Parts Manual: Marine Generator Set
Parts Manual: Marine Generator Set
MDKBP (Spec D)
MDKBR (Spec D)
MDKBV (Spec A)
Service and repair of Onan equipment must be performed by trained, experienced personnel only. Im-
proper service or repair may result in property damage, severe personal injury or death. Do not use this
catalog as a guide to servicing your equipment. Read and follow the IMPORTANT SAFETY IN-
STRUCTIONS in the Service Manual appropriate for the equipment you are working on.
Contact with USED ENGINE OILS has been identified by a United States federal agency and some USA
state agencies as causing CANCER or REPRODUCTIVE TOXICITY. When checking or changing engine
oils take all necessary precautions not to ingest, breathe the fumes or contact the used oil.
Contact with ASBESTOS has been identified by a United States federal agency and some USA state
agencies as causing CANCER or REPRODUCTIVE TOXICITY. When handling engine gaskets take all
necessary precautions not to ingest, breathe or contact the dust from the gaskets! Use adequate ven-
tilation and wear protective gloves, masks and clothing!
Contact with BENZINE and LEAD, found in gasoline, fuel additives and solvents has been identified
by a United States federal agency and some USA state agencies as causing CANCER or REPRODUC-
TIVE TOXICITY. When checking, draining or adding gasoline and fuel additives or using solvents take
all necessary precautions not to ingest, breathe the fumes or contact the liquids. Use adequate ventila-
tion and wear protective gloves, masks and protective clothing!
Servicing and replacement of MARINE CRITICAL PARTS must be carried out by persons trained and
experienced with marine gasoline engine−generator safety requirements!
PSP-1
Introduction
This catalog applies to the standard marine generator sets listed below. Parts are arranged in groups of related items
and each illustrated part is identified by a reference number corresponding to the same reference number in the parts
list. Parts illustrations are typical. Unless otherwise mentioned in the description or page heading, parts are inter-
changeable between models. Throughout this catalog left and right sides are determined by facing the engine end
(front) of the set.
MODEL HERTZ
MDKBP/* 50/60
MDKBR/* 50/60
MDKBV/* 50/60
* − The diagonal line (/) in the model and specification number separates generator
set characteristics from the specification number and letter. The specification
number denotes customer requested options or deviations from the standard
model. The specification letter advances (A to B, B to C, etc.) with major
manufacturing changes.
WIRING DIAGRAM
630−2694 DC
1
Index
2
Index
3
Index
4
Index
5
Cylinder Block, MDKBP
9
20
9 12 5
18 13 2
21
19
10
16 3
17
28 11
1 2 8
2
6
29
3
7
23 2
26
10
4
25
15
4 14
27 22
24
MDKBP/R/V
6
Cylinder Block MDKBR and MDKBV
9 7
9 5
20 14 12
17 2
18
19 13
10 3
1 2
11
2
27
6
8
28 3
22 7
24 2
25
10
26
21 16
4 15 4
23
REF PART QTY PART REF PART QTY PART
NO. NO. USED DESCRIPTION NO. NO. USED DESCRIPTION
MDKBP/R/V
7
Piston
3
4 4
5 7
MDKBP/R/V
8
Crankshaft
4
1
3
2
12
6
13
11 13
5
7
10 9
8
14
MDKBP/R/V
9
Camshaft
13
8
9
10
11
12
2
4
1
3 6
4
7
5
MDKBP/R/V
10
Flywheel
12
14
13
3 10
8
7 6
2 9
4
5
11
10
1 104−2134 Flywheel Assy (Includes Ring 9 Starter (See Separate Page For
Gear) Components)
2 101−0811 1 Plug, Hole 191−1959 1 12V
3 101−0821 1 Adapter, Engine 191−1550 1 24V
4 526−0145 6 Washer, Flat (M12) 10 526−2140 4 Washer, Flat (M12)
5 800−3032 6 Screw, Hex Head Cap 11 800−2113 2 Screw, Hex Head Cap
(M12 x 1.25 x 30mm) (M12 x 1.75 x 35mm)
6 526−0399−62 11 Washer, Flat (M10) 12 403−7060−02 1 Bracket, Engine Lifting
7 800−3005 11 Screw, Hex Head Cap 13 800−2056 1 Screw, Hex Head Cap
(M10 x 1.25 x 30mm) (M8 x 1.25 x 16mm)
8 800−3033 2 Screw, Hex Head 14 526−2100 1 Washer, Flat (M8)
(M21 x 1.25 x 25mm)
MDKBP/R/V
11
Main Bearing Housing
7 9
5
4
8
2
3
12
2
3
11
13
2
3
10
13
13
MDKBP/R/V
12
Fuel Camshaft
11
12
13
1 2
4
10
2
6
5
10 14
3 15
MDKBP/R/V
13
Speed Control
14
10
6 7
9
10
12 13
11
4
1
2
MDKBP/R/V
14
Governor
10
5
3
1 2 4
9
7
7
6
8
MDKBP/R/V
15
Idle
7 5
3
1
2
4
MDKBP/R/V
16
Injection Pump Components
8
9
10
1
10
6
6
9
2
4
10
MDKBP/R/V
17
Cylinder Head
8 6
7
10
11
3
3
2
7
1
1
5
REF PART QTY PART REF PART QTY PART
NO. NO. USED DESCRIPTION NO. NO. USED DESCRIPTION
MDKBP/R/V
18
Rocker Arm
15
13
8 17
9
17
10 16
17 14
11
17
9
17
17
10
18 10 9
17
17 19
7
5
4
14
16 3
9
12 6
13
15
MDKBP/R/V
19
Nozzle Holder and Glow Plug
7 8
14
6
15 12
11
10
9
1
13
5
2
16
3
MDKBP/R/V
20
Water Outlet Flange
15
13
18 1
3
17 14
16
2 3
10
12
11
9
8
7
5
MDKBP/R/V
21
Cylinder Head Cover
8 5
1 4
8
6
3 7
2
10
5
11
12
MDKBP/R/V
22
Gearcase
10 18
16
17
6 5
21 6
20
19
23 3
22
14
15
13
4
8
12
11
1
2
9 2
9 12
REF PART QTY PART REF PART QTY PART
NO. NO. USED DESCRIPTION NO. NO. USED DESCRIPTION
MDKBP/R/V
23
Oil Pan
15
16
17
10
14
8
2
9
1
5
3
4
13 12
11
6
REF PART QTY PART REF PART QTY PART
NO. NO. USED DESCRIPTION NO. NO. USED DESCRIPTION
MDKBP/R/V
24
Oil Filter Assembly
1
2
MDKBP/R/V
25
Water Pump MDKBP
4
2 5
1
6 9
2
11
12
3
6
8
10
10
14
13
MDKBP/R/V
26
Water Pump MDKBR, MDKBV
2 4
5
1 6
9
13
2
11
12
3
6
13
8
10
15 10
14
MDKBP/R/V
27
Alternator
(Negative Ground)
5
6
2 8
4 9
MDKBP/R/V
28
Alternator Components
(Negative Ground)
(12V)
11
9 13 10
12 6
7
22
5
17 27
24
2 4 18 23
20
3 19
25
15
22
21
8 28
16 2
1
28
26
14
MDKBP/R/V
29
Alternator Components
(Negative Ground)
(24V)
2
1 11 10
9 27
6
8 7
12 21
5 23
9
12 17
2
4 18 19
3
21
22 14
20
24
27
15
16
26
25
13
MDKBP/R/V
30
Alternator
(Isolated Ground)
(12V/24V)
6
7
5
10
14
8
3
9
4
11
2
13
12
MDKBP/R/V
31
Governor Actuator
4
1
3 2
1 Actuator, Governor
306−5316−01 1 12V
306−5316−02 1 24V
2 725−1027 2 Screw, Socket Head Cap (M6 x 16mm)
3 526−0063 2 Washer, Copper (1/32”)
4 150−2918 1 Gasket, Solenoid Cover
MDKBP/R/V
32
Fuel System
6
16 4
22 23
17
21
4
20
23
23
18 23
15
8 12
2 28
29 4 8
6 9
23
5
4 24
4
10 1, 30 13
3 14
26
27 25
4 7 10
11
19
23
23
MDKBP/R/V
33
Fuel Transfer Lines
11
4
Rear Bulkhead
6
5
3
2 1
1
5
4
Front Bulkhead 10
8 7
9 11
MDKBP/R/V
34
Remote Water Separator
2
4 3
MDKBP/R/V
35
Water Separator Components
7
6
3
8
MDKBP/R/V
36
Water Inlet
MDKBP/R/V
37
Break Siphon
MDKBP/R/V
38
“Blank Page”
MDKBP/R/V
39
Heat Exchanger
13, 21
2
3 10
1
21,19
28 21,17
12
18
21,17
19,21
15 21,17
16
14
20
4
11 21,19
13, 21
21,17
6
19,21
7
8
9
26
25
5
24 22
23 27
MDKBP/R/V
40
Heat Exchanger
MDKBP/R/V
41
Keel Cooling
3
2
4
25 10
7
22
11
10
9
10 12
5 21
20
13 9
19
9
16
23
9 15
10
16 14
15
17
15
18
MDKBP/R/V
42
Keel Cooling
MDKBP/R/V
43
Water Pump Components
5 13
6
3 ,4 2
7
9
10
11
12
9
9
MDKBP/R/V
44
Keel Cooling System (Dry Exhaust)
9 2
1
3
2 7
1 6
3 9
8
6
5
4
155−3087 1 Kit, Keel Cooling (Includes Parts 7 503−2079 1 *Hose, Coolant (1” x 10”)
Marked *) 8 505−0041 1 *Elbow
155−3284 1 Kit, Exhaust 9 503−1137 2 Clamp, Hose (1”)
1 503−1138 6 Clamp, Hose (1−3/8”)
2 503−2023 2 *Hose, Coolant (1−3/8” x 4”)
3 505−0446−01 2 *Nipple, Half
4 505−0003 1 *Elbow * − Parts Included in Keel Cooling Kit. (Also Includes Cover,
5 505−0304 1 Tee Gasket and Hardware Found on Cylinder Block Page.)
6 505−0759 3 *Barb, Hose
MDKBP/R/V
45
Coolant Tank
3
4
6
8
9
MDKBP/R/V
46
Coolant Recovery
130−3574 1 Kit, Coolant Recovery 3 503−1692 1 Hose (5/16 I.D. x 120” Lg.)
(Instructions Included) 4 130−3572 1 Cap, Tank
1 130−3570 1 Tank, Coolant Recovery 5 130−3573 1 Hardware Package (Includes
2 130−3571 1 Hanger, Tank Mounting Hardware)
MDKBP/R/V
47
PTO
1
2 3 4
7 8
9
10
4 5
6
11
19
20 12
11 12
12 22 14 13
21 15
16
17
15
18
14
13
MDKBP/R/V
48
Intake Manifold
5
11
7
9
10
11
6
2
1
3
REF PART QTY PART REF PART QTY PART
NO. NO. USED DESCRIPTION NO. NO. USED DESCRIPTION
MDKBP/R/V
49
Bulkhead Exhaust
7 8
3,4
6
3,4
1
Front Out
7
3,4
2
3,4 1
8
Rear Out
MDKBP/R/V
50
Exhaust Manifold
5
6
MDKBP/R/V
51
Wet Exhaust
2 4 6
3
2
7
9
10
14
11
13
12
17 14
15
MDKBP/R/V
52
Dry Exhaust
(Up or Down)
10
7 3
6
4 1
2
9
4
7
11
15 6
12
5
13
14
10
MDKBP/R/V
53
Muffler
MDKBP/R/V
54
Water Separator, Muffler
2
2
2
2
5
1
2
3
MDKBP/R/V
55
Isolated Ground
10
11
2
4
3
8 5
9
9 7
7
MDKBP/R/V
56
Mounting Base
7 8
5
7 59
5
5
9
6
2 6
5
3
4
MDKBP/R/V
57
Grounding System
7
1 8 6
10
2 7 7 1
5
6
3 11 3
4
4
MDKBP/R/V
58
Belt Guard and PTO Belt Guard
10
2
3 5, 6 10
7, 11
1
10
4
8
10
10 W/O PTO
10
9
PTO
MDKBP/R/V
59
Generator Housing
23
12 7 10 2
11 22
12 12
1
9
12
8 17
25 24 14
16
5
13
184
12
12 3
12
1920 15
21
MDKBP/R/V
60
Engine Sound Shield
5 6
6 5
7
7
4
1
MDKBP/R/V
61
Engine Sound Shield
3
2
MDKBP/R/V
62
Engine Sound Shield
5 4
3
8
2
MDKBP/R/V
63
Engine Sound Shield
(Front and Rear with out PTO)
2 1112
Rear 1 5
3
6 4 10
12
6
8 9
Front
7
MDKBP/R/V
64
Engine Sound Shield
(Front w/PTO)
14
3
11 1
11
2
4
6
5 7
12
11
8
13 9
10
MDKBP/R/V
65
Generator
4
5
3
2
6
12 13
1
14
7
8 11
9
10
16
17 12
18
15
19
20
23
21
27
26
28
29
22
24 30
25
26
MDKBP/R/V
66
Generator
MDKBP/R/V
67
Battery Harness Front
12
2
43 2
3 1
5
13
6
5 7
10
11
8
9
MDKBP/R/V
68
Battery Harness Rear
12 2
5
6
13
5 7 1
3 3
10 2
11
8 4
9
MDKBP/R/V
69
Control Box
29
4
15
28 12
27
6 12
15
17 19
15
14 18
5
13 18
1
11
9
14 20
16
10
21
23
12
16 13
14
13
12 9 26
7
8
14 7
15
11 12
12
12 15
2
13
22
3
25
24
MDKBP/R/V
70
Control Box
MDKBP/R/V
71
Control Panel Components
11 12
11
10 9
10
7 9
5
3
8
2
1 6
2
MDKBP/R/V
72
PCB Mounting
4 3
MDKBP/R/V
73
Control Panel Components
(Breaker Switch)
9
4
11
10
MDKBP/R/V
74
Remote Switch Panel
3
5
8 6
4 7
S11 2
P4
MDKBP/R/V
75
Remote Switch/Hourmeter Panel
1
10
4 3
9
6 8
5
7
P4
9
S11
REF PART QTY PART REF PART QTY PART
NO. NO. USED DESCRIPTION NO. NO. USED DESCRIPTION
MDKBP/R/V
76
Control Harness
J4
10
11
J4
7
8
5
S3
6
S4
3 P3 4
1 P2
P1
9
4
MDKBP/R/V
77
Wiring Harnesses
5
3
2
6
4 7
12
11
9
10
18
20 19
P1
21
17
21
22
23 22
23
J1
J2
MDKBP/R/V
78
Wiring Harnesses
16
15
14
13
MDKBP/R/V
79
Wiring Harnesses
4
3
5
1 6
338−4491
10 9 8
3 4
11
4
5
2
6
338−4982
13,14,15
MDKBP/R/V
80
Labels, Kits
MDKBP/R/V
81
Numerical Index
Part No. Page Part No. Page Part No. Page Part No. Page
82
Numerical Index
Part No. Page Part No. Page Part No. Page Part No. Page
83
Numerical Index
Part No. Page Part No. Page Part No. Page Part No. Page
84
Numerical Index
Part No. Page Part No. Page Part No. Page Part No. Page
85
Numerical Index
Part No. Page Part No. Page Part No. Page Part No. Page
504−0411, 24 516−2144, 9 526−2140, 11, 57, 58, 68, 800−2515, 48, 52, 53
505−0003, 43, 45 517−0131−02, 50, 52 69 800−3004, 33
505−0041, 43, 45 517−0133, 60 541−0585−01, 75 800−3005, 11
505−0304, 43, 45 517−0136, 60, 64, 65, 71 541−0585−02, 75 800−3029, 33
505−0339−02, 53 517−0136−01, 34 541−0823, 56 800−3030, 41
505−0446−01, 43, 45 517−0138−04, 64 541−0824, 56 800−3031, 56, 57
505−0759, 43, 45 517−0138−05, 71 541−0876−01, 38 800−3032, 11, 33, 48, 58,
505−2529, 7 517−0138−07, 60 541−0941−01, 75 68, 69
506−0028, 15 517−0138−08, 71 541−0941−02, 75 800−3033, 11, 48
507−0006, 9 517−0138−09, 50, 52 541−1168, 8 800−3042, 60, 73
507−0007, 10 517−0373, 6, 7 541−1169, 8 800−6002, 71, 72
507−0008, 10 517−0392−19, 61 541−1472−01, 52 800−6062, 71
507−0041, 13 518−0712, 13 541−1472−02, 52 800−6305, 15
507−0042, 9 518−0713, 13 541−1472−03, 52 800−6306, 15
508−0021, 60, 64, 65 518−0732, 8 541−1472−04, 52 800−6307, 14
508−0051, 60 520−2218−01, 51 541−1521, 44 800−6327, 19
508−0117, 34 520−2655, 26 541−1523, 44 800−6328, 21
508−1102, 38 526−0008, 67 656−0003, 74 800−6329, 12
508−1105, 71, 80 526−0029, 68, 69 718−1037, 53 800−6330, 22
508−1152, 60 526−0045, 31 725−1027, 32 800−6331, 21
508−1203, 67 526−0052, 71, 72 725−1053, 48 800−6332, 21
508−1216, 10 526−0054, 68, 69 725−1103, 48 800−6333, 17
508−1341, 25 526−0063, 32 740−1004, 52, 53 800−6334, 15, 23
509−0094, 67 526−0145, 11 750−1006, 34, 46, 51, 58 800−6335, 19
509−0368, 60 526−0172, 57 750−1010, 57 800−6395−01, 50, 52, 59,
800−0027, 31 60, 61, 63, 64, 65, 71, 73
509−0410, 23 526−0174, 48, 67
800−0051, 67 800−6414, 23
509−0412, 23 526−0219, 31
800−0090, 48 801−1050, 48
509−0413, 23 526−0399−11, 67
800−0104, 31 802−2068, 52, 53
509−0414, 22 526−0399−42, 67
800−0309−10, 74 810−0155, 71, 72
509−0416, 12 526−0399−44, 67
800−0310−27, 67 813−0100, 67
509−0418, 16 526−0399−58, 56
800−0310−36, 67 815−0550−03, 71
509−0428, 24 526−0399−62, 11
800−0310−64, 67 815−0910, 75, 76
509−0553, 14 526−0399−64, 33, 48
800−0317, 41 815−0916, 48
510−0112, 67 526−0413, 24
800−2056, 11 815−0935, 67
510−0265, 13 526−0451, 31, 48
800−2057, 41, 43, 58 815−1592, 24
510−0266, 13 526−1002, 74
800−2067, 52, 53 815−1593, 23
510−0267, 13 526−2050, 60, 73
800−2069, 31 815−1594, 23
511−0211, 81 526−2100, 11, 41, 43, 46,
51, 52, 53, 58, 71 800−2071, 31 815−1595, 23
511−0255, 28
526−2120, 41 800−2113, 11 815−1596, 28
512−0445, 28
800−2118, 57 818−0231−01, 63, 64, 71
514−0441, 21
86
Numerical Index
Part No. Page Part No. Page Part No. Page Part No. Page
818−0231−02, 60
818−0239−03, 61
818−1150−03, 72
821−0009, 71
821−2035, 48
821−6002−03, 24
821−6003−01, 34, 41, 43,
71
821−6003−02, 57
823−1002−03, 68, 69
850−0045, 31
850−0060, 31
850−0114−06, 67
850−0114−53, 56
850−0165, 41
850−2008, 53
853−0008, 67
853−0013, 67
853−0016, 56, 71
856−0006, 71, 72
856−0008, 58, 68, 69
856−0013, 58, 68, 69
860−2057, 60
862−0003, 68, 69
862−0016, 31
862−0026−30, 56
862−0026−54, 56
862−0026−55, 48
870−0131, 56, 67, 74
870−0221−01, 52
870−2055, 31
870−2062, 71, 72
870−2065−02, 64, 65
871−0016, 71, 72
871−0025, 58, 68, 69
895−0395, 62, 63
895−0402, 60
895−0411, 62
898−1311−01, 41, 43
87
Cummins Power Generation
1400 73rd Ave. NE
Minneapolis, MN 55432 USA
Phone 1 763 574 5000
Toll-free 1 800 888 6626
Fax 1 763 574 5298
Email www.cumminsonan.com/contact
www.cumminsonan.com
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are trademarks of Cummins Inc.
E2009 Cummins Power Generation, Inc. All rights reserved.