6 45
46
61
39a
39b
39
40 41
42
60
36
38
66
9 10
11 12
62
5d
5f
65
4 5d
5f 47
5
30
31
64
3g 7
45
3
66
68
71
1
(4x)
2
4
5f
5d
5g
8
9
10
11
3g
6
(4x)
7(4x)
5h
12
13
15
48
47
46
45
(2x)
44d
44a
43
44c 44b 36
41
40
(2x)
30
31
32(2x)
33(2x)
35
37
34
24
23
68
21(2x)
22(2x)
6
(2x)
39a
39b
42
16
70
44a 44b
44c 44d
44
26 38
29
27
53
28
FIG. PART NO. DESCRIPTION OF PART NO. REQ.
39 18-07-0315 Field Assembly (1)
39a --------------- Field Halve (1)
39b --------------- Field Halve (1)
40 42-28-0085 Rubber Block (2)
41 --------------- BaeFoot (1)
42 --------------- Bae (1)
43 42-96-0405 Rubber Bearing Cap (1)
44 16-10-0850 ArmatureAssembly (1)
44a 02-04-2110 Ball Bearing (1)
44b 31-86-0090 PlasticDisc (1)
44c --------------- Armature (1)
44d 45-88-0406 Washer (1)
45 05-78-0105 M4 x 10mm Pan Hd. Tapt.T-20Screw (2)
46 44-86-0155 BearingRetainer (1)
47 --------------- Pinion (1)
48 05-55-0620 M5HexNut (1)
49 12-20-6142 ServiceNameplate(NotShown) (1)
50 10-20-6142 WarningLabel(NotShown) (1)
53 05-78-0305 M3.5x7mmPanHd.PhillipsScrew (2)
60 42-14-0520 BaeAssembly (1)
61 44-86-0145 BearingRetainingPlateAssembly (1)
62 14-46-6105 FlangewithRampsAssembly (1)
64 14-46-0231 LockButtonKit (1)
65 14-46-0241 Spring/PinKit (1)
66 --------------- HandleSet (1)
68 --------------- Paddle Trigger Assembly (1)
70 42-55-6148 Canvas Tool Bag (1)
71 31-44-1026 HandleSetw/PaddleTrigger (1)
FIG. PART NO. DESCRIPTION OF PART NO. REQ.
1 05-88-1650 M4x25mmPanHd.STScrewT-20 (4)
2 42-62-0120 SideHandleAssembly (1)
3 14-30-0083 Gear Case Assembly (1)
3g 02-04-0620 Ball Bearing (1)
4 34-40-0180 O-Ring (1)
5 14-73-0462 SpindleHubAssembly (1)
5d --------------- SteelPin (1)
FIG. PART NO. DESCRIPTION OF PART NO. REQ.
5f --------------- Spring (1)
5g 44-20-0875 Guard Locking Tang (1)
5h 45-04-0031 M3x5mmPanHd.STT-8Screw (1)
6 05-90-0225 SpringWasher (6)
7 05-78-5316 M4x14mmPanHd.Tapt.T-20Screw (4)
8 43-54-1200 4.5"Type27Guard(StandardEquip.) (1)
9 --------------- O-Ring (1)
10 --------------- WaveySpring (1)
11 --------------- FlangewithRamps (1)
12 --------------- RetainingRing (1)
13 43-34-0935 InnerDiscFlange (1)
15 44-40-0035 OuterFlangeNut (1)
16 49-96-7215 SpannerWrench (1)
21 05-88-1300 M4x28mmPanHd.STT-20Screw (2)
22 05-88-1200 M4x16mmPanHd.STT-20Screw (2)
23 44-76-0095 CordProtector (1)
24 22-64-2021 PowerCord (1)
26 22-09-0720 PCBA (1)
27 23-66-2665 On-OSwitch (1)
28 23-74-1620 Brass Terminal (1)
29 23-74-1615 Brass Terminal (1)
30 --------------- Spring (1)
31 --------------- LockButton (1)
32 22-18-2240 CarbonBrushAssembly(Setof2) (1)
33 05-88-0030 M3x8.5mmPanHd.STT-10Screw (2)
34 31-50-6140 MotorHousing (1)
35 23-16-0075 Foam Block (1)
36 --------------- HandleSupport,LeftHandleHalve (1)
37 22-56-0150 ClosedEndWireConnector (1)
38 --------------- HandleCover,RightHandleHalve (1)
FIG. LUBRICATION
Use Type 'Y' Grease, No. 49-08-5270
3,5,47 WhenservicingtheGearCaseAssembly(3),Pinion(47)or
theSpindleHubAssembly(5):
90-95%oftheoldgreasemustberemovedpriortoanynew
greasebeingadded.Besurethatallgearteethareheavily
coatedwhenreassembling.
EXAMPLE:
ComponentParts(Small#)
Are Included When Ordering
TheAssembly(Large#).
0
00
Type 27
Guard is
Std. Equip.
Optional
Type 1
Guard
available.
Order No.
43-54-1210.
«
«= Part number change
from previous
service
partslist.
«
«
«
«
MILWAUKEE TOOL
l
www.milwaukeetool.com
13135W.LISBONRD.,BROOKFIELD,WI53005
Drwg.4
BULLETIN NO.
54-38-2322
SERVICE PARTS LIST
CATALOG NO. 6142-30
REVISEDBULLETIN
SPECIFY CATALOG NO. AND SERIAL NO. WHEN ORDERING PARTS
4.5" COMPACT ANGLE GRINDER with PADDLE SWITCH w/ lock-on
SERIAL NO.
DATE
June 2025
WIRINGINSTRUCTION
H40C & D
See Page 2
54-38-2321
Black from PCBA
White (thin) from PCBA
Black from Power Cord
White from Power Cord
Blue from PCBA
White from bottom right Field
White (thick) from PCBA
TOP VIEW
HANDLE SUPPORT (Left Handle Halve)
Install all components and route wires here before
securing with Handle Cover.
HANDLE COVER (Right Handle Halve)
Route and trap wires as shown in the illustrations
below. Be sure to place all components firmly and
squarely in handle halve cavities. Be sure the wires
are pushed to the bottom of wire traps. Check for any
interferences prior to installing the handle cover.
Check for proper switch and lock movement before
activating the tool.
