Part Location Diagram of CB304 Makita A.c. Carbon Brush Cb-304 (set
See part 91 in the diagram
( Grid squares measure 1x1 inch )

A.c. Carbon Brush Cb-304 (set CB304

Manufactured by:
Makita
ERP Number:
ERP10156650
Part Number:
CB304
Original Equipment Manufacturer ?
In Stock
Delivers in 3-5 Business Days!

Easy 

15 - 30 mins 

(1 rated repair) ?

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Product Description

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This is an authentic replacement part manufactured for use with Makita demolition hammers. Worn out brushes can cause the motor to spark, or not turn on at all. Brushes are usually the first thing to wear out on a power tool because they are in constant contact with the moving armature. It is recommended to replace the brush if it is worn to about an eighth of an inch from the wire lead, or if there are any burn marks indicating the brush has overheated. These brushes are available in pairs and the pairs are sold individually.

Troubleshooting

This part works with the following brands:
  • Makita
This part works with the following products:
  • Demolition Hammer
  • Hammer Drill
Part# CB304 replaces these:
CB-304,

Customer Part Reviews

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Customer Repair Instructions

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Easy 

15 - 30 mins 

(1 rated repair) ?
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Sorry, we couldn't find any existing installation instruction that matched.

The drill simply had intermittent Motor function. Sometimes it would run and others it would do nothing when the trigger was pulled. To be safe I ordered both the switch and carbon brushes

Steven from New Haven , Connecticut

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers
Parts Used:
CB304, 651922-3
I simply removed a few screws on the handle to replace the switch and a few others on the brush covers to access the carbon brushes. I pulled the old ones out and installed the new ones. Total time for both parts was about 20 minutes and my drill works like new again.
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