
5 203-54-56970 Washer 2 15001-
6 22P-54-11992 Rod 1 15001-
7 01643-31032 Washer 1 15001-
8 04050-12015 Pin, Cotter 1 15001-
9 22P-54-12212 Bracket 1 15872-
22P-54-12211 Bracket 1 15001-15871
10 01010-81020 Bolt 1 15001-
11 01643-31032 Washer 1 15001-
12 20R-54-11460 Spring 1 15001-
13 01023-10508 Screw 2 15001-
14 22P-54-12980 Bracket 1 15001-
15 01010-81025 Bolt 1 15001-
16 01643-31032 Washer 1 15001-

Reference:M1110-004002 Page:M006002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Left Side Cover, Without Dust-proof Net, Woody
FIG. Name FIG. No.
Left Side Cover M1130-001001

Reference:X22-1035151 Page:M007000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001447
39
40 30 31
38 31
30
32 29
28

37
36
34 35 27 26 25
19 42 41
33

45

8
22
23 15
14
47 6
46
44 3
9 9
43 9 5
24
21 13
7 10
18 20 12 1 11
2
4 11

17 16

Reference:M1130-001001 Page:M007001

PC78US-8 S/N 15001-UP


Left Side Cover (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-54-11511 Cover 1 15001-
2 22P-54-12850 Cover, Welded 1 15001-
3 22P-54-12681 Stopper, Welded 1 15001-
4 20N-54-71440 Hinge, Welded 2 15001-
5 22P-54-12860 Cover 1 15001-
6 22P-54-12681 Stopper, Welded 1 15001-
7 20N-54-71440 Hinge, Welded 2 15001-
8 22P-54-12531 Sheet 1 15001-
9 21W-46-41530 Seal 4 15001-
10 22B-46-24361 Lock Assembly 1 15001-
11 08037-02512 Grommet 2 15001-
12 01010-81235 Bolt 3 15001-
13 175-54-34170 Washer 3 15001-
14 01010-81225 Bolt 1 15001-
15 01643-31232 Washer 1 15001-
16 01010-81235 Bolt 1 15001-
17 01643-31232 Washer 1 15001-
18 21W-54-51162 Cover 1 15444-
A2 21W-54-51161 Cover 1 15001-15443
19 22P-54-12411 Sheet 1 15001-
20 01010-81240 Bolt 1 15001-
21 175-54-34170 Washer 1 15001-
22 01010-81225 Bolt 1 15001-
23 01643-31232 Washer 1 15001-
24 22P-54-12230 Seal 1 15001-
25 22P-54-11111 Cover 1 15001-
26 22B-46-24180 Spring 1 15001-
27 01023-10512 Screw 2 15001-
28 20Y-54-29232 Bar 1 15001-
29 22P-54-11141 Hinge 1 15001-
Reference:M1130-001001 Page:M007001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Left Side Cover (#15001-)
Index Code Part Number Description Qty Serial No.
30 01010-81225 Bolt 4 15001-
31 01643-31232 Washer 4 15001-
32 22P-54-11881 Bracket 1 15001-
33 22P-54-11171 Cover 1 15001-
34 01010-81225 Bolt 2 15001-
35 01643-31232 Washer 2 15001-
36 22B-46-24361 Lock Assembly 1 15001-
37 08037-02512 Grommet 1 15001-
38 22P-54-12810 Bracket 1 15001-
39 01010-81225 Bolt 2 15001-
40 01643-31232 Washer 2 15001-
41 20Y-54-11611 Stopper 2 15001-
42 01580-11008 Nut 2 15001-
43 01010-81240 Bolt 3 15001-
44 175-54-34170 Washer 3 15001-
45 22P-54-12181 Bracket 1 15001-
46 01010-81245 Bolt 2 15691-
01010-81240 Bolt 2 15001-15690
47 175-54-34170 Washer 2 15001-

Reference:M1130-001001 Page:M007001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Left Side Cover, With Battery Disconnect Switch, Without Dust-proof Net, Woody
FIG. Name FIG. No.
Left Side Cover M1130-002001

Reference:X22-1039660 Page:M008000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002106
39
40 31 29
30
38 31
30
32
28
43

37
36
34 35 27 26 25
42 41
33

46

22 8
23 15
1
19 14
48 6
47
45 3
9 9
44 9
24
21 13
7 10
18 20 12 5 11
2
4 11

17 16

Reference:M1130-002001 Page:M008001

PC78US-8 S/N 15001-UP


Left Side Cover (#15001-15239)
Index Code Part Number Description Qty Serial No.
1 22P-54-11511 Cover 1 15001-15239
2 22P-54-12850 Cover 1 15001-15239
3 22P-54-12681 Stopper, Welded 1 15001-15239
4 20N-54-71440 Hinge, Welded 2 15001-15239
5 22P-54-12860 Cover 1 15001-15239
6 22P-54-12681 Stopper, Welded 1 15001-15239
7 20N-54-71440 Hinge, Welded 2 15001-15239
8 22P-54-12531 Sheet 1 15001-15239
9 21W-46-41530 Seal 4 15001-15239
10 22B-46-24361 Lock Assembly 1 15001-15239
11 08037-02512 Grommet 2 15001-15239
12 01010-81235 Bolt 3 15001-15239
13 175-54-34170 Washer 3 15001-15239
14 01010-81225 Bolt 1 15001-15239
15 01643-31232 Washer 1 15001-15239
16 01010-81235 Bolt 1 15001-15239
17 01643-31232 Washer 1 15001-15239
18 21W-54-51161 Cover 1 15001-15239
19 22P-54-12411 Sheet 1 15001-15239
20 01010-81240 Bolt 1 15001-15239
21 175-54-34170 Washer 1 15001-15239
22 01010-81225 Bolt 1 15001-15239
23 01643-31232 Washer 1 15001-15239
24 22P-54-12230 Seal 1 15001-15239
25 22P-54-11111 Cover 1 15001-15239
26 22B-46-24180 Spring 1 15001-15239
27 01023-10512 Screw 2 15001-15239
28 20Y-54-29232 Bar 1 15001-15239
29 22P-54-11141 Hinge 1 15001-15239
30 01010-81225 Bolt 4 15001-15239
Reference:M1130-002001 Page:M008001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Left Side Cover (#15001-15239)
Index Code Part Number Description Qty Serial No.
31 01643-31232 Washer 4 15001-15239
32 22P-54-11881 Bracket 1 15001-15239
33 22P-54-11171 Cover 1 15001-15239
34 01010-81225 Bolt 2 15001-15239
35 01643-31232 Washer 2 15001-15239
36 22B-46-24361 Lock Assembly 1 15001-15239
37 08037-02512 Grommet 1 15001-15239
38 22P-54-12810 Bracket 1 15001-15239
39 01010-81225 Bolt 2 15001-15239
40 01643-31232 Washer 2 15001-15239
41 20Y-54-11611 Stopper 2 15001-15239
42 01580-11008 Nut 2 15001-15239
43 21W-54-51370 Sheet 1 15001-15239
44 01010-81240 Bolt 3 15001-15239
45 175-54-34170 Washer 3 15001-15239
46 22P-54-12181 Bracket 1 15001-15239
47 01010-81240 Bolt 2 15001-15239
48 175-54-34170 Washer 2 15001-15239

Reference:M1130-002001 Page:M008001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Left Side Cover, With Dust-proof Net, Woody
FIG. Name FIG. No.
Left Side Cover, (#15001-15388) M1130-004001
Left Side Cover, (#15389-) M1130-004001A

Reference:X22-1090810 Page:M009000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002108
39 48
40 29
30 31
38 31
30
32 52
28

37
36
34 35 42 41 27 26 54 25
49 33

45

8
50
22
23 51 15 53 1
19
14
47 6
46 3
44 9 9
43 9
24
21 13
7 10
18 20 12 5 11
2
4 11

17 16

Reference:M1130-004001 Page:M009001

PC78US-8 S/N 15001-UP


Left Side Cover, (#15001-15388)
Index Code Part Number Description Qty Serial No.
1 22P-54-11511 Cover 1 15001-@
2 22P-54-12850 Cover 1 15001-@
3 22P-54-12681 Stopper, Welded 1 15001-@
4 20N-54-71440 Hinge, Welded 2 15001-@
5 22P-54-12860 Cover 1 15001-@
6 22P-54-12681 Stopper, Welded 1 15001-@
7 20N-54-71440 Hinge, Welded 2 15001-@
8 22P-54-12531 Sheet 1 15001-@
9 21W-46-41530 Seal 4 15001-@
10 22B-46-24361 Lock Assembly 1 15001-@
11 08037-02512 Grommet 2 15001-@
12 01010-81235 Bolt 3 15001-@
13 175-54-34170 Washer 3 15001-@
14 01010-81225 Bolt 1 15001-@
15 01643-31232 Washer 1 15001-@
16 01010-81235 Bolt 1 15001-@
17 01643-31232 Washer 1 15001-@
18 21W-54-51161 Cover 1 15001-@
19 22P-54-12411 Sheet 1 15001-@
20 01010-81240 Bolt 1 15001-@
21 175-54-34170 Washer 1 15001-@
22 01010-81225 Bolt 1 15001-@
23 01643-31232 Washer 1 15001-@
24 22P-54-12230 Seal 1 15001-@
25 22P-54-13110 Cover 1 15001-@
26 22B-46-24180 Spring 1 15001-@
27 01023-10512 Screw 2 15001-@
28 20Y-54-29232 Bar 1 15001-@
29 22P-54-11141 Hinge 1 15001-@
30 01010-81225 Bolt 4 15001-@
Reference:M1130-004001 Page:M009001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Left Side Cover, (#15001-15388)
Index Code Part Number Description Qty Serial No.
31 01643-31232 Washer 4 15001-@
32 22P-54-11881 Bracket 1 15001-@
33 22P-54-11171 Cover 1 15001-@
34 01010-81225 Bolt 2 15001-@
35 01643-31232 Washer 2 15001-@
36 22B-46-24361 Lock Assembly 1 15001-@
37 21W-54-51580 Catcher 1 15001-@
38 22P-54-12810 Bracket 1 15001-@
39 01010-81225 Bolt 2 15001-@
40 01643-31232 Washer 2 15001-@
41 20Y-54-11611 Stopper 2 15001-@
42 01580-11008 Nut 2 15001-@
43 01010-81240 Bolt 3 15001-@
44 175-54-34170 Washer 3 15001-@
45 22P-54-12181 Bracket 1 15001-@
46 01010-81240 Bolt 2 15001-@
47 175-54-34170 Washer 2 15001-@
48 21W-54-51460 Sheet 1 15001-@
49 21W-54-51480 Sheet 1 15001-@
50 21W-54-51490 Sheet 1 15001-@
51 21W-54-51550 Sheet 1 15001-15388
52 21W-54-51560 Sheet 1 15001-@
53 21W-54-51570 Sheet 1 15001-15388
54 21W-54-51380 Seal 1 15001-@

Reference:M1130-004001 Page:M009001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA003610
39 48
40 29
30 31
38 31
30
32 51
28

37
36
34 35 42 41 27 26 54 25
49 33

53
45

8
50
22
23 15 52 1
19
14
47 6
46 3
44 9 9
43 9
24
21 13
7 10
18 20 12 5 11
2
4 11

17 16

Reference:M1130-004001A Page:M009002

PC78US-8 S/N 15001-UP


Left Side Cover, (#15389-)
Index Code Part Number Description Qty Serial No.
1 22P-54-11511 Cover 1 15001-
2 22P-54-12850 Cover 1 15001-
3 22P-54-12681 Stopper, Welded 1 15001-
4 20N-54-71440 Hinge, Welded 2 15001-
5 22P-54-12860 Cover 1 15001-
6 22P-54-12681 Stopper, Welded 1 15001-
7 20N-54-71440 Hinge, Welded 2 15001-
8 22P-54-12531 Sheet 1 15001-
9 21W-46-41530 Seal 4 15001-
10 22B-46-24361 Lock Assembly 1 15001-
11 08037-02512 Grommet 2 15001-
12 01010-81235 Bolt 3 15001-
13 175-54-34170 Washer 3 15001-
14 01010-81225 Bolt 1 15001-
15 01643-31232 Washer 1 15001-
16 01010-81235 Bolt 1 15001-
17 01643-31232 Washer 1 15001-
18 21W-54-51162 Cover 1 15444-
A2 21W-54-51161 Cover 1 15001-15443
19 22P-54-12411 Sheet 1 15001-
20 01010-81240 Bolt 1 15001-
21 175-54-34170 Washer 1 15001-
22 01010-81225 Bolt 1 15001-
23 01643-31232 Washer 1 15001-
24 22P-54-12230 Seal 1 15001-
25 22P-54-13110 Cover 1 15001-
26 22B-46-24180 Spring 1 15001-
27 01023-10512 Screw 2 15001-
28 20Y-54-29232 Bar 1 15001-
29 22P-54-11141 Hinge 1 15001-
Reference:M1130-004001A Page:M009002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Left Side Cover, (#15389-)
Index Code Part Number Description Qty Serial No.
30 01010-81225 Bolt 4 15001-
31 01643-31232 Washer 4 15001-
32 22P-54-11881 Bracket 1 15001-
33 22P-54-11171 Cover 1 15001-
34 01010-81225 Bolt 2 15001-
35 01643-31232 Washer 2 15001-
36 22B-46-24361 Lock Assembly 1 15001-
37 21W-54-51580 Catcher 1 15001-
38 22P-54-12810 Bracket 1 15001-
39 01010-81225 Bolt 2 15001-
40 01643-31232 Washer 2 15001-
41 20Y-54-11611 Stopper 2 15001-
42 01580-11008 Nut 2 15001-
43 01010-81240 Bolt 3 15001-
44 175-54-34170 Washer 3 15001-
45 22P-54-12181 Bracket 1 15001-
46 01010-81245 Bolt 2 15691-
01010-81240 Bolt 2 15001-15690
47 175-54-34170 Washer 2 15001-
48 21W-54-51460 Sheet 1 15001-
49 21W-54-51480 Sheet 1 15001-
50 21W-54-51490 Sheet 1 15001-
51 21W-54-51560 Sheet 1 15001-
52 21W-54-51570 Sheet 1 15001-
53 21W-54-51570 Sheet 1 15001-
54 21W-54-51380 Seal 1 15001-

Reference:M1130-004001A Page:M009002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Left Side Cover, With Dust-proof Net, Woody, Battery Disconnect Switch
FIG. Name FIG. No.
Left Side Cover, (#15001-15443) M1130-005001
Left Side Cover, (#15444-) M1130-005001A

Reference:X22-1090840 Page:M010000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002109
40 50
41 30
31 32
39 32
31
33 54

44 29

38
37
35 36 43 42 28 27 56 26
51 34

47

8
52
23
24 53 15 55 1
20
14
49 6
48 3
46 9 9
45 9 18
25
22 13
7 10
19 21 12 5 11
2
4 11

17 16

Reference:M1130-005001 Page:M010001

PC78US-8 S/N 15001-UP


Left Side Cover, (#15001-15443)
Index Code Part Number Description Qty Serial No.
1 22P-54-11511 Cover 1 15001-@
2 22P-54-12850 Cover 1 15001-@
3 22P-54-12681 Stopper, Welded 1 15001-@
4 20N-54-71440 Hinge, Welded 2 15001-@
5 22P-54-12860 Cover 1 15001-@
6 22P-54-12681 Stopper, Welded 1 15001-@
7 20N-54-71440 Hinge, Welded 2 15001-@
8 22P-54-12531 Sheet 1 15001-@
9 21W-46-41530 Seal 4 15001-@
10 22B-46-24361 Lock Assembly 1 15001-@
11 08037-02512 Grommet 2 15001-@
12 01010-81235 Bolt 3 15001-@
13 175-54-34170 Washer 3 15001-@
14 01010-81225 Bolt 1 15001-@
15 01643-31232 Washer 1 15001-@
16 01010-81235 Bolt 1 15001-@
17 01643-31232 Washer 1 15001-@
18 21W-46-41530 Seal 1 15001-@
19 A2 21W-54-51161 Cover 1 15001-15443
20 22P-54-12411 Sheet 1 15001-@
21 01010-81240 Bolt 1 15001-@
22 175-54-34170 Washer 1 15001-@
23 01010-81225 Bolt 1 15001-@
24 01643-31232 Washer 1 15001-@
25 22P-54-12230 Seal 1 15001-@
26 22P-54-13110 Cover 1 15001-@
27 22B-46-24180 Spring 1 15001-@
28 01023-10512 Screw 2 15001-@
29 20Y-54-29232 Bar 1 15001-@
30 22P-54-11141 Hinge 1 15001-@
Reference:M1130-005001 Page:M010001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Left Side Cover, (#15001-15443)
Index Code Part Number Description Qty Serial No.
31 01010-81225 Bolt 4 15001-@
32 01643-31232 Washer 4 15001-@
33 22P-54-11881 Bracket 1 15001-@
34 22P-54-11171 Cover 1 15001-@
35 01010-81225 Bolt 2 15001-@
36 01643-31232 Washer 2 15001-@
37 22B-46-24361 Lock Assembly 1 15001-@
38 21W-54-51580 Catcher 1 15001-@
39 22P-54-12810 Bracket 1 15001-@
40 01010-81225 Bolt 2 15001-@
41 01643-31232 Washer 2 15001-@
42 20Y-54-11611 Stopper 2 15001-@
43 01580-11008 Nut 2 15001-@
44 21W-54-51370 Sheet 1 15001-@
45 01010-81240 Bolt 3 15001-@
46 175-54-34170 Washer 3 15001-@
47 22P-54-12181 Bracket 1 15001-@
48 01010-81240 Bolt 2 15001-@
49 175-54-34170 Washer 2 15001-@
50 21W-54-51460 Sheet 1 15001-@
51 21W-54-51480 Sheet 1 15001-@
52 21W-54-51490 Sheet 1 15001-@
53 21W-54-51550 Sheet 1 15001-15388
54 21W-54-51560 Sheet 1 15001-@
55 21W-54-51570 Sheet 1 15001-15388
56 21W-54-51380 Seal 1 15001-@

Reference:M1130-005001 Page:M010001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA003611
40 50
41 30
31 32
39 32
31
33 53

44 29

38
37
35 36 43 42 28 27 56 26
51 34

47

8
52
23
24 55 15 54 1
20
14
49 6
48 3
46 9 9
45 9 18
25
22 13
7 10
19 21 12 5 11
2
4 11

17 16

Reference:M1130-005001A Page:M010002

PC78US-8 S/N 15001-UP


Left Side Cover, (#15444-)
Index Code Part Number Description Qty Serial No.
1 22P-54-11511 Cover 1 15001-
2 22P-54-12850 Cover 1 15001-
3 22P-54-12681 Stopper, Welded 1 15001-
4 20N-54-71440 Hinge, Welded 2 15001-
5 22P-54-12860 Cover 1 15001-
6 22P-54-12681 Stopper, Welded 1 15001-
7 20N-54-71440 Hinge, Welded 2 15001-
8 22P-54-12531 Sheet 1 15001-
9 21W-46-41530 Seal 4 15001-
10 22B-46-24361 Lock Assembly 1 15001-
11 08037-02512 Grommet 2 15001-
12 01010-81235 Bolt 3 15001-
13 175-54-34170 Washer 3 15001-
14 01010-81225 Bolt 1 15001-
15 01643-31232 Washer 1 15001-
16 01010-81235 Bolt 1 15001-
17 01643-31232 Washer 1 15001-
18 21W-46-41530 Seal 1 15001-
19 21W-54-51162 Cover 1 15444-
A2 21W-54-51161 Cover 1 15001-15443
20 22P-54-12411 Sheet 1 15001-
21 01010-81240 Bolt 1 15001-
22 175-54-34170 Washer 1 15001-
23 01010-81225 Bolt 1 15001-
24 01643-31232 Washer 1 15001-
25 22P-54-12230 Seal 1 15001-
26 22P-54-13110 Cover 1 15001-
27 22B-46-24180 Spring 1 15001-
28 01023-10512 Screw 2 15001-
29 20Y-54-29232 Bar 1 15001-
Reference:M1130-005001A Page:M010002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Left Side Cover, (#15444-)
Index Code Part Number Description Qty Serial No.
30 22P-54-11141 Hinge 1 15001-
31 01010-81225 Bolt 4 15001-
32 01643-31232 Washer 4 15001-
33 22P-54-11881 Bracket 1 15001-
34 22P-54-11171 Cover 1 15001-
35 01010-81225 Bolt 2 15001-
36 01643-31232 Washer 2 15001-
37 22B-46-24361 Lock Assembly 1 15001-
38 21W-54-51580 Catcher 1 15001-
39 22P-54-12810 Bracket 1 15001-
40 01010-81225 Bolt 2 15001-
41 01643-31232 Washer 2 15001-
42 20Y-54-11611 Stopper 2 15001-
43 01580-11008 Nut 2 15001-
44 21W-54-51370 Sheet 1 15001-
45 01010-81240 Bolt 3 15001-
46 175-54-34170 Washer 3 15001-
47 22P-54-12181 Bracket 1 15001-
48 01010-81245 Bolt 2 15691-
01010-81240 Bolt 2 15001-15690
49 175-54-34170 Washer 2 15001-
50 21W-54-51460 Sheet 1 15001-
51 21W-54-51480 Sheet 1 15001-
52 21W-54-51490 Sheet 1 15001-
53 21W-54-51560 Sheet 1 15001-
54 21W-54-51570 Sheet 1 15001-
55 21W-54-51570 Sheet 1 15001-
56 21W-54-51380 Seal 1 15001-

Reference:M1130-005001A Page:M010002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Right Side Cover
FIG. Name FIG. No.
Right Side Cover M1140-001001

Reference:X22-1038990 Page:M011000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001438
13

17
16

23 11

24 7 9
15 8

14
12
10 2
3 23
4
12 24
1
5
19 18
20

6
22
21

26

25

Reference:M1140-001001 Page:M011001

PC78US-8 S/N 15001-UP


Right Side Cover (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-54-51611 Cover, R.H. 1 15001-
2 22P-54-12920 Cover, Welded 1 15001-
3 22P-54-12681 Stopper, Welded 1 15001-
4 20N-54-71440 Hinge, Welded 2 15001-
5 22P-54-11941 Seal 1 15001-
6 22P-54-12940 Seal 1 15001-
7 22P-54-12820 Lock Assembly 1 15001-
8 01010-81020 Bolt 2 15001-
9 01643-31032 Washer 2 15001-
10 21W-46-41660 Grommet 1 15001-
11 08037-02512 Grommet 1 15001-
12 21W-46-41530 Seal 2 15001-
13 22P-54-12541 Rod 1 15001-
14 01643-31032 Washer 1 15001-
15 04050-12022 Pin, Cotter 1 15001-
16 20R-54-11460 Spring 1 15001-
17 01023-10508 Screw 2 15001-
18 22P-54-11681 Sheet 1 15001-
19 22P-54-12661 Sheet 1 15001-
20 22P-54-12691 Sheet 1 15001-
21 01010-81235 Bolt 1 15001-
22 175-54-34170 Washer 1 15001-
23 01010-81225 Bolt 2 15001-
24 175-54-34170 Washer 2 15001-
25 01010-81250 Bolt 4 15001-
26 175-54-34170 Washer 4 15001-

Reference:M1140-001001 Page:M011001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Machine Cab Partition, Without Rearview Camera
FIG. Name FIG. No.
Machine Cab Partition M1150-001001

Reference:X22-1036031 Page:M012000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000495
5
20
21 4
6 2
11
8

19 2
9
3

16 7
15 1

12
14 13

18
17

10

23

22

Reference:M1150-001001 Page:M012001

PC78US-8 S/N 15001-UP


Machine Cab Partition (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-54-51811 Cover 1 15896-
21W-54-51810 Cover 1 15001-15895
2 124-A62-1920 Cap 8 15001-
3 22P-54-12311 Sheet 1 15001-
4 22P-54-12321 Sheet 1 15001-
5 22P-54-12331 Sheet 1 15001-
6 22P-54-12351 Sheet 1 15001-
7 22P-54-12371 Sheet 1 15001-
8 22P-54-12711 Sheet 1 15001-
9 22P-54-12721 Sheet 1 15001-
10 22P-54-12751 Sheet 1 15001-
11 120-06-24110 Grommet 1 15001-
12 01010-81230 Bolt 4 15001-
13 01643-31232 Washer 4 15001-
14 22P-54-12580 Plate 1 15001-
15 22P-54-12590 Sheet 1 15001-
16 124-A62-1920 Cap 3 15001-
17 01010-81020 Bolt 3 15001-
18 01643-31032 Washer 3 15001-
19 21W-54-51891 Frame 1 15896-
21W-54-51890 Frame 1 15001-15895
20 01010-81235 Bolt 3 15001-
21 01643-31232 Washer 3 15001-
22 01010-81245 Bolt 3 15001-
23 175-54-34170 Washer 3 15001-

Reference:M1150-001001 Page:M012001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Machine Cab Partition, With Water Separator and Additional Fuel Filter
FIG. Name FIG. No.
Machine Cab Partition, (#15506-16832) M1150-004001
Machine Cab Partition, (#16833-) M1150-004001A

Reference:X22-1099620 Page:M013000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA003881
5
20
21 4
6 2
11
8

19 2
9
3

16 7
15 1

12
14 13

18
17

10

23

22

Reference:M1150-004001 Page:M013001

PC78US-8 S/N 15001-UP


Machine Cab Partition, (#15506-16832)
Index Code Part Number Description Qty Serial No.
1 21W-54-51811 Cover 1 15896-@
21W-54-51810 Cover 1 15506-15895
2 124-A62-1920 Cap 8 15506-@
3 22P-54-12311 Sheet 1 15506-@
4 22P-54-12321 Sheet 1 15506-@
5 22P-54-12331 Sheet 1 15506-@
6 22P-54-12351 Sheet 1 15506-@
7 22P-54-12371 Sheet 1 15506-@
8 22P-54-12711 Sheet 1 15506-@
9 22P-54-12721 Sheet 1 15506-@
10 22P-54-12751 Sheet 1 15506-@
11 120-06-24110 Grommet 1 15506-@
12 01010-81230 Bolt 4 15506-@
13 01643-31232 Washer 4 15506-@
14 22P-54-12580 Plate 1 15506-@
15 22P-54-12590 Sheet 1 15506-@
16 124-A62-1920 Cap 3 15506-@
17 01010-81020 Bolt 3 15506-@
18 01643-31032 Washer 3 15506-@
19 21W-54-51992 Frame 1 15896-16832
21W-54-51991 Frame 1 15506-15895
20 01010-81235 Bolt 3 15506-@
21 01643-31232 Washer 3 15506-@
22 01010-81245 Bolt 3 15506-@
23 175-54-34170 Washer 3 15506-@

Reference:M1150-004001 Page:M013001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA007623
5
20
21 4
6 2
11
8

19 2
9
3

16 7
15 1

12
14 13

18
17

10

23

22

Reference:M1150-004001A Page:M013002

PC78US-8 S/N 15001-UP


Machine Cab Partition, (#16833-)
Index Code Part Number Description Qty Serial No.
1 21W-54-51811 Cover 1 15896-
2 124-A62-1920 Cap 8 15506-
3 22P-54-12311 Sheet 1 15506-
4 22P-54-12321 Sheet 1 15506-
5 22P-54-12331 Sheet 1 15506-
6 22P-54-12351 Sheet 1 15506-
7 22P-54-12371 Sheet 1 15506-
8 22P-54-12711 Sheet 1 15506-
9 22P-54-12721 Sheet 1 15506-
10 22P-54-12751 Sheet 1 15506-
11 120-06-24110 Grommet 1 15506-
12 01010-81230 Bolt 4 15506-
13 01643-31232 Washer 4 15506-
14 22P-54-12580 Plate 1 15506-
15 22P-54-12590 Sheet 1 15506-
16 124-A62-1920 Cap 3 15506-
17 01010-81020 Bolt 3 15506-
18 01643-31032 Washer 3 15506-
19 21W-54-51994 Frame 1 16833-
20 01010-81235 Bolt 3 15506-
21 01643-31232 Washer 3 15506-
22 01010-81245 Bolt 3 15506-
23 175-54-34170 Washer 3 15506-

Reference:M1150-004001A Page:M013002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Battery Case
FIG. Name FIG. No.
Battery Case M1220-001001

Reference:X22-1039010 Page:M014000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000503
1

3
2

Reference:M1220-001001 Page:M014001

PC78US-8 S/N 15001-UP


Battery Case (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-54-51630 Cover 1 15001-
2 22P-54-12910 Sheet 1 15001-
3 120-06-24110 Grommet 1 15001-
4 01010-81240 Bolt 3 15001-
5 175-54-34170 Washer 3 15001-

Reference:M1220-001001 Page:M014001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Front Cover, For Machine Without Additional Actuator Piping
FIG. Name FIG. No.
Front Cover, Hydraulic Tank Cover M1230-001001
Front Cover, Step and Handrail M1230-001002

Reference:X22-1039020 Page:M015000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001427

1
14
15

12
4 13
3
11
2
18
19
17

35
36

35
5 36
9 16
7 10 34
8
6
23

31
30

29 25

21
27 20
26
28

24 22

32 33

Reference:M1230-001001 Page:M015001

PC78US-8 S/N 15001-UP


Front Cover, Hydraulic Tank Cover (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-54-11411 Cover Assembly 1 15001-
2 22P-54-12671 Hinge 1 15001-
3 01010-81020 Bolt 4 15001-
4 01643-31032 Washer 4 15001-
5 22P-54-11932 Bracket 1 15870-
22P-54-11931 Bracket 1 15001-15869
6 01010-81020 Bolt 2 15001-
7 01643-31032 Washer 2 15001-
8 20Y-54-11611 Stopper 1 15001-
9 01580-11008 Nut 1 15001-
10 124-911-5770 Plate 1 15001-
11 22P-54-12141 Bracket 1 15001-
12 01010-81030 Bolt 3 15001-
13 01643-31032 Washer 3 15001-
14 01010-81240 Bolt 2 15001-
15 01643-31232 Washer 2 15001-
16 21W-54-51111 Cover 1 15001-
17 21W-54-51120 Seal 1 15001-
18 01010-81225 Bolt 2 15001-
19 01643-31232 Washer 2 15001-
20 01010-81295 Bolt 1 15001-
21 01643-31232 Washer 1 15001-
21W-54-51201 Cover Assembly 1 15001-
22 C1 Cover 1 15001-
23 21W-54-51130 Seal 1 15001-
24 21W-54-47431 Seal 1 15001-
25 21W-54-51340 Seal 1 15001-
26 01010-81225 Bolt 2 15001-
27 01643-31232 Washer 2 15001-
21W-54-51301 Cover Assembly 1 15001-
Reference:M1230-001001 Page:M015001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Front Cover, Hydraulic Tank Cover (#15001-)
Index Code Part Number Description Qty Serial No.
28 C1 Cover 1 15001-
29 21W-54-51141 Seal 1 15001-
30 01010-81250 Bolt 1 15001-
31 01643-31232 Washer 1 15001-
32 01010-81225 Bolt 1 15001-
33 01643-31232 Washer 1 15001-
34 21W-54-51321 Plate 1 15001-
35 01010-81235 Bolt 4 15001-
36 01643-31232 Washer 4 15001-

Reference:M1230-001001 Page:M015001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001428
3
2

4
3

2
6

7 8
5
9

11

10

Reference:M1230-001002 Page:M015002

PC78US-8 S/N 15001-UP


Front Cover, Step and Handrail (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-54-51911 Cover 1 15001-
2 203-54-56970 Washer 4 15001-
3 01010-81020 Bolt 4 15001-
4 21W-54-51151 Sheet 1 15001-
5 21W-54-51171 Sheet 1 15001-
6 21W-54-41561 Cover 1 15001-
7 01010-81020 Bolt 1 15001-
8 01643-31032 Washer 1 15001-
9 21W-54-51691 Step 1 15001-
10 01010-81250 Bolt 4 15001-
11 175-54-34170 Washer 4 15001-

Reference:M1230-001002 Page:M015002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Front Cover, With 1-Additional Actuator Piping
FIG. Name FIG. No.
Front Cover, Hydraulic Tank Cover M1230-002001
Front Cover, Step and Handrail M1230-002002

Reference:X22-1039030 Page:M016000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001429

1
14
15

12
4 13
3
11
2
18
19
17

35
36

35
5 36
9
7 10 34
8
6
23 16

31
30

29 25

21
27 20
26
28

24 22

32 33

Reference:M1230-002001 Page:M016001

PC78US-8 S/N 15001-UP


Front Cover, Hydraulic Tank Cover (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-54-11411 Cover Assembly 1 15001-
2 22P-54-12671 Hinge 1 15001-
3 01010-81020 Bolt 4 15001-
4 01643-31032 Washer 4 15001-
5 22P-54-11932 Bracket 1 15870-
22P-54-11931 Bracket 1 15001-15869
6 01010-81020 Bolt 2 15001-
7 01643-31032 Washer 2 15001-
8 20Y-54-11611 Stopper 1 15001-
9 01580-11008 Nut 1 15001-
10 124-911-5770 Plate 1 15001-
11 22P-54-12141 Bracket 1 15001-
12 01010-81030 Bolt 3 15001-
13 01643-31032 Washer 3 15001-
14 01010-81240 Bolt 2 15001-
15 01643-31232 Washer 2 15001-
16 21W-54-51411 Cover 1 15001-
17 21W-54-51120 Seal 1 15001-
18 01010-81225 Bolt 2 15001-
19 01643-31232 Washer 2 15001-
20 01010-81295 Bolt 1 15001-
21 01643-31232 Washer 1 15001-
21W-54-51201 Cover Assembly 1 15001-
22 C1 Cover 1 15001-
23 21W-54-51130 Seal 1 15001-
24 21W-54-47431 Seal 1 15001-
25 21W-54-51340 Seal 1 15001-
26 01010-81225 Bolt 2 15001-
27 01643-31232 Washer 2 15001-
21W-54-51301 Cover Assembly 1 15001-
Reference:M1230-002001 Page:M016001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Front Cover, Hydraulic Tank Cover (#15001-)
Index Code Part Number Description Qty Serial No.
28 C1 Cover 1 15001-
29 21W-54-51141 Seal 1 15001-
30 01010-81250 Bolt 1 15001-
31 01643-31232 Washer 1 15001-
32 01010-81225 Bolt 1 15001-
33 01643-31232 Washer 1 15001-
34 21W-54-51321 Plate 1 15001-
35 01010-81235 Bolt 4 15001-
36 01643-31232 Washer 4 15001-

Reference:M1230-002001 Page:M016001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001428
3
2

4
3

2
6

7 8
5
9

11

10

Reference:M1230-002002 Page:M016002

PC78US-8 S/N 15001-UP


Front Cover, Step and Handrail (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-54-51911 Cover 1 15001-
2 203-54-56970 Washer 4 15001-
3 01010-81020 Bolt 4 15001-
4 21W-54-51151 Sheet 1 15001-
5 21W-54-51171 Sheet 1 15001-
6 21W-54-41561 Cover 1 15001-
7 01010-81020 Bolt 1 15001-
8 01643-31032 Washer 1 15001-
9 21W-54-51691 Step 1 15001-
10 01010-81250 Bolt 4 15001-
11 175-54-34170 Washer 4 15001-

Reference:M1230-002002 Page:M016002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Rearview Mirror L.H., L.H.
FIG. Name FIG. No.
Rearview Mirror L.H. M1410-001001

Reference:X22-1030421 Page:M017000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001409

3
2

Reference:M1410-001001 Page:M017001

PC78US-8 S/N 15001-UP


Rearview Mirror L.H. (#15001-)
Index Code Part Number Description Qty Serial No.
1 08174-13118 Mirror 1 15001-
2 21W-54-51330 Support 1 15001-
3 21W-54-47370 Clamp 1 15001-
4 01252-81025 Bolt 2 15001-

Reference:M1410-001001 Page:M017001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Rearview Mirror R.H., R.H.
FIG. Name FIG. No.
Rearview Mirror R.H. M1420-001001

Reference:X22-1030432 Page:M018000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000515
4

2
3

3
2

Reference:M1420-001001 Page:M018001

PC78US-8 S/N 15001-UP


Rearview Mirror R.H. (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-54-11122 Bracket 1 15001-
2 01010-D1020 Bolt 4 15001-
3 01643-71032 Washer 4 15001-
4 14S-54-24370 Mirror, Rearview 1 15001-

Reference:M1420-001001 Page:M018001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Counterweight, Weight 830 kg
FIG. Name FIG. No.
Counterweight M1510-001001

Reference:X22-1030441 Page:M019000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000510
8 1
3
2
3

5
6
7

10

Reference:M1510-001001 Page:M019001

PC78US-8 S/N 15001-UP


Counterweight (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-46-11412 Counterweight, 830Kg 1 15001-
2 22M-46-12130 Insert 1 15001-
3 22N-46-12120 Insert 4 15001-
4 21W-46-42410 Sheet 1 15001-
5 22P-46-11440 Sheet 1 15001-
6 22P-46-11471 Sheet 1 15001-
7 22P-46-11571 Sheet 1 15001-
8 22F-46-11240 Cap 2 15001-
9 01011-82720 Bolt 3 15001-
10 01643-32780 Washer 3 15001-

Reference:M1510-001001 Page:M019001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Counterweight, Weight, 732 kg
FIG. Name FIG. No.
Counterweight M1510-002001

Reference:X22-1039040 Page:M020000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001408
8 1
3
2
3

7 5
6

10

Reference:M1510-002001 Page:M020001

PC78US-8 S/N 15001-UP


Counterweight (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-46-51411 Counterweight, 732Kg 1 15001-
2 22M-46-12130 Insert 1 15001-
3 22N-46-12120 Insert 4 15001-
4 21W-46-42410 Sheet 1 15001-
5 22P-46-11440 Sheet 1 15001-
6 22P-46-11471 Sheet 1 15001-
7 21W-46-51420 Sheet 1 15001-
8 22F-46-11240 Cap 2 15001-
9 01011-82720 Bolt 3 15001-
10 01643-32780 Washer 3 15001-

Reference:M1510-002001 Page:M020001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Additional Counterweight, 218kg
FIG. Name FIG. No.
Additional Counterweight M1619-001001

Reference:X22-1030451 Page:M021000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000531
8
7
2
5

6
7
2
4
3

Reference:M1619-001001 Page:M021001

PC78US-8 S/N 15001-UP


Additional Counterweight (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-46-11710 Counterweight 1 15001-
2 22M-46-12130 Insert 2 15001-
3 01643-72460 Washer 2 15001-
4 22P-46-11720 Bolt 2 15001-
5 01010-81255 Bolt 1 15001-
6 01643-31232 Washer 1 15001-
7 22L-46-12150 Cap 2 15001-
8 22P-46-11430 Plate 1 15001-

Reference:M1619-001001 Page:M021001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Counterweight Cover
FIG. Name FIG. No.
Counterweight Cover M1619-002001

Reference:X22-1037500 Page:M022000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000532
1 2

Reference:M1619-002001 Page:M022001

PC78US-8 S/N 15001-UP


Counterweight Cover (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-46-11421 Plate 1 15001-
2 22F-46-11240 Cap 2 15001-
3 22L-46-12150 Cap 1 15001-

Reference:M1619-002001 Page:M022001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Under Cover
FIG. Name FIG. No.
Under Cover, (#15001-17343) M1810-001001
Under Cover, (#17344-) M1810-001001A

Reference:X22-1036021 Page:M023000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001407
11

40
41 14
16
13
15

12

42

35
30 37
38
36
39 20
32
34
31 24
33 1 22
17 23
21

6
19 5 10

4 3 9
18 8
2
7
25
27
29
26
28

Reference:M1810-001001 Page:M023001

PC78US-8 S/N 15001-UP


Under Cover, (#15001-17343)
Index Code Part Number Description Qty Serial No.
1 22P-54-11441 Cover 1 15001-@
2 01010-81225 Bolt 1 15001-@
3 175-54-34170 Washer 1 15001-@
4 01010-81225 Bolt 2 15001-@
5 01643-31232 Washer 2 15001-@
6 21W-54-51251 Cover 1 15001-@
7 01010-81225 Bolt 1 15001-@
8 175-54-34170 Washer 1 15001-@
9 01010-81225 Bolt 2 15001-@
10 01643-31232 Washer 2 15001-@
22P-54-11461 Cover 1 15001-@
11 22P-54-11471 Cover 1 15001-@
12 22P-54-12760 Grommet 1 15001-@
13 01010-81225 Bolt 3 15001-@
14 175-54-34170 Washer 3 15001-@
15 01010-81225 Bolt 2 15001-@
16 01643-31232 Washer 2 15001-@
17 22P-54-11481 Cover 1 15001-@
18 01010-81225 Bolt 3 15001-@
19 01643-31232 Washer 3 15001-@
20 22P-54-11491 Cover 1 15001-@
21 01010-81225 Bolt 1 15001-@
22 175-54-34170 Washer 1 15001-@
23 01010-81225 Bolt 2 15001-@
24 01643-31232 Washer 2 15001-@
25 22P-54-12151 Cover 1 15001-@
26 01010-81225 Bolt 2 15001-@
27 175-54-34170 Washer 2 15001-@
28 01010-81225 Bolt 2 15001-@
29 01643-31232 Washer 2 15001-@
Reference:M1810-001001 Page:M023001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Under Cover, (#15001-17343)
Index Code Part Number Description Qty Serial No.
30 21W-46-46240 Cover 1 15001-@
31 01010-81225 Bolt 1 15001-@
32 175-54-34170 Washer 1 15001-@
33 01010-81225 Bolt 1 15001-@
34 01643-31232 Washer 1 15001-@
35 22P-54-12970 Cover 1 15001-@
36 01010-81225 Bolt 2 15001-@
37 01643-31232 Washer 2 15001-@
38 203-46-56160 Cover 1 15001-@
39 203-46-61520 Gasket 1 15001-@
40 01010-81230 Bolt 2 15001-@
41 01643-31232 Washer 2 15001-@
42 22P-54-12740 Cap 1 15001-17343

Reference:M1810-001001 Page:M023001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008971
11

40
41 14
16
13
15

12

42
44
43

35
30 37
38
36
39 20
32
34
31 24
33 1 22
17 23
21

6
19 5 10

4 3 9
18 8
2
7
25
27
29
26
28

Reference:M1810-001001A Page:M023002

PC78US-8 S/N 15001-UP


Under Cover, (#17344-)
Index Code Part Number Description Qty Serial No.
1 22P-54-11441 Cover 1 15001-
2 01010-81225 Bolt 1 15001-
3 175-54-34170 Washer 1 15001-
4 01010-81225 Bolt 2 15001-
5 01643-31232 Washer 2 15001-
6 21W-54-51251 Cover 1 15001-
7 01010-81225 Bolt 1 15001-
8 175-54-34170 Washer 1 15001-
9 01010-81225 Bolt 2 15001-
10 01643-31232 Washer 2 15001-
22P-54-11461 Cover 1 15001-
11 22P-54-11471 Cover 1 15001-
12 22P-54-12760 Grommet 1 15001-
13 01010-81225 Bolt 3 15001-
14 175-54-34170 Washer 3 15001-
15 01010-81225 Bolt 2 15001-
16 01643-31232 Washer 2 15001-
17 22P-54-11481 Cover 1 15001-
18 01010-81225 Bolt 3 15001-
19 01643-31232 Washer 3 15001-
20 22P-54-11491 Cover 1 15001-
21 01010-81225 Bolt 1 15001-
22 175-54-34170 Washer 1 15001-
23 01010-81225 Bolt 2 15001-
24 01643-31232 Washer 2 15001-
25 22P-54-12151 Cover 1 15001-
26 01010-81225 Bolt 2 15001-
27 175-54-34170 Washer 2 15001-
28 01010-81225 Bolt 2 15001-
29 01643-31232 Washer 2 15001-
Reference:M1810-001001A Page:M023002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Under Cover, (#17344-)
Index Code Part Number Description Qty Serial No.
30 21W-46-46240 Cover 1 15001-
31 01010-81225 Bolt 1 15001-
32 175-54-34170 Washer 1 15001-
33 01010-81225 Bolt 1 15001-
34 01643-31232 Washer 1 15001-
35 22P-54-12970 Cover 1 15001-
36 01010-81225 Bolt 2 15001-
37 01643-31232 Washer 2 15001-
38 203-46-56160 Cover 1 15001-
39 203-46-61520 Gasket 1 15001-
40 01010-81230 Bolt 2 15001-
41 01643-31232 Washer 2 15001-
42 21W-46-51140 Cover 1 17344-
43 01010-81225 Bolt 2 17344-
44 01643-31232 Washer 2 17344-

Reference:M1810-001001A Page:M023002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
SWING CIRCLE AND ITS RELATED PARTS
Unit Name Unit No.
Swing Circle X22-0827130
Swing Machinery and Motor X22-1035951
Swing Machinery and Motor X22-1092441
Swivel Joint, Without Blade X22-1035611
Swivel Joint, With Blade X22-1035621

Reference: Page:N000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Swing Circle
FIG. Name FIG. No.
Swing Circle N1110-001001

Reference:X22-0827130 Page:N001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001406
2

7
10
6

10
8

3
9 4
3

Reference:N1110-001001 Page:N001001

PC78US-8 S/N 15001-UP


Swing Circle (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-25-42100 Circle 1 15001-
2 201-25-61150 Seal 2 15001-
3 201-25-61160 Ball 86 15001-
4 201-25-61170 Separator 86 15001-
5 201-25-61180 Plug 1 15001-
6 201-25-61190 Pin 1 15001-
7 07020-00000 Fitting, Grease 2 15001-
8 01010-81680 Bolt 25 15001-
9 01010-81680 Bolt 24 15001-
10 04020-01638 Pin, Dowel 2 15001-

Reference:N1110-001001 Page:N001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Swing Machinery and Motor
FIG. Name FIG. No.
Swing Machinery and Motor, Inner Parts (1/5) N1200-001001
Swing Machinery and Motor, Inner Parts (2/5) N1200-001002
Swing Machinery and Motor, Inner Parts (3/5) N1200-001003
Swing Machinery and Motor, Inner Parts (4/5) N1200-001004
Swing Machinery and Motor, Inner Parts (5/5) N1200-001005

Reference:X22-1035951 Page:N002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001448

35 6
36
30 31

5
8
9
11
33 4
10
29
28
34 28

27 1
29
32
21

25 17
3
23
24
22
7
20 17
14
13
26
18 2
19 16

15
12 14
18

Reference:N1200-001001 Page:N002001

PC78US-8 S/N 15001-UP


Swing Machinery and Motor, Inner Parts (1/5) (#15001-15833)
Index Code Part Number Description Qty Serial No.
21W-26-51011 Swing Machinery Assembly 1 15001-15833
1 21W-26-51120 Case 1 15001-15833
2 21W-26-41160 Shaft 1 15001-15833
3 21W-26-41240 Bearing 1 15001-15833
4 07012-00075 Seal, Oil 1 15001-15833
5 21W-26-41230 Bearing 1 15001-15833
6 21W-26-41281 Spacer 1 15001-15833
7 21W-26-41290 Seal 1 15001-15833
8 21W-26-51140 Elbow 1 15001-15833
9 07002-12434 O-ring 1 15001-15833
10 07040-11612 Plug 1 15001-15833
11 07002-11623 O-ring 1 15001-15833
12 21W-26-41180 Carrier 1 15001-15833
13 21W-26-41250 Pin 3 15001-15833
14 20S-26-71250 Pin, Spring 6 15001-15833
15 21W-26-41140 Gear 3 15001-15833
16 09232-02525 Bearing, Needle 3 15001-15833
17 201-26-71270 Washer, Thrust 12 15001-15833
18 04064-02512 Ring, Snap 6 15001-15833
19 21W-26-41270 Washer, Thrust 1 15001-15833
20 21W-26-41170 Carrier 1 15001-15833
21 201-26-71220 Shaft 3 15001-15833
22 21W-26-41120 Gear 3 15001-15833
23 424-15-12580 Bearing 3 15001-15833
24 21W-26-41260 Washer, Thrust 1 15001-15833
25 21W-26-41111 Gear 1 15001-15833
26 21W-26-41130 Gear 1 15001-15833
27 21W-26-52610 Gear, Ring 1 15001-15833
28 07049-01620 Plug 2 15001-15833
29 04020-01638 Pin, Dowel 2 15001-15833
Reference:N1200-001001 Page:N002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Swing Machinery and Motor, Inner Parts (1/5) (#15001-15833)
Index Code Part Number Description Qty Serial No.
30 07020-00000 Fitting, Grease 1 15001-15833
31 21W-26-51611 Plate 1 15001-15833
32 21W-26-51370 Hose 1 15001-15833
33 07238-10208 Connector 2 15001-15833
34 07283-32738 Clip, Pipe 1 15001-15833
35 01597-01009 Nut 2 15001-15833
36 01643-31032 Washer 2 15001-15833

Reference:N1200-001001 Page:N002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001095

7
8
6
2
9 5
10
11
12 17
14
13

40 5
4
6
3
27 8
38
7

39
15
32

33
34 37
36
35
16
41

20

26
1
31
18
29

19 30
29
21
23 25
22
28
24

Reference:N1200-001002 Page:N002002

PC78US-8 S/N 15001-UP


Swing Machinery and Motor, Inner Parts (2/5) (#15001-15833)
Index Code Part Number Description Qty Serial No.
21W-26-51011 Swing Machinery Assembly 1 15001-15833
708-7S-00280 Motor Assembly 1 15001-15833
708-7S-01270 Motor Subassembly 1 15001-15833
1 C2 (708-7S-13610) Plate, Swash 1 15001-15833
2 C2 (708-7S-21511) Housing 1 15001-15833
3 706-73-71450 Plug 1 15001-15833
4 07002-11423 O-ring 1 15001-15833
5 709-25-11650 Valve, Check 2 15001-15833
6 700-80-63230 Spring 2 15001-15833
7 708-7S-21610 Plug 2 15001-15833
8 07002-12434 O-ring 2 15001-15833
706-73-72710 Valve Subassembly 2 15001-15833
9 706-73-72720 Valve 1 15001-15833
10 706-73-72730 Poppet 1 15001-15833
11 706-73-72740 Plug 1 15001-15833
12 706-73-72440 Spring 2 15001-15833
13 708-7S-21620 Plug 2 15001-15833
14 07002-12434 O-ring 2 15001-15833
15 C2 (07000-12145) O-ring 1 15001-15833
16 C2 (720-68-19610) Pin 2 15001-15833
17 C2 (01252-61245) Bolt, Hexagon Socket Head 8 15001-15833
18 C2 (708-7S-22110) Shaft 1 15001-15833
19 C2 (708-7S-22140) Bearing 1 15001-15833
20 C2 (708-7S-22150) Bearing 1 15001-15833
21 708-7T-12230 Seal, Oil 1 15001-15833
22 708-7S-22310 Cover 1 15001-15833
23 07000-12055 O-ring 1 15001-15833
24 04065-06020 Ring, Snap 1 15001-15833
25 C2 (708-7S-23111) Cylinder Block 1 15001-15833
26 C2 (708-7S-23210) Plate 1 15001-15833
Reference:N1200-001002 Page:N002002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Swing Machinery and Motor, Inner Parts (2/5) (#15001-15833)
Index Code Part Number Description Qty Serial No.
27 C2 (720-68-19610) Pin 1 15001-15833
28 C2 (708-2L-23360) Pin 3 15001-15833
29 C2 (708-7S-13530) Spacer 2 15001-15833
30 C2 (708-7S-23510) Spring 1 15001-15833
31 C2 (04065-03212) Ring, Snap 1 15001-15833
32 C2 (708-1S-13350) Retainer, Guide 1 15001-15833
33 C2 (708-1S-13340) Retainer 1 15001-15833
34 C2 (708-7S-23310) Piston Subassembly 7 15001-15833
35 C2 (708-7S-23410) Plate 1 15001-15833
36 C2 (708-7S-25130) Plate 4 15001-15833
37 C2 (708-7S-25120) Disc 3 15001-15833
38 C2 (708-7S-25140) Piston, Brake 1 15001-15833
39 C2 (07000-12130) O-ring 1 15001-15833
40 C2 (07000-12120) O-ring 1 15001-15833
41 C2 (708-7S-25150) Spring 4 15001-15833

Reference:N1200-001002 Page:N002002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001096

1
4
3
2

Reference:N1200-001003 Page:N002003

PC78US-8 S/N 15001-UP


Swing Machinery and Motor, Inner Parts (3/5) (#15001-15833)
Index Code Part Number Description Qty Serial No.
21W-26-51011 Swing Machinery Assembly 1 15001-15833
708-7S-00280 Motor Assembly 1 15001-15833
1 702-73-04350 Valve, Relief 1 15001-15833
2 07000-12016 O-ring 1 15001-15833
3 723-60-22230 Ring, Back-up 1 15001-15833
4 07002-12434 O-ring 1 15001-15833

Reference:N1200-001003 Page:N002003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001097

5
6
4
3
2

2
3
4
6
7 8 5

Reference:N1200-001004 Page:N002004

PC78US-8 S/N 15001-UP


Swing Machinery and Motor, Inner Parts (4/5) (#15001-15833)
Index Code Part Number Description Qty Serial No.
21W-26-51011 Swing Machinery Assembly 1 15001-15833
708-7S-00280 Motor Assembly 1 15001-15833
702-15-73000 Valve Assembly 1 15001-15833
1 C1 Body 1 15001-15833
2 C1 Spool 2 15001-15833
3 C1 Seal 2 15001-15833
4 C1 Spring 2 15001-15833
5 C1 Plug 2 15001-15833
6 C1 O-ring 2 15001-15833
7 07000-03042 O-ring 1 15001-15833
8 07000-11007 O-ring 2 15001-15833
9 01252-60825 Bolt, Hexagon Socket Head 2 15001-15833

Reference:N1200-001004 Page:N002004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001451
10 25

12 23
9 3
11 24
5
4
6
19
8 17 21 20
18
22

14

1 15
13
16
2 26

27

Reference:N1200-001005 Page:N002005

PC78US-8 S/N 15001-UP


Swing Machinery and Motor, Inner Parts (5/5) (#15001-15833)
Index Code Part Number Description Qty Serial No.
21W-26-51011 Swing Machinery Assembly 1 15001-15833
1 708-8F-31610 O-ring 1 15001-15833
2 21W-26-41320 Ring 1 15001-15833
3 01011-81010 Bolt 12 15001-15833
4 01643-31032 Washer 12 15001-15833
5 708-8E-16150 Plug 1 15001-15833
6 07002-11023 O-ring 1 15001-15833
7 07049-01012 Plug 2 15001-15833
8 21W-26-51210 Filler 1 15001-15833
9 21W-26-51480 Gauge 1 15001-15833
10 02782-10423 Elbow 1 15001-15833
11 07002-12034 O-ring 1 15001-15833
12 02896-11012 O-ring 1 15001-15833
13 02783-10422 Elbow 1 15001-15833
14 124-49-51430 Joint 1 15001-15833
15 07002-12034 O-ring 2 15001-15833
16 02896-11012 O-ring 1 15001-15833
17 02783-10315 Elbow 1 15001-15833
18 07002-12034 O-ring 1 15001-15833
19 02896-11009 O-ring 1 15001-15833
20 02782-10210 Elbow 1 15001-15833
21 07002-11423 O-ring 1 15001-15833
22 02896-11008 O-ring 1 15001-15833
23 02782-10522 Elbow 1 15001-15833
24 07002-12434 O-ring 1 15001-15833
25 02896-11015 O-ring 1 15001-15833
26 01010-81645 Bolt 9 15001-15833
27 01643-31645 Washer 9 15001-15833

Reference:N1200-001005 Page:N002005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Swing Machinery and Motor
FIG. Name FIG. No.
Swing Machinery and Motor, Inner Parts (1/5) N1200-003001
Swing Machinery and Motor, Inner Parts (2/5) N1200-003002
Swing Machinery and Motor, Inner Parts (3/5) N1200-003003
Swing Machinery and Motor, Inner Parts (4/5) N1200-003004
Swing Machinery and Motor, Inner Parts (5/5) N1200-003005

Reference:X22-1092441 Page:N003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001448

35 6
36
30 31

5
8
9
11
33 4
10
29
28
34 28

27 1
29
32
21

25 17
3
23
24
22
7
20 17
14
13
26
18 2
19 16

15
12 14
18

Reference:N1200-003001 Page:N003001

PC78US-8 S/N 15001-UP


Swing Machinery and Motor, Inner Parts (1/5) (#15834-)
Index Code Part Number Description Qty Serial No.
21W-26-51020 Swing Machinery Assembly 1 15834-
1 201-26-81120 Case 1 16678-
21W-26-51120 Case 1 15834-16677
2 21W-26-41160 Shaft 1 15834-
3 21W-26-41240 Bearing 1 15834-
4 07012-00075 Seal, Oil 1 15834-
5 21W-26-41230 Bearing 1 15834-
6 21W-26-41281 Spacer 1 15834-
7 21W-26-41290 Seal 1 15834-
8 21W-26-51140 Elbow 1 15834-
9 07002-12434 O-ring 1 15834-
10 07040-11612 Plug 1 15834-
11 07002-11623 O-ring 1 15834-
12 21W-26-41180 Carrier 1 15834-
13 21W-26-41250 Pin 3 15834-
14 20S-26-71250 Pin, Spring 6 15834-
15 21W-26-41140 Gear 3 15834-
16 09232-02525 Bearing, Needle 3 15834-
17 201-26-71270 Washer, Thrust 12 15834-
18 04064-02512 Ring, Snap 6 15834-
19 21W-26-41270 Washer, Thrust 1 15834-
20 21W-26-41170 Carrier 1 15834-
21 201-26-71220 Shaft 3 15834-
22 21W-26-41120 Gear 3 15834-
23 424-15-12580 Bearing 3 15834-
24 21W-26-41260 Washer, Thrust 1 15834-
25 21W-26-41111 Gear 1 15834-
26 21W-26-41130 Gear 1 15834-
27 21W-26-52610 Gear, Ring 1 15834-
28 07049-01620 Plug 2 15834-
Reference:N1200-003001 Page:N003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Swing Machinery and Motor, Inner Parts (1/5) (#15834-)
Index Code Part Number Description Qty Serial No.
29 04020-01638 Pin, Dowel 2 15834-
30 07020-00000 Fitting, Grease 1 15834-
31 21W-26-51611 Plate 1 15834-
32 21W-26-51370 Hose 1 15834-
33 07238-10208 Connector 2 15834-
34 07283-32738 Clip, Pipe 1 15834-
35 01597-01009 Nut 2 15834-
36 01643-31032 Washer 2 15834-

Reference:N1200-003001 Page:N003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001095

7
8
6
2
9 5
10
11
12 17
14
13

40 5
4
6
3
27 8
38
7

39
15
32

33
34 37
36
35
16
41

20

26
1
31
18
29

19 30
29
21
23 25
22
28
24

Reference:N1200-003002 Page:N003002

PC78US-8 S/N 15001-UP


Swing Machinery and Motor, Inner Parts (2/5) (#15834-)
Index Code Part Number Description Qty Serial No.
21W-26-51020 Swing Machinery Assembly 1 15834-
708-7S-00290 Motor Assembly 1 15834-
708-7S-01270 Motor Subassembly 1 15834-
1 C2 (708-7S-13610) Plate, Swash 1 15834-
2 C2 (708-7S-21511) Housing 1 15834-
3 706-73-71450 Plug 1 15834-
4 07002-61423 O-ring 1 15834-
5 C2 (709-25-11650) Valve, Check 2 15834-
6 C2 (700-80-63230) Spring 2 15834-
7 C2 (708-7S-21610) Plug 2 15834-
8 C2 (07002-62434) O-ring 2 15834-
C2 (706-73-72710) Valve Subassembly 2 15834-
9 C1 Valve 1 15834-
10 C1 Poppet 1 15834-
11 C1 Plug 1 15834-
12 C2 (706-73-72440) Spring 2 15834-
13 C2 (708-7S-21620) Plug 2 15834-
14 C2 (07002-62434) O-ring 2 15834-
15 C2 (07000-B2145) O-ring 1 15834-
16 C2 (720-68-19610) Pin 2 15834-
17 01252-61245 Bolt, Hexagon Socket Head 8 15834-
18 C2 (708-7S-22110) Shaft 1 15834-
19 C2 (708-7S-22140) Bearing 1 15834-
20 C2 (708-7S-22150) Bearing 1 15834-
21 708-7T-12330 Seal, Oil 1 15834-
22 708-7S-22310 Cover 1 15834-
23 07000-B2055 O-ring 1 15834-
24 04065-06020 Ring, Snap 1 15834-
25 C2 (708-7S-23111) Cylinder Block 1 15834-
26 C2 (708-7S-23210) Plate 1 15834-
Reference:N1200-003002 Page:N003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Swing Machinery and Motor, Inner Parts (2/5) (#15834-)
Index Code Part Number Description Qty Serial No.
27 C2 (720-68-19610) Pin 1 15834-
28 C2 (708-2L-23360) Pin 3 15834-
29 C2 (708-7S-13530) Spacer 2 15834-
30 C2 (708-7S-23510) Spring 1 15834-
31 C2 (04065-03212) Ring, Snap 1 15834-
32 C2 (708-1S-13350) Retainer, Guide 1 15834-
33 C2 (708-1S-13340) Retainer 1 15834-
34 C2 (708-7S-23310) Piston Subassembly 7 15834-
35 C2 (708-7S-23410) Plate 1 15834-
36 C2 (708-7S-25130) Plate 4 15834-
37 C2 (708-7S-25120) Disc 3 15834-
38 C2 (708-7S-25140) Piston, Brake 1 15834-
39 C2 (07000-B2130) O-ring 1 15834-
40 C2 (07000-B2120) O-ring 1 15834-
41 C2 (708-7S-25150) Spring 4 15834-

Reference:N1200-003002 Page:N003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001096

1
4
3
2

Reference:N1200-003003 Page:N003003

PC78US-8 S/N 15001-UP


Swing Machinery and Motor, Inner Parts (3/5) (#15834-)
Index Code Part Number Description Qty Serial No.
21W-26-51020 Swing Machinery Assembly 1 15834-
708-7S-00290 Motor Assembly 1 15834-
1 702-73-04390 Valve, Relief 1 15834-
2 07000-12016 O-ring 1 15834-
3 723-60-22230 Ring, Back-up 1 15834-
4 07002-12434 O-ring 1 15834-

Reference:N1200-003003 Page:N003003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001097

5
6
4
3
2

2
3
4
6
7 8 5

Reference:N1200-003004 Page:N003004

PC78US-8 S/N 15001-UP


Swing Machinery and Motor, Inner Parts (4/5) (#15834-)
Index Code Part Number Description Qty Serial No.
21W-26-51020 Swing Machinery Assembly 1 15834-
708-7S-00290 Motor Assembly 1 15834-
702-15-73000 Valve Assembly 1 15834-
1 C1 Body 1 15834-
2 C1 Spool 2 15834-
3 C1 Seal 2 15834-
4 702-15-71130 Spring 2 15834-
5 702-15-71140 Plug 2 15834-
6 07002-01423 O-ring 2 15834-
7 07000-13042 O-ring 1 15834-
8 07000-B1007 O-ring 2 15834-
9 01252-60825 Bolt, Hexagon Socket Head 2 15834-

Reference:N1200-003004 Page:N003004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001451
10 25

12 23
9 3
11 24
5
4
6
19
8 17 21 20
18
22

14

1 15
13
16
2 26

27

Reference:N1200-003005 Page:N003005

PC78US-8 S/N 15001-UP


Swing Machinery and Motor, Inner Parts (5/5) (#15834-)
Index Code Part Number Description Qty Serial No.
21W-26-51020 Swing Machinery Assembly 1 15834-
1 708-8F-31610 O-ring 1 15834-
2 21W-26-41320 Ring 1 15834-
3 01011-81010 Bolt 12 15834-
4 01643-31032 Washer 12 15834-
5 708-8E-16150 Plug 1 15834-
6 07002-11023 O-ring 1 15834-
7 07049-01012 Plug 4 15834-
8 21W-26-51210 Filler 1 15834-
9 21W-26-51480 Gauge 1 15834-
10 02782-10423 Elbow 1 15834-
11 07002-12034 O-ring 1 15834-
12 02896-11012 O-ring 1 15834-
13 02783-10422 Elbow 1 15834-
14 124-49-51430 Joint 1 15834-
15 07002-12034 O-ring 2 15834-
16 02896-11012 O-ring 1 15834-
17 02783-10315 Elbow 1 15834-
18 07002-12034 O-ring 1 15834-
19 02896-11009 O-ring 1 15834-
20 02782-10210 Elbow 1 15834-
21 07002-11423 O-ring 1 15834-
22 02896-11008 O-ring 1 15834-
23 02782-10522 Elbow 1 15834-
24 07002-12434 O-ring 1 15834-
25 02896-11015 O-ring 1 15834-
26 01010-81645 Bolt 9 15834-
27 01643-31645 Washer 9 15834-

Reference:N1200-003005 Page:N003005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Swivel Joint, Without Blade
FIG. Name FIG. No.
Swivel Joint, Inner Parts N1310-001001
Swivel Joint, Mounting N1310-001002

Reference:X22-1035611 Page:N004000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
00080382

11

9 3

10

2
8

5
7

1
4

Reference:N1310-001001 Page:N004001

PC78US-8 S/N 15001-UP


Swivel Joint, Inner Parts (#15001-)
Index Code Part Number Description Qty Serial No.
703-06-22280 Swivel Joint Assembly 1 15001-
1 703-06-91170 Rotor 1 15001-
2 07000-15060 O-ring 2 15001-
3 703-06-95122 Seal 6 15001-
4 703-06-92133 Shaft 1 15001-
5 703-08-98210 Plug 4 15001-
6 703-13-98820 Plug 2 15001-
7 703-06-94110 Ring 1 15001-
8 04064-05520 Ring, Snap 1 15001-
9 703-06-93230 Cover 1 15001-
10 07000-12075 O-ring 1 15001-
11 01435-00830 Bolt 4 15001-

Reference:N1310-001001 Page:N004001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001398
4
3
5 6
7
4
3 8
5 14

14

4 13
3
5
13
4
3
5

12
10 9
11

15

Reference:N1310-001002 Page:N004002

PC78US-8 S/N 15001-UP


Swivel Joint, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81235 Bolt 4 15001-
2 01643-31232 Washer 4 15001-
3 02781-00522 Union 4 15001-
4 02896-11015 O-ring 4 15001-
5 07002-12434 O-ring 4 15001-
6 02782-10311 Elbow 1 15001-
7 02896-61009 O-ring 1 15001-
8 07002-61423 O-ring 1 15001-
9 02782-10210 Elbow 1 15001-
10 02896-11008 O-ring 1 15001-
11 07002-11423 O-ring 1 15001-
12 21W-60-51210 Plate 1 15001-
13 01640-21626 Washer, Flat 2 15001-
14 04050-14040 Pin, Cotter 2 15001-
15 21X-60-11130 Pin 1 15001-

Reference:N1310-001002 Page:N004002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Swivel Joint, With Blade
FIG. Name FIG. No.
Swivel Joint, Inner Parts N1310-002001
Swivel Joint, Swivel Joint Mounting N1310-002002

Reference:X22-1035621 Page:N005000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY023564
11

10
6

7
2

Reference:N1310-002001 Page:N005001

PC78US-8 S/N 15001-UP


Swivel Joint, Inner Parts (#15001-)
Index Code Part Number Description Qty Serial No.
703-07-23250 Swivel Joint Assembly 1 15001-
1 703-07-91230 Rotor 1 15001-
2 07000-15070 O-ring 2 15001-
3 703-07-92183 Shaft 1 15001-
4 703-08-98210 Plug 4 15001-
5 703-13-98820 Plug 3 15001-
6 703-07-95122 Seal 8 15001-
7 703-07-94170 Ring 1 15001-
8 04064-06525 Ring, Snap, for Shaft Side 1 15001-
9 703-07-93210 Cover 1 15001-
10 07000-12085 O-ring 1 15001-
11 01435-00830 Bolt 4 15001-

Reference:N1310-002001 Page:N005001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001383
4
3
13
12 5
14

16
15
17 20

19

18
10
9
11

7 6 8
21

Reference:N1310-002002 Page:N005002

PC78US-8 S/N 15001-UP


Swivel Joint, Swivel Joint Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81235 Bolt 4 15001-
2 01643-31232 Washer 4 15001-
3 02782-10311 Elbow 1 15001-
4 02896-61009 O-ring 1 15001-
5 07002-61423 O-ring 1 15001-
6 02782-10210 Elbow 1 15001-
7 02896-11008 O-ring 1 15001-
8 07002-11423 O-ring 1 15001-
9 02781-00315 Union 1 15001-
10 02896-11009 O-ring 1 15001-
11 07002-12034 O-ring 1 15001-
12 02781-00522 Union 4 15001-
13 02896-11015 O-ring 4 15001-
14 07002-12434 O-ring 4 15001-
15 02781-00422 Union 1 15001-
16 02896-11012 O-ring 1 15001-
17 07002-12034 O-ring 1 15001-
18 21W-60-51210 Plate 1 15001-
19 01640-21626 Washer, Flat 2 15001-
20 04050-14040 Pin, Cotter 2 15001-
21 21X-60-11130 Pin 1 15001-

Reference:N1310-002002 Page:N005002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
TRAVEL SYSTEM AND ITS RELATED PARTS
Unit Name Unit No.
Travel Piping, Without Blade X22-1039050
Travel Piping, For Machine With Dozer Blade X22-1039820
Travel Motor and Final Drive X22-1030511

Reference: Page:P000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Travel Piping, Without Blade
FIG. Name FIG. No.
Travel Piping P1110-001001

Reference:X22-1039050 Page:P001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001372

13 15
24
14 24
32
30
31
8 26
10 67
25
29
10 27
9 28 13
10
1 23 22
4 5 15 14 21
5 22
11 3
12 7 16 23 13
20 29
2 8 18 27
15 14
32 28
17 13 15 30
31
19 3 3
14 10 8
7 12
6
8 11 10 10
9 26
2 24
25
12 7
2
15
5 4 5 5

Reference:P1110-001001 Page:P001001

PC78US-8 S/N 15001-UP


Travel Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 203-62-52210 Rubber 2 15001-
2 21W-62-43840 Hose 2 15001-
3 21W-62-41771 Hose 2 15001-
4 22P-62-13740 Sheet 2 15001-
5 08034-20823 Band 8 15001-
6 203-62-52210 Rubber 2 15001-
7 21W-62-43840 Hose 2 15001-
8 22P-62-12260 Hose 2 15001-
9 22P-62-13740 Sheet 2 15001-
10 08034-20823 Band 8 15001-
11 22P-30-11120 Grommet 2 15001-
12 08034-40521 Band 4 15001-
13 02782-10522 Elbow 4 15001-
14 02896-11015 O-ring 4 15001-
15 07002-12434 O-ring 4 15001-
16 20Y-62-22160 Adapter 1 15001-
17 07002-21423 O-ring 1 15001-
18 21W-62-45140 Elbow 1 15001-
19 02896-21009 O-ring 2 15001-
20 07002-21423 O-ring 1 15001-
21 21W-62-45210 Elbow 1 15001-
22 02896-11008 O-ring 2 15001-
23 07002-11423 O-ring 1 15001-
24 02781-00522 Union 4 15001-
25 02896-11015 O-ring 4 15001-
26 07002-12434 O-ring 4 15001-
27 02781-0021D Union 2 15001-
28 02896-11008 O-ring 2 15001-
29 07002-11423 O-ring 2 15001-
30 02781-00315 Union 2 15001-
Reference:P1110-001001 Page:P001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Travel Piping (#15001-)
Index Code Part Number Description Qty Serial No.
31 02896-21009 O-ring 2 15001-
32 07002-22034 O-ring 2 15001-

Reference:P1110-001001 Page:P001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Travel Piping, For Machine With Dozer Blade
FIG. Name FIG. No.
Travel Piping P1110-002001

Reference:X22-1039820 Page:P002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000528

13 15
24
14 24
32
30
31 22
8 26
67 21
10 25
29
10 13
27
9 28 22
10 14
1 23 15
4 5
23
5
15 29
11 3 15 13 27
17 28
12 13 32
8 7 16 14 30
2 34 19 31
35 20 3 3
18 14 10 8
41 19 7 12
36 6
33
11 10 10
40 9 26
2 24
38 8 25
39 12 7
2
5
5 4 5 51

37

41

Reference:P1110-002001 Page:P002001

PC78US-8 S/N 15001-UP


Travel Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 203-62-52210 Rubber 2 15001-
2 21W-62-43840 Hose 2 15001-
3 21W-62-41771 Hose 2 15001-
4 22P-62-13740 Sheet 2 15001-
5 08034-20823 Band 8 15001-
6 203-62-52210 Rubber 2 15001-
7 21W-62-43840 Hose 2 15001-
8 22P-62-12260 Hose 2 15001-
9 22P-62-13740 Sheet 2 15001-
10 08034-20823 Band 8 15001-
11 22P-30-11120 Grommet 2 15001-
12 08034-40521 Band 4 15001-
13 02782-10522 Elbow 4 15001-
14 02896-11015 O-ring 4 15001-
15 07002-12434 O-ring 4 15001-
16 20Y-62-22160 Adapter 1 15001-
17 07002-21423 O-ring 1 15001-
18 21W-62-42630 Tee 1 15001-
19 02896-21009 O-ring 2 15001-
20 07002-21423 O-ring 1 15001-
21 21W-62-45210 Elbow 1 15001-
22 02896-11008 O-ring 2 15001-
23 07002-11423 O-ring 1 15001-
24 02781-00522 Union 4 15001-
25 02896-11015 O-ring 4 15001-
26 07002-12434 O-ring 4 15001-
27 02781-0021D Union 2 15001-
28 02896-11008 O-ring 2 15001-
29 07002-11423 O-ring 2 15001-
30 02781-00315 Union 2 15001-
Reference:P1110-002001 Page:P002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Travel Piping (#15001-)
Index Code Part Number Description Qty Serial No.
31 02896-21009 O-ring 2 15001-
32 07002-22034 O-ring 2 15001-
33 21W-62-43860 Hose 1 15001-
34 02782-1031B Elbow 1 15001-
35 02896-11009 O-ring 1 15001-
36 07002-11823 O-ring 1 15001-
37 21W-62-43350 Hose 1 15001-
38 20U-62-41690 Elbow 1 15001-
39 02896-11012 O-ring 1 15001-
40 07002-11823 O-ring 1 15001-
41 08037-03620 Grommet 2 15001-

Reference:P1110-002001 Page:P002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Travel Motor and Final Drive
FIG. Name FIG. No.
Travel Motor and Final Drive, Sprocket P1210-001001
Travel Motor and Final Drive, Inner Parts, Travel Motor (1/3) P1210-001002
Travel Motor and Final Drive, Inner Parts, Travel Motor (2/3) P1210-001003
Travel Motor and Final Drive, Inner Parts, Travel Motor (3/3) P1210-001004
Travel Motor and Final Drive, Bolt P1210-001005

Reference:X22-1030511 Page:P003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000529

1 3
2

Reference:P1210-001001 Page:P003001

PC78US-8 S/N 15001-UP


Travel Motor and Final Drive, Sprocket (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-27-41110 Sprocket 2 15001-
2 201-27-61230 Bolt 28 15001-
3 01643-31445 Washer, Flat 28 15001-

Reference:P1210-001001 Page:P003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000545
32
10
8
17
19
11
15

15 9

14
1
23
22
3

27

26

30 25 20
26 22
27 24 29
28 12
6
13
16
18
21

31

Reference:P1210-001002 Page:P003002

PC78US-8 S/N 15001-UP


Travel Motor and Final Drive, Inner Parts, Travel Motor (1/3) (#15001-)
Index Code Part Number Description Qty Serial No.
22P-60-11301 Motor Assembly 2 15001-
TZ119D1000-00 Final Drive Assembly 1 15001-
TZ192-230-30BA Floating Seal Assembly, (Kit : K01) 1 15001-
1 C1 Seal 2 15001-
2 TZ115D1001-00 Hub 1 15001-
3 TZ115D1002-00 Spindle 1 15001-
4 TZ111D1003-00 Carrier 1 15001-
5 TZ111D1004-00 Gear, Sun 1 15001-
6 TZ111D1005-00 Gear, Planetary 3 15001-
7 TZ110D1006-00 Gear, Sun 1 15001-
8 TZ110D1007-00 Gear, Planetary 4 15001-
9 TZ400G1009-00 Collar 1 15001-
10 TZ110D1010-00 Washer, Thrust 4 15001-
11 TZ110D1011-00 Washer, Thrust 4 15001-
12 TZ440D1012-00 Washer, Thrust 3 15001-
13 TZ110D1013-00 Cover 1 15001-
14 TZ110D1022-00 Nut, Ring 1 15001-
15 TZ110D1024-00 Bearing 2 15001-
16 TZ110D1027-00 Bearing 3 15001-
17 TZ110D1028-00 Bearing 4 15001-
18 TZ110D1029-00 Ring 3 15001-
19 TZ110D1030-00 Ring 4 15001-
20 TZ410D1033-01 Plug 1 15001-
21 07000-05230 O-ring, (Kit : K01) 1 15001-
22 07000-12014 O-ring, (Kit : K01) 3 15001-
23 TZ810B2021-00 Plug 2 15001-
24 TZ1180082010L2 Bolt 3 15001-
25 04260-00952 Ball 1 15001-
26 TZ263B2077-01 Pin, Dowel 2 15001-
27 07000-11007 O-ring, (Kit : K01) 2 15001-
Reference:P1210-001002 Page:P003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Travel Motor and Final Drive, Inner Parts, Travel Motor (1/3) (#15001-)
Index Code Part Number Description Qty Serial No.
28 TZJW1516-G37-7 O-ring, (Kit : K01) 1 15001-
29 TZ810B1018-00 Ring 1 15001-
30 TZJB1177M812-B Screw, Hexagon Socket Head 2 15001-
31 04064-04518 Ring, Snap 1 15001-
32 TZ1180102010L Bolt 4 15001-

Reference:P1210-001002 Page:P003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000546
16

13

20

14

10

23 17

19 27
4
5
18
6

2
1

24 26
25
3
22
11
15
11
7
21

9
12

Reference:P1210-001003 Page:P003003

PC78US-8 S/N 15001-UP


Travel Motor and Final Drive, Inner Parts, Travel Motor (2/3) (#15001-)
Index Code Part Number Description Qty Serial No.
22P-60-11301 Motor Assembly 2 15001-
TZ110D200001-H Motor 1 15001-
TZ277B2205-00 Cylinder and Piston Kit 1 15001-
C1 Piston Kit 1 15001-
C1 Piston Assembly 9 15001-
1 C1 Piston 1 15001-
2 C1 Shoe 1 15001-
3 C1 Cylinder Block 1 15001-
TZ263B2070-01 Piston Assembly 1 15001-
4 C1 Piston 1 15001-
5 C1 Shoe 1 15001-
6 TZ110D2002-00 Shaft 1 15001-
7 TZ110D200300-H Swash Plate 1 15001-
8 TZ277B2007-00 Retainer Plate 1 15001-
9 TZ263B2008-01 Thrust Ball 1 15001-
10 TZ110D2009-01 Timing Plate 1 15001-
11 TZ880A2010-00 Washer 2 15001-
12 TZ263B2011-03 Washer 1 15001-
13 TZ266B2012-00 Piston 1 15001-
14 TZ500D2013-00 Spring 10 15001-
15 TZ277B2014-00 Spring 1 15001-
16 TZ800A2015-00 Plate 2 15001-
17 TZ800A2016-00 Plate 3 15001-
18 TZTCZ-30-50-9 Seal, Oil, (Kit : K01) 1 15001-
19 TZ266B2035-00 O-ring, (Kit : K01) 1 15001-
20 TZ266B2039-00 O-ring, (Kit : K01) 1 15001-
21 TZTH-R-42 Ring, Snap 1 15001-
22 06000-06206 Bearing 1 15001-
23 TZ400G2049-00 Bearing 1 15001-
24 TZ263B2098-00 Roller 3 15001-
Reference:P1210-001003 Page:P003003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Travel Motor and Final Drive, Inner Parts, Travel Motor (2/3) (#15001-)
Index Code Part Number Description Qty Serial No.
25 TZ263B2076-02 Pivot 2 15001-
26 TZ263B2077-01 Pin 2 15001-
27 TZ263B2090-00 Spring 1 15001-

Reference:P1210-001003 Page:P003003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000547
23 10 20
17 19
15 21
22
13 18
5
5 7
1

11
16 24 6

14

12 4
3 8 13
3 15
17
23
5 3
25
9 5
25 2

12

14

16

11

Reference:P1210-001004 Page:P003004

PC78US-8 S/N 15001-UP


Travel Motor and Final Drive, Inner Parts, Travel Motor (3/3) (#15001-)
Index Code Part Number Description Qty Serial No.
22P-60-11301 Motor Assembly 2 15001-
TZ111D400000-F Valve Assembly, Control 1 15001-
TZ111D410000-F Flange Assembly, Rear 1 15001-
TZ111D410100-F Flange Kit, Rear 1 15001-
1 C1 Flange, Rear 1 15001-
2 C1 Spool 1 15001-
3 TZGM1-8-S Plug, Hexagon Head 3 15001-
4 C1 Ball 1 15001-
5 TZGDL1-16-S Plug, Hexagon Head 4 15001-
6 C1 Filter 1 15001-
7 C1 Orifice 1 15001-
8 C1 Plug 1 15001-
9 C1 Plate, Name 1 15001-
10 07040-12012 Plug 1 15001-
11 TZ110D4024-00 Plug 2 15001-
12 TZ869A205200-B Retainer Spring 2 15001-
13 TZ500D4054-00 Valve 2 15001-
14 TZ116D4056-00 Spring 2 15001-
15 TZ500D4055-00 Spring 2 15001-
16 TZJB2401-P26-9 O-ring, (Kit : K01) 2 15001-
17 07000-12018 O-ring, (Kit : K01) 2 15001-
18 TZ200B2073-00 Valve 1 15001-
19 TZ300B2039-00 Stopper 1 15001-
20 TZ300B2042-00 Ring 1 15001-
21 TZ300B2043-01 Spring 1 15001-
22 07002-12034 O-ring, (Kit : K01) 1 15001-
23 TZ610B2021-00 Plug 2 15001-
24 TZJB1354-4-10 Pin 1 15001-
25 01252-31230 Bolt 8 15001-

Reference:P1210-001004 Page:P003004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000548
1
2

Reference:P1210-001005 Page:P003005

PC78US-8 S/N 15001-UP


Travel Motor and Final Drive, Bolt (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81640 Bolt 28 15001-
2 01643-31645 Washer 28 15001-

Reference:P1210-001005 Page:P003005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
UNDERCARRIAGE
Unit Name Unit No.
Front Idler X22-0604081
Idler Cushion X22-1035761
Idler Cushion, For Machine With Rubber Shoe X22-1037150
Track Roller X22-1037480
Carrier Roller X22-0436871
Track Shoe Assembly, Road Liner Shoe, 450mm Width, Grease Sealed Type, 78 Set X22-0297212
Track Shoe Assembly, Rubber Shoe, 450mm Width X22-0435870
Track Shoe Assembly, Holed Triple Grouser Shoe, 600mm Width, Grease Sealed Type, 78 Set X22-0583271
Track Shoe Assembly, Triple Grouser Shoe for City Pad, 450mm Width, Grease Sealed Type, 78 Set X22-1021451
Track Link Assembly, Supply Only, 78 Set, Grease Sealed Type X21-1380241
Track Frame, With Hook X22-1034671
Track Frame, For Machine With Dozer Blade, Strengthened X22-1036321
Track Frame, Without Blade X22-1036311
Track Frame, For Machine With Dozer Blade X22-1039060
Track Frame, Strengthened X22-1039370
Track Frame Cover X22-1037420
Track Frame Under Cover X22-0452751
Track Guard, For Machine With Rubber Shoe X22-0094480
Track Guard X22-0450701
Track Guard and Track Roller Guard, With Track Roller Guard X22-0692710

Reference: Page:R000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Front Idler
FIG. Name FIG. No.
Front Idler R0110-001001

Reference:X22-0604081 Page:R001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000550

6
4

8
7
8
2

2
9 6
1
5
9
8
7
8
3
10

Reference:R0110-001001 Page:R001001

PC78US-8 S/N 15001-UP


Front Idler (#15001-)
Index Code Part Number Description Qty Serial No.
21W-30-00014 Idler Assembly 2 15001-
1 21W-30-12513 Idler 1 15001-
2 21W-30-14540 Bushing 2 15001-
3 201-30-52131 Support, Outer 1 15001-
4 201-30-52141 Support, Inner 1 15001-
5 201-30-52160 Shaft 1 15001-
6 201-30-52180 Pin 2 15001-
141-30-00616 Floating Seal Assembly 2 15001-
7 C1 Seal 2 15001-
8 C1 O-ring 2 15001-
9 07000-13038 O-ring 2 15001-
10 07043-50108 Plug, Taper 1 15001-

Reference:R0110-001001 Page:R001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Idler Cushion
FIG. Name FIG. No.
Idler Cushion R0120-001001

Reference:X22-1035761 Page:R002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000554
11
10
9

13
12
15

19
20

8
17
18
5

7
16
3

14

Reference:R0120-001001 Page:R002001

PC78US-8 S/N 15001-UP


Idler Cushion (#15001-)
Index Code Part Number Description Qty Serial No.
21W-30-00140 Cylinder Assembly 2 15001-
1 21W-30-51222 Cylinder 1 15001-
2 201-30-75141 Collar 1 15001-
3 21W-30-32620 Nut 1 15001-
4 01643-31032 Washer 1 15001-
5 21W-30-32610 Bolt 1 15001-
6 21W-30-41170 Spring 1 15001-
7 203-30-42260 Valve 1 15001-
8 07020-00900 Fitting, Grease 1 15001-
9 07155-00515 Ring, Wear 1 15001-
10 09370-00050 U-packing 1 15001-
11 04064-03515 Ring, Snap 1 15001-
12 707-56-50540 Seal, Dust 1 15001-
13 21W-30-51211 Rod 1 15001-
14 07177-05030 Bushing 1 15001-
15 201-30-71310 Ring, Snap 1 15001-
16 21W-30-51120 Plate 1 15001-
17 01010-80830 Bolt 2 15001-
18 01643-30823 Washer 2 15001-
19 01010-81475 Bolt 8 15001-
20 01643-31445 Washer, Flat 8 15001-

Reference:R0120-001001 Page:R002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Idler Cushion, For Machine With Rubber Shoe
FIG. Name FIG. No.
Idler Cushion R0120-002001

Reference:X22-1037150 Page:R003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000554
11
10
9

13
12
15

19
20

8
17
18
5

7
16
3

14

Reference:R0120-002001 Page:R003001

PC78US-8 S/N 15001-UP


Idler Cushion (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-30-51222 Cylinder 2 15001-
2 201-30-75141 Collar 2 15001-
3 21W-30-32620 Nut 2 15001-
4 01643-31032 Washer 2 15001-
5 21W-30-32610 Bolt 2 15001-
6 21W-30-41170 Spring 2 15001-
7 203-30-42260 Valve 2 15001-
8 07020-00900 Fitting, Grease 2 15001-
9 07155-00515 Ring, Wear 2 15001-
10 09370-00050 U-packing 2 15001-
11 04064-03515 Ring, Snap 2 15001-
12 707-56-50540 Seal, Dust 2 15001-
13 21W-30-51211 Rod 2 15001-
14 07177-05030 Bushing 2 15001-
15 201-30-71310 Ring, Snap 2 15001-
16 21W-30-51120 Plate 2 15001-
17 01010-80830 Bolt 4 15001-
18 01643-30823 Washer 4 15001-
19 01010-81475 Bolt 8 15001-
20 01643-31445 Washer, Flat 8 15001-

Reference:R0120-002001 Page:R003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Roller
FIG. Name FIG. No.
Track Roller R0200-001001

Reference:X22-1037480 Page:R004000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000556
2

5
4

11

9
10
11

10

8
7

Reference:R0200-001001 Page:R004001

PC78US-8 S/N 15001-UP


Track Roller (#15001-)
Index Code Part Number Description Qty Serial No.
201-30-00313 Track Roller Assembly 10 15686-
A2 201-30-00312 Track Roller Assembly 10 15001-15685
1 201-30-73312 Roller 1 15686-
201-30-73311 Roller 1 15001-15685
2 201-30-76140 Bushing 2 15001-
3 201-30-76121 Shaft Assembly 1 15686-
201-30-76120 Shaft Assembly 1 15001-15685
4 201-30-76161 Collar, Outer 1 15686-
201-30-76160 Collar, Outer 1 15001-15685
5 201-30-73390 Pin 1 15001-
201-30-00080 Floating Seal Assembly 2 15001-
6 C1 Seal 2 15001-
7 C1 O-ring 2 15001-
8 07000-12035 O-ring 1 15001-
9 20Y-30-16330 Plug 1 15001-
10 01010-81460 Bolt 40 15001-
11 01643-31445 Washer, Flat 40 15001-

Reference:R0200-001001 Page:R004001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Carrier Roller
FIG. Name FIG. No.
Carrier Roller R0300-001001

Reference:X22-0436871 Page:R005000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000558

8
9

3
2

2
5
6

Reference:R0300-001001 Page:R005001

PC78US-8 S/N 15001-UP


Carrier Roller (#15001-)
Index Code Part Number Description Qty Serial No.
22P-30-00100 Carrier Roller Assembly 2 15001-
1 C1 Roller 1 15001-
2 06000-06206 Bearing 2 15001-
3 20T-30-73140 Seal 1 15001-
4 22P-30-12221 Shaft 1 15001-
5 04064-03015 Ring, Snap, for Shaft Side 1 15001-
6 20T-30-73150 Cap 1 15001-
7 07043-70108 Plug, Taper 1 15001-
8 01010-81685 Bolt 2 15001-
9 01643-31645 Washer 2 15001-

Reference:R0300-001001 Page:R005001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Shoe Assembly, Road Liner Shoe, 450mm Width, Grease Sealed Type, 78 Set
FIG. Name FIG. No.
Track Shoe Assembly R0500-003001

Reference:X22-0297212 Page:R006000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JH001600

17

16
12
18 11
14
9
2
19
3 4
19
1
20 19
13
19
10 12
5 20 15

3
6

Reference:R0500-003001 Page:R006001

PC78US-8 S/N 15001-UP


Track Shoe Assembly (#15001-)
Index Code Part Number Description Qty Serial No.
21W-32-02103 Track Shoe Assembly 1 15001-
1 201-32-51122 Link 38 15001-
2 201-32-51132 Link 38 15001-
3 101-32-11271 Seal, Dust 72 15001-
4 22P-32-11170 Bushing, Master 2 15001-
5 201-32-51140 Bushing, Regular 36 15001-
6 201-32-71150 Pin, Regular 36 15001-
7 21W-32-26111 Shoe 38 15001-
8 22P-32-11210 Bolt, (Kit : K02) 152 15001-
9 11Y-32-11220 Nut, (Kit : K02) 152 15001-
10 201-32-51122 Link 40 15001-
11 201-32-51132 Link 40 15001-
12 101-32-11271 Seal, Dust 76 15001-
13 22P-32-11170 Bushing, Master 2 15001-
14 201-32-51140 Bushing, Regular 38 15001-
15 201-32-71150 Pin, Regular 38 15001-
16 21W-32-26111 Shoe 40 15001-
17 22P-32-11210 Bolt, (Kit : K02) 160 15001-
18 11Y-32-11220 Nut, (Kit : K02) 160 15001-
19 101-32-11281 Seal, Dust 8 15001-
20 201-32-71190 Pin, Master 4 15001-

Reference:R0500-003001 Page:R006001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Shoe Assembly, Rubber Shoe, 450mm Width
FIG. Name FIG. No.
Track Shoe Assembly R0500-004001

Reference:X22-0435870 Page:R007000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
@@K2949@

Reference:R0500-004001 Page:R007001

PC78US-8 S/N 15001-UP


Track Shoe Assembly (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-32-25210 Shoe 2 15001-

Reference:R0500-004001 Page:R007001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Shoe Assembly, Holed Triple Grouser Shoe, 600mm Width, Grease Sealed Type, 78 Set
FIG. Name FIG. No.
Track Shoe Assembly R0500-005001

Reference:X22-0583271 Page:R008000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JH001602

17
16

12
11
9 14
2 18
19 10
12
4
15
19 19
1
20 13
3
19
20
5
3
6

7
8

Reference:R0500-005001 Page:R008001

PC78US-8 S/N 15001-UP


Track Shoe Assembly (#15001-)
Index Code Part Number Description Qty Serial No.
21W-32-01212 Track Shoe Assembly 1 15001-
1 201-32-51122 Link 38 15001-
2 201-32-51132 Link 38 15001-
3 101-32-11271 Seal, Dust 72 15001-
4 22P-32-11170 Bushing, Master 2 15001-
5 201-32-51140 Bushing, Regular 36 15001-
6 201-32-71150 Pin, Regular 36 15001-
7 201-32-71310 Shoe 38 15001-
8 201-32-51240 Bolt, (Kit : K08) 152 15358-
A2 201-32-51211 Bolt, (Kit : K03) 152 15001-15357
9 11Y-32-11220 Nut, (Kit : K03, K08) 152 15001-
10 201-32-51122 Link 40 15001-
11 201-32-51132 Link 40 15001-
12 101-32-11271 Seal, Dust 76 15001-
13 22P-32-11170 Bushing, Master 2 15001-
14 201-32-51140 Bushing, Regular 38 15001-
15 201-32-71150 Pin, Regular 38 15001-
16 201-32-71310 Shoe 40 15001-
17 201-32-51240 Bolt, (Kit : K08) 160 15358-
A2 201-32-51211 Bolt, (Kit : K03) 160 15001-15357
18 11Y-32-11220 Nut, (Kit : K03, K08) 160 15001-
19 101-32-11281 Seal, Dust 8 15001-
20 201-32-71190 Pin, Master 4 15001-

Reference:R0500-005001 Page:R008001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Shoe Assembly, Triple Grouser Shoe for City Pad, 450mm Width, Grease Sealed Type, 78 Set
FIG. Name FIG. No.
Track Shoe Assembly R0500-006001

Reference:X22-1021451 Page:R009000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JH001601

17
16

12
11
9 14
2 18
19 10
12
4
15
19 19
1
20 13
3
19
20
5
3
6

7
8

Reference:R0500-006001 Page:R009001

PC78US-8 S/N 15001-UP


Track Shoe Assembly (#15001-)
Index Code Part Number Description Qty Serial No.
21W-32-02402 Track Shoe Assembly 1 15001-
1 201-32-51122 Link 38 15001-
2 201-32-51132 Link 38 15001-
3 101-32-11271 Seal, Dust 72 15001-
4 22P-32-11170 Bushing, Master 2 15001-
5 201-32-51140 Bushing, Regular 36 15001-
6 201-32-71150 Pin, Regular 36 15001-
7 201-32-71420 Shoe 38 15001-
8 201-32-51240 Bolt, (Kit : K08) 152 15358-
A2 201-32-51211 Bolt, (Kit : K03) 152 15001-15357
9 11Y-32-11220 Nut, (Kit : K03, K08) 152 15001-
10 201-32-51122 Link 40 15001-
11 201-32-51132 Link 40 15001-
12 101-32-11271 Seal, Dust 76 15001-
13 22P-32-11170 Bushing, Master 2 15001-
14 201-32-51140 Bushing, Regular 38 15001-
15 201-32-71150 Pin, Regular 38 15001-
16 201-32-71420 Shoe 40 15001-
17 201-32-51240 Bolt, (Kit : K08) 160 15358-
A2 201-32-51211 Bolt, (Kit : K03) 160 15001-15357
18 11Y-32-11220 Nut, (Kit : K03, K08) 160 15001-
19 101-32-11281 Seal, Dust 8 15001-
20 201-32-71190 Pin, Master 4 15001-

Reference:R0500-006001 Page:R009001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Link Assembly, Supply Only, 78 Set, Grease Sealed Type
FIG. Name FIG. No.
Track Link Assembly R0501-001001

Reference:X21-1380241 Page:R010000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JH024386
9

8
11
7
9
12

13
10
13

14
3 2
13
4
13
1
14

3
6

Reference:R0501-001001 Page:R010001

PC78US-8 S/N 15001-UP


Track Link Assembly (#15001-)
Index Code Part Number Description Qty Serial No.
21W-32-00014 Track Link Assembly 1 15001-
1 201-32-51122 Link 38 15001-
2 201-32-51132 Link 38 15001-
3 101-32-11271 Seal, Dust 72 15001-
4 22P-32-11170 Bushing, Master 2 15001-
5 201-32-51140 Bushing, Regular 36 15001-
6 201-32-71150 Pin, Regular 36 15001-
7 201-32-51122 Link 40 15001-
8 201-32-51132 Link 40 15001-
9 101-32-11271 Seal, Dust 76 15001-
10 22P-32-11170 Bushing, Master 2 15001-
11 201-32-51140 Bushing, Regular 38 15001-
12 201-32-71150 Pin, Regular 38 15001-
13 101-32-11281 Seal, Dust 8 15001-
14 201-32-71190 Pin, Master 4 15001-

Reference:R0501-001001 Page:R010001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Frame, With Hook
FIG. Name FIG. No.
Track Frame R1100-001001

Reference:X22-1034671 Page:R011000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000560
1

2
3

Reference:R1100-001001 Page:R011001

PC78US-8 S/N 15001-UP


Track Frame (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-30-14110 Track Frame 1 15001-
2 21W-30-41E81 Plate, Welded 2 15001-
3 01580-11613 Nut, Welded 2 15001-
4 07049-01418 Plug 8 15001-

Reference:R1100-001001 Page:R011001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Frame, For Machine With Dozer Blade, Strengthened
FIG. Name FIG. No.
Track Frame R1100-002001

Reference:X22-1036321 Page:R012000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000562
1

2
3

Reference:R1100-002001 Page:R012001

PC78US-8 S/N 15001-UP


Track Frame (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-30-12111 Track Frame 1 15001-
2 21W-30-41E81 Plate, Welded 2 15001-
3 01580-11613 Nut, Welded 2 15001-
4 07049-01418 Plug 8 15001-

Reference:R1100-002001 Page:R012001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Frame, Without Blade
FIG. Name FIG. No.
Track Frame R1100-003001

Reference:X22-1036311 Page:R013000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001360
1

2
3

Reference:R1100-003001 Page:R013001

PC78US-8 S/N 15001-UP


Track Frame (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-30-51111 Track Frame 1 15001-
2 21W-30-41E81 Plate, Welded 2 15001-
3 01580-11613 Nut, Welded 2 15001-

Reference:R1100-003001 Page:R013001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Frame, For Machine With Dozer Blade
FIG. Name FIG. No.
Track Frame R1100-004001

Reference:X22-1039060 Page:R014000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001361
1

2
3

Reference:R1100-004001 Page:R014001

PC78US-8 S/N 15001-UP


Track Frame (#15001-)
Index Code Part Number Description Qty Serial No.
1 22P-30-11111 Track Frame 1 15001-
2 21W-30-41E81 Plate, Welded 2 15001-
3 01580-11613 Nut, Welded 2 15001-

Reference:R1100-004001 Page:R014001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Frame, Strengthened
FIG. Name FIG. No.
Track Frame R1100-005001

Reference:X22-1039370 Page:R015000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001367
1

2
3

Reference:R1100-005001 Page:R015001

PC78US-8 S/N 15001-UP


Track Frame (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-30-51130 Track Frame 1 15001-
2 21W-30-41E81 Plate, Welded 2 15001-
3 01580-11613 Nut, Welded 2 15001-
4 07049-01418 Plug 8 15001-

Reference:R1100-005001 Page:R015001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Frame Cover
FIG. Name FIG. No.
Track Frame Cover R1130-001001

Reference:X22-1037420 Page:R016000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000563
5

8
7

10
9

6
2
3
12
1
13
11
11
13
12

Reference:R1130-001001 Page:R016001

PC78US-8 S/N 15001-UP


Track Frame Cover (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-30-41130 Bracket 1 15001-
2 01010-81230 Bolt 4 15001-
3 01643-31232 Washer 4 15001-
21W-30-41140 Cover Assembly 1 15001-
4 21W-30-41150 Cover 1 15001-
5 20X-30-21141 Seal 1 15001-
6 13S-30-15580 Seal 1 15001-
7 203-46-56160 Cover 1 15001-
8 203-46-61520 Gasket 1 15001-
9 01580-11008 Nut 2 15001-
10 01643-31032 Washer 2 15001-
11 22P-30-11130 Cover 2 15001-
12 01010-81025 Bolt 6 15001-
13 01643-31032 Washer 6 15001-

Reference:R1130-001001 Page:R016001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Frame Under Cover
FIG. Name FIG. No.
Track Frame Under Cover R1140-001001

Reference:X22-0452751 Page:R017000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001364

3
2

Reference:R1140-001001 Page:R017001

PC78US-8 S/N 15001-UP


Track Frame Under Cover (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-30-37120 Cover 1 15001-
2 01010-81225 Bolt 4 15001-
3 01643-31232 Washer 4 15001-

Reference:R1140-001001 Page:R017001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Guard, For Machine With Rubber Shoe
FIG. Name FIG. No.
Track Guard R1200-001001

Reference:X22-0094480 Page:R018000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000566

Reference:R1200-001001 Page:R018001

PC78US-8 S/N 15001-UP


Track Guard (#15001-)
Index Code Part Number Description Qty Serial No.
1 07049-01418 Plug 16 15001-

Reference:R1200-001001 Page:R018001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Guard
FIG. Name FIG. No.
Track Guard R1200-002001

Reference:X22-0450701 Page:R019000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000570

1 2

1 2

Reference:R1200-002001 Page:R019001

PC78US-8 S/N 15001-UP


Track Guard (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-30-34111 Guard 4 15001-
2 01010-81435 Bolt 16 15001-
3 01643-31445 Washer, Flat 16 15001-

Reference:R1200-002001 Page:R019001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Track Guard and Track Roller Guard, With Track Roller Guard
FIG. Name FIG. No.
Track Guard and Track Roller Guard R1200-003001

Reference:X22-0692710 Page:R020000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000567

3
4
1 2

1 2

Reference:R1200-003001 Page:R020001

PC78US-8 S/N 15001-UP


Track Guard and Track Roller Guard (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-30-34111 Guard 4 15001-
2 01010-81435 Bolt 16 15001-
3 01643-31445 Washer, Flat 16 15001-
4 201-30-61221 Guard 2 15001-
5 01010-81435 Bolt 8 15001-
6 01643-31445 Washer, Flat 8 15001-

Reference:R1200-003001 Page:R020001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
WORK EQUIPMENT
Unit Name Unit No.
Boom, For Machine With Additional Actuator X22-1039670
Boom, With 1-Additional Actuator Piping X22-1034841
Boom, With 1-Additional Actuator Piping, For Machine With Arm Holding Valve X22-1039680
Boom, 3710mm Strengthened Boom X22-1210100
Boom, 3710mm Strengthened Boom, 1-Attachment X22-1210080
Boom Cylinder, Without Arm Crane X22-1034861
Boom Cylinder, For Machine With Boom Holding Valve X22-1039690
Arm Cylinder, With Arm Anti-drop Valve X22-1039700
Arm Cylinder, Without Arm Anti-drop Valve X22-1030621
Arm, 1650mm X22-1039110
Arm, 1650mm Strengthened Type X22-1090620
Arm, 1650mm, With 1-Additional Actuator Piping X22-1039980
Arm, 2250mm X22-1039710
Arm, 2250mm, With 1-Additional Actuator Piping X22-1034901
Bucket Cylinder X22-1030641
Bucket Linkage, Without Arm Crane X22-0827220
Bucket Linkage, Demolition Specification X22-0698360
Bucket Pin X22-0699740
Bucket, 0.09m3, 483mm Width, Vertical Pin Type X22-0698460
Bucket, 0.13m3, 583mm Width, Vertical Pin Type X22-0698470
Bucket, 0.20m3, 674mm Width, Vertical Pin Type X22-0698480
Bucket, 0.28m3, 744mm Width, Horizontal Pin Type X22-0698500
Bucket, 0.28m3, 744mm Width, Vertical Pin Type, Division Adapter Type X22-0698490
Bucket, 0.28m3, 744mm Width, Vertical Pin Type, One Lip Adapter Type X22-0827250
Bucket, 0.28m3, Reinforced 744mm Width, Horizontal Pin Type X22-0698510
Bucket, 0.34m3, 755mm Width, Vertical Pin Type X22-0698520
Blade, Width 2320mm X22-1039120
Blade, Width 2320mm, With Bolt On Cutting Edge, Strengthened X22-1039130
Blade, Width 2470mm X22-1039720
Blade Cylinder X22-1035261

Reference: Page:T000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Boom, For Machine With Additional Actuator
FIG. Name FIG. No.
Boom, Boom and Bushing T1110-004001
Boom, Working Lamp T1110-004002
Boom, Pin T1110-004003
Boom, Piping T1110-004004
Boom, Bolt T1110-004005

Reference:X22-1039670 Page:T001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001580

6
4 5
4
6 5

Reference:T1110-004001 Page:T001001

PC78US-8 S/N 15001-UP


Boom, Boom and Bushing (#15001-)
Index Code Part Number Description Qty Serial No.
21W-70-01101 Boom Assembly 1 15001-
1 C1 Boom 1 15001-
201-70-71XE1 Bracket, Welded 1 15001-
2 201-70-71211 Bracket, Welded 1 15001-
3 203-46-41130 Seat, Welded 2 15001-
4 21W-70-41611 Bushing 2 15001-
5 07145-00065 Seal, Dust 2 15001-
6 07145-00065 Seal, Dust 2 15001-
7 07020-00675 Fitting, Grease 2 15001-

Reference:T1110-004001 Page:T001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA007624

9 1

4
5
6
1
8
10
12 13
9
8
7
8

1 9
2
3
14
15 11

Reference:T1110-004002 Page:T001002

PC78US-8 S/N 15001-UP


Boom, Working Lamp (#15001-)
Index Code Part Number Description Qty Serial No.
1 22B-06-11690 Lamp Assembly, Working 1 15001-
2 421-06-23330 Bulb, 70watt 1 15001-
3 22B-06-11990 Lens 1 16866-
4 22P-70-11980 Bracket 1 15001-
5 01010-81020 Bolt 1 15001-
6 01643-31032 Washer 1 15001-
7 21W-06-59110 Wiring Harness 1 15001-
8 21W-62-38390 Band 7 15001-
9 20T-54-74510 Cap 5 15001-
10 04434-51410 Clip 1 15001-
11 04434-51410 Clip 1 15001-
12 01010-81020 Bolt 1 15001-
13 01643-31032 Washer 1 15001-
14 01010-81020 Bolt 1 15001-
15 01643-31032 Washer 1 15001-

Reference:T1110-004002 Page:T001002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001582
16

13
15
14

12
19
17

18

1
20 6
2
4
3

11 5
7
8
10
9

Reference:T1110-004003 Page:T001003

PC78US-8 S/N 15001-UP


Boom, Pin (#15001-)
Index Code Part Number Description Qty Serial No.
1 201-70-71610 Pin 1 15001-
2 205-70-66580 Plate 1 15001-
3 01010-81230 Bolt 2 15001-
4 01643-31232 Washer 2 15001-
5 21Y-70-14770 Spacer, T=1.0mm 1 15001-
6 07020-00900 Fitting, Grease 1 15001-
7 201-70-71270 Shaft 1 15001-
8 205-70-66580 Plate 1 15001-
9 01010-81230 Bolt 2 15001-
10 01643-31232 Washer 2 15001-
11 21W-70-32280 Spacer, T=1.0mm 1 15001-
20U-70-31310 Spacer, T=0.5mm 1 15001-
12 22P-70-11121 Pin 1 15001-
13 205-70-66580 Plate 1 15001-
14 01010-81230 Bolt 2 15001-
15 01643-31232 Washer 2 15001-
16 201-70-71280 Spacer, T=1.0mm 1 15001-
17 07631-00205 Hose, Taper Seal Type 1 15001-
18 07238-10208 Connector 1 15001-
19 22W-44-13660 Elbow 1 15001-
20 07020-00000 Fitting, Grease 1 15001-

Reference:T1110-004003 Page:T001003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001590

12
4
2
12 13
8
12

6
13 10
13 12

13 11

13
5
7
11
3

9 13
11
13
8
11
10

Reference:T1110-004004 Page:T001004

PC78US-8 S/N 15001-UP


Boom, Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 02765-004A7 Hose, Face Seal Type 1 15001-
2 02765-005A7 Hose, Face Seal Type 1 15001-
3 21W-62-51660 Tube 1 15001-
4 02896-11012 O-ring 2 15001-
5 21W-62-51670 Tube 1 15001-
6 02896-11012 O-ring 2 15001-
7 21W-62-44141 Tube 1 15001-
8 02896-11012 O-ring 2 15001-
9 21W-62-44151 Tube 1 15001-
10 02896-11015 O-ring 2 15001-
11 22B-70-19280 Clamp 4 15001-
12 22B-70-19290 Plate 4 15001-
13 21W-70-44240 Cushion 12 15001-

Reference:T1110-004004 Page:T001004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001592

2 1

Reference:T1110-004005 Page:T001005

PC78US-8 S/N 15001-UP


Boom, Bolt (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81025 Bolt 16 15001-
2 01643-31032 Washer 16 15001-

Reference:T1110-004005 Page:T001005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Boom, With 1-Additional Actuator Piping
FIG. Name FIG. No.
Boom, Boom and Bushing T1110-002001
Boom, Working Lamp T1110-002002
Boom, Pin T1110-002003
Boom, Piping (1/2) T1110-002004
Boom, Piping (2/2) T1110-002005
Boom, Bolt T1110-002006

Reference:X22-1034841 Page:T002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001580

6
4 5
4
6 5

Reference:T1110-002001 Page:T002001

PC78US-8 S/N 15001-UP


Boom, Boom and Bushing (#15001-)
Index Code Part Number Description Qty Serial No.
21W-70-01101 Boom Assembly 1 15001-
1 C1 Boom 1 15001-
201-70-71XE1 Bracket, Welded 1 15001-
2 201-70-71211 Bracket, Welded 1 15001-
3 203-46-41130 Seat, Welded 2 15001-
4 21W-70-41611 Bushing 2 15001-
5 07145-00065 Seal, Dust 2 15001-
6 07145-00065 Seal, Dust 2 15001-
7 07020-00675 Fitting, Grease 2 15001-

Reference:T1110-002001 Page:T002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA007624

9 1

4
5
6
1
8
10
12 13
9
8
7
8

1 9
2
3
14
15 11

Reference:T1110-002002 Page:T002002

PC78US-8 S/N 15001-UP


Boom, Working Lamp (#15001-)
Index Code Part Number Description Qty Serial No.
1 22B-06-11690 Lamp Assembly, Working 1 15001-
2 421-06-23330 Bulb, 70watt 1 15001-
3 22B-06-11990 Lens 1 16866-
4 22P-70-11980 Bracket 1 15001-
5 01010-81020 Bolt 1 15001-
6 01643-31032 Washer 1 15001-
7 21W-06-59110 Wiring Harness 1 15001-
8 21W-62-38390 Band 7 15001-
9 20T-54-74510 Cap 5 15001-
10 04434-51410 Clip 1 15001-
11 04434-51410 Clip 1 15001-
12 01010-81020 Bolt 1 15001-
13 01643-31032 Washer 1 15001-
14 01010-81020 Bolt 1 15001-
15 01643-31032 Washer 1 15001-

Reference:T1110-002002 Page:T002002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001582
16

13
15
14

12
19
17

18

1
20 6
2
4
3

11 5
7
8
10
9

Reference:T1110-002003 Page:T002003

PC78US-8 S/N 15001-UP


Boom, Pin (#15001-)
Index Code Part Number Description Qty Serial No.
1 201-70-71610 Pin 1 15001-
2 205-70-66580 Plate 1 15001-
3 01010-81230 Bolt 2 15001-
4 01643-31232 Washer 2 15001-
5 21Y-70-14770 Spacer, T=1.0mm 1 15001-
6 07020-00900 Fitting, Grease 1 15001-
7 201-70-71270 Shaft 1 15001-
8 205-70-66580 Plate 1 15001-
9 01010-81230 Bolt 2 15001-
10 01643-31232 Washer 2 15001-
11 21W-70-32280 Spacer, T=1.0mm 1 15001-
20U-70-31310 Spacer, T=0.5mm 1 15001-
12 22P-70-11121 Pin 1 15001-
13 205-70-66580 Plate 1 15001-
14 01010-81230 Bolt 2 15001-
15 01643-31232 Washer 2 15001-
16 201-70-71280 Spacer, T=1.0mm 1 15001-
17 07631-00205 Hose, Taper Seal Type 1 15001-
18 07238-10208 Connector 1 15001-
19 22W-44-13660 Elbow 1 15001-
20 07020-00000 Fitting, Grease 1 15001-

Reference:T1110-002003 Page:T002003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001583

12 2
8

6
12 10
12

12

12
5
7

9 12
11
12
8

10

Reference:T1110-002004 Page:T002004

PC78US-8 S/N 15001-UP


Boom, Piping (1/2) (#15001-)
Index Code Part Number Description Qty Serial No.
1 02765-004A7 Hose, Face Seal Type 1 15001-
2 02765-005A7 Hose, Face Seal Type 1 15001-
3 21W-62-51660 Tube 1 15001-
4 02896-11012 O-ring 2 15001-
5 21W-62-51670 Tube 1 15001-
6 02896-11012 O-ring 2 15001-
7 21W-62-44141 Tube 1 15001-
8 02896-11012 O-ring 2 15001-
9 21W-62-44151 Tube 1 15001-
10 02896-11015 O-ring 2 15001-
11 22B-70-19280 Clamp 1 15001-
12 21W-70-44240 Cushion 12 15001-

Reference:T1110-002004 Page:T002004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001584

2
9
12
11

4
9
14 10
12 1

13

3 9
12 17

18
19 15

16 4
2

3 8 7

6
5

Reference:T1110-002005 Page:T002005

PC78US-8 S/N 15001-UP


Boom, Piping (2/2) (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-973-4610 Tube 1 15001-
2 02896-11018 O-ring 2 15001-
3 21W-973-5350 Tube 1 15001-
4 02896-11012 O-ring 2 15001-
5 07040-11007 Plug 1 15001-
6 07002-11023 O-ring 1 15001-
7 07040-12012 Plug 1 15001-
8 07002-12034 O-ring 1 15001-
9 201-973-6731 Clamp 3 15001-
10 21W-70-44571 Bracket 1 15001-
11 21W-70-44551 Bracket 1 15001-
12 21W-973-4860 Clamp 3 15001-
13 21W-70-44581 Bracket 1 15001-
14 21W-70-44561 Bracket 1 15001-
15 201-973-7431 Clamp 1 15001-
16 21W-70-44591 Bracket 1 15001-
17 201-973-6741 Seat 1 15001-
18 21W-62-44440 Seat 1 15001-
19 22B-70-19280 Clamp 2 15001-

Reference:T1110-002005 Page:T002005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001585
1
2
3
4
5
6
7
8
5
6

7
8

8 7

2 1

Reference:T1110-002006 Page:T002006

PC78US-8 S/N 15001-UP


Boom, Bolt (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81025 Bolt 6 15001-
2 01643-31032 Washer 6 15001-
3 01010-81035 Bolt 4 15001-
4 01643-31032 Washer 4 15001-
5 01010-81065 Bolt 4 15001-
6 01643-31032 Washer 4 15001-
7 01010-81070 Bolt 6 15001-
8 01643-31032 Washer 6 15001-

Reference:T1110-002006 Page:T002006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Boom, With 1-Additional Actuator Piping, For Machine With Arm Holding Valve
FIG. Name FIG. No.
Boom, Boom and Bushing T1110-006001
Boom, Working Lamp T1110-006002
Boom, Pin T1110-006003
Boom, Piping (1/3) T1110-006004
Boom, Piping (2/3) T1110-006005
Boom, Bolt T1110-006006
Boom, Piping (3/3) T1110-006007

Reference:X22-1039680 Page:T003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001580

6
4 5
4
6 5

Reference:T1110-006001 Page:T003001

PC78US-8 S/N 15001-UP


Boom, Boom and Bushing (#15001-)
Index Code Part Number Description Qty Serial No.
21W-70-01101 Boom Assembly 1 15001-
1 C1 Boom 1 15001-
201-70-71XE1 Bracket, Welded 1 15001-
2 201-70-71211 Bracket, Welded 1 15001-
3 203-46-41130 Seat, Welded 2 15001-
4 21W-70-41611 Bushing 2 15001-
5 07145-00065 Seal, Dust 2 15001-
6 07145-00065 Seal, Dust 2 15001-
7 07020-00675 Fitting, Grease 2 15001-

Reference:T1110-006001 Page:T003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA007624

9 1

4
5
6
1
8
10
12 13
9
8
7
8

1 9
2
3
14
15 11

Reference:T1110-006002 Page:T003002

PC78US-8 S/N 15001-UP


Boom, Working Lamp (#15001-)
Index Code Part Number Description Qty Serial No.
1 22B-06-11690 Lamp Assembly, Working 1 15001-
2 421-06-23330 Bulb, 70watt 1 15001-
3 22B-06-11990 Lens 1 16866-
4 22P-70-11980 Bracket 1 15001-
5 01010-81020 Bolt 1 15001-
6 01643-31032 Washer 1 15001-
7 21W-06-59110 Wiring Harness 1 15001-
8 21W-62-38390 Band 7 15001-
9 20T-54-74510 Cap 5 15001-
10 04434-51410 Clip 1 15001-
11 04434-51410 Clip 1 15001-
12 01010-81020 Bolt 1 15001-
13 01643-31032 Washer 1 15001-
14 01010-81020 Bolt 1 15001-
15 01643-31032 Washer 1 15001-

Reference:T1110-006002 Page:T003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001582
16

13
15
14

12
19
17

18

1
20 6
2
4
3

11 5
7
8
10
9

Reference:T1110-006003 Page:T003003

PC78US-8 S/N 15001-UP


Boom, Pin (#15001-)
Index Code Part Number Description Qty Serial No.
1 201-70-71610 Pin 1 15001-
2 205-70-66580 Plate 1 15001-
3 01010-81230 Bolt 2 15001-
4 01643-31232 Washer 2 15001-
5 21Y-70-14770 Spacer, T=1.0mm 1 15001-
6 07020-00900 Fitting, Grease 1 15001-
7 201-70-71270 Shaft 1 15001-
8 205-70-66580 Plate 1 15001-
9 01010-81230 Bolt 2 15001-
10 01643-31232 Washer 2 15001-
11 21W-70-32280 Spacer, T=1.0mm 1 15001-
20U-70-31310 Spacer, T=0.5mm 1 15001-
12 22P-70-11121 Pin 1 15001-
13 205-70-66580 Plate 1 15001-
14 01010-81230 Bolt 2 15001-
15 01643-31232 Washer 2 15001-
16 201-70-71280 Spacer, T=1.0mm 1 15001-
17 07631-00205 Hose, Taper Seal Type 1 15001-
18 07238-10208 Connector 1 15001-
19 22W-44-13660 Elbow 1 15001-
20 07020-00000 Fitting, Grease 1 15001-

Reference:T1110-006003 Page:T003003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001583

12 2
8

6
12 10
12

12

12
5
7

9 12
11
12
8

10

Reference:T1110-006004 Page:T003004

PC78US-8 S/N 15001-UP


Boom, Piping (1/3) (#15001-)
Index Code Part Number Description Qty Serial No.
1 02765-004A7 Hose, Face Seal Type 1 15001-
2 02765-005A7 Hose, Face Seal Type 1 15001-
3 21W-62-51660 Tube 1 15001-
4 02896-11012 O-ring 2 15001-
5 21W-62-51670 Tube 1 15001-
6 02896-11012 O-ring 2 15001-
7 21W-62-44141 Tube 1 15001-
8 02896-11012 O-ring 2 15001-
9 21W-62-44151 Tube 1 15001-
10 02896-11015 O-ring 2 15001-
11 22B-70-19280 Clamp 1 15001-
12 21W-70-44240 Cushion 12 15001-

Reference:T1110-006004 Page:T003004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001584

2
9
12
11

4
9
14 10
12 1

13

3 9
12 17

18
19 15

16 4
2

3 8 7

6
5

Reference:T1110-006005 Page:T003005

PC78US-8 S/N 15001-UP


Boom, Piping (2/3) (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-973-4610 Tube 1 15001-
2 02896-11018 O-ring 2 15001-
3 21W-973-5350 Tube 1 15001-
4 02896-11012 O-ring 2 15001-
5 07040-11007 Plug 1 15001-
6 07002-11023 O-ring 1 15001-
7 07040-12012 Plug 1 15001-
8 07002-12034 O-ring 1 15001-
9 201-973-6731 Clamp 3 15001-
10 21W-70-44571 Bracket 1 15001-
11 21W-70-44551 Bracket 1 15001-
12 21W-973-4860 Clamp 3 15001-
13 21W-70-44581 Bracket 1 15001-
14 21W-70-44561 Bracket 1 15001-
15 201-973-7431 Clamp 1 15001-
16 21W-70-44591 Bracket 1 15001-
17 201-973-6741 Seat 1 15001-
18 21W-62-44440 Seat 1 15001-
19 22B-70-19280 Clamp 2 15001-

Reference:T1110-006005 Page:T003005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001585
1
2
3
4
5
6
7
8
5
6

7
8

8 7

2 1

Reference:T1110-006006 Page:T003006

PC78US-8 S/N 15001-UP


Boom, Bolt (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81025 Bolt 6 15001-
2 01643-31032 Washer 6 15001-
3 01010-81035 Bolt 4 15001-
4 01643-31032 Washer 4 15001-
5 01010-81065 Bolt 4 15001-
6 01643-31032 Washer 4 15001-
7 01010-81070 Bolt 6 15001-
8 01643-31032 Washer 6 15001-

Reference:T1110-006006 Page:T003006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002116

17 19

14
4 15
11

16
8 20

9 2 18

7 13
12

3
1 10
2

6
5

Reference:T1110-006007 Page:T003007

PC78US-8 S/N 15001-UP


Boom, Piping (3/3) (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-46332 Tube 1 15001-
2 02896-11012 O-ring 2 15001-
3 21W-70-56360 Bracket 1 15001-
4 02896-11008 O-ring 2 15001-
5 01010-81030 Bolt 2 15001-
6 01643-31032 Washer 2 15001-
7 21W-70-51290 Bracket 1 15001-
8 01010-81075 Bolt 2 15001-
9 01643-31032 Washer 2 15001-
10 21W-973-4860 Clamp 1 15001-
11 21W-973-4860 Clamp 1 15001-
12 01010-81025 Bolt 2 15001-
13 01643-31032 Washer 2 15001-
14 01010-81025 Bolt 2 15001-
15 01643-31032 Washer 2 15001-
16 02765-004A7 Hose, Face Seal Type 1 15001-
17 21W-62-51621 Hose Assembly, Green 1 15001-
18 21W-62-38390 Band 3 15001-
19 21W-62-38390 Band 5 15001-
20 04434-51510 Clip 1 15001-

Reference:T1110-006007 Page:T003007
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Boom, 3710mm Strengthened Boom
FIG. Name FIG. No.
Boom, Boom and Bushing T1110-024001
Boom, Working Lamp T1110-024002
Boom, Pin T1110-024003
Boom, Piping T1110-024004
Boom, Bolt T1110-024005

Reference:X22-1210100 Page:T004000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006699

6
4 5
4
6 5

Reference:T1110-024001 Page:T004001

PC78US-8 S/N 15001-UP


Boom, Boom and Bushing (#15001-)
Index Code Part Number Description Qty Serial No.
21W-70-01292 Boom Assembly 1 15001-
1 C1 Boom 1 15001-
2 201-70-71211 Bracket, Welded 1 15001-
3 203-46-41130 Seat, Welded 2 15001-
4 21W-70-41611 Bushing 2 15001-
5 07145-00065 Seal, Dust 2 15001-
6 07145-00065 Seal, Dust 2 15001-
7 07020-00675 Fitting, Grease 2 15001-

Reference:T1110-024001 Page:T004001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA007624

9 1

4
5
6
1
8
10
12 13
9
8
7
8

1 9
2
3
14
15 11

Reference:T1110-024002 Page:T004002

PC78US-8 S/N 15001-UP


Boom, Working Lamp (#15001-)
Index Code Part Number Description Qty Serial No.
1 22B-06-11690 Lamp Assembly, Working 1 15001-
2 421-06-23330 Bulb, 70watt 1 15001-
3 22B-06-11990 Lens 1 16866-
4 22P-70-11980 Bracket 1 15001-
5 01010-81020 Bolt 1 15001-
6 01643-31032 Washer 1 15001-
7 21W-06-59110 Wiring Harness 1 15001-
8 21W-62-38390 Band 7 15001-
9 20T-54-74510 Cap 5 15001-
10 04434-51410 Clip 1 15001-
11 04434-51410 Clip 1 15001-
12 01010-81020 Bolt 1 15001-
13 01643-31032 Washer 1 15001-
14 01010-81020 Bolt 1 15001-
15 01643-31032 Washer 1 15001-

Reference:T1110-024002 Page:T004002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001582
16

13
15
14

12
19
17

18

1
20 6
2
4
3

11 5
7
8
10
9

Reference:T1110-024003 Page:T004003

PC78US-8 S/N 15001-UP


Boom, Pin (#15001-)
Index Code Part Number Description Qty Serial No.
1 201-70-71610 Pin 1 15001-
2 205-70-66580 Plate 1 15001-
3 01010-81230 Bolt 2 15001-
4 01643-31232 Washer 2 15001-
5 21Y-70-14770 Spacer, T=1.0mm 1 15001-
6 07020-00900 Fitting, Grease 1 15001-
7 201-70-71270 Shaft 1 15001-
8 205-70-66580 Plate 1 15001-
9 01010-81230 Bolt 2 15001-
10 01643-31232 Washer 2 15001-
11 21W-70-32280 Spacer, T=1.0mm 1 15001-
20U-70-31310 Spacer, T=0.5mm 1 15001-
12 22P-70-11121 Pin 1 15001-
13 205-70-66580 Plate 1 15001-
14 01010-81230 Bolt 2 15001-
15 01643-31232 Washer 2 15001-
16 201-70-71280 Spacer, T=1.0mm 1 15001-
17 07631-00205 Hose, Taper Seal Type 1 15001-
18 07238-10208 Connector 1 15001-
19 22W-44-13660 Elbow 1 15001-
20 07020-00000 Fitting, Grease 1 15001-

Reference:T1110-024003 Page:T004003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001590

12
4
2
12 13
8
12

6
13 10
13 12

13 11

13
5
7
11
3

9 13
11
13
8
11
10

Reference:T1110-024004 Page:T004004

PC78US-8 S/N 15001-UP


Boom, Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 02765-004A7 Hose, Face Seal Type 1 15001-
2 02765-005A7 Hose, Face Seal Type 1 15001-
3 21W-62-51660 Tube 1 15001-
4 02896-11012 O-ring 2 15001-
5 21W-62-51670 Tube 1 15001-
6 02896-11012 O-ring 2 15001-
7 21W-62-44141 Tube 1 15001-
8 02896-11012 O-ring 2 15001-
9 21W-62-44151 Tube 1 15001-
10 02896-11015 O-ring 2 15001-
11 22B-70-19280 Clamp 4 15001-
12 22B-70-19290 Plate 4 15001-
13 21W-70-44240 Cushion 12 15001-

Reference:T1110-024004 Page:T004004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001592

2 1

Reference:T1110-024005 Page:T004005

PC78US-8 S/N 15001-UP


Boom, Bolt (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81025 Bolt 16 15001-
2 01643-31032 Washer 16 15001-

Reference:T1110-024005 Page:T004005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Boom, 3710mm Strengthened Boom, 1-Attachment
FIG. Name FIG. No.
Boom, Boom and Bushing T1110-023001
Boom, Working Lamp T1110-023002
Boom, Pin T1110-023003
Boom, Piping (1/2) T1110-023004
Boom, Piping (2/2) T1110-023005
Boom, Bolt T1110-023006

Reference:X22-1210080 Page:T005000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA006699

6
4 5
4
6 5

Reference:T1110-023001 Page:T005001

PC78US-8 S/N 15001-UP


Boom, Boom and Bushing (#15001-)
Index Code Part Number Description Qty Serial No.
21W-70-01292 Boom Assembly 1 15001-
1 C1 Boom 1 15001-
2 201-70-71211 Bracket, Welded 1 15001-
3 203-46-41130 Seat, Welded 2 15001-
4 21W-70-41611 Bushing 2 15001-
5 07145-00065 Seal, Dust 2 15001-
6 07145-00065 Seal, Dust 2 15001-
7 07020-00675 Fitting, Grease 2 15001-

Reference:T1110-023001 Page:T005001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA007624

9 1

4
5
6
1
8
10
12 13
9
8
7
8

1 9
2
3
14
15 11

Reference:T1110-023002 Page:T005002

PC78US-8 S/N 15001-UP


Boom, Working Lamp (#15001-)
Index Code Part Number Description Qty Serial No.
1 22B-06-11690 Lamp Assembly, Working 1 15001-
2 421-06-23330 Bulb, 70watt 1 15001-
3 22B-06-11990 Lens 1 16866-
4 22P-70-11980 Bracket 1 15001-
5 01010-81020 Bolt 1 15001-
6 01643-31032 Washer 1 15001-
7 21W-06-59110 Wiring Harness 1 15001-
8 21W-62-38390 Band 7 15001-
9 20T-54-74510 Cap 5 15001-
10 04434-51410 Clip 1 15001-
11 04434-51410 Clip 1 15001-
12 01010-81020 Bolt 1 15001-
13 01643-31032 Washer 1 15001-
14 01010-81020 Bolt 1 15001-
15 01643-31032 Washer 1 15001-

Reference:T1110-023002 Page:T005002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001582
16

13
15
14

12
19
17

18

1
20 6
2
4
3

11 5
7
8
10
9

Reference:T1110-023003 Page:T005003

PC78US-8 S/N 15001-UP


Boom, Pin (#15001-)
Index Code Part Number Description Qty Serial No.
1 201-70-71610 Pin 1 15001-
2 205-70-66580 Plate 1 15001-
3 01010-81230 Bolt 2 15001-
4 01643-31232 Washer 2 15001-
5 21Y-70-14770 Spacer, T=1.0mm 1 15001-
6 07020-00900 Fitting, Grease 1 15001-
7 201-70-71270 Shaft 1 15001-
8 205-70-66580 Plate 1 15001-
9 01010-81230 Bolt 2 15001-
10 01643-31232 Washer 2 15001-
11 21W-70-32280 Spacer, T=1.0mm 1 15001-
20U-70-31310 Spacer, T=0.5mm 1 15001-
12 22P-70-11121 Pin 1 15001-
13 205-70-66580 Plate 1 15001-
14 01010-81230 Bolt 2 15001-
15 01643-31232 Washer 2 15001-
16 201-70-71280 Spacer, T=1.0mm 1 15001-
17 07631-00205 Hose, Taper Seal Type 1 15001-
18 07238-10208 Connector 1 15001-
19 22W-44-13660 Elbow 1 15001-
20 07020-00000 Fitting, Grease 1 15001-

Reference:T1110-023003 Page:T005003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001583

12 2
8

6
12 10
12

12

12
5
7

9 12
11
12
8

10

Reference:T1110-023004 Page:T005004

PC78US-8 S/N 15001-UP


Boom, Piping (1/2) (#15001-)
Index Code Part Number Description Qty Serial No.
1 02765-004A7 Hose, Face Seal Type 1 15001-
2 02765-005A7 Hose, Face Seal Type 1 15001-
3 21W-62-51660 Tube 1 15001-
4 02896-11012 O-ring 2 15001-
5 21W-62-51670 Tube 1 15001-
6 02896-11012 O-ring 2 15001-
7 21W-62-44141 Tube 1 15001-
8 02896-11012 O-ring 2 15001-
9 21W-62-44151 Tube 1 15001-
10 02896-11015 O-ring 2 15001-
11 22B-70-19280 Clamp 1 15001-
12 21W-70-44240 Cushion 12 15001-

Reference:T1110-023004 Page:T005004
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001584

2
9
12
11

4
9
14 10
12 1

13

3 9
12 17

18
19 15

16 4
2

3 8 7

6
5

Reference:T1110-023005 Page:T005005

PC78US-8 S/N 15001-UP


Boom, Piping (2/2) (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-973-4610 Tube 1 15001-
2 02896-11018 O-ring 2 15001-
3 21W-973-5350 Tube 1 15001-
4 02896-11012 O-ring 2 15001-
5 07040-11007 Plug 1 15001-
6 07002-11023 O-ring 1 15001-
7 07040-12012 Plug 1 15001-
8 07002-12034 O-ring 1 15001-
9 201-973-6731 Clamp 3 15001-
10 21W-70-44571 Bracket 1 15001-
11 21W-70-44551 Bracket 1 15001-
12 21W-973-4860 Clamp 3 15001-
13 21W-70-44581 Bracket 1 15001-
14 21W-70-44561 Bracket 1 15001-
15 201-973-7431 Clamp 1 15001-
16 21W-70-44591 Bracket 1 15001-
17 201-973-6741 Seat 1 15001-
18 21W-62-44440 Seat 1 15001-
19 22B-70-19280 Clamp 2 15001-

Reference:T1110-023005 Page:T005005
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001585
1
2
3
4
5
6
7
8
5
6

7
8

8 7

2 1

Reference:T1110-023006 Page:T005006

PC78US-8 S/N 15001-UP


Boom, Bolt (#15001-)
Index Code Part Number Description Qty Serial No.
1 01010-81025 Bolt 6 15001-
2 01643-31032 Washer 6 15001-
3 01010-81035 Bolt 4 15001-
4 01643-31032 Washer 4 15001-
5 01010-81065 Bolt 4 15001-
6 01643-31032 Washer 4 15001-
7 01010-81070 Bolt 6 15001-
8 01643-31032 Washer 6 15001-

Reference:T1110-023006 Page:T005006
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Boom Cylinder, Without Arm Crane
FIG. Name FIG. No.
Boom Cylinder, Inner Parts T1120-001001

Reference:X22-1034861 Page:T006000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011366
15
16
15
16
18
17
14
13
10
11
12

8 5

7 1
23
8 2
25 4
26
5
24

22 2
21
19
20
9

Reference:T1120-001001 Page:T006001

PC78US-8 S/N 15001-UP


Boom Cylinder, Inner Parts (#15001-)
Index Code Part Number Description Qty Serial No.
707-00-0H930 Cylinder Assembly 1 15001-
1 707-11-11F50 Cylinder 1 15001-
2 02896-11012 O-ring, (Kit : K04) 2 15001-
3 707-58-65870 Rod, Piston 1 15001-
4 707-76-65521 Bushing 1 15001-
5 07145-00065 Seal, Dust, (Kit : K04) 2 15001-
6 07020-00000 Fitting, Grease 1 15001-
7 707-76-60711 Bushing 1 15001-
8 07145-00060 Seal, Dust, (Kit : K04) 2 15001-
9 707-71-70720 Plunger 1 15001-
10 707-29-11860 Head, Cylinder 1 15001-
11 707-56-65740 Seal, Dust, (Kit : K04) 1 15001-
12 07179-12079 Ring, Snap 1 15001-
13 707-52-10661 Bushing 1 15001-
14 707-51-65211 Packing, Rod, (Kit : K04) 1 15001-
15 707-35-91610 Ring, Back-up, (Kit : K04) 2 15001-
16 07000-12110 O-ring, (Kit : K04) 2 15001-
17 07000-12115 O-ring, (Kit : K04) 1 15001-
18 707-35-91630 Ring, Back-up, (Kit : K04) 1 15001-
19 707-36-11610 Piston 1 15001-
20 707-44-11280 Ring, Piston, (Kit : K04) 1 15001-
21 707-39-11510 Ring, Wear, (Kit : K04) 1 15001-
22 707-67-45020 Nut 1 15001-
23 707-86-46920 Tube 1 15001-
24 02896-11015 O-ring, (Kit : K04) 1 15001-
25 01010-81020 Bolt 1 15001-
26 01643-31032 Washer 1 15001-

Reference:T1120-001001 Page:T006001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Boom Cylinder, For Machine With Boom Holding Valve
FIG. Name FIG. No.
Boom Cylinder, Inner Parts T1120-003001
Boom Cylinder, Inner Parts, Anti-drop Valve T1120-003002
Boom Cylinder, Mounting T1120-003003

Reference:X22-1039690 Page:T007000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011367
15
16
15
16
18
17
14
13
10
11
12

8 5

7 1
8 2
4
5

22 2
21
19
20
9

Reference:T1120-003001 Page:T007001

PC78US-8 S/N 15001-UP


Boom Cylinder, Inner Parts (#15001-)
Index Code Part Number Description Qty Serial No.
707-00-0H930 Cylinder Assembly 1 15001-
1 707-11-11F50 Cylinder 1 15001-
2 02896-11012 O-ring, (Kit : K04) 2 15001-
3 707-58-65870 Rod, Piston 1 15001-
4 707-76-65521 Bushing 1 15001-
5 07145-00065 Seal, Dust, (Kit : K04) 2 15001-
6 07020-00000 Fitting, Grease 1 15001-
7 707-76-60711 Bushing 1 15001-
8 07145-00060 Seal, Dust, (Kit : K04) 2 15001-
9 707-71-70720 Plunger 1 15001-
10 707-29-11860 Head, Cylinder 1 15001-
11 707-56-65740 Seal, Dust, (Kit : K04) 1 15001-
12 07179-12079 Ring, Snap 1 15001-
13 707-52-10661 Bushing 1 15001-
14 707-51-65211 Packing, Rod, (Kit : K04) 1 15001-
15 707-35-91610 Ring, Back-up, (Kit : K04) 2 15001-
16 07000-12110 O-ring, (Kit : K04) 2 15001-
17 07000-12115 O-ring, (Kit : K04) 1 15001-
18 707-35-91630 Ring, Back-up, (Kit : K04) 1 15001-
19 707-36-11610 Piston 1 15001-
20 707-44-11280 Ring, Piston, (Kit : K04) 1 15001-
21 707-39-11510 Ring, Wear, (Kit : K04) 1 15001-
22 707-67-45020 Nut 1 15001-

Reference:T1120-003001 Page:T007001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012863
11

12
17 13
15
16
14

1
2

10

Reference:T1120-003002 Page:T007002

PC78US-8 S/N 15001-UP


Boom Cylinder, Inner Parts, Anti-drop Valve (#15001-)
Index Code Part Number Description Qty Serial No.
702-21-08612 Valve, Pilot 1 15001-
1 C1 Body, Valve 1 15001-
2 C1 Spool 1 15001-
3 702-21-38830 Plate 1 15001-
4 C1 Retainer, L=2.0mm 1 15001-
C1 Retainer, L=2.3mm 1 15001-
C1 Retainer, L=2.15mm 1 15001-
5 702-21-38840 Plate 1 15001-
6 702-21-38920 Spring 1 15001-
7 702-21-38910 Spring 1 15001-
8 709-25-11620 O-ring 1 15001-
9 700-22-11410 O-ring 1 15001-
10 01252-60616 Bolt, Hexagon Socket Head 2 15001-
11 01252-60816 Bolt, Hexagon Socket Head 2 15001-
12 702-21-38940 Plug 1 15001-
13 07002-12034 O-ring 1 15001-
14 C1 Valve 1 15001-
15 702-21-38960 Spring 1 15001-
16 723-20-63600 Valve Assembly, Suction and Relief 1 15001-
17 07002-12034 O-ring 2 15001-

Reference:T1120-003002 Page:T007002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002117

18
24
27 23
28 17

31
32
26
25
29
18
30
24

23
6
4
3 5 19
20
1 21
8 20
19
2 22
7 15
34 16
13 10
12
9
14 33
11

Reference:T1120-003003 Page:T007003

PC78US-8 S/N 15001-UP


Boom Cylinder, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
1 02781-00422 Union 1 15001-
2 07002-12034 O-ring 1 15001-
3 02896-11012 O-ring 1 15001-
4 21W-62-46660 Nipple 1 15001-
5 07002-12434 O-ring 1 15001-
6 02896-11015 O-ring 1 15001-
7 21W-62-46770 Joint 1 15001-
8 07002-12034 O-ring 1 15001-
9 21W-62-42450 Nipple 1 15001-
10 07002-12434 O-ring 1 15001-
11 02896-11012 O-ring 1 15001-
12 02782-10210 Elbow 1 15001-
13 07002-11423 O-ring 1 15001-
14 02896-11008 O-ring 1 15001-
15 21W-62-41312 Band 1 15001-
16 21W-62-46211 Bracket 1 15001-
17 21W-62-46512 Band 1 15001-
18 21Y-62-24310 Band 2 15001-
19 01010-80816 Bolt 4 15001-
20 01643-30823 Washer 4 15001-
21 01010-80825 Bolt 2 15001-
22 01643-30823 Washer 2 15001-
23 01010-81035 Bolt 4 15001-
24 01643-31032 Washer 4 15001-
25 21W-62-46442 Tube 1 15001-
26 02896-11012 O-ring 1 15001-
27 01010-81020 Bolt 1 15001-
28 01643-31032 Washer 1 15001-
29 21W-62-46432 Tube 1 15001-
30 02896-11015 O-ring 1 15001-
Reference:T1120-003003 Page:T007003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Boom Cylinder, Mounting (#15001-)
Index Code Part Number Description Qty Serial No.
31 01010-81020 Bolt 1 15001-
32 01643-31032 Washer 1 15001-
33 21W-62-46491 Tube 1 15001-
34 7861-93-1812 Sensor, Pressure 1 15950-
A2 7861-93-1811 Sensor, Pressure 1 15001-15949
07002-61823 O-ring 1 15950-
07002-11823 O-ring 1 15001-15949

Reference:T1120-003003 Page:T007003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm Cylinder, With Arm Anti-drop Valve
FIG. Name FIG. No.
Arm Cylinder, Inner Parts T1140-003001
Arm Cylinder, Inner Parts, Anti-drop Valve T1140-003002
Arm Cylinder, Arm Anti-drop Valve Piping T1140-003003

Reference:X22-1039700 Page:T008000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011369
18
19
18
19
21
20
17
16
13
14
15
11
12

10

7 6 3
8
5
6

25
24
22
23
9

Reference:T1140-003001 Page:T008001

PC78US-8 S/N 15001-UP


Arm Cylinder, Inner Parts (#15001-)
Index Code Part Number Description Qty Serial No.
707-00-0H740 Cylinder Assembly 1 15001-
1 707-11-10H50 Cylinder 1 15001-
2 02896-11012 O-ring, (Kit : K05) 1 15001-
3 02896-11015 O-ring, (Kit : K05) 1 15001-
4 721-58-60740 Rod, Piston 1 15001-
5 707-76-55531 Bushing 1 15001-
6 07145-00055 Seal, Dust, (Kit : K05) 2 15001-
7 707-76-60711 Bushing 1 15001-
8 07145-00060 Seal, Dust, (Kit : K05) 2 15001-
9 707-71-70750 Plunger 1 15001-
10 707-71-60100 Plunger 1 15001-
11 04260-00635 Ball, Steel 9 15001-
12 707-71-91280 Cap 1 15001-
13 707-29-10342 Head, Cylinder 1 15001-
14 707-56-60740 Seal, Dust, (Kit : K05) 1 15001-
15 07179-12074 Ring, Snap 1 15001-
16 707-52-15330 Bushing 1 15001-
17 707-51-60211 Packing, Rod, (Kit : K05) 1 15001-
18 07146-02096 Ring, Back-up, (Kit : K05) 2 15001-
19 07000-12095 O-ring, (Kit : K05) 2 15001-
20 07000-12100 O-ring, (Kit : K05) 1 15001-
21 707-35-91050 Ring, Back-up, (Kit : K05) 1 15001-
22 707-36-10420 Piston 1 15001-
23 707-44-10180 Ring, Piston, (Kit : K05) 1 15001-
24 07156-01012 Ring, Wear, (Kit : K05) 1 15001-
25 707-67-42020 Nut 1 15001-

Reference:T1140-003001 Page:T008001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY012863
11

12
17 13
15
16
14

1
2

10

Reference:T1140-003002 Page:T008002

PC78US-8 S/N 15001-UP


Arm Cylinder, Inner Parts, Anti-drop Valve (#15001-)
Index Code Part Number Description Qty Serial No.
702-21-08612 Valve, Pilot 1 15001-
1 C1 Body, Valve 1 15001-
2 C1 Spool 1 15001-
3 702-21-38830 Plate 1 15001-
4 C1 Retainer, L=2.0mm 1 15001-
C1 Retainer, L=2.3mm 1 15001-
C1 Retainer, L=2.15mm 1 15001-
5 702-21-38840 Plate 1 15001-
6 702-21-38920 Spring 1 15001-
7 702-21-38910 Spring 1 15001-
8 709-25-11620 O-ring 1 15001-
9 700-22-11410 O-ring 1 15001-
10 01252-60616 Bolt, Hexagon Socket Head 2 15001-
11 01252-60816 Bolt, Hexagon Socket Head 2 15001-
12 702-21-38940 Plug 1 15001-
13 07002-12034 O-ring 1 15001-
14 C1 Valve 1 15001-
15 702-21-38960 Spring 1 15001-
16 723-20-63600 Valve Assembly, Suction and Relief 1 15001-
17 07002-12034 O-ring 2 15001-

Reference:T1140-003002 Page:T008002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002118
33
32 34

31
21
14 22
13
6
4
5
20 19
15
9 27
8 6
7 28
17

11
10
12 3
1 26
25 2
29
30

16

18

24
23

Reference:T1140-003003 Page:T008003

PC78US-8 S/N 15001-UP


Arm Cylinder, Arm Anti-drop Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-62-42450 Nipple 1 15001-
2 07002-12434 O-ring 1 15001-
3 02896-11012 O-ring 1 15001-
4 21W-62-42860 Nipple 1 15001-
5 07002-12034 O-ring 1 15001-
6 02896-11012 O-ring 2 15001-
7 02789-00422 Plug, Face Seal Type 1 15001-
8 07040-12012 Plug 1 15001-
9 07002-12034 O-ring 1 15001-
10 21W-62-42450 Nipple 1 15001-
11 07002-12434 O-ring 1 15001-
12 02896-11012 O-ring 1 15001-
13 02782-10210 Elbow 1 15001-
14 07002-11423 O-ring 1 15001-
15 02896-11008 O-ring 1 15001-
16 21W-62-46412 Band 1 15001-
17 21W-62-46211 Bracket 1 15001-
18 21W-62-47470 Clamp 1 15001-
19 01010-80816 Bolt 4 15001-
20 01643-30823 Washer 4 15001-
21 01010-80825 Bolt 2 15001-
22 01643-30823 Washer 2 15001-
23 01010-81035 Bolt 2 15001-
24 01643-31032 Washer 2 15001-
25 21W-62-46172 Tube 1 15001-
26 21W-62-46182 Tube 1 15001-
27 02896-11012 O-ring 1 15001-
28 07283-32236 Clip, Pipe 1 15001-
29 01643-31032 Washer 2 15001-
30 01599-01011 Nut 2 15001-
Reference:T1140-003003 Page:T008003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm Cylinder, Arm Anti-drop Valve Piping (#15001-)
Index Code Part Number Description Qty Serial No.
31 22P-70-11910 Tube 1 15001-
32 02896-11012 O-ring 1 15001-
33 01010-81020 Bolt 1 15001-
34 01643-31032 Washer 1 15001-

Reference:T1140-003003 Page:T008003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm Cylinder, Without Arm Anti-drop Valve
FIG. Name FIG. No.
Arm Cylinder, Inner Parts T1140-001001

Reference:X22-1030621 Page:T009000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011368
18
19
18
19
21
20
17
16
13
14
15
11
12

10

27
8
28

7 6
26 3
8
5

2 6
30
29

25
24
22
23
9

Reference:T1140-001001 Page:T009001

PC78US-8 S/N 15001-UP


Arm Cylinder, Inner Parts (#15001-)
Index Code Part Number Description Qty Serial No.
707-00-0H740 Cylinder Assembly 1 15001-
1 707-11-10H50 Cylinder 1 15001-
2 02896-11012 O-ring, (Kit : K05) 1 15001-
3 02896-11015 O-ring, (Kit : K05) 1 15001-
4 721-58-60740 Rod, Piston 1 15001-
5 707-76-55531 Bushing 1 15001-
6 07145-00055 Seal, Dust, (Kit : K05) 2 15001-
7 707-76-60711 Bushing 1 15001-
8 07145-00060 Seal, Dust, (Kit : K05) 2 15001-
9 707-71-70750 Plunger 1 15001-
10 707-71-60100 Plunger 1 15001-
11 04260-00635 Ball, Steel 9 15001-
12 707-71-91280 Cap 1 15001-
13 707-29-10342 Head, Cylinder 1 15001-
14 707-56-60740 Seal, Dust, (Kit : K05) 1 15001-
15 07179-12074 Ring, Snap 1 15001-
16 707-52-15330 Bushing 1 15001-
17 707-51-60211 Packing, Rod, (Kit : K05) 1 15001-
18 07146-02096 Ring, Back-up, (Kit : K05) 2 15001-
19 07000-12095 O-ring, (Kit : K05) 2 15001-
20 07000-12100 O-ring, (Kit : K05) 1 15001-
21 707-35-91050 Ring, Back-up, (Kit : K05) 1 15001-
22 707-36-10420 Piston 1 15001-
23 707-44-10180 Ring, Piston, (Kit : K05) 1 15001-
24 07156-01012 Ring, Wear, (Kit : K05) 1 15001-
25 707-67-42020 Nut 1 15001-
26 707-86-48590 Tube 1 15001-
27 02896-11012 O-ring, (Kit : K05) 1 15001-
28 07283-32236 Clip, Pipe 1 15001-
29 01643-31032 Washer 2 15001-
Reference:T1140-001001 Page:T009001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm Cylinder, Inner Parts (#15001-)
Index Code Part Number Description Qty Serial No.
30 01597-01009 Nut 2 15001-

Reference:T1140-001001 Page:T009001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm, 1650mm
FIG. Name FIG. No.
Arm, Arm and Pin T1210-002001

Reference:X22-1039110 Page:T010000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001566
12

20
8
4
13

23
7
24
4 9
20 11
10
15
17
1 16

18 14
21
2 19
7

2
21

22 5
3

3
22

Reference:T1210-002001 Page:T010001

PC78US-8 S/N 15001-UP


Arm, Arm and Pin (#15001-)
Index Code Part Number Description Qty Serial No.
22P-70-01131 Arm Assembly 1 15703-
A2 22P-70-01130 Arm Assembly 1 15001-15702
1 C1 Arm 1 15703-
C1 Arm 1 15001-15702
2 21W-70-41361 Bushing 2 15001-
3 20X-70-22140 Bushing 2 15001-
4 21W-70-51340 Bushing 2 15703-
21W-70-41621 Bushing 2 15001-15702
5 07020-00000 Fitting, Grease 1 15001-
6 07020-00900 Fitting, Grease 1 15001-
7 21W-62-44230 Hose 2 15001-
8 21W-70-44321 Pin 1 15001-
9 205-70-66580 Plate 1 15001-
10 01010-81230 Bolt 2 15001-
11 01643-31232 Washer 2 15001-
12 21Y-70-14770 Spacer, T=1.0mm 2 15001-
13 07020-00000 Fitting, Grease 1 15001-
14 22P-70-11311 Pin 1 15001-
15 205-70-66580 Plate 1 15001-
16 01010-81230 Bolt 2 15001-
17 01643-31232 Washer 2 15001-
18 22C-70-31510 Spacer, T=1.0mm 2 15001-
19 07020-00000 Fitting, Grease 1 15001-
20 07145-00060 Seal, Dust 2 15001-
21 21W-70-41430 Seal 2 15001-
22 130-09-12931 Seal 2 15001-
23 (21W-62-51660) Tube
(21W-62-51660) Tube
(21W-62-51660) Tube
24 (21W-62-51670) Tube
Reference:T1210-002001 Page:T010001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm, Arm and Pin (#15001-)
Index Code Part Number Description Qty Serial No.
(21W-62-51670) Tube
(21W-62-51670) Tube

Reference:T1210-002001 Page:T010001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm, 1650mm Strengthened Type
FIG. Name FIG. No.
Arm, Arm and Pin T1210-007001

Reference:X22-1090620 Page:T011000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002123
12

20
8
4
13

23
7
24
4 9
20 11
10
15
17
1 16

18 14
21
2 19
7

2
21

22 5
3

3
22

Reference:T1210-007001 Page:T011001

PC78US-8 S/N 15001-UP


Arm, Arm and Pin (#15001-)
Index Code Part Number Description Qty Serial No.
22P-70-01141 Arm Assembly 1 15703-
A2 22P-70-01140 Arm Assembly 1 15001-15702
1 C1 Arm 1 15703-
C1 Arm 1 15001-15702
2 21W-70-41361 Bushing 2 15001-
3 20X-70-22140 Bushing 2 15001-
4 21W-70-51340 Bushing 2 15703-
21W-70-41621 Bushing 2 15001-15702
5 07020-00000 Fitting, Grease 1 15001-
6 07020-00900 Fitting, Grease 1 15001-
7 21W-62-44230 Hose 2 15001-
8 21W-70-44321 Pin 1 15001-
9 205-70-66580 Plate 1 15001-
10 01010-81230 Bolt 2 15001-
11 01643-31232 Washer 2 15001-
12 21Y-70-14770 Spacer, T=1.0mm 2 15001-
13 07020-00000 Fitting, Grease 1 15001-
14 22P-70-11311 Pin 1 15001-
15 205-70-66580 Plate 1 15001-
16 01010-81230 Bolt 2 15001-
17 01643-31232 Washer 2 15001-
18 22C-70-31510 Spacer, T=1.0mm 2 15001-
19 07020-00000 Fitting, Grease 1 15001-
20 07145-00060 Seal, Dust 2 15001-
21 21W-70-41430 Seal 2 15001-
22 130-09-12931 Seal 2 15001-
23 (21W-62-51660) Tube
(21W-62-51660) Tube
(21W-62-51660) Tube
24 (21W-62-51670) Tube
Reference:T1210-007001 Page:T011001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm, Arm and Pin (#15001-)
Index Code Part Number Description Qty Serial No.
(21W-62-51670) Tube
(21W-62-51670) Tube

Reference:T1210-007001 Page:T011001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm, 1650mm, With 1-Additional Actuator Piping
FIG. Name FIG. No.
Arm, Arm and Pin T1210-003001
Arm, Additional Piping T1210-003002

Reference:X22-1039980 Page:T012000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001567
12

20 8
4
13

23
7
24
4 9
11
20 10
15
17
1 16

18 14
21 19
7 2

2
21

22 5
3

3
22

Reference:T1210-003001 Page:T012001

PC78US-8 S/N 15001-UP


Arm, Arm and Pin (#15001-)
Index Code Part Number Description Qty Serial No.
21W-973-0582 Arm Assembly 1 16824-
21W-973-0581 Arm Assembly 1 15703-16823
A2 21W-973-0580 Arm Assembly 1 15001-15702
1 C1 Arm 1 16824-
C1 Arm 1 15703-16823
C1 Arm 1 15001-15702
2 21W-70-41361 Bushing 2 15001-
3 20X-70-22140 Bushing 2 15001-
4 21W-70-51340 Bushing 2 15703-
21W-70-41621 Bushing 2 15001-15702
5 07020-00000 Fitting, Grease 1 15001-
6 07020-00900 Fitting, Grease 1 15001-
7 21W-62-44230 Hose 2 15001-
8 21W-70-44321 Pin 1 15001-
9 205-70-66580 Plate 1 15001-
10 01010-81230 Bolt 2 15001-
11 01643-31232 Washer 2 15001-
12 21Y-70-14770 Spacer, T=1.0mm 2 15001-
13 07020-00000 Fitting, Grease 1 15001-
14 22P-70-11311 Pin 1 15001-
15 205-70-66580 Plate 1 15001-
16 01010-81230 Bolt 2 15001-
17 01643-31232 Washer 2 15001-
18 22C-70-31510 Spacer, T=1.0mm 2 15001-
19 07020-00000 Fitting, Grease 1 15001-
20 07145-00060 Seal, Dust 2 15001-
21 21W-70-41430 Seal 2 15001-
22 130-09-12931 Seal 2 15001-
23 (21W-62-51660) Tube
(21W-62-51660) Tube
Reference:T1210-003001 Page:T012001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm, Arm and Pin (#15001-)
Index Code Part Number Description Qty Serial No.
(21W-62-51660) Tube
24 (21W-62-51670) Tube
(21W-62-51670) Tube
(21W-62-51670) Tube

Reference:T1210-003001 Page:T012001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001575
31

6
7 29
5

30
8
4 1
20
29 21
26
28
27
12
11 5
19 7
9 6
16
3
13
28
10
15 20 25
18
14 21
17
27
23
12
11
22 19
24 16

13
10
18 15
17 14
23

22
24

Reference:T1210-003002 Page:T012002

PC78US-8 S/N 15001-UP


Arm, Additional Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-973-4640 Hose 1 15001-
2 21W-973-4630 Hose 1 15001-
3 21W-973-4471 Tube 1 15001-
4 21W-973-4491 Tube 1 15001-
5 22B-62-19410 Clamp 2 15001-
6 01010-81270 Bolt 2 15001-
7 01643-31232 Washer 2 15001-
8 203-62-43380 Cushion 1 15001-
9 203-62-43390 Cushion 1 15001-
203-973-5803 Valve Assembly 2 15001-
10 07000-13031 O-ring 1 15001-
11 04025-00412 Pin, Spring 1 15001-
12 04064-03015 Ring, Snap, for Shaft Side 2 15001-
13 203-973-3913 Body 1 15001-
14 203-973-3923 Shaft 1 15001-
15 07000-13025 O-ring 1 15001-
16 203-973-6610 Plate 1 15001-
17 01010-80825 Bolt 1 15001-
18 01643-30823 Washer 1 15001-
19 21T-72-14930 Boss 1 15001-
20 01010-81025 Bolt 4 15001-
21 01643-31032 Washer 4 15001-
22 22B-973-2150 Elbow 2 15001-
23 07002-13334 O-ring 2 15001-
24 22B-973-2120 Plug 2 15001-
25 21W-973-4550 Nipple 1 15001-
26 21W-973-4560 Nipple 1 15001-
27 07002-13334 O-ring 2 15001-
28 02896-11012 O-ring 2 15001-
29 02896-11018 O-ring 2 15001-
Reference:T1210-003002 Page:T012002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm, Additional Piping (#15001-)
Index Code Part Number Description Qty Serial No.
30 (21W-973-5350) Tube
(21W-973-5350) Tube
(21W-973-5350) Tube
31 (21W-973-4610) Tube
(21W-973-4610) Tube
(21W-973-4610) Tube

Reference:T1210-003002 Page:T012002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm, 2250mm
FIG. Name FIG. No.
Arm, Arm and Pin T1210-006001

Reference:X22-1039710 Page:T013000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002122
33

11
34
7
8
10
9 22
13 6
12
14

17
18
15 23
30 19
16 4 21
17 20
15 1

7 16
4
30

7
25
27
26

28

24
31 29
2

2
31

32 5
3

3
32

Reference:T1210-006001 Page:T013001

PC78US-8 S/N 15001-UP


Arm, Arm and Pin (#15001-)
Index Code Part Number Description Qty Serial No.
21W-943-0212 Arm Assembly 1 15703-
A2 21W-943-0211 Arm Assembly 1 15001-15702
1 C1 Arm 1 15703-
C1 Arm 1 15001-15702
2 21W-70-41361 Bushing 2 15001-
3 20X-70-22140 Bushing 2 15001-
4 21W-70-51340 Bushing 2 15703-
21W-70-41621 Bushing 2 15001-15702
5 07020-00000 Fitting, Grease 1 15001-
6 07020-00900 Fitting, Grease 1 20798-
A2 07020-00675 Fitting, Grease 1 15001-20797
7 21W-62-44230 Hose 4 15001-
8 201-943-6121 Elbow 1 15001-
9 01010-81060 Bolt 2 15001-
10 01643-31032 Washer 2 15001-
11 56B-54-11272 Pin 2 15001-
12 21W-62-42440 Nipple 2 15001-
13 02896-11012 O-ring 2 15001-
14 07002-12034 O-ring 2 15001-
15 21W-62-42530 Elbow 2 15001-
16 02896-11012 O-ring 2 15001-
17 07002-12034 O-ring 2 15001-
18 21W-70-44321 Pin 1 15001-
19 205-70-66580 Plate 1 15001-
20 01010-81230 Bolt 2 15001-
21 01643-31232 Washer 2 15001-
22 21Y-70-14770 Spacer, T=1.0mm 2 15001-
23 07020-00000 Fitting, Grease 1 15001-
24 22P-70-11311 Pin 1 15001-
25 205-70-66580 Plate 1 15001-
Reference:T1210-006001 Page:T013001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm, Arm and Pin (#15001-)
Index Code Part Number Description Qty Serial No.
26 01010-81230 Bolt 2 15001-
27 01643-31232 Washer 2 15001-
28 22C-70-31510 Spacer, T=1.0mm 2 15001-
29 07020-00000 Fitting, Grease 1 15001-
30 07145-00060 Seal, Dust 2 15001-
31 21W-70-41430 Seal 2 15001-
32 130-09-12931 Seal 2 15001-
33 (21W-62-51660) Tube
(21W-62-51660) Tube
(21W-62-51660) Tube
34 (21W-62-51670) Tube
(21W-62-51670) Tube
(21W-62-51670) Tube

Reference:T1210-006001 Page:T013001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm, 2250mm, With 1-Additional Actuator Piping
FIG. Name FIG. No.
Arm, Arm and Pin T1210-004001
Arm, Additional Piping T1210-004002

Reference:X22-1034901 Page:T014000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002119
33

11
34
7
8
10
9 22
13
12
14
6
17 18
15 23
30 19
16 4 21
17 20

15 1

7 16
4
30

7
25
27
26

28

24
31 29
2

2
31

32 5
3

3
32

Reference:T1210-004001 Page:T014001

PC78US-8 S/N 15001-UP


Arm, Arm and Pin (#15001-)
Index Code Part Number Description Qty Serial No.
21W-973-0273 Arm Assembly 1 16824-
21W-973-0272 Arm Assembly 1 15703-16823
A2 21W-973-0271 Arm Assembly 1 15001-15702
1 C1 Arm 1 16824-
C1 Arm 1 15703-16823
C1 Arm 1 15001-15702
2 21W-70-41361 Bushing 2 15001-
3 20X-70-22140 Bushing 2 15001-
4 21W-70-51340 Bushing 2 15703-
21W-70-41621 Bushing 2 15001-15702
5 07020-00000 Fitting, Grease 1 15001-
6 07020-00900 Fitting, Grease 1 15001-
7 21W-62-44230 Hose 4 15001-
8 201-943-6121 Elbow 1 15001-
9 01010-81060 Bolt 2 15001-
10 01643-31032 Washer 2 15001-
11 56B-54-11272 Pin 2 15001-
12 21W-62-42440 Nipple 2 15001-
13 02896-11012 O-ring 2 15001-
14 07002-12034 O-ring 2 15001-
15 21W-62-42530 Elbow 2 15001-
16 02896-11012 O-ring 2 15001-
17 07002-12034 O-ring 2 15001-
18 21W-70-44321 Pin 1 15001-
19 205-70-66580 Plate 1 15001-
20 01010-81230 Bolt 2 15001-
21 01643-31232 Washer 2 15001-
22 21Y-70-14770 Spacer, T=1.0mm 2 15001-
23 07020-00000 Fitting, Grease 1 15001-
24 22P-70-11311 Pin 1 15001-
Reference:T1210-004001 Page:T014001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm, Arm and Pin (#15001-)
Index Code Part Number Description Qty Serial No.
25 205-70-66580 Plate 1 15001-
26 01010-81230 Bolt 2 15001-
27 01643-31232 Washer 2 15001-
28 22C-70-31510 Spacer, T=1.0mm 2 15001-
29 07020-00000 Fitting, Grease 1 15001-
30 07145-00060 Seal, Dust 2 15001-
31 21W-70-41430 Seal 2 15001-
32 130-09-12931 Seal 2 15001-
33 (21W-62-51660) Tube
(21W-62-51660) Tube
(21W-62-51660) Tube
(21W-62-51660) Tube
(21W-62-51660) Tube
34 (21W-62-51670) Tube
(21W-62-51670) Tube
(21W-62-51670) Tube
(21W-62-51670) Tube
(21W-62-51670) Tube

Reference:T1210-004001 Page:T014001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA002120

2
31

6
7
5
30
29

8
1

4
20 28
29 21
26
27
12 5
7
11 9 6
19
16
3
13
28
10
15 20 25
18
14 21
17
27
23
12
11
22 19
24 16

13
10
18 15
17 14
23

22
24

Reference:T1210-004002 Page:T014002

PC78US-8 S/N 15001-UP


Arm, Additional Piping (#15001-)
Index Code Part Number Description Qty Serial No.
1 02765-20415 Hose, Face Seal Type 1 15001-
2 02765-20615 Hose, Face Seal Type 1 15001-
3 21W-973-4670 Tube 1 15001-
4 21W-973-4680 Tube 1 15001-
5 22B-62-19410 Clamp 2 15001-
6 01010-81270 Bolt 2 15001-
7 01643-31232 Washer 2 15001-
8 203-62-43380 Cushion 1 15001-
9 203-62-43390 Cushion 1 15001-
203-973-5803 Valve Assembly 2 15001-
10 07000-13031 O-ring 1 15001-
11 04025-00412 Pin, Spring 1 15001-
12 04064-03015 Ring, Snap, for Shaft Side 2 15001-
13 203-973-3913 Body 1 15001-
14 203-973-3923 Shaft 1 15001-
15 07000-13025 O-ring 1 15001-
16 203-973-6610 Plate 1 15001-
17 01010-80825 Bolt 1 15001-
18 01643-30823 Washer 1 15001-
19 21T-72-14930 Boss 1 15001-
20 01010-81025 Bolt 4 15001-
21 01643-31032 Washer 4 15001-
22 22B-973-2150 Elbow 2 15001-
23 07002-13334 O-ring 2 15001-
24 22B-973-2120 Plug 2 15001-
25 21W-973-4550 Nipple 1 15001-
26 21W-973-4560 Nipple 1 15001-
27 07002-13334 O-ring 2 15001-
28 02896-11012 O-ring 2 15001-
29 02896-11018 O-ring 2 15001-
Reference:T1210-004002 Page:T014002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Arm, Additional Piping (#15001-)
Index Code Part Number Description Qty Serial No.
30 (21W-973-5350) Tube
(21W-973-5350) Tube
(21W-973-5350) Tube
31 (21W-973-4610) Tube
(21W-973-4610) Tube
(21W-973-4610) Tube

Reference:T1210-004002 Page:T014002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Bucket Cylinder
FIG. Name FIG. No.
Bucket Cylinder, Inner Parts T1220-001001

Reference:X22-1030641 Page:T015000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY010683
15
16
14
12
13
9
10
11

7 25
6 8 26
5

21 4
5
2 22

1 23

26
24 25
20
19
17
18

Reference:T1220-001001 Page:T015001

PC78US-8 S/N 15001-UP


Bucket Cylinder, Inner Parts (#15001-)
Index Code Part Number Description Qty Serial No.
707-00-0H751 Cylinder Assembly 1 15001-
1 721-11-90320 Cylinder 1 15001-
2 02896-11012 O-ring, (Kit : K06) 2 15001-
3 721-58-55180 Rod, Piston 1 15001-
4 707-76-50851 Bushing 1 15001-
5 07145-00050 Seal, Dust, (Kit : K06) 2 15001-
6 07020-00000 Fitting, Grease 1 15001-
7 707-76-60691 Bushing 1 15001-
8 21W-70-41440 Seal, Dust, (Kit : K06) 2 15001-
9 707-29-90310 Head, Cylinder 1 15001-
10 707-56-55740 Seal, Dust, (Kit : K06) 1 15001-
11 07179-12069 Ring, Snap 1 15001-
12 707-51-55211 Packing, Rod, (Kit : K06) 1 15001-
13 707-52-15310 Bushing 1 15001-
14 07000-12090 O-ring, (Kit : K06) 1 15001-
15 07000-12085 O-ring, (Kit : K06) 1 15001-
16 07146-02086 Ring, Back-up, (Kit : K06) 1 15001-
17 707-36-90240 Piston 1 15001-
18 707-44-90180 Ring, Piston, (Kit : K06) 1 15001-
19 07156-00912 Ring, Wear, (Kit : K06) 1 15001-
20 707-67-39020 Nut 1 15001-
21 707-86-46941 Tube 1 15001-
22 02896-11012 O-ring, (Kit : K06) 1 15001-
23 707-86-46950 Tube 1 15001-
24 02896-11012 O-ring, (Kit : K06) 1 15001-
25 01010-81020 Bolt 2 15001-
26 01643-31032 Washer 2 15001-

Reference:T1220-001001 Page:T015001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Bucket Linkage, Without Arm Crane
FIG. Name FIG. No.
Bucket Linkage T1230-002001

Reference:X22-0827220 Page:T016000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000477

2 20
20

21
21

1
23
22 18
6
4 19
3
6

8 13
10
11
13 17

7
5

9 7 15
14

16 12
14
24

Reference:T1230-002001 Page:T016001

PC78US-8 S/N 15001-UP


Bucket Linkage (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-70-44290 Link 1 15001-
2 21W-70-44280 Link 1 15001-
3 201-70-64110 Link 1 15001-
4 21W-70-41371 Bushing 1 15001-
5 21W-70-41381 Bushing 1 15001-
6 21W-70-41440 Seal, Dust 2 15001-
7 21W-70-41450 Seal 2 15001-
8 07020-00900 Fitting, Grease 1 15001-
9 07020-00000 Fitting, Grease 1 15001-
10 201-70-64120 Link 1 15001-
11 21W-70-41371 Bushing 1 15001-
12 21W-70-41381 Bushing 1 15001-
13 21W-70-41440 Seal, Dust 2 15001-
14 21W-70-41450 Seal 2 15001-
15 07020-00900 Fitting, Grease 1 15001-
16 07020-00000 Fitting, Grease 1 15001-
17 21W-70-42170 Pin 1 15001-
18 21W-70-42180 Pin 1 15001-
19 07020-00000 Fitting, Grease 1 15001-
20 01011-81620 Bolt 2 15001-
21 01580-11613 Nut 4 15001-
22 21Y-70-14770 Spacer, T=1.0mm 1 15001-
23 21Y-70-14780 Spacer, T=2.0mm 1 15001-
24 22C-70-31510 Spacer, T=1.0mm 1 15001-

Reference:T1230-002001 Page:T016001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Bucket Linkage, Demolition Specification
FIG. Name FIG. No.
Bucket Linkage T1230-001001

Reference:X22-0698360 Page:T017000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000478

2 20
20

21
21

1
23
22 18
6
4 19
3
6

8 13
10
11
13 17

7
5

9 7 15
14

16 12
14
24

Reference:T1230-001001 Page:T017001

PC78US-8 S/N 15001-UP


Bucket Linkage (#15001-)
Index Code Part Number Description Qty Serial No.
1 201-70-64180 Link 1 15001-
2 201-70-64170 Link 1 15001-
3 201-70-64150 Link 1 15001-
4 21W-70-41371 Bushing 1 15001-
5 21W-70-41381 Bushing 1 15001-
6 21W-70-41440 Seal, Dust 2 15001-
7 21W-70-41450 Seal 2 15001-
8 07020-00900 Fitting, Grease 1 15001-
9 07020-00000 Fitting, Grease 1 15001-
10 201-70-64160 Link 1 15001-
11 21W-70-41371 Bushing 1 15001-
12 21W-70-41381 Bushing 1 15001-
13 21W-70-41440 Seal, Dust 2 15001-
14 21W-70-41450 Seal 2 15001-
15 07020-00900 Fitting, Grease 1 15001-
16 07020-00000 Fitting, Grease 1 15001-
17 21W-70-42170 Pin 1 15001-
18 21W-70-42180 Pin 1 15001-
19 07020-00000 Fitting, Grease 1 15001-
20 01011-81620 Bolt 2 15001-
21 01580-11613 Nut 4 15001-
22 21Y-70-14770 Spacer, T=1.0mm 1 15001-
23 21Y-70-14780 Spacer, T=2.0mm 1 15001-
24 22C-70-31510 Spacer, T=1.0mm 1 15001-

Reference:T1230-001001 Page:T017001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Bucket Pin
FIG. Name FIG. No.
Bucket Pin T1235-001001

Reference:X22-0699740 Page:T018000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA005984

4
2
1

3
1

Reference:T1235-001001 Page:T018001

PC78US-8 S/N 15001-UP


Bucket Pin (#15001-)
Index Code Part Number Description Qty Serial No.
1 201-70-64210 Shaft 2 15001-
2 01011-81650 Bolt 1 15001-
3 01011-81630 Bolt 1 15001-
4 01580-11613 Nut 4 15001-

Reference:T1235-001001 Page:T018001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Bucket, 0.09m3, 483mm Width, Vertical Pin Type
FIG. Name FIG. No.
Bucket T1510-001001

Reference:X22-0698460 Page:T019000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001558
8
10
9

12
20
21 4
18 2
19
13
5 11
3
14
3

17
15
16

Reference:T1510-001001 Page:T019001

PC78US-8 S/N 15001-UP


Bucket (#15001-)
Index Code Part Number Description Qty Serial No.
21W-926-0251 Bucket Assembly 1 20790-
21W-926-0250 Bucket Assembly 1 15001-20789
1 21W-926-4110 Bucket, W=350mm 1 15001-
2 21W-926-2B30 Lip, Welded 1 15001-
3 21W-926-2A80 Plate, Welded 2 15001-
4 20X-70-23150 Adapter, Welded 3 15001-
5 21W-926-2A11 Plate, Welded 1 15001-
6 21W-926-2A21 Plate, Welded 1 15001-
7 201-926-7140 Plate, Welded 1 15001-
8 20X-70-23161 Tooth 3 15001-
9 203-70-43212 Pin 3 15001-
10 203-70-43220 Pin 3 15001-
11 201-70-74171 Side Cutter 1 15001-
12 201-70-74181 Side Cutter 1 15001-
13 21W-70-21810 Bolt 6 15001-
14 01803-02228 Nut 6 15001-
15 175-30-16210 O-ring 2 15001-
16 22C-70-31510 Spacer, T=1.0mm 2 15001-
17 20X-70-24231 Spacer 1 15001-
18 20X-70-24241 Plate 1 15001-
19 20X-70-24250 Spacer, T=0.5mm 20 15001-
20 01010-81260 Bolt 4 15001-
21 01643-31232 Washer 4 15001-

Reference:T1510-001001 Page:T019001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Bucket, 0.13m3, 583mm Width, Vertical Pin Type
FIG. Name FIG. No.
Bucket T1510-002001

Reference:X22-0698470 Page:T020000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001559
10 8

12
20 4
21 13
18
2
19

7
3

3
11
14

6 1

17
15
16

Reference:T1510-002001 Page:T020001

PC78US-8 S/N 15001-UP


Bucket (#15001-)
Index Code Part Number Description Qty Serial No.
21W-926-0261 Bucket Assembly 1 20790-
21W-926-0260 Bucket Assembly 1 15001-20789
1 21W-926-4210 Bucket, W=450mm 1 15001-
2 21W-926-2A70 Lip, Welded 1 15001-
3 21W-926-2A80 Plate, Welded 2 15001-
4 20X-70-23150 Adapter, Welded 3 15001-
5 21W-926-2A11 Plate, Welded 1 15001-
6 21W-926-2A21 Plate, Welded 1 15001-
7 201-926-7140 Plate, Welded 1 15001-
8 20X-70-23161 Tooth 3 15001-
9 203-70-43212 Pin 3 15001-
10 203-70-43220 Pin 3 15001-
11 201-70-74171 Side Cutter 1 15001-
12 201-70-74181 Side Cutter 1 15001-
13 21W-70-21810 Bolt 6 15001-
14 01803-02228 Nut 6 15001-
15 175-30-16210 O-ring 2 15001-
16 22C-70-31510 Spacer, T=1.0mm 2 15001-
17 20X-70-24231 Spacer 1 15001-
18 20X-70-24241 Plate 1 15001-
19 20X-70-24250 Spacer, T=0.5mm 20 15001-
20 01010-81260 Bolt 4 15001-
21 01643-31232 Washer 4 15001-

Reference:T1510-002001 Page:T020001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Bucket, 0.20m3, 674mm Width, Vertical Pin Type
FIG. Name FIG. No.
Bucket T1510-003001

Reference:X22-0698480 Page:T021000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000465

9 8

10
4

20 12 2
21
18 6
19

13

11
14
3

7
17 1
5
15
16

Reference:T1510-003001 Page:T021001

PC78US-8 S/N 15001-UP


Bucket (#15001-)
Index Code Part Number Description Qty Serial No.
21W-926-0211 Bucket Assembly 1 20790-
21W-926-0210 Bucket Assembly 1 15001-20789
1 21W-926-4310 Bucket, W=550mm 1 15001-
2 201-926-7320 Plate, Welded 1 15001-
3 201-926-7D50 Plate, Welded 1 15001-
4 20X-70-23150 Adapter, Welded 3 15001-
5 21W-70-24A10 Plate, Welded 1 15001-
6 21W-70-24A20 Plate, Welded 1 15001-
7 21W-70-24A30 Plate, Welded 2 15001-
8 20X-70-23161 Tooth 3 15001-
9 203-70-43212 Pin 3 15001-
10 203-70-43220 Pin 3 15001-
11 201-70-74171 Side Cutter 1 15001-
12 201-70-74181 Side Cutter 1 15001-
13 21W-70-21810 Bolt 6 15001-
14 01803-02228 Nut 6 15001-
15 175-30-16210 O-ring 2 15001-
16 22C-70-31510 Spacer, T=1.0mm 2 15001-
17 20X-70-24231 Spacer 1 15001-
18 20X-70-24241 Plate 1 15001-
19 20X-70-24250 Spacer, T=0.5mm 20 15001-
20 01010-81260 Bolt 4 15001-
21 01643-31232 Washer 4 15001-

Reference:T1510-003001 Page:T021001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Bucket, 0.28m3, 744mm Width, Horizontal Pin Type
FIG. Name FIG. No.
Bucket T1510-004001

Reference:X22-0698500 Page:T022000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000466

9
4

19 11
20 7
17
18
12

10
13
6

16
14
15 5 1

Reference:T1510-004001 Page:T022001

PC78US-8 S/N 15001-UP


Bucket (#15001-)
Index Code Part Number Description Qty Serial No.
21W-70-01381 Bucket Assembly 1 20790-
21W-70-01380 Bucket Assembly 1 15001-20789
1 21W-70-43510 Bucket, W=645mm 1 15001-
2 201-70-74161 Plate, Welded 2 15001-
3 201-70-74C50 Plate, Welded 1 15001-
4 20X-70-14151 Adapter, Welded 4 15001-
5 21W-70-24A30 Plate, Welded 2 15001-
6 21W-70-24C10 Plate, Welded 1 15001-
7 21W-70-24C20 Plate, Welded 1 15001-
8 20X-70-14160 Tooth 4 15001-
9 20X-70-14170 Pin 4 15001-
20X-70-14180 Spring 4 15001-
10 201-70-74171 Side Cutter 1 15001-
11 201-70-74181 Side Cutter 1 15001-
12 21W-70-21810 Bolt 6 15001-
13 01803-02228 Nut 6 15001-
14 175-30-16210 O-ring 2 15001-
15 22C-70-31510 Spacer, T=1.0mm 2 15001-
16 20X-70-24231 Spacer 1 15001-
17 20X-70-24241 Plate 1 15001-
18 20X-70-24250 Spacer, T=0.5mm 20 15001-
19 01010-81260 Bolt 4 15001-
20 01643-31232 Washer 4 15001-

Reference:T1510-004001 Page:T022001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Bucket, 0.28m3, 744mm Width, Vertical Pin Type, Division Adapter Type
FIG. Name FIG. No.
Bucket T1510-021001

Reference:X22-0698490 Page:T023000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
@@0D501@
9 8

10
4
2

18 12
19 6
16
17
13

11
14
5

15
20 3 1
21
7

Reference:T1510-021001 Page:T023001

PC78US-8 S/N 15001-UP


Bucket (#15001-)
Index Code Part Number Description Qty Serial No.
21W-70-01311 Bucket Assembly 1 20790-
21W-70-01310 Bucket Assembly 1 15001-20789
1 21W-70-43110 Bucket, W=650mm 1 15001-
2 201-70-74121 Plate, Welded 1 15001-
3 201-70-74161 Plate, Welded 2 15001-
4 20X-70-23150 Adapter, Welded 4 15001-
5 21W-70-24A10 Plate, Welded 1 15001-
6 21W-70-24A20 Plate, Welded 1 15001-
7 21W-70-24A30 Plate, Welded 2 15001-
8 20X-70-23161 Tooth 4 15001-
9 203-70-43212 Pin 4 15001-
10 203-70-43220 Pin 4 15001-
11 201-70-74171 Side Cutter 1 15001-
12 201-70-74181 Side Cutter 1 15001-
13 21W-70-21810 Bolt 6 15001-
14 01803-02228 Nut 6 15001-
15 20X-70-24231 Spacer 1 15001-
16 20X-70-24241 Plate 1 15001-
17 20X-70-24250 Spacer, T=0.5mm 20 15001-
18 01010-81260 Bolt 4 15001-
19 01643-31232 Washer 4 15001-
20 175-30-16210 O-ring 2 15001-
21 22C-70-31510 Spacer, T=1.0mm 2 15001-

Reference:T1510-021001 Page:T023001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Bucket, 0.28m3, 744mm Width, Vertical Pin Type, One Lip Adapter Type
FIG. Name FIG. No.
Bucket T1510-007001

Reference:X22-0827250 Page:T024000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000469

8 7

9
3

11
17 5
18
15
16
12

10
13

14
19
2 1
20

Reference:T1510-007001 Page:T024001

PC78US-8 S/N 15001-UP


Bucket (#15001-)
Index Code Part Number Description Qty Serial No.
21W-70-01611 Bucket Assembly 1 15001-
1 21W-70-44610 Bucket, W=645mm 1 15001-
2 201-70-74161 Plate, Welded 2 15001-
3 21W-70-44620 Adapter, Welded 1 15001-
4 21W-70-44B50 Plate, Welded 1 15001-
5 21W-70-44B60 Plate, Welded 1 15001-
6 21W-70-24A30 Plate, Welded 2 15001-
7 20X-70-23161 Tooth 4 15001-
8 203-70-43212 Pin 4 15001-
9 203-70-43220 Pin 4 15001-
10 201-70-74171 Side Cutter 1 15001-
11 201-70-74181 Side Cutter 1 15001-
12 21W-70-21810 Bolt 6 15001-
13 01803-02228 Nut 6 15001-
14 20X-70-24231 Spacer 1 15001-
15 20X-70-24241 Plate 1 15001-
16 20X-70-24250 Spacer, T=0.5mm 20 15001-
17 01010-81260 Bolt 4 15001-
18 01643-31232 Washer 4 15001-
19 175-30-16210 O-ring 2 15001-
20 22C-70-31510 Spacer, T=1.0mm 2 15001-

Reference:T1510-007001 Page:T024001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Bucket, 0.28m3, Reinforced 744mm Width, Horizontal Pin Type
FIG. Name FIG. No.
Bucket T1510-005001

Reference:X22-0698510 Page:T025000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000467

17 11
18 7
15
16
12

10
13
4

14
19 2 1
20 6

Reference:T1510-005001 Page:T025001

PC78US-8 S/N 15001-UP


Bucket (#15001-)
Index Code Part Number Description Qty Serial No.
21W-70-01341 Bucket Assembly 1 20790-
21W-70-01340 Bucket Assembly 1 15001-20789
1 21W-70-43410 Bucket, W=650mm 1 15001-
2 201-70-74C11 Plate, Welded 1 15001-
3 201-70-74C50 Plate, Welded 1 15001-
4 201-70-74C80 Plate, Welded 1 15001-
5 20X-70-14151 Adapter, Welded 4 15001-
6 21W-70-24C10 Plate, Welded 1 15001-
7 21W-70-24C20 Plate, Welded 1 15001-
8 20X-70-14160 Tooth 4 15001-
9 20X-70-14170 Pin 4 15001-
20X-70-14180 Spring 4 15001-
10 201-70-74171 Side Cutter 1 15001-
11 201-70-74181 Side Cutter 1 15001-
12 21W-70-21810 Bolt 6 15001-
13 01803-02228 Nut 6 15001-
14 20X-70-24231 Spacer 1 15001-
15 20X-70-24241 Plate 1 15001-
16 20X-70-24250 Spacer, T=0.5mm 20 15001-
17 01010-81260 Bolt 4 15001-
18 01643-31232 Washer 4 15001-
19 175-30-16210 O-ring 2 15001-
20 22C-70-31510 Spacer, T=1.0mm 2 15001-

Reference:T1510-005001 Page:T025001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Bucket, 0.34m3, 755mm Width, Vertical Pin Type
FIG. Name FIG. No.
Bucket T1510-006001

Reference:X22-0698520 Page:T026000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000468

9 8

10
3
5
16
17 7
14
15

13
11 4 1
12
2

Reference:T1510-006001 Page:T026001

PC78US-8 S/N 15001-UP


Bucket (#15001-)
Index Code Part Number Description Qty Serial No.
21W-920-0141 Bucket Assembly 1 20790-
21W-920-0140 Bucket Assembly 1 15001-20789
1 21W-920-4110 Bucket, W=755mm 1 15001-
2 201-70-74161 Plate, Welded 2 15001-
3 20X-70-23150 Adapter, Welded 4 15001-
4 21W-70-24A30 Plate, Welded 2 15001-
5 21W-920-2A20 Plate, Welded 1 15001-
6 21W-920-2A50 Plate, Welded 1 15001-
7 21W-920-2A60 Plate, Welded 1 15001-
8 20X-70-23161 Tooth 4 15001-
9 203-70-43212 Pin 4 15001-
10 203-70-43220 Pin 4 15001-
11 175-30-16210 O-ring 2 15001-
12 22C-70-31510 Spacer, T=1.0mm 2 15001-
13 20X-70-24231 Spacer 1 15001-
14 20X-70-24241 Plate 1 15001-
15 20X-70-24250 Spacer, T=0.5mm 20 15001-
16 01010-81260 Bolt 4 15001-
17 01643-31232 Washer 4 15001-

Reference:T1510-006001 Page:T026001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Blade, Width 2320mm
FIG. Name FIG. No.
Blade T1710-001001

Reference:X22-1039120 Page:T027000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001298
8
9
7
6

10
4
3
5
7
10 9
5 8
1
3
4 4 6
10

Reference:T1710-001001 Page:T027001

PC78US-8 S/N 15001-UP


Blade (#15001-)
Index Code Part Number Description Qty Serial No.
21W-71-00161 Blade Assembly 1 15001-
1 C1 Blade, W=2320mm 1 15001-
2 21W-71-41120 Edge 1 15001-
3 21W-70-41741 Bushing 2 15001-
4 07145-00050 Seal, Dust 4 15001-
5 07020-00675 Fitting, Grease 2 15001-
6 22P-71-11120 Pin 2 15001-
7 205-70-66580 Plate 2 15001-
8 01010-81230 Bolt 4 15001-
9 01643-31232 Washer 4 15001-
10 22C-70-31510 Spacer, T=1.0mm 8 15001-

Reference:T1710-001001 Page:T027001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Blade, Width 2320mm, With Bolt On Cutting Edge, Strengthened
FIG. Name FIG. No.
Blade, (#15001-17915) T1710-002001
Blade, (#17916-) T1710-002001A

Reference:X22-1039130 Page:T028000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001299

11
12
10 10
12
11

9 9

4
3 4
13
13
3
2
1

13
3

2
3
13
6

8
7 6

Reference:T1710-002001 Page:T028001

PC78US-8 S/N 15001-UP


Blade, (#15001-17915)
Index Code Part Number Description Qty Serial No.
21W-71-00171 Blade Assembly 1 17916-@
A2 21W-71-00170 Blade Assembly 1 15001-17915
1 C1 Blade, W=2320mm 1 15001-17915
2 21W-70-41741 Bushing 2 15001-@
3 07145-00050 Seal, Dust 4 15001-@
4 07020-00675 Fitting, Grease 2 15001-@
5 21W-71-44120 Edge 1 15001-@
6 21W-71-44131 Edge 2 17916-@
A2 21W-71-44130 Edge 2 15001-17915
7 02090-10845 Bolt 16 15001-17915
8 02290-10813 Nut 16 15001-17915
9 22P-71-11120 Pin 2 15001-@
10 205-70-66580 Plate 2 15001-@
11 01010-81230 Bolt 4 15001-@
12 01643-31232 Washer 4 15001-@
13 22C-70-31510 Spacer, T=1.0mm 8 15001-@

Reference:T1710-002001 Page:T028001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA011919

11
12
10 10
12
11

9 9

4
3 4
13
13
3
2
1

13
3

2
3
13
6

7 6 8

Reference:T1710-002001A Page:T028002

PC78US-8 S/N 15001-UP


Blade, (#17916-)
Index Code Part Number Description Qty Serial No.
21W-71-00171 Blade Assembly 1 17916-
1 C1 Blade, W=2320mm 1 17916-
2 21W-70-41741 Bushing 2 15001-
3 07145-00050 Seal, Dust 4 15001-
4 07020-00675 Fitting, Grease 2 15001-
5 21W-71-44120 Edge 1 15001-
6 21W-71-44131 Edge 2 17916-
7 02090-10845 Bolt 18 17916-
8 02290-10813 Nut 18 17916-
9 22P-71-11120 Pin 2 15001-
10 205-70-66580 Plate 2 15001-
11 01010-81230 Bolt 4 15001-
12 01643-31232 Washer 4 15001-
13 22C-70-31510 Spacer, T=1.0mm 8 15001-

Reference:T1710-002001A Page:T028002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Blade, Width 2470mm
FIG. Name FIG. No.
Blade T1710-003001

Reference:X22-1039720 Page:T029000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001556
8
9
7
6

10
4
3
5
7
10 9
5 8
1
3
4 4 6
10

Reference:T1710-003001 Page:T029001

PC78US-8 S/N 15001-UP


Blade (#15001-)
Index Code Part Number Description Qty Serial No.
21W-71-00180 Blade Assembly 1 15001-
1 C1 Blade, W=2470mm 1 15001-
2 21W-71-46120 Edge 1 15001-
3 21W-70-41741 Bushing 2 15001-
4 07145-00050 Seal, Dust 4 15001-
5 07020-00675 Fitting, Grease 2 15001-
6 22P-71-11120 Pin 2 15001-
7 205-70-66580 Plate 2 15001-
8 01010-81230 Bolt 4 15001-
9 01643-31232 Washer 4 15001-
10 22C-70-31510 Spacer, T=1.0mm 8 15001-

Reference:T1710-003001 Page:T029001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Blade Cylinder
FIG. Name FIG. No.
Blade Cylinder, Inner Parts T1720-001001
Blade Cylinder, Cover T1720-001002

Reference:X22-1035261 Page:T030000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JY011371
13
14
12
17
18
11

16
15

10

4
5
8
7
9

3 6
7

1
2

22

20

19

21

Reference:T1720-001001 Page:T030001

PC78US-8 S/N 15001-UP


Blade Cylinder, Inner Parts (#15001-)
Index Code Part Number Description Qty Serial No.
707-00-0H950 Cylinder Assembly 1 15001-
1 707-11-13620 Cylinder 1 15001-
2 02896-11009 O-ring, (Kit : K07) 1 15001-
3 02896-11012 O-ring, (Kit : K07) 1 15001-
4 707-58-65880 Rod 1 15001-
5 07020-00000 Fitting, Grease 1 15001-
6 707-76-70671 Bushing 1 15001-
7 07145-00070 Seal, Dust, (Kit : K07) 2 15001-
8 707-76-70671 Bushing 1 15001-
9 07145-00070 Seal, Dust, (Kit : K07) 2 15001-
10 07020-00675 Fitting, Grease 1 15001-
11 707-29-13240 Head, Cylinder 1 15001-
12 07000-12130 O-ring, (Kit : K07) 1 15001-
13 07000-12125 O-ring, (Kit : K07) 1 15001-
14 07146-02126 Ring, Back-up, (Kit : K07) 1 15001-
15 07179-12079 Ring, Snap 1 15001-
16 707-56-65740 Seal, Dust, (Kit : K07) 1 15001-
17 707-51-65211 Packing, Rod, (Kit : K07) 1 15001-
18 707-52-10661 Bushing 1 15001-
19 707-36-13740 Piston 1 15001-
20 07156-01315 Ring, Wear, (Kit : K07) 1 15001-
21 707-44-13180 Ring, Piston, (Kit : K07) 1 15001-
22 707-67-48020 Nut 1 15001-

Reference:T1720-001001 Page:T030001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA001615

2 9
3
9

5
6
8
7
9

4
6
8
7

Reference:T1720-001002 Page:T030002

PC78US-8 S/N 15001-UP


Blade Cylinder, Cover (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-71-41210 Cover 1 15001-
2 01010-81020 Bolt 3 15001-
3 01643-31032 Washer 3 15001-
4 22P-71-11220 Pin 1 15001-
5 21W-71-51120 Pin 1 15001-
6 205-70-66580 Plate 2 15001-
7 01010-81230 Bolt 4 15001-
8 01643-31232 Washer 4 15001-
9 21Y-70-14830 Spacer, T=1.0mm 10 15001-

Reference:T1720-001002 Page:T030002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
MARKS AND PLATES
Unit Name Unit No.
Marks and Plates, English, Text Type X22-1039871
Marks and Plates, English, USA and Puerto Rico X22-1039140
Marks and Plates, English, For EU New Noise Arrangement 2 X22-1039890
Marks and Plates, English, For EU New Noise Arrangement 2, EU Arrangement X22-1039891
Marks and Plates, English, For EU New Noise Arrangement 2, EU Arrangement, EU Safety Regulation X22-1039892
Marks and Plates, Turkish-English, For EU New Noise Arrangement 2, EU Arrangement X22-1096020
Marks and Plates, Turkish-English, For EU New Noise Arrangement 2, EU Arrangement, EU Safety Regulation X22-1096021
Marks and Plates, Spanish X22-1039880
Lifting Capacity Chart X22-1039730
Lifting Capacity Chart, Long Arm, For EU X22-1039740
Lifting Capacity Chart, For EU X22-1039750
Lifting Capacity Chart, With Overload Alarm, For EU Safety Regulation, Lifting Capacity Chart, EU Arrangement X22-1039751
Lifting Capacity Chart, Turkish, With Overload Alarm X22-1096050
Lifting Capacity Chart, Turkish X22-1096060
Lifting Capacity Chart, For EU Safety Regulation, Lifting Capacity Chart, EU Arrangement X22-1096061
Caution Plates, KOMTRAX, KOMTRAX X22-1175510
FOPS Plate, Top Guard, English X21-1171950
FOPS Plate, Front Guard, English X21-1171960
FOPS Plate, Top and Front Guard, English X21-1171970
ROPS Plate, English X21-2072690
ROPS Plate, Spanish-English, USA X21-2072740
Rivet X21-2072780
Accumulator Plate X22-0755040

Reference: Page:U000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, English, Text Type
FIG. Name FIG. No.
Marks and Plates, (1/2) U0100-021001
Marks and Plates, (2/2) U0100-021002

Reference:X22-1039871 Page:U001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008570
9 4 2 6 3 5 4 9

7 1

Reference:U0100-021001 Page:U001001

PC78US-8 S/N 15001-UP


Marks and Plates, (1/2) (#15001-)
Index Code Part Number Description Qty Serial No.
1 09690-M0063 Plate, Komatsu Logo 1 15001-16823
2 09690-P0800 Plate, Komatsu Logo 1 15001-
3 21W-00-51110 Mark, Machine Model 1 15001-
4 09690-P0800 Plate, Komatsu Logo 2 15001-
5 09690-P0450 Plate, Komatsu Logo 1 15001-
6 09133-23000 Plate, Danger, Keep Off Swing Area 1 15001-
7 C2 (09601-10001) Plate, Name (Limited Supply) 1 15001-
8 04418-13060 Screw 4 15001-
9 09134-A0881 Plate, Danger, Keep Off Working Area 2 15001-

Reference:U0100-021001 Page:U001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA021300

24 25 7 31
13
19

18

13
26
29
5 12 11 9 11 12 6 12 11 9 11 12

16 2 22

1 30
20 10

28 14
23

27 21 17 15 4

33
8 32

Reference:U0100-021002 Page:U001002

PC78US-8 S/N 15001-UP


Marks and Plates, (2/2) (#15001-)
Index Code Part Number Description Qty Serial No.
1 22U-00-21290 Plate, Warning 1 15001-
2 21W-00-51121 Plate, Oil Chart 1 15001-
3 21W-98-41720 Plate, Air Cleaner Replace 1 15001-
4 22B-00-11420 Plate, Swing Boom Operation And Swing Brake Release 1 15001-
5 09653-03001 Plate, Warning, High Temperature 1 15001-
6 09667-03001 Plate, Caution, Rotating Object 1 15001-
7 09669-0000E Plate, Symbol, Fuel Filler 1 15001-
8 09808-03000 Plate, Warning, Battery Cables 1 15001-
9 09657-03003 Plate, Warning, Track Adjustment 2 15001-
10 09963-03001 Tag, Danger, Do Not Operate 1 15001-
11 09960-00801 Mark, Lift Point 4 15001-
12 09960-00802 Mark, Tie Down Point 4 15001-
13 21U-98-31160 Plate, Mark, Location Of Center Of Gravity 2 15001-
14 21W-00-51130 Plate, Read Manual, Lifting Posture 1 15001-
15 22B-00-21231 Decal, Fuse Box 1 15001-
16 09664-30112 Plate, Danger, Battery 2 15001-
17 22P-00-11440 Sheet 1 15001-
18 20U-98-31320 Plate, Oil Level 1 15001-
19 11Y-98-31130 Plate, Symbol, Ecot3 1 15001-
20 22B-00-11340 Plate, Symbol, Window Washer 1 15001-
21 09669-0000A Plate, Symbol, Coolant Filler 1 15001-
22 20Y-00-K2380 Plate 1 15001-
23 09659-53000 Plate, Warning, Explosion Hazard 1 15001-
24 22U-00-21510 Plate, Notice, Socket 1 15001-
25 09668-03001 Plate, Warning, Hot Water 1 15001-
26 14X-98-35181 Plate, Reflector 2 15001-
27 09642-13000 Plate, Notice, KOMATSU Genuine Engine Coolant 1 15001-
28 22P-00-11142 Plate, Friction Noise Brake 1 15001-
29 22P-00-11151 Plate, Friction Noise Brake 1 15001-
30 20U-98-21910 Plate, Warning, Window Repaired Immediately 1 15001-
Reference:U0100-021002 Page:U001002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, (2/2) (#15001-)
Index Code Part Number Description Qty Serial No.
31 20Y-00-11350 Plate 1 15001-
32 09803-03000 Plate, Warning, Window Lock 1 15001-
33 22P-00-11380 Plate, Front Lower Window Lock 1 15001-

Reference:U0100-021002 Page:U001002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, English, USA and Puerto Rico
FIG. Name FIG. No.
Marks and Plates, (1/2) U0100-002001
Marks and Plates, (2/2) U0100-002002

Reference:X22-1039140 Page:U002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008570
9 4 2 6 3 5 4 9

7 1

Reference:U0100-002001 Page:U002001

PC78US-8 S/N 15001-UP


Marks and Plates, (1/2) (#15001-)
Index Code Part Number Description Qty Serial No.
1 09690-M0063 Plate, Komatsu Logo 1 15001-16823
2 09690-P0800 Plate, Komatsu Logo 1 15001-
3 21W-00-51110 Mark, Machine Model 1 15001-
4 09690-P0800 Plate, Komatsu Logo 2 15001-
5 09690-P0450 Plate, Komatsu Logo 1 15001-
6 09133-23000 Plate, Danger, Keep Off Swing Area 1 15001-
7 C2 (09601-15000) Plate, Name (Limited Supply) 1 21126-
C2 (09601-10001) Plate, Name (Limited Supply) 1 15001-21125
8 04418-13060 Screw 4 15001-
9 09134-A0881 Plate, Danger, Keep Off Working Area 2 15001-

Reference:U0100-002001 Page:U002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008571

24 25 7 31
13
19

18

13
26
29
5 12 11 9 11 12 6 12 11 9 11 12

16 2 22

1 30
20 10

28 14
23

27 21 17 15 4

33
8 32

Reference:U0100-002002 Page:U002002

PC78US-8 S/N 15001-UP


Marks and Plates, (2/2) (#15001-)
Index Code Part Number Description Qty Serial No.
1 22U-00-21290 Plate, Warning 1 15001-
2 21W-00-51121 Plate, Oil Chart 1 15001-
3 21W-98-41720 Plate, Air Cleaner Replace 1 15001-
4 22B-00-11420 Plate, Swing Boom Operation And Swing Brake Release 1 15001-
5 09653-03001 Plate, Warning, High Temperature 1 15001-
6 09667-03001 Plate, Caution, Rotating Object 1 15001-
7 09652-31251 Plate, Caution, Diesel Fuel 1 17930-
09652-31231 Plate, Caution, Diesel Fuel 1 15001-17929
8 09808-03000 Plate, Warning, Battery Cables 1 15001-
9 09657-03003 Plate, Warning, Track Adjustment 2 15001-
10 09963-03001 Tag, Danger, Do Not Operate 1 15001-
11 09960-00801 Mark, Lift Point 4 15001-
12 09960-00802 Mark, Tie Down Point 4 15001-
13 21U-98-31160 Plate, Mark, Location Of Center Of Gravity 2 15001-
14 21W-00-51130 Plate, Read Manual, Lifting Posture 1 15001-
15 22B-00-21231 Decal, Fuse Box 1 15001-
16 09664-30013 Plate, Danger, Battery 2 21126-
09664-30011 Plate, Danger, Battery 2 15001-21125
17 22P-00-11440 Sheet 1 15449-
A2 22P-00-11211 Sheet 1 15001-15448
18 20U-98-31320 Plate, Oil Level 1 15001-
19 11Y-98-31130 Plate, Symbol, Ecot3 1 15001-
20 22B-00-11340 Plate, Symbol, Window Washer 1 15001-
21 09669-0000A Plate, Symbol, Coolant Filler 1 15001-
22 20Y-00-K2380 Plate 1 15001-
23 09659-53000 Plate, Warning, Explosion Hazard 1 15001-
24 22U-00-21510 Plate, Notice, Socket 1 15001-
25 09668-03001 Plate, Warning, Hot Water 1 15001-
26 14X-98-35181 Plate, Reflector 2 15001-
27 09642-13000 Plate, Notice, KOMATSU Genuine Engine Coolant 1 15001-
Reference:U0100-002002 Page:U002002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, (2/2) (#15001-)
Index Code Part Number Description Qty Serial No.
28 22P-00-11142 Plate, Friction Noise Brake 1 15769-
A2 22P-00-11141 Plate, Friction Noise Brake 1 15001-15768
29 22P-00-11151 Plate, Friction Noise Brake 1 15769-
22P-00-11150 Plate, Friction Noise Brake 1 15001-15768
30 20U-98-21910 Plate, Warning, Window Repaired Immediately 1 15001-
31 20Y-00-11350 Plate, Painting Protector 1 15769-
32 09803-03000 Plate, Warning, Window Lock 1 15001-
33 22P-00-11380 Plate, Front Lower Window Lock 1 15001-

Reference:U0100-002002 Page:U002002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, English, For EU New Noise Arrangement 2
FIG. Name FIG. No.
Marks and Plates, (1/2) U0100-003001
Marks and Plates, (2/2) U0100-003002

Reference:X22-1039890 Page:U003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008573
10 4 2 7 3 6 5 4 10

8 1

Reference:U0100-003001 Page:U003001

PC78US-8 S/N 15001-UP


Marks and Plates, (1/2) (#15001-15239)
Index Code Part Number Description Qty Serial No.
1 09690-M0063 Plate, Komatsu Logo 1 15001-15239
2 09690-P0800 Plate, Komatsu Logo 1 15001-15239
3 21W-00-51110 Mark, Machine Model 1 15001-15239
4 09690-P0800 Plate, Komatsu Logo 2 15001-15239
5 09690-P0450 Plate, Komatsu Logo 1 15001-15239
6 21S-98-2A110 Mark, Utility 1 15001-15239
7 09133-A1681 Plate, Danger, Keep Off Swing Area 1 15001-15239
8 C2 (09601-00001) Plate, Name (Limited Supply) 1 15001-15239
9 04418-13060 Screw 4 15001-15239
10 09134-A0881 Plate, Danger, Keep Off Working Area 2 15001-15239

Reference:U0100-003001 Page:U003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008574

32 5 6 7
13
20
26
19

36 13
25

12 11 9 11 12 29 29 12 11 9 11 12

28
10 2 23 1

27

16
17 37
21 35

31 14
24

30 22 18 15 4

34
8 33

Reference:U0100-003002 Page:U003002

PC78US-8 S/N 15001-UP


Marks and Plates, (2/2) (#15001-15239)
Index Code Part Number Description Qty Serial No.
1 22P-00-11271 Plate, Alarm Assemble Plate 1 15001-15239
2 21W-00-51121 Plate, Oil Chart 1 15001-15239
3 20E-00-K1120 Plate, Service Instruction, Air Cleaner 1 15001-15239
4 206-00-K1010 Plate, Emergency Pump Drive and Swing Parking Brake Cancel 1 15001-15239
5 09653-A0481 Plate, Warning, High Temperature 1 15001-15239
6 09667-A0481 Plate, Caution, Rotating Object 1 15001-15239
7 09669-0000E Plate, Symbol, Fuel Filler 1 15001-15239
8 09808-A0881 Plate, Warning, Battery Cables 1 15001-15239
9 09657-A0881 Plate, Warning, Track Adjustment 2 15001-15239
10 09963-A1640 Tag, Danger, Do Not Operate 1 15001-15239
11 09960-00801 Mark, Lift Point 4 15001-15239
12 09960-00802 Mark, Tie Down Point 4 15001-15239
13 21U-98-31160 Plate, Mark, Location Of Center Of Gravity 2 15001-15239
14 21W-00-51130 Plate, Read Manual, Lifting Posture 1 15001-15239
15 21W-00-51190 Decal, Fuse Box 1 15001-15239
16 09664-60000 Plate, Danger, Battery 2 15001-15239
17 21S-98-33250 Decal, Operating Pattern 1 15001-15239
18 22P-00-11211 Sheet 1 15001-15239
19 20U-98-31320 Plate, Oil Level 1 15001-15239
20 11Y-98-31130 Plate, Symbol, Ecot3 1 15001-15239
21 22B-00-11340 Plate, Symbol, Window Washer 1 15001-15239
22 09669-0000A Plate, Symbol, Coolant Filler 1 15001-15239
23 20Y-00-K2380 Plate 1 15001-15239
24 09659-A057B Plate, Warning, Explosion Hazard, Gas Spring 1 15001-15239
25 20E-00-K1710 Plate, Quality Assurance Mark 1 15001-15239
26 20E-00-K1690 Plate, Antifreeze 1 15001-15239
27 09653-A0481 Plate, Warning, High Temperature 1 15001-15239
28 09659-A057B Plate, Warning, Explosion Hazard, Gas Spring 2 15001-15239
29 14X-98-35181 Plate, Reflector 2 15001-15239
30 09642-13000 Plate, Notice, KOMATSU Genuine Engine Coolant 1 15001-15239
Reference:U0100-003002 Page:U003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, (2/2) (#15001-15239)
Index Code Part Number Description Qty Serial No.
31 22P-00-11141 Plate, Friction Noise Brake 1 15001-15239
32 22P-00-11150 Plate, Friction Noise Brake 1 15001-15239
33 22P-00-11170 Plate, Warning, Window Lock 1 15001-15239
34 22P-00-11380 Plate, Front Lower Window Lock 1 15001-15239
35 09696-50071 Plate, Noise Level, for EU 1 15001-15239
36 09696-40098 Plate, Noise Level, for EU 1 15001-15239
37 22M-98-12110 Decal, Danger, Keep Off Swing Area 1 15001-15239

Reference:U0100-003002 Page:U003002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, English, For EU New Noise Arrangement 2, EU Arrangement
FIG. Name FIG. No.
Marks and Plates, (1/2) U0100-005001
Marks and Plates, (2/2) U0100-005002

Reference:X22-1039891 Page:U004000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008573
10 4 2 7 3 6 5 4 10

8 1

Reference:U0100-005001 Page:U004001

PC78US-8 S/N 15001-UP


Marks and Plates, (1/2) (#15240-15746)
Index Code Part Number Description Qty Serial No.
1 09690-M0063 Plate, Komatsu Logo 1 15240-15746
2 09690-P0800 Plate, Komatsu Logo 1 15240-15746
3 21W-00-51110 Mark, Machine Model 1 15240-15746
4 09690-P0800 Plate, Komatsu Logo 2 15240-15746
5 09690-P0450 Plate, Komatsu Logo 1 15240-15746
6 21S-98-2A110 Mark, Utility 1 15240-15746
7 09133-A1681 Plate, Danger, Keep Off Swing Area 1 15240-15746
8 C2 (09601-00001) Plate, Name (Limited Supply) 1 15240-15746
9 04418-13060 Screw 4 15240-15746
10 09134-A0881 Plate, Danger, Keep Off Working Area 2 15240-15746

Reference:U0100-005001 Page:U004001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008575

32 5 6 7
13
20
26
19

36 13
25

12 11 9 11 12 29 29 12 11 9 11 12

38
10 28
2 23 1
27

16
17 37
21 35

31 14
24

30 22 18 15 4

34
8 33

Reference:U0100-005002 Page:U004002

PC78US-8 S/N 15001-UP


Marks and Plates, (2/2) (#15240-15746)
Index Code Part Number Description Qty Serial No.
1 22P-00-11271 Plate, Alarm Assemble Plate 1 15240-15746
2 21W-00-51121 Plate, Oil Chart 1 15240-15746
3 20E-00-K1120 Plate, Service Instruction, Air Cleaner 1 15240-15746
4 206-00-K1010 Plate, Emergency Pump Drive and Swing Parking Brake Cancel 1 15240-15746
5 09653-A0481 Plate, Warning, High Temperature 1 15240-15746
6 09667-A0481 Plate, Caution, Rotating Object 1 15240-15746
7 09669-0000E Plate, Symbol, Fuel Filler 1 15240-15746
8 09808-A0881 Plate, Warning, Battery Cables 1 15240-15746
9 09657-A0881 Plate, Warning, Track Adjustment 2 15240-15746
10 09963-A1640 Tag, Danger, Do Not Operate 1 15240-15746
11 09960-00801 Mark, Lift Point 4 15240-15746
12 09960-00802 Mark, Tie Down Point 4 15240-15746
13 21U-98-31160 Plate, Mark, Location Of Center Of Gravity 2 15240-15746
14 21W-00-51130 Plate, Read Manual, Lifting Posture 1 15240-15746
15 21W-00-51190 Decal, Fuse Box 1 15240-15746
16 09664-60000 Plate, Danger, Battery 2 15240-15746
17 21S-98-33250 Decal, Operating Pattern 1 15240-15746
18 22P-00-11440 Sheet 1 15449-15746
A2 22P-00-11211 Sheet 1 15240-15448
19 20U-98-31320 Plate, Oil Level 1 15240-15746
20 11Y-98-31130 Plate, Symbol, Ecot3 1 15240-15746
21 22B-00-11340 Plate, Symbol, Window Washer 1 15240-15746
22 09669-0000A Plate, Symbol, Coolant Filler 1 15240-15746
23 20Y-00-K2380 Plate 1 15240-15746
24 09659-A057B Plate, Warning, Explosion Hazard 1 15240-15746
25 20E-00-K1710 Plate, Quality Assurance Mark 1 15240-15746
26 20E-00-K1690 Plate, Antifreeze 1 15240-15746
27 09653-A0481 Plate, Warning, High Temperature 1 15240-15746
28 09659-A057B Plate, Warning, Explosion Hazard 2 15240-15746
29 14X-98-35181 Plate, Reflector 2 15240-15746
Reference:U0100-005002 Page:U004002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, (2/2) (#15240-15746)
Index Code Part Number Description Qty Serial No.
30 09642-13000 Plate, Notice, KOMATSU Genuine Engine Coolant 1 15240-15746
31 22P-00-11141 Plate, Friction Noise Brake 1 15240-15746
32 22P-00-11150 Plate, Friction Noise Brake 1 15240-15746
33 22P-00-11170 Plate, Warning, Window Lock 1 15240-15746
34 22P-00-11380 Plate, Front Lower Window Lock 1 15240-15746
35 09696-50071 Plate, Noise Level, for EU 1 15240-15746
36 09696-40098 Plate, Noise Level, for EU 1 15240-15746
37 22M-98-12110 Decal, Danger, Keep Off Swing Area 1 15240-15746
38 09697-00001 Plate, Battery Disconnect Switch 1 15240-15746

Reference:U0100-005002 Page:U004002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, English, For EU New Noise Arrangement 2, EU Arrangement, EU Safety Regulation
FIG. Name FIG. No.
Marks and Plates, (1/2) U0100-016001
Marks and Plates, (2/2) (#15747-17929) U0100-016002
Marks and Plates, (2/2) (#17930-) U0100-016002A

Reference:X22-1039892 Page:U005000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008573
10 4 2 7 3 6 5 4 10

8 1

Reference:U0100-016001 Page:U005001

PC78US-8 S/N 15001-UP


Marks and Plates, (1/2) (#15747-)
Index Code Part Number Description Qty Serial No.
1 09690-M0063 Plate, Komatsu Logo 1 15747-16823
2 09690-P0800 Plate, Komatsu Logo 1 15747-
3 21W-00-51110 Mark, Machine Model 1 15747-
4 09690-P0800 Plate, Komatsu Logo 2 15747-
5 09690-P0450 Plate, Komatsu Logo 1 15747-
6 21S-98-2A110 Mark, Utility 1 15747-
7 09133-A1681 Plate, Danger, Keep Off Swing Area 1 15747-
8 C2 (09601-00003) Plate, Name (Limited Supply) 1 15747-
9 04418-13060 Screw 4 15747-
10 09134-A0881 Plate, Danger, Keep Off Working Area 2 15747-

Reference:U0100-016001 Page:U005001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008576
39

7
30
13 6
20

19

35 13

24

12 11 9 11 12 27 27 12 11 9 11 12
37
10 26
2 1
25

31
16
17 36
21 34

29 14
23

28 22 18 15 4

38 3

33
8 32

Reference:U0100-016002 Page:U005002

PC78US-8 S/N 15001-UP


Marks and Plates, (2/2) (#15747-17929)
Index Code Part Number Description Qty Serial No.
1 22P-00-11272 Plate, Alarm Assemble Plate 1 16029-@
A2 22P-00-11271 Plate, Alarm Assemble Plate 1 15747-16028
2 21W-00-51121 Plate, Oil Chart 1 15747-@
3 09637-A0480 Plate, Service Instruction, Air Cleaner 1 15747-@
4 206-00-K1010 Plate, Emergency Pump Drive and Swing Parking Brake Cancel 1 15747-@
5 09653-A0481 Plate, Warning, High Temperature 1 15747-@
6 09667-A0481 Plate, Caution, Rotating Object 1 15747-@
7 09669-0000E Plate, Symbol, Fuel Filler 1 15747-17929
8 09808-A0881 Plate, Warning, Battery Cables 1 15747-@
9 09657-A0881 Plate, Warning, Track Adjustment 2 15747-@
10 09963-A1640 Tag, Danger, Do Not Operate 1 15747-@
11 09960-00801 Mark, Lift Point 4 15747-@
12 09960-00802 Mark, Tie Down Point 4 15747-@
13 21U-98-31160 Plate, Mark, Location Of Center Of Gravity 2 15747-@
14 21W-00-51350 Plate, Read Manual, Lifting Posture 1 17328-@
21W-00-51130 Plate, Read Manual, Lifting Posture 1 15747-17327
15 21W-00-51191 Plate 1 15747-@
16 09664-60011 Plate, Danger, Battery 2 15766-@
09664-60000 Plate, Danger, Battery 2 15747-15765
17 09822-A0750 Plate, Warning, Lever Control Pattern 1 15747-@
18 22P-00-11440 Sheet 1 15747-@
19 20U-98-31320 Plate, Oil Level 1 15747-@
20 11Y-98-31130 Plate, Symbol, Ecot3 1 15747-@
21 22B-00-11340 Plate, Symbol, Window Washer 1 15747-@
22 09669-0000A Plate, Symbol, Coolant Filler 1 15747-@
23 09659-A057B Plate, Warning, Explosion Hazard 1 15747-@
24 20E-00-K1710 Plate, Quality Assurance Mark 1 15747-@
25 09653-A0481 Plate, Warning, High Temperature 1 15747-@
26 09659-A057B Plate, Warning, Explosion Hazard 2 15747-@
27 14X-98-35181 Plate, Reflector 2 15747-@
Reference:U0100-016002 Page:U005002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, (2/2) (#15747-17929)
Index Code Part Number Description Qty Serial No.
28 09642-A0480 Plate, Notice, Coolant 1 15747-@
29 22P-00-11142 Plate, Friction Noise Brake 1 15747-@
30 22P-00-11151 Plate, Friction Noise Brake 1 15747-@
31 20Y-00-11350 Plate, Painting Protector 1 15747-@
32 22P-00-11170 Plate, Warning, Window Lock 1 15747-@
33 22P-00-11381 Plate, Lock For Lower Window 1 15747-@
34 09696-50071 Plate, Noise Level, for EU 1 15747-@
35 09696-40098 Plate, Noise Level, for EU 1 15747-@
36 09802-A0480 Plate, Warning, Before Operating and Traveling 1 15747-@
37 09697-00001 Plate, Battery Disconnect Switch 1 15747-@
38 600-181-1940 Plate, Caution, Air Cleaner 1 15747-@
39 23B-53-71190 Plate, Caution, Radiator Cap 1 15747-@

Reference:U0100-016002 Page:U005002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA011916
40

5
8

7
31
14 6
21

20

36 14

25

13 12 10 12 13 28 28 13 12 10 12 13
38
11 27
2 1
26

32
17

18 37
22 35

30 15
24

29 23 19 16 4

39 3

34
9 33

Reference:U0100-016002A Page:U005003

PC78US-8 S/N 15001-UP


Marks and Plates, (2/2) (#17930-)
Index Code Part Number Description Qty Serial No.
1 22P-00-11272 Plate, Alarm Assemble Plate 1 16029-
2 21W-00-51121 Plate, Oil Chart 1 15747-
3 09637-A0480 Plate, Service Instruction, Air Cleaner 1 15747-
4 206-00-K1010 Plate, Emergency Pump Drive and Swing Parking Brake Cancel 1 15747-
5 09653-A0481 Plate, Warning, High Temperature 1 15747-
6 09667-A0481 Plate, Caution, Rotating Object 1 15747-
7 09652-31251 Plate, Caution, Diesel Fuel 1 17930-
8 09652-61251 Plate, Caution, Diesel Fuel 1 17930-
9 09808-A0881 Plate, Warning, Battery Cables 1 15747-
10 09657-A0881 Plate, Warning, Track Adjustment 2 15747-
11 09963-A1640 Tag, Danger, Do Not Operate 1 15747-
12 09960-00801 Mark, Lift Point 4 15747-
13 09960-00802 Mark, Tie Down Point 4 15747-
14 21U-98-31160 Plate, Mark, Location Of Center Of Gravity 2 15747-
15 21W-00-51350 Plate, Read Manual, Lifting Posture 1 17328-
16 21W-00-51191 Plate 1 15747-
17 09664-69A11 Plate, Danger, Battery 2 18106-
09664-60011 Plate, Danger, Battery 2 15766-18105
18 09822-A0750 Plate, Warning, Lever Control Pattern 1 15747-
19 22P-00-11440 Sheet 1 15747-
20 20U-98-31320 Plate, Oil Level 1 15747-
21 11Y-98-31130 Plate, Symbol, Ecot3 1 15747-
22 22B-00-11340 Plate, Symbol, Window Washer 1 15747-
23 09669-0000A Plate, Symbol, Coolant Filler 1 15747-
24 09659-A057B Plate, Warning, Explosion Hazard 1 15747-
25 20E-00-K1710 Plate, Quality Assurance Mark 1 15747-
26 09653-A0481 Plate, Warning, High Temperature 1 15747-
27 09659-A057B Plate, Warning, Explosion Hazard 2 15747-
28 14X-98-35181 Plate, Reflector 2 15747-
29 09642-A0480 Plate, Notice, Coolant 1 15747-
Reference:U0100-016002A Page:U005003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, (2/2) (#17930-)
Index Code Part Number Description Qty Serial No.
30 22P-00-11142 Plate, Friction Noise Brake 1 15747-
31 22P-00-11151 Plate, Friction Noise Brake 1 15747-
32 20Y-00-11350 Plate, Painting Protector 1 15747-
33 22P-00-11170 Plate, Warning, Window Lock 1 15747-
34 22P-00-11381 Plate, Lock For Lower Window 1 15747-
35 09696-50071 Plate, Noise Level, for EU 1 15747-
36 09696-40098 Plate, Noise Level, for EU 1 15747-
37 09802-A0480 Plate, Warning, Before Operating and Traveling 1 15747-
38 09697-00001 Plate, Battery Disconnect Switch 1 15747-
39 600-181-1940 Plate, Caution, Air Cleaner 1 15747-
40 23B-53-71190 Plate, Caution, Radiator Cap 1 15747-

Reference:U0100-016002A Page:U005003
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, Turkish-English, For EU New Noise Arrangement 2, EU Arrangement
FIG. Name FIG. No.
Marks and Plates, (1/2) U0100-011001
Marks and Plates, (2/2) U0100-011002

Reference:X22-1096020 Page:U006000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008573
10 4 2 7 3 6 5 4 10

8 1

Reference:U0100-011001 Page:U006001

PC78US-8 S/N 15001-UP


Marks and Plates, (1/2) (#15506-15866)
Index Code Part Number Description Qty Serial No.
1 09690-M0063 Plate, Komatsu Logo 1 15506-15866
2 09690-P0800 Plate, Komatsu Logo 1 15506-15866
3 21W-00-51110 Mark, Machine Model 1 15506-15866
4 09690-P0800 Plate, Komatsu Logo 2 15506-15866
5 09690-P0450 Plate, Komatsu Logo 1 15506-15866
6 21S-98-2A110 Mark, Utility 1 15506-15866
7 09133-A1681 Plate, Danger, Keep Off Swing Area 1 15506-15866
8 C2 (09601-00001) Plate, Name (Limited Supply) 1 15506-15866
9 04418-13060 Screw 4 15506-15866
10 09134-A0881 Plate, Danger, Keep Off Working Area 2 15506-15866

Reference:U0100-011001 Page:U006001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008578

31 5 6 7 32
13
20
25
19

36 13
24

12 11 9 11 12 28 28 12 11 9 11 12

38
10 27
2 1
26

16
17 37
21 35

30 14
23

29 22 18 15 4

34
8 33

Reference:U0100-011002 Page:U006002

PC78US-8 S/N 15001-UP


Marks and Plates, (2/2) (#15506-15866)
Index Code Part Number Description Qty Serial No.
1 22P-00-11271 Plate, Alarm Assemble Plate 1 15506-15866
2 21W-00-51121 Plate, Oil Chart 1 15506-15866
3 20E-00-K1120 Plate, Service Instruction, Air Cleaner 1 15506-15866
4 206-00-K1010 Plate, Emergency Pump Drive and Swing Parking Brake Cancel 1 15506-15866
5 09653-A0481 Plate, Warning, High Temperature 1 15506-15866
6 09667-A0481 Plate, Caution, Rotating Object 1 15506-15866
7 09669-0000E Plate, Symbol, Fuel Filler 1 15506-15866
8 09808-A0881 Plate, Warning, Battery Cables 1 15506-15866
9 09657-A0881 Plate, Warning, Track Adjustment 2 15506-15866
10 09963-A1640 Tag, Danger, Do Not Operate 1 15506-15866
11 09960-00801 Mark, Lift Point 4 15506-15866
12 09960-00802 Mark, Tie Down Point 4 15506-15866
13 21U-98-31160 Plate, Mark, Location Of Center Of Gravity 2 15506-15866
14 21W-00-51130 Plate, Read Manual, Lifting Posture 1 15506-15866
15 22B-00-21470 Decal, Fuse Box 1 15506-15866
16 09664-60000 Plate, Danger, Battery 2 15506-15866
17 21S-98-33250 Decal, Operating Pattern 1 15506-15866
18 22P-00-11440 Sheet 1 15506-15866
19 20U-98-31320 Plate, Oil Level 1 15506-15866
20 11Y-98-31130 Plate, Symbol, Ecot3 1 15506-15866
21 22B-00-11340 Plate, Symbol, Window Washer 1 15506-15866
22 09669-0000A Plate, Symbol, Coolant Filler 1 15506-15866
23 09659-A057B Plate, Warning, Explosion Hazard 1 15506-15866
24 20E-00-K1710 Plate, Quality Assurance Mark 1 15506-15866
25 20E-00-K1690 Plate, Antifreeze 1 15506-15866
26 09653-A0481 Plate, Warning, High Temperature 1 15506-15866
27 09659-A057B Plate, Warning, Explosion Hazard 2 15506-15866
28 14X-98-35181 Plate, Reflector 2 15506-15866
29 09642-11100 Plate, Notice, KOMATSU Genuine Engine Coolant 1 15506-15866
30 22P-00-11142 Plate, Friction Noise Brake 1 15769-15866
Reference:U0100-011002 Page:U006002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, (2/2) (#15506-15866)
Index Code Part Number Description Qty Serial No.
30 A2 22P-00-11141 Plate, Friction Noise Brake 1 15506-15768
31 22P-00-11151 Plate, Friction Noise Brake 1 15769-15866
22P-00-11150 Plate, Friction Noise Brake 1 15506-15768
32 20Y-00-11350 Plate, Painting Protector 1 15769-15866
33 22P-00-11170 Plate, Warning, Window Lock 1 15506-15866
34 21W-00-51270 Plate, Front Lower Window Lock 1 15506-15866
35 09696-50071 Plate, Noise Level, for EU 1 15506-15866
36 09696-40098 Plate, Noise Level, for EU 1 15506-15866
37 22M-98-12110 Decal, Danger, Keep Off Swing Area 1 15506-15866
38 09697-00001 Plate, Battery Disconnect Switch 1 15506-15866

Reference:U0100-011002 Page:U006002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, Turkish-English, For EU New Noise Arrangement 2, EU Arrangement, EU Safety Regulation
FIG. Name FIG. No.
Marks and Plates, (1/2) U0100-017001
Marks and Plates, (2/2) U0100-017002

Reference:X22-1096021 Page:U007000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008573
10 4 2 7 3 6 5 4 10

8 1

Reference:U0100-017001 Page:U007001

PC78US-8 S/N 15001-UP


Marks and Plates, (1/2) (#15867-)
Index Code Part Number Description Qty Serial No.
1 09690-M0063 Plate, Komatsu Logo 1 15867-16823
2 09690-P0800 Plate, Komatsu Logo 1 15867-
3 21W-00-51110 Mark, Machine Model 1 15867-
4 09690-P0800 Plate, Komatsu Logo 2 15867-
5 09690-P0450 Plate, Komatsu Logo 1 15867-
6 21S-98-2A110 Mark, Utility 1 15867-
7 09133-A1681 Plate, Danger, Keep Off Swing Area 1 15867-
8 C2 (09601-00003) Plate, Name (Limited Supply) 1 15867-
9 04418-13060 Screw 4 15867-
10 09134-A0881 Plate, Danger, Keep Off Working Area 2 15867-

Reference:U0100-017001 Page:U007001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008576
39

7
30
13 6
20

19

35 13

24

12 11 9 11 12 27 27 12 11 9 11 12
37
10 26
2 1
25

31
16
17 36
21 34

29 14
23

28 22 18 15 4

38 3

33
8 32

Reference:U0100-017002 Page:U007002

PC78US-8 S/N 15001-UP


Marks and Plates, (2/2) (#15867-)
Index Code Part Number Description Qty Serial No.
1 22P-00-11272 Plate, Alarm Assemble Plate 1 16029-
A2 22P-00-11271 Plate, Alarm Assemble Plate 1 15867-16028
2 21W-00-51121 Plate, Oil Chart 1 15867-
3 09637-A0480 Plate, Service Instruction, Air Cleaner 1 15867-
4 206-00-K1010 Plate, Emergency Pump Drive and Swing Parking Brake Cancel 1 15867-
5 09653-A0481 Plate, Warning, High Temperature 1 15867-
6 09667-A0481 Plate, Caution, Rotating Object 1 15867-
7 09669-0000E Plate, Symbol, Fuel Filler 1 15867-
8 09808-A0881 Plate, Warning, Battery Cables 1 15867-
9 09657-A0881 Plate, Warning, Track Adjustment 2 15867-
10 09963-A1640 Tag, Danger, Do Not Operate 1 15867-
11 09960-00801 Mark, Lift Point 4 15867-
12 09960-00802 Mark, Tie Down Point 4 15867-
13 21U-98-31160 Plate, Mark, Location Of Center Of Gravity 2 15867-
14 21W-00-51130 Plate, Read Manual, Lifting Posture 1 15867-
15 22B-00-21471 Plate, Fuse Box 1 15867-
16 09664-60011 Plate, Danger, Battery 2 15867-
17 09822-A0750 Plate, Warning, Lever Control Pattern 1 15867-
18 22P-00-11440 Sheet 1 15867-
19 20U-98-31320 Plate, Oil Level 1 15867-
20 11Y-98-31130 Plate, Symbol, Ecot3 1 15867-
21 22B-00-11340 Plate, Symbol, Window Washer 1 15867-
22 09669-0000A Plate, Symbol, Coolant Filler 1 15867-
23 09659-A057B Plate, Warning, Explosion Hazard 1 15867-
24 20E-00-K1710 Plate, Quality Assurance Mark 1 15867-
25 09653-A0481 Plate, Warning, High Temperature 1 15867-
26 09659-A057B Plate, Warning, Explosion Hazard 2 15867-
27 14X-98-35181 Plate, Reflector 2 15867-
28 09642-A0480 Plate, Notice, Coolant 1 15867-
29 22P-00-11142 Plate, Friction Noise Brake 1 15867-
Reference:U0100-017002 Page:U007002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, (2/2) (#15867-)
Index Code Part Number Description Qty Serial No.
30 22P-00-11151 Plate, Friction Noise Brake 1 15867-
31 20Y-00-11350 Plate, Painting Protector 1 15867-
32 22P-00-11170 Plate, Warning, Window Lock 1 15867-
33 22P-00-11381 Plate, Lock For Lower Window 1 15867-
34 09696-50071 Plate, Noise Level, for EU 1 15867-
35 09696-40098 Plate, Noise Level, for EU 1 15867-
36 09802-A0480 Plate, Warning, Before Operating and Traveling 1 15867-
37 09697-00001 Plate, Battery Disconnect Switch 1 15867-
38 600-181-1940 Plate, Caution, Air Cleaner 1 15867-
39 23B-53-71190 Plate, Caution, Radiator Cap 1 15867-

Reference:U0100-017002 Page:U007002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, Spanish
FIG. Name FIG. No.
Marks and Plates, (1/2) U0100-004001
Marks and Plates, (2/2) U0100-004002

Reference:X22-1039880 Page:U008000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008570
9 4 2 6 3 5 4 9

7 1

Reference:U0100-004001 Page:U008001

PC78US-8 S/N 15001-UP


Marks and Plates, (1/2) (#15001-)
Index Code Part Number Description Qty Serial No.
1 09690-M0063 Plate, Komatsu Logo 1 15001-16823
2 09690-P0800 Plate, Komatsu Logo 1 15001-
3 21W-00-51110 Mark, Machine Model 1 15001-
4 09690-P0800 Plate, Komatsu Logo 2 15001-
5 09690-P0450 Plate, Komatsu Logo 1 15001-
6 09133-21001 Plate, Danger, Keep Off Swing Area 1 15001-
7 C2 (09601-10001) Plate, Name (Limited Supply) 1 15001-
8 04418-13060 Screw 4 15001-
9 09134-A0881 Plate, Danger, Keep Off Working Area 2 15001-

Reference:U0100-004001 Page:U008001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008572

24 25 7 31
13
20

19

13
26
29
5 12 11 9 11 12 6 26 12 11 9 11 12

17 16 2

1 30
21 10

28 14
23

27 22 18 15 4

33
8 32

Reference:U0100-004002 Page:U008002

PC78US-8 S/N 15001-UP


Marks and Plates, (2/2) (#15001-)
Index Code Part Number Description Qty Serial No.
1 22B-00-11850 Plate 1 15001-
2 21W-00-51120 Plate, Oil Chart 1 15001-
3 21W-98-41940 Plate 1 15001-
4 22B-00-11760 Plate, Swing Parking Brake Function Switch, Emergency Pump Drive 1 15001-
Switch
5 09653-01001 Plate, Warning, High Temperature 1 15001-
6 09667-01001 Plate, Caution, Rotating Object 1 15001-
7 09669-0000E Plate, Symbol, Fuel Filler 1 15001-
8 09808-01000 Plate, Warning, Battery Cables 1 15001-
9 09657-01004 Plate, Warning, Track Adjustment 2 15001-
10 09963-01001 Tag, Danger, Do Not Operate 1 15001-
11 09960-00801 Mark, Lift Point 4 15001-
12 09960-00802 Mark, Tie Down Point 4 15001-
13 21U-98-31160 Plate, Mark, Location Of Center Of Gravity 2 15001-
14 21W-00-51130 Plate, Read Manual, Lifting Posture 1 15001-
15 21W-00-51310 Decal, Fuse Box 1 15001-
16 09664-30011 Plate, Danger, Battery 2 15001-
17 21W-98-41970 Decal, Danger, Battery 1 15001-
18 22P-00-11440 Sheet 1 15449-
A2 22P-00-11211 Sheet 1 15001-15448
19 20U-98-31320 Plate, Oil Level 1 15001-
20 11Y-98-31130 Plate, Symbol, Ecot3 1 15001-
21 22B-00-11340 Plate, Symbol, Window Washer 1 15001-
22 09669-0000A Plate, Symbol, Coolant Filler 1 15001-
23 09659-51000 Plate, Warning, Explosion Hazard 1 15001-
24 22U-00-21510 Plate, Notice, Socket 1 15001-
25 09668-01001 Plate, Warning, Hot Water 1 15001-
26 14X-98-35181 Plate, Reflector 2 15001-
27 09642-11000 Plate, Service Instruction, Engine Coolant AF-NAC 1 15001-
28 22P-00-11142 Plate, Friction Noise Brake 1 15769-
Reference:U0100-004002 Page:U008002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Marks and Plates, (2/2) (#15001-)
Index Code Part Number Description Qty Serial No.
28 A2 22P-00-11141 Plate, Friction Noise Brake 1 15001-15768
29 22P-00-11151 Plate, Friction Noise Brake 1 15769-
22P-00-11150 Plate, Friction Noise Brake 1 15001-15768
30 22B-00-11770 Decal, Warning, Working Of Repair When Window 1 15001-
31 20Y-00-11350 Plate, Painting Protector 1 15769-
32 09803-01000 Plate, Warning, Window Lock 1 15001-
33 21W-00-51320 Plate, Front Lower Window Lock 1 15001-

Reference:U0100-004002 Page:U008002
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Lifting Capacity Chart
FIG. Name FIG. No.
Lifting Capacity Chart U0200-001001

Reference:X22-1039730 Page:U009000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008579

Reference:U0200-001001 Page:U009001

PC78US-8 S/N 15001-UP


Lifting Capacity Chart (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-00-51230 Decal, Lifting Capacity Table 1 15001-

Reference:U0200-001001 Page:U009001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Lifting Capacity Chart, Long Arm, For EU
FIG. Name FIG. No.
Lifting Capacity Chart U0200-002001

Reference:X22-1039740 Page:U010000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008579

Reference:U0200-002001 Page:U010001

PC78US-8 S/N 15001-UP


Lifting Capacity Chart (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-00-51240 Decal, Lifting Capacity Table 1 15001-

Reference:U0200-002001 Page:U010001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Lifting Capacity Chart, For EU
FIG. Name FIG. No.
Lifting Capacity Chart U0200-003001

Reference:X22-1039750 Page:U011000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008580

1 2

Reference:U0200-003001 Page:U011001

PC78US-8 S/N 15001-UP


Lifting Capacity Chart (#15001-15749)
Index Code Part Number Description Qty Serial No.
1 21W-00-51210 Decal, Lifting Capacity Table 1 15001-15749
2 21W-00-51220 Decal, Lifting Capacity Table, Overlade Caution 1 15001-15749

Reference:U0200-003001 Page:U011001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Lifting Capacity Chart, With Overload Alarm, For EU Safety Regulation, Lifting Capacity Chart, EU Arrangement
FIG. Name FIG. No.
Lifting Capacity Chart U0200-007001

Reference:X22-1039751 Page:U012000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008580

1 2

Reference:U0200-007001 Page:U012001

PC78US-8 S/N 15001-UP


Lifting Capacity Chart (#15750-)
Index Code Part Number Description Qty Serial No.
1 21W-00-51211 Plate 1 15750-
2 21W-00-51220 Decal, Lifting Capacity Table, Overlade Caution 1 15750-

Reference:U0200-007001 Page:U012001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Lifting Capacity Chart, Turkish, With Overload Alarm
FIG. Name FIG. No.
Lifting Capacity Chart U0200-005001

Reference:X22-1096050 Page:U013000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008581

1 2

Reference:U0200-005001 Page:U013001

PC78US-8 S/N 15001-UP


Lifting Capacity Chart (#15506-)
Index Code Part Number Description Qty Serial No.
1 21W-00-51280 Decal, Lifting Capacity Table 1 15506-
2 21W-00-51220 Decal, Lifting Capacity Table, Overlade Caution 1 15506-

Reference:U0200-005001 Page:U013001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Lifting Capacity Chart, Turkish
FIG. Name FIG. No.
Lifting Capacity Chart U0200-006001

Reference:X22-1096060 Page:U014000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008582

Reference:U0200-006001 Page:U014001

PC78US-8 S/N 15001-UP


Lifting Capacity Chart (#15506-15749)
Index Code Part Number Description Qty Serial No.
1 21W-00-51280 Decal, Lifting Capacity Table 1 15506-15749

Reference:U0200-006001 Page:U014001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Lifting Capacity Chart, For EU Safety Regulation, Lifting Capacity Chart, EU Arrangement
FIG. Name FIG. No.
Lifting Capacity Chart U0200-008001

Reference:X22-1096061 Page:U015000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008582

Reference:U0200-008001 Page:U015001

PC78US-8 S/N 15001-UP


Lifting Capacity Chart (#15750-)
Index Code Part Number Description Qty Serial No.
1 21W-00-51211 Plate 1 15750-

Reference:U0200-008001 Page:U015001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Caution Plates, KOMTRAX, KOMTRAX
FIG. Name FIG. No.
Caution Plates, KOMTRAX U0205-001001

Reference:X22-1175510 Page:U016000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA008583

Reference:U0205-001001 Page:U016001

PC78US-8 S/N 15001-UP


Caution Plates, KOMTRAX (#15001-)
Index Code Part Number Description Qty Serial No.
1 09845-00480 Plate, Caution, Blast Site 1 15001-

Reference:U0205-001001 Page:U016001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
FOPS Plate, Top Guard, English
FIG. Name FIG. No.
FOPS Plate U0520-001001

Reference:X21-1171950 Page:U017000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA004716

1
3

Reference:U0520-001001 Page:U017001

PC78US-8 S/N 15001-UP


FOPS Plate (#15001-)
Index Code Part Number Description Qty Serial No.
1 C2 (09620-D2001) Plate, Name, Top Guard (Limited Supply) 1 27607-
C2 (09620-D2000) Plate, Name, Top Guard (Limited Supply) 1 15001-27606
2 09620-D2171 Plate, Warning, Top and Front Guard 1 27607-
3 04418-13060 Screw 4 15001-

Reference:U0520-001001 Page:U017001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
FOPS Plate, Front Guard, English
FIG. Name FIG. No.
FOPS Plate U0520-002001

Reference:X21-1171960 Page:U018000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA004715

Reference:U0520-002001 Page:U018001

PC78US-8 S/N 15001-UP


FOPS Plate (#15001-)
Index Code Part Number Description Qty Serial No.
1 C2 (09620-E2001) Plate, Name, Front Guard (Limited Supply) 1 27607-
C2 (09620-E2000) Plate, Name, Front Guard (Limited Supply) 1 15001-27606
2 09620-D2171 Plate, Warning, Top and Front Guard 1 27607-
3 04418-13060 Screw 4 15001-

Reference:U0520-002001 Page:U018001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
FOPS Plate, Top and Front Guard, English
FIG. Name FIG. No.
FOPS Plate U0520-003001

Reference:X21-1171970 Page:U019000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA021227

5 1
3

6
2
4

Reference:U0520-003001 Page:U019001

PC78US-8 S/N 15001-UP


FOPS Plate (#15001-)
Index Code Part Number Description Qty Serial No.
1 C2 (09620-D2001) Plate, Name, Top Guard (Limited Supply) 1 27607-
C2 (09620-D2000) Plate, Name, Top Guard (Limited Supply) 1 15001-27606
2 09620-D2171 Plate, Warning, Top and Front Guard 1 27607-
3 04418-13060 Screw 4 15001-
4 C2 (09620-E2001) Plate, Name, Front Guard (Limited Supply) 1 27607-
C2 (09620-E2000) Plate, Name, Front Guard (Limited Supply) 1 15001-27606
5 09620-D2171 Plate, Warning, Top and Front Guard 1 27607-
6 04418-13060 Screw 4 15001-

Reference:U0520-003001 Page:U019001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
ROPS Plate, English
FIG. Name FIG. No.
ROPS Plate U0521-002001

Reference:X21-2072690 Page:U020000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA005980

2
1

Reference:U0521-002001 Page:U020001

PC78US-8 S/N 15001-UP


ROPS Plate (#15001-)
Index Code Part Number Description Qty Serial No.
1 C2 (09620-J2000) Plate, Certification Mark, ROPS For H/E, Limited Supply 1 15001-
2 205-00-72430 Rivet 4 15001-

Reference:U0521-002001 Page:U020001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
ROPS Plate, Spanish-English, USA
FIG. Name FIG. No.
ROPS Plate U0521-004001

Reference:X21-2072740 Page:U021000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA005981

Reference:U0521-004001 Page:U021001

PC78US-8 S/N 15001-UP


ROPS Plate (#15001-)
Index Code Part Number Description Qty Serial No.
1 C2 (09620-T2001) Plate, Name, ROPS (Limited Supply) 1 26884-
C2 (09620-J2000) Plate, Certification Mark, ROPS For H/E, Limited Supply 1 15001-26887
2 09620-B2071 Plate, Warning, ROPS 1 26884-
A2 09620-B2070 Plate, Warning, ROPS 1 15001-26883
3 205-00-72430 Rivet 4 15001-

Reference:U0521-004001 Page:U021001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Rivet
FIG. Name FIG. No.
Rivet U0521-005001

Reference:X21-2072780 Page:U022000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA005983

Reference:U0521-005001 Page:U022001

PC78US-8 S/N 15001-UP


Rivet (#15001-)
Index Code Part Number Description Qty Serial No.
1 205-00-72430 Rivet 4 15001-

Reference:U0521-005001 Page:U022001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Accumulator Plate
FIG. Name FIG. No.
Accumulator Plate U0580-001001

Reference:X22-0755040 Page:U023000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JD014130
1

Reference:U0580-001001 Page:U023001

PC78US-8 S/N 15001-UP


Accumulator Plate (#15001-)
Index Code Part Number Description Qty Serial No.
1 09659-A057B Plate, Warning, Explosion Hazard 1 15001-

Reference:U0580-001001 Page:U023001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
AUXILIARY PARTS AND TOOL
Unit Name Unit No.
Spare Parts X22-1037390
Cap and Overall X22-0075410
General Tool Set X22-1037400

Reference: Page:V000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Spare Parts
FIG. Name FIG. No.
Spare Parts V0100-002001

Reference:X22-1037390 Page:V001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000474
1 2 3 4

5 6 7 8

9 10 11 12

13

Reference:V0100-002001 Page:V001001

PC78US-8 S/N 15001-UP


Spare Parts (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-60-41121 Element 1 15001-
2 07000-12135 O-ring 1 15001-
3 600-211-2111 Cartridge 1 20224-
A1 600-211-2110 Cartridge 1 15001-20223
4 6204-11-8810 O-ring 1 15001-
5 6136-11-8142 Packing 3 15001-
6 6205-61-3500 V-belt, 1270mm 1 15001-
7 07005-02216 Seal, Washer 1 15001-
8 600-319-3870 Cartridge 1 16833-
A2 600-319-3530 Cartridge 1 15001-16832
9 600-319-4110 Cartridge Assembly 1 15001-
600-311-3630 Seal 1 15001-
10 07020-00000 Fitting, Grease 4 15001-
11 07020-00900 Fitting, Grease 4 15001-
12 07020-00675 Fitting, Grease 4 15001-
13 07002-12434 O-ring 1 15001-

Reference:V0100-002001 Page:V001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Cap and Overall
FIG. Name FIG. No.
Cap and Overall V0200-001001

Reference:X22-0075410 Page:V002000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000475

1 2

Reference:V0200-001001 Page:V002001

PC78US-8 S/N 15001-UP


Cap and Overall (#15001-)
Index Code Part Number Description Qty Serial No.
1 09980-91550 Overall 1 15001-
2 09982-10057 Cap 1 15001-

Reference:V0200-001001 Page:V002001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
General Tool Set
FIG. Name FIG. No.
General Tool Set V0300-001001

Reference:X22-1037400 Page:V003000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
JA000476
1 2 3 4

5 7 8 9

10 11 12 13

Reference:V0300-001001 Page:V003001

PC78US-8 S/N 15001-UP


General Tool Set (#15001-)
Index Code Part Number Description Qty Serial No.
1 21W-98-41390 Tool Bag 1 15001-
2 09002-01214 Wrench, W=12X14mm 1 15001-
3 09002-01317 Wrench, W=13X17mm 1 15001-
4 09002-02427 Wrench, W=24X27mm 1 15001-
5 07950-10450 Grease Pump 1 15001-
6 07951-41017 Nozzle 1 15001-
7 07950-90403 Cartridge, Grease 1 15001-
8 09007-00836 Wrench, W=8mm 1 15001-
9 09019-28036 Wrench, Filter 1 15001-
10 09021-01928 Socket, W=19mm 1 15001-
11 09021-02436 Socket, W=24mm 1 15001-
12 09023-00300 Handle 1 15001-
13 09021-01016 Socket, W=10mm 1 15001-

Reference:V0300-001001 Page:V003001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
FIELD REPAIR SERVICE PARTS
Unit Name Unit No.
Service Kit Parts Y99-0000002

Reference: Page:Y000000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Service Kit Parts
FIG. Name FIG. No.
Service Kit Parts KIT

Reference:Y99-0000002 Page:Y001000
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Service Kit Parts
Index Code Part Number Description Qty Serial No.
K01 TZ119D9000-00 Service Kit, Travel Motor 15001-
07000-05230 O-ring 1 -
07000-11007 O-ring 2 -
07000-12014 O-ring 3 -
07000-12018 O-ring 2 -
07002-12034 O-ring 1 -
TZ192-230-30BA Floating Seal Assembly 1 -
TZ266B2035-00 O-ring 1 -
TZ266B2039-00 O-ring 1 -
TZJB2401-P26-9 O-ring 2 -
TZJW1516-G37-7 O-ring 1 -
TZTCZ-30-50-9 Seal, Oil 1 -
K02 21W-32-05060 Service Kit, Shoe Bolt and Nut 15001-
11Y-32-11220 Nut 50 -
22P-32-11210 Bolt 50 -
K03 21W-32-05040 Service Kit, Shoe Bolt and Nut 15001-
11Y-32-11220 Nut 50 -
A2 201-32-51211 Bolt 50 -
K04 707-98-36700 Service Kit, Boom Cylinder 15001-
02896-11012 O-ring 3 -
02896-11015 O-ring 1 -
07000-12110 O-ring 2 -
07000-12115 O-ring 1 -
07145-00060 Seal, Dust 2 -
07145-00065 Seal, Dust 2 -
707-35-91610 Ring, Back-up 2 -
707-35-91630 Ring, Back-up 1 -
707-39-11510 Ring, Wear 1 -
707-44-11281 Ring, Piston 1 -
707-51-65211 Packing, Rod 1 -
707-56-65740 Seal, Dust 1 -
K05 707-98-35310 Service Kit, Arm Cylinder 15001-
02896-11012 O-ring 2 -
02896-11015 O-ring 1 -
07000-12095 O-ring 2 -
07000-12100 O-ring 1 -
07145-00055 Seal, Dust 2 -
07145-00060 Seal, Dust 2 -
07146-02096 Ring, Back-up 2 -
07156-01012 Ring, Wear 1 -
707-35-91050 Ring, Back-up 1 -
707-44-10180 Ring, Piston 1 -
707-51-60211 Packing, Rod 1 -
707-56-60740 Seal, Dust 1 -
K06 707-98-26720 Service Kit, Bucket Cylinder 15001-
02896-11012 O-ring 4 -
07000-12085 O-ring 1 -
07000-12090 O-ring 1 -
07145-00050 Seal, Dust 2 -
07146-02086 Ring, Back-up 1 -
07156-00912 Ring, Wear 1 -
21W-70-41440 Seal, Dust 2 -
707-44-90181 Ring, Piston 1 -
707-51-55211 Packing, Rod 1 -
707-56-55740 Seal, Dust 1 -
K07 707-98-42700 Service Kit, Blade Cylinder 15001-
02896-11009 O-ring 1 -
02896-11012 O-ring 1 -
07000-12125 O-ring 1 -
07000-12130 O-ring 1 -
07145-00070 Seal, Dust 4 -
07146-02126 Ring, Back-up 1 -
07156-01315 Ring, Wear 1 -
707-44-13180 Ring, Piston 1 -
707-51-65211 Packing, Rod 1 -
707-56-65740 Seal, Dust 1 -
K08 21W-32-05050 Shoe Bolt and Nut Kit 15001-
Reference:KIT Page:Y001001
www.komatsupartsbook.com
PC78US-8 S/N 15001-UP
Service Kit Parts
Index Code Part Number Description Qty Serial No.
11Y-32-11220 Nut 50 -
201-32-51240 Bolt 50 -

Reference:KIT Page:Y001001

You might also like