BULLETIN NO.

SERVICE PARTS LIST 54-24-6100

SPECIFY CATALOG NO. AND SERIAL NO. WHEN ORDERING PARTS REVISED BULLETIN DATE
July 2011
1/2" HAMMER-DRILL
WIRING INSTRUCTION
STARTING
EXAMPLE: CATALOG NO. 5375-20 SERIAL NO. C50A See Page Three
00 0 Component Parts (Small #)
Are Included When Ordering SEE REVERSE SIDE FOR
The Assembly (Large #). 60 61
62 SERVICE & GREASE NOTES

67
53 (2x) 64
54 (2x) 65

55 (2x)
62
41
37 38
39
63
61 39
36
35
23
57 (5x) 50 29 14
66 27
48 20
45 24
38
49
43 45 21
15 3 4 5 6 7
56 8 9 10 11
28
68 69 70 72
73 76 77
26
25
47 24 22
46 25
69 42 24
70 31
58 (2x)
30
73 11
8 10
7 13
6 (3x) 12
76 9 (3x)

77 5
4
72 2
78
FIG. PART NO. DESCRIPTION OF PART NO. REQ. Apply a drop of Blue Loctite®
thread locking adhesive to chuck 1
1 05-88-1500 M6 x 27 Chuck Screw (1)
2 48-66-1356 Chuck (1) screw (1) prior to installing onto
3 28-14-5375 Gearcase Assembly (1) spindle (9).
4 34-80-5380 Retaining Ring (1)
5 43-44-5380 Oil Seal (1)
6 02-04-5380 Ball Bearing (1)
7 44-84-5375 Rotating Ratchet (1) FIG. PART NO. DESCRIPTION OF PART NO. REQ.
8 44-84-5376 Fixed Ratchet (1) 49 02-04-5376 Ball Bearing (1)
9 38-50-5375 Spindle Shaft (1) 50 31-50-5375 Motor Housing (1)
10 --------------- Gearcase (1) 51 23-94-5376 90mm Leadwire Assembly (Not Shown) (1)
11 --------------- Needle Bearing (1) 52 23-94-5377 55mm Leadwire Assembly (Not Shown) (1)
12 06-81-5376 M4 x 32 ST T-20 Screw (3) 53 06-81-5381 M3 x 6 Screw (2)
13 45-88-0686 Spring Washer (3) 54 44-66-5379 Brush Holder Retaining Plate (2)
14 43-44-5381 Rubber Seal (1) 55 22-22-1560 120V Carbon Brush Assy. (Incl. Spring & Holder) (2)
15 14-34-5375 Selector Housing Assembly (1) 56 12-20-5375 Service Nameplate (1)
20 43-44-5378 Felt Seal (1) 57 05-88-1200 M4 x 16 Screw (5)
21 43-96-5375 Speed Selector Key (1) 58 05-88-5375 M4 x 13.5 Screw (2)
22 32-40-5375 Spindle Gear (1) 59 23-94-5378 95mm Leadwire Assembly (Not Shown) (1)
23 43-44-5375 Gasket (1) 60 14-34-5377 Rear Handle Assembly (1)
24 45-88-0687 Washer (4) 61 --------------- Right Handle Halve (1)
25 02-80-5380 Thrust Bearing (2) 62 --------------- Left Handle Halve (1)
26 40-50-5380 Spring (1) 63 23-66-5375 120V Switch Assembly (1)
27 45-88-5378 Washer (1) 64 31-17-0195 Cord Clamp (1)
28 02-02-5380 Ball (1) 65 05-88-5376 M4 x 14 Screw (2)
29 44-60-5381 Pin (1) 66 44-76-0210 Cord Protector (1)
30 45-88-5381 Washer (1) 67 22-64-0216 Cord Set (1)
31 14-29-5375 Gear Shaft Assembly (1) 68 14-34-5384 Side Handle Assembly (1)
35 05-88-5380 M3.5 x 10 Screw (2) 69 40-50-5379 Side Handle Clamping Band (1)
36 42-36-5380 Pinion Support (1) 70 05-81-5380 M8 x 53 Hex Bolt (1)
37 28-14-5376 Diaphragm Assembly (1) 72 45-88-5377 Washer (1)
38 --------------- Needle Bearing (1) 73 31-05-5379 Side Handle (1)
39 --------------- Needle Bearing (1) 76 44-94-5381 Depth Gauge Rod (1)
41 42-34-5380 Rubber Slug (1) 77 14-34-5381 Side Handle Carrier Assembly (1)
42 43-44-5377 Seal Ring (1) 78 48-66-1357 Chuck Key (1)
43 14-34-5376 Baffle Assembly (1) 79 48-66-4040 Chuck Key Holder (Not Shown) (1)
45 42-34-5380 Rubber Slug (2)
46 02-04-5375 Ball Bearing (1)
47 16-10-5375 120V Service Armature (1) MILWAUKEE ELECTRIC TOOL CORPORATION
48 18-07-5375 120V Service Field (1) 13135 W. Lisbon Road, Brookfield, WI 53005
Drwg. 2
 15

Service Notes 14
15 Slotted
DO NOT attempt to disassemble selector housing assembly (15). 2 opening
21
NOTE: Gasket (23), selector housing assembly (15), speed selector key (21), 14
rubber seal (14) and felt seal (20) must be assembled onto the diaphragm 37 21 20
assembly (37) prior to installing onto gearcase assembly (3).
23
1. Place gasket (23) onto diaphragm assembly (37).

2a. Assemble speed selector key (21) onto selector housing assembly
(15). The speed selector key will be seated on a pin in a like-shaped 1
cavity of the selector housing assembly.

2b. Saturate felt seal (20) with a lightweight oil and place in
selector housing assembly (15) over selector key (21). 1/4 oz. ‘P’ Grease

2c. Place rubber seal (14) onto other side of selector

housing assembly (15).
29
2d. Orient the selector housing
assembly (15) and the assembled 28
20
components (14, 20 and 21) above 27
the diaphragm assembly (37). 21 26
All elements should slide straight
15 24
down onto the diaphragm with
the speed selector key (21) 14
22 37 38
39
sliding into slotted opening.
25 24
3. Assemble above listed parts 31
onto gearcase assembly (3). 23

10
24
8
7 31
6
30 1/8 oz. ‘P’ Grease
9

3 4 5 6 7
8 9 10 11

1/16 oz. ‘U’ Grease

23 15

When servicing, remove 90-95% 20

of the existing grease prior to
Lubrication Instructions installing Type 'P' grease.
Original grease maybe similar in
Type “P” (49-08-4250) color but not compatible with 'P'. 21
Type “U” (49-08-0150)

1. Coat ratchets (7, 8) with 1/16 oz. of Type “U” grease, No. 49-08-0150.
31
2. Place 1/8 oz. of Type “P” grease, No. 49-08-4250, around the gear shaft
assembly (31) area of gearcase (10) .

3. Lubricate gear assembly (parts 11, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 10
35, 36, 38 and 39) using 1/4 oz. of Type “P” grease, No. 49-08-4250.

Total amount of lubrication: approximately 1/2 oz.

Saturate felt seal (20) with lightweight oil before assembling onto selector
Back View of Gearcase Assembly
housing assembly (15).
(Shown without Diaphragm to illustrate
component placement)
Do not place gear shaft assembly (31) in solvent solution. Wipe off with a
clean dry cloth.
 Top
= WIRE TRAPS Carbon Brush
Assembly

6 6

7
5

5 Bottom
Carbon Brush 7
Assembly
6
5
4

3
3

5
5 4 Switch terminal barrels on
wires 3 & 4 are to face outward
1
1
2
2
3

1 5 2

Cord jacket to extend Switch terminal barrels on 7 6

wires 6 and 7 are to face outward
.25” minimum beyond
cord clamp.

NOTE: As an aid to reassembly, 3

take note of the wire routings and
position of the wires in the wire guides
and traps prior to dismantling the tool.

Watch for pinched wires when placing

the handle cover back over the
housing assembly.
2 5 1

NOTE:
WIRING SPECIFICATIONS All leads must be held to ± 1/8".
Wire Wire Origin or All lead lengths are before stripping.
No. Color Gauge Length Terminals, Connectors and 1 or 2 End Wire Preparation
1 Black Cord ----- Component of cordset. Connect to switch as shown.
TERMINAL DESCRIPTION
2 White Cord ----- Component of cordset. Connect to switch as shown. Code Part No. Qnty.
3 Black 23-94-5378 95mm Jumper - leadwire assembly. Connect to switch as shown.
4 Black 23-94-5377 55mm Connect to switch and bottom carbon brush assembly as shown.
5 Black Field ----- Component of field. Connect to switch as shown.
6 White 23-94-5376 90mm Connect to switch and top carbon brush assembly as shown.
7 Red Field ----- Component of field. Connect to switch as shown.

BULK LEAD WIRE - BULLETIN NO. 58-01-0003