Easy
15-30 minutes
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.
A.c. Carbon Brush Cb-304 (set CB304
OEM part for: Makita
Part Number: CB304
$17.57
In Stock
Ships within 1 business day 
Compatibility
This part will fit the following 6 machines
Makita
HM1100C Demolition Hammer View Diagrams & Manuals
HR4000C Rotary Hammer View Diagrams & Manuals
HM1140C Demolition Hammer View Diagrams & Manuals
HR3000C Rotary Hammer View Diagrams & Manuals
HR4040C Rotary Hammer View Diagrams & Manuals
HM0860C Demolition Hammer View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Demolition Hammer Parts
- Rotary Hammer Parts
This part replaces obsolete part #: 191961-6
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Good price. Very fast delivery.
Easy install. Turns out, wasn't the problem. Very pleased with the service.
Guest -
July 9, 2023
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
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 - October 15, 2018
👍 1 of 1 people found this instruction helpful
Tool Type
Rotary Hammer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
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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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
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