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Milwaukee 5378-20 (SER 897A) 1/2 milwaukee logo

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

Page A

 Fig # Img Part Name Availability Price
4Cord Set
Part #: 22-64-0515
In stock
2 available
 $13.34
Add To Cart
5
Product Label Obsolete - Not Available
Part #: 10-07-5378
Discontinued
N/A
7Strain Relief
Part #: 44-76-0290
In stock
4 available
 $3.99
Add To Cart
100Housing Assembly
Part #: 14-38-0445
In stock
4 available
 $20.48
Add To Cart
101Handle Cushion
Part #: 44-52-0585
In stock
4 available
 $3.99
Add To Cart
102Retaining Slug
Part #: 45-30-0055
In stock
2 available
 $0.99
Add To Cart
103Retaining Slug
Part #: 45-30-0195
In stock
2 available
 $0.99
Add To Cart
104Screw
Part #: 05-78-0715
In stock
5 available
 $0.99
Add To Cart
105Field
Part #: 18-07-0150
In stock
3 available
 $26.72
Add To Cart
106Armature and Field Kit Obsolete - Not Available
Part #: 14-46-1240
Note: Includes Figures 107-111
Discontinued
N/A
107Fan
Part #: 22-84-0930
Note: Included In Figure 106
Ships in 7 - 11 business days
 $1.20
Add To Cart
108Ball Bearing
Part #: 02-04-1825
Note: Included In Figure 106
In stock
4 available
 $4.23
Add To Cart
109Ball Bearing
Part #: 02-04-1820
Note: Included In Figure 106
In stock
3 available
 $6.98
Add To Cart
110Bushing
Part #: 42-40-1045
Note: Included In Figure 106
In stock
2 available
 $3.15
Add To Cart
111
Bearing Cover
Part #: 42-92-0070
Note: Included In Figure 106
Ships in 7 - 11 business days
 $1.03
Add To Cart
Fig #ImgPart NameAvailabilityPrice
112Wire
Part #: 23-94-1045
In stock
2 available
 $0.99
Add To Cart
113Wire
Part #: 23-94-1050
In stock
4 available
 $0.99
Add To Cart
114Brush Assembly - Lower
Part #: 22-22-0885
In stock
12 available
 $11.90
Add To Cart
115Brush Assembly - Upper
Part #: 22-22-0890
In stock
11 available
 $6.98
Add To Cart
116Brush Holder
Part #: 22-20-0225
In stock
11 available
 $2.99
Add To Cart
117Cord Clamp
Part #: 31-17-0240
In stock
4 available
 $0.99
Add To Cart
118Wire
Part #: 23-94-1055
In stock
1 available
 $0.99
Add To Cart
119Wire
Part #: 23-94-1060
In stock
3 available
 $0.99
Add To Cart
120Screw
Part #: 06-82-9640
In stock
4 available
 $0.99
Add To Cart
121Screw
Part #: 05-78-0720
In stock
4 available
 $0.99
Add To Cart
122Screw
Part #: 05-81-0932
Ships in 7 - 11 business days
 $0.99
Add To Cart
123Screw
Part #: 05-81-0960
In stock
2 available
 $0.99
Add To Cart
124Rubber Sleeve
Part #: 45-22-0550
In stock
2 available
 $0.99
Add To Cart
135Switch
Part #: 23-66-1692
In stock
20 available
 $20.55
Add To Cart
137Switch Lever
Part #: 44-10-0065
In stock
4 available
 $6.86
Add To Cart
Fig #ImgPart NameAvailabilityPrice
202Washer
Part #: 45-88-8295
In stock
2 available
 $0.99
Add To Cart
203Spring
Part #: 40-50-8890
In stock
3 available
 $0.99
Add To Cart
204Ball Bearing
Part #: 02-04-1830
In stock
2 available
 $7.21
Add To Cart
205Ratchet
Part #: 44-84-0295
In stock
6 available
 $2.36
Add To Cart
206Seal Ring
Part #: 44-90-0004
In stock
2 available
 $2.36
Add To Cart
207Snap Ring
Part #: 44-90-0365
In stock
2 available
 $0.99
Add To Cart
208Washer
Part #: 45-88-1300
In stock
2 available
 $0.99
Add To Cart
209Spindle Gear
Part #: 32-75-1220
Ships in 7 - 11 business days
 $12.99
Add To Cart
210Shift Ring
Part #: 44-90-4505
Ships in 7 - 11 business days
 $15.63
Add To Cart
212Thrust Washer
Part #: 45-88-8335
In stock
2 available
 $0.99
Add To Cart
213Pin
Part #: 44-60-1490
In stock
1 available
 $0.99
Add To Cart
214Shift Lever
Part #: 44-10-0095
In stock
3 available
 $3.99
Add To Cart
215Retaining Spring
Part #: 40-50-8355
In stock
3 available
 $0.99
Add To Cart
216Shifting Clip
Part #: 42-70-0790
In stock
3 available
 $1.49
Add To Cart
217Pin
Part #: 44-60-1470
Ships in 7 - 11 business days
 $0.99
Add To Cart
Fig #ImgPart NameAvailabilityPrice
218Thrust Washer
Part #: 45-88-8345
In stock
2 available
 $0.99
Add To Cart
219Shift Lever
Part #: 44-10-0105
In stock
3 available
 $3.99
Add To Cart
220Pin
Part #: 44-60-1500
In stock
2 available
 $0.99
Add To Cart
221Reduction Gear/Spindle Gear Kit
Part #: 14-46-5378
Ships in 7 - 11 business days
 $43.44
Add To Cart
222Pin
Part #: 44-60-1475
In stock
2 available
 $0.99
Add To Cart
223Ball
Part #: 02-02-0110
In stock
4 available
 $3.99
Add To Cart
224Ball
Part #: 02-02-0115
In stock
3 available
 $0.99
Add To Cart
225Ball
Part #: 02-02-0125
In stock
4 available
 $0.99
Add To Cart
226Ball
Part #: 02-02-0105
In stock
4 available
 $0.99
Add To Cart
227Gasket
Part #: 43-44-0345
In stock
4 available
 $0.99
Add To Cart
420Gearcase
Part #: 31-40-0020
Ships in 7 - 11 business days
 $29.87
Add To Cart
423Spindle
Part #: 38-50-0042
In stock
3 available
 $17.05
Add To Cart
425
Diaphragm
Part #: 26-28-1865
Ships in 7 - 11 business days
 $34.05
Add To Cart
491Reverse Module
Part #: 14-20-5378
Note: Variable Speed Switch
In stock
2 available
 $29.94
Add To Cart
800Chuck Retaining Screw
Part #: 05-80-0430
In stock
11 available
 $3.99
Add To Cart
Fig #ImgPart NameAvailabilityPrice
801Chuck
Part #: 48-66-5185
In stock
18 available
 $32.05
Add To Cart
802Side Handle
Part #: 31-05-5265
In stock
6 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

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Repair Stories
Symptom:
Defective Switch
Parts Used:
Part Number:
Repair Difficulty:
Easy
Time Spent Repairing:
30-60 minutes
Tools Used:
Entry Date:2015-04-28 08:10:10
0 of 0 customers found these instructions helpful
Variable speed trigger switch burned out
Remove back strap cover on drill grip by prying off straight back(start at Top). Remove all philips screws from body side cover. Remove 2 torx screws from front of black gear case that attach to body side cover. Remove body side cover. Locate switch and remove Black and White power cord wires by loosening retaining screws. Use pick to remove pig tail wires from switch. To install new switch you will need the wiring diagram from the Milwaukee web site.(wish they would include it with the new switch). Assemble drill in reverse order of disassembly. (Do not completely tighten any screws until all are installed.
Did these repair instructions help you?
Symptom:
Worn Brushes
Parts Used:
Part Number:
Repair Difficulty:
Medium
Time Spent Repairing:
15-30 minutes
Tools Used:
Entry Date:2015-03-03 11:45:00
0 of 0 customers found these instructions helpful
Brushes were worn out to the point that the drill stopped working while I was using it.
The handle grip has tabs were a little difficult to get loose . My drill was kind of a puzzle to take apart , my first time to try this. The Torx screws needed to come out first to separate the handle from the \"gear box\" , then the handle could be split into halves . Be sure to release the tabs, by pressing down gently with a flat bladed screwdriver,on the information plate. It is in front the switch on the underside of the handle portion.
The brushes replacement was actually pretty easy. There is an upper part number 22-22-0890 and lower part number 22-22-0885 , but they are color coded. They are held by a type of pressure clip fitting that can be opened with a small flat bladed screwdriver no soldering. The next assemble item will be to hold the new longer carbon brushes apart while sliding them around the \"commutator\".
All and all , taking on this task myself probably saved me at least $100.00. It works good as new now.
Did these repair instructions help you?
Discussion
Discussion for the Milwaukee 5378-20 (SER 897A) 1/2" Electric Hammer Drill

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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
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

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