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 Milwaukee 5378-20 (SER 897A) 1/2" Electric Hammer Drill Parts

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 Fig # Img Part Name Availability Price
4
Cord Set
Cord Set
Part #: 22-64-0515
In stock
14 available
 $13.28
Add To Cart
5
Product Label Obsolete - Not Available
Part #: 10-07-5378
Discontinued
N/A
7
Strain Relief
Strain Relief
Part #: 44-76-0290
In stock
5 available
 $3.99
Add To Cart
100
Housing Assembly
Housing Assembly
Part #: 14-38-0445
In stock
1 available
 $20.41
Add To Cart
101
Handle Cushion
Handle Cushion
Part #: 44-52-0585
In stock
1 available
 $3.99
Add To Cart
102
Retaining Slug
Retaining Slug
Part #: 45-30-0055
Ships in 10 - 16 business days
 $0.97
Add To Cart
103
Retaining Slug
Retaining Slug
Part #: 45-30-0195
In stock
2 available
 $0.68
Add To Cart
104
Screw
Screw
Part #: 05-78-0715
In stock
7 available
 $0.68
Add To Cart
105
Field
Field
Part #: 18-07-0150
In stock
3 available
 $26.62
Add To Cart
106
Armature and Field Kit
Armature and Field Kit Obsolete - Not Available
Part #: 14-46-1240
Note: Includes Figures 107-111
Discontinued
N/A
107
Fan
Fan
Part #: 22-84-0930
Note: Included In Figure 106
Ships in 10 - 16 business days
 $1.20
Add To Cart
109
Ball Bearing
Ball Bearing
Part #: 02-04-1820
Note: Included In Figure 106
In stock
2 available
 $6.95
Add To Cart
110
Bushing
Bushing
Part #: 42-40-1045
Note: Included In Figure 106
Ships in 10 - 16 business days
 $3.14
Add To Cart
111
Bearing Cover
Part #: 42-92-0070
Note: Included In Figure 106
Ships in 10 - 16 business days
 $1.03
Add To Cart
112
Wire
Wire
Part #: 23-94-1045
In stock
2 available
 $2.99
Add To Cart
Fig #ImgPart NameAvailabilityPrice
113
Wire
Wire
Part #: 23-94-1050
In stock
2 available
 $3.99
Add To Cart
114
Brush Assembly - Lower
Brush Assembly - Lower
Part #: 22-22-0885
In stock
14 available
 $11.90
Add To Cart
115
Brush Assembly - Upper
Brush Assembly - Upper
Part #: 22-22-0890
In stock
18 available
 $6.95
Add To Cart
116
Brush Holder
Brush Holder
Part #: 22-20-0225
In stock
12 available
 $2.99
Add To Cart
117
Cord Clamp
Cord Clamp
Part #: 31-17-0240
In stock
2 available
 $0.68
Add To Cart
118
Wire
Wire
Part #: 23-94-1055
In stock
1 available
 $0.68
Add To Cart
119
Wire
Wire
Part #: 23-94-1060
Ships in 10 - 16 business days
 $0.68
Add To Cart
120
Screw
Screw
Part #: 06-82-9640
In stock
6 available
 $1.99
Add To Cart
121
Screw
Screw
Part #: 05-78-0720
In stock
1 available
 $0.68
Add To Cart
122
Screw
Screw
Part #: 05-81-0932
Ships in 10 - 16 business days
 $0.68
Add To Cart
123
Screw
Screw
Part #: 05-81-0960
Ships in 10 - 16 business days
 $0.68
Add To Cart
124
Rubber Sleeve
Rubber Sleeve
Part #: 45-22-0550
In stock
2 available
 $0.68
Add To Cart
137
Switch Lever
Switch Lever
Part #: 44-10-0065
Backorder:
No ETA.
 $6.84
Add To Cart
202
Washer
Washer
Part #: 45-88-8295
In stock
2 available
 $0.68
Add To Cart
203
Spring
Spring
Part #: 40-50-8890
In stock
2 available
 $0.68
Add To Cart
Fig #ImgPart NameAvailabilityPrice
204
Ball Bearing
Ball Bearing
Part #: 02-04-1830
In stock
2 available
 $7.18
Add To Cart
205
Ratchet
Ratchet
Part #: 44-84-0295
In stock
3 available
 $2.34
Add To Cart
206
Seal Ring
Seal Ring
Part #: 44-90-0004
In stock
1 available
 $2.34
Add To Cart
207
Snap Ring
Snap Ring
Part #: 44-90-0365
In stock
3 available
 $3.99
Add To Cart
208
Washer
Washer
Part #: 45-88-1300
In stock
1 available
 $0.68
Add To Cart
209
Spindle Gear
Spindle Gear
Part #: 32-75-1220
Ships in 10 - 16 business days
 $12.94
Add To Cart
210
Shift Ring
Shift Ring
Part #: 44-90-4505
Ships in 10 - 16 business days
 $15.56
Add To Cart
212
Thrust Washer
Thrust Washer
Part #: 45-88-8335
In stock
1 available
 $0.68
Add To Cart
213
Pin
Pin
Part #: 44-60-1490
In stock
2 available
 $3.99
Add To Cart
214
Shift Lever
Shift Lever
Part #: 44-10-0095
In stock
7 available
 $3.99
Add To Cart
215
Retaining Spring
Retaining Spring
Part #: 40-50-8355
In stock
4 available
 $3.99
Add To Cart
216
Shifting Clip
Shifting Clip
Part #: 42-70-0790
In stock
2 available
 $3.99
Add To Cart
217
Pin
Pin
Part #: 44-60-1470
Ships in 10 - 16 business days
 $0.80
Add To Cart
218
Thrust Washer
Thrust Washer
Part #: 45-88-8345
In stock
2 available
 $0.68
Add To Cart
219
Shift Lever
Shift Lever
Part #: 44-10-0105
In stock
2 available
 $3.99
Add To Cart
Fig #ImgPart NameAvailabilityPrice
220
Pin
Pin
Part #: 44-60-1500
Ships in 10 - 16 business days
 $3.99
Add To Cart
221
Reduction Gear/Spindle Gear Kit
Reduction Gear/Spindle Gear Kit
Part #: 14-46-5378
Ships in 10 - 16 business days
 $43.44
Add To Cart
222
Pin
Pin
Part #: 44-60-1475
In stock
2 available
 $0.68
Add To Cart
223
Ball
Ball
Part #: 02-02-0110
In stock
7 available
 $3.99
Add To Cart
224
Ball
Ball
Part #: 02-02-0115
In stock
3 available
 $3.99
Add To Cart
225
Ball
Ball
Part #: 02-02-0125
In stock
4 available
 $3.99
Add To Cart
226
Ball
Ball
Part #: 02-02-0105
In stock
8 available
 $3.99
Add To Cart
227
Gasket
Gasket
Part #: 43-44-0345
In stock
2 available
 $3.99
Add To Cart
420
Gearcase
Gearcase
Part #: 31-40-0020
Ships in 10 - 16 business days
 $29.75
Add To Cart
423
Spindle
Spindle
Part #: 38-50-0042
In stock
2 available
 $16.99
Add To Cart
425
Diaphragm
Part #: 26-28-1865
Ships in 10 - 16 business days
 $33.92
Add To Cart
491
Reverse Module
Reverse Module
Part #: 14-20-5378
Note: Variable Speed Switch
Backorder:
No ETA.
 $29.81
Add To Cart
800
Chuck Retaining Screw
Chuck Retaining Screw
Part #: 05-80-0430
In stock
12 available
 $3.99
Add To Cart
801
Chuck
Chuck
Part #: 48-66-5185
In stock
25+ available
 $32.05
Add To Cart
108
Ball Bearing
Ball Bearing
Part #: 02-04-1825
Note: Included In Figure 106
In stock
3 available
 $4.22
Add To Cart
135
Switch
Switch
Part #: 23-66-1692
In stock
25 available
 $20.46
Add To Cart
802
Side Handle
Side Handle
Part #: 31-05-5265
In stock
13 available
 $12.02
Add To Cart
803
Warning Label Obsolete - Not Available
Part #: 10-15-0270
Discontinued
N/A

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Drill Parts  Hammer Drill Parts

Repair Guides
Power Tool Care and Maintenance 101
Power Tool Care and Maintenance 101

This article suggests guidelines for power tool care and maintenance. It also describes information tools available at eReplacementParts.com.

Power Switch Repair 101
Power Switch Repair 101

This article is a 101 repair guide for power tool switch replacements, explaining the general steps involved in replacing a switch assembly.

How to Remove a Drill Chuck

This video explains steps for how to remove threaded-on chucks and taper-fit drill chucks, as well as steps for removing a spindle from an open-center chuck.

Tool Diagnosis: Is it the Brushes or the Switch?
Tool Diagnosis: Is it the Brushes or the Switch?

This article describes the differences between power switch and carbon brush failure symptoms.

Discussion
Discussion for the Milwaukee 5378-20 (SER 897A) 1/2" Electric Hammer Drill

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  • Subject:
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  • Comment:
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My new 23-66-1692 switch has completely different terminals than the origional switch. Any diagrams available for the new switch? Wiring Instruction bulletin 58-01-1150 is not similar to my new switch. 8 wires and no instructions.
WJA
Reply: Milwaukee Drilll 5378-20 Switch ...

WJA

Hello 105691,

See if this wiring diagram will help. Here is a link to it link removed 5378-20 Wiring diagram

Hope this helps,
-WJA
MilwaukeeEd
Reply: Milwaukee Drilll 5378-20 Switch ...

MilwaukeeEd

It doesn't. It's the diagram for wiring the superseded switch, P/N 23-66-1690 on the 5378-20 drill, SN beginning with 897A. What's needed is a diagram to wire the [I]replacement[/I] switch, P/N 23-66-1692 to the the drill.

Any help would be greatly appreciated.
Does anyone know how to separate the two halves of the red plastic handle on a Milwaukee hammer drill [5378-20]? I've removed all screws and searched for hidden pins and springs to no avail. I am hesitant to force the handle apart because the material, though flexible, seems a bit fragile.
Thanks lots.
Ken
Tinkerdave
Reply: Replacing Brushes 5378-20 Milwau...

Tinkerdave

Hi jcobb,

The back handle cushion has to come off .Also the 4 long screws that hold the front drive unit have to come out and the drive unit moved slightly forward for the two half to separate. Hope this helps.Good luck.
Tinker
jcobb
Reply: Replacing Brushes 5378-20 Milwau...

jcobb

Hello Tinkerdave,

Thanks for the information. I had removed the four long screws that hold the front parts to the red handle. Also, I removed the black rubbery grip. I am only able to move the medial section about 1/8"-3/16" forward, but still the red handles seem inseparably bonded to each other and maybe internal parts. It's a real puzzle--looks like it oughta come apart.

Thanks again for your reply and info.

Jcobb
How does the red plastic case separate. I'v removed all the screws, right side and front. Also rubber grip. Won't budge. Can't find any detents or clips. Thanks.
715942
Question: Milwaukee HD Hammer Drill

tvignoe

throwing a lot of sparks where brushes make contact, replaced brushes didn't help, before I go any further buying parts what could problem be.
WJA
Reply: Milwaukee HD Hammer Drill

WJA

Most likely it is the armature. Make sure you look at the serial number on your tool. Milwaukee has made a service change on this tool depending on its serial number.

Hope that helps,
WJA
Tom
Question: Wiring The Switch

Tom

Can anyone give me wiring directions for switch #23-66-1692 as used on hammer drill #5378-20. thanks.
ron
Question: Chuck Removal

ron

is the chuck right or left hand thread thank you Milwaukee 1/2 hammerdrill 5378-20 897a
Mark
Reply: Chuck Removal

Mark

Hi Ron,

The screw holding the chuck to the drill will be a reverse thread or clockwise to remove. The chuck itself is a regular thread or counterclockwise to remove. We have a very helpful article available which contains everything you need to know to remove a drill chuck. You can find the article at the following link...

http://www.ereplacementparts.com/removing-drill-chuck-c-8873_15176.html

I hope this helps with your repair!

-Mark
Accessories
Accessories for the 5378-20

Hole Saws:
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1-1/8" Hole Saw - 1/2"-20 Thread
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11/16" Hole Saw - 1/2"-20 Thread
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49-56-0207
3-7/8
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