Part Location Diagram of N157129 DeWALT Carbon Brush With Holder
See part 6 in the diagram
( Grid squares measure 1x1 inch )

Carbon Brush With Holder N157129

Manufactured by:
DeWALT
ERP Number:
ERP10188793
Part Number:
N157129
Original Equipment Manufacturer ?
  Works with your model  DC855KA!
In Stock
Delivers in 3-5 Business Days!

Easy 

15 - 30 mins 

(15 rated repairs) ?
  Works with your model   DC855KA!

Product Description

?

Genuine Dewalt replacement part, this item is sold individually. This part contains the Brush Holder,Brush Spring and Brush. It is used on all of the tools listed below. It is always best to replace both brushes, even if only one is worn. Worn brushes frequently are the cause behind a motor running poorly. Replacing brushes can fix a motor that's operating intermittently. New brushes can restore a motor's electric braking. Carbon brushes are one of the most commonly replaced power tool parts. This is because carbon brushes are wear items, meaning that through friction and use they will gradually wear away until they need replacing. Worn brushes are a common causes of intermittent motor function, reduced electric braking and reduced motor power. A worn-out brush will often be worn down near to the wire lead and can be cracked, pitted, or burned. When replacing carbon brushes, be sure to inspect your armature for burns, cracks, or other damage which can indicate larger motor problems.

Frequently Purchased Together

?

Troubleshooting

This part works with the following brands:
  • DeWALT
This part works with the following products:
  • Impact Driver
  • Wrench
  • Cordless Drill
  • Hammer Drill

Customer Part Reviews

?
5.0
Average Rating (out of 5):
★★★★★
★★★★★
(5 Reviews)
Click to filter by ratings:
  • 5 stars
    5
  • 4 stars
    0
  • 3 stars
    0
  • 2 stars
    0
  • 1 star
    0
  • 1
Sort by:  
Sorry, we couldn't find any existing reviews that matched. Try using some different or simpler keywords.

Questions & Answers

?

Our customer Service team is at the ready daily to answer your part and product questions.

We're sorry, but our Q&A experts are temporarily unavailable.
Please check back later if you still haven't found the answer you need.

Ask our Team

We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.

Does this fit my product?

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.

Easy 

15 - 30 mins 

(15 rated repairs) ?
  • 1
  • 2
Sort by:  
Sorry, we couldn't find any existing installation instruction that matched.

Drill motor brushes needed to be replaced

David from Lansdale, Pennsylvania

4 of 4 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Pliers, Screw drivers
Parts Used:
N157129, N157123
0. Remove battery from drill
1. Removed screws holding drill housing together
2. Opened drill clamshell housing
3. Removed screws holding motor in place and removed motor to get access to both halves of old brush assembly
4. Disconnected and removed old brush assembly using needle nose pliers
5. Inst alled and connected bottom brush assembly
6. Reinstalled motor, attached second (top) brush assembly and reinstalled motor hold down clamp and screws
7. Closed clamshell housing and reinserted screws making sure trigger and forward/ reverse toggle switch were properly aligned and operational before reinstalling screws.

Tested it out
Did you find this story helpful?
Thank you for voting!

Brushes worn out .

KENNETH from MANVILLE, New Jersey

3 of 3 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Screw drivers
Parts Used:
N157129, N157123
Remove the screws from the housings
Disconnect the brush leads
Remove the brush assemblies
Install the new brushes
Connect the brush leads
Make sure all of the parts are in their correct place
Screw the housings together
Did you find this story helpful?
Thank you for voting!

Brushes was worn out

Marvin from Westernport, Maryland

2 of 2 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers
Parts Used:
N157129, N157123
Opened up the case with the screwdriver and pulled out the old brushes. Disconnected the wires and secured the new brushes in place. Reconnected the wires and put the case back on.
Did you find this story helpful?
Thank you for voting!

Reverse lever broke

Harold from Fort Walton Bch, Florida

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Screw drivers
Parts Used:
N157129, 642891-00
1.Used star driver to disassemble drill
2. Replaced brushes because I have had the drill for sometime and use it every day
3. Also replaced the broken reverse lever.
4. Drill working very well for its age
Did you find this story helpful?
Thank you for voting!

needed new brushes

Mike from Texarkana, Texas

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers
Parts Used:
N157129, N157123
removed torx screws and unplugged old brushes and replaced. very easy
Did you find this story helpful?
Thank you for voting!

Running poorly

Kevin from Oakbrook Terrace, Illinois

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Pliers, Screw drivers
Parts Used:
N157129, N157123
1. Removed screws 2. Removed wire with pliers, 3. Removed 1 brush 4. Removed 2 screws and bearing retainer clip 5. Removed other brush 6. Used emery cloth to clean armature for better brush contact. 7. Complete reverse. 8. Installed battery 9. Pulled trigger to test all functions. 10. Runs like New!
Did you find this story helpful?
Thank you for voting!

Poor power output, ran slow, excessive sparking, and hot smell

David from Sandy Spring, Maryland

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
N157129, N157123
0. Laid drill on left side
1. Removed several Torx screws from cover side of drill
2. Removed two Torx screws from motor shaft clamp
3. pulled out right hand brush and bracket, removed wire connector.
4. Gently eased motor and transmission units out as one assembly
5. Pulled out left hand brush and bracket, r emoved wire connector.
6. Connected and inserted left replacement brush assembly
7. cleaned copper contact surfaced with pencil eraser
7. Replaced motor/transmission assembly, careful to align notches
8. Connected and inserted right replacement brush assembly
9. tucked brush wires back into groove
10. replaced cover and reinstalled Torx screws
Did you find this story helpful?
Thank you for voting!

drill quit

Wanda from Temple, Texas

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Parts Used:
N157129, N157123
replaced brushes
Did you find this story helpful?
Thank you for voting!

brushes worn

Ralph from Riverside, California

0 of 1 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers
Parts Used:
N157129, N157123
took drill apart
removed motor and clutch
removed brushes and holder
installed new brushes and holder
installed motor and clutch carefully
make sure drill housing fits with a audible click
secured torque screws

Did you find this story helpful?
Thank you for voting!

Brushs arching badly on commutator..brushes were worn down and springs had lost their tension

Dale from Lynden, Washington

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Pliers
Parts Used:
N157129, N157123
Simply remove the Torx screws and separate the 2 halves of the drill. Then unplug electrical connection from each brush and then remove the brush holders from the drill with needle nose pliers. Place new brushes in the drill and reconnect the electrical wires.. Then join the 2 halves of the drill back together and reinstall and tighten th e Torx screws.

Note: Be careful when ordering your parts to place close attention to the shape of the brush holder, as the 2 brushes are different. in the Dewalt drill, and possibly many other brands..

The 2 things I like about replacement parts is the accuracy of the pictures of the parts on their site, and also their prices.
Did you find this story helpful?
Thank you for voting!
  • 1
  • 2

Model Cross Reference

This part works with the following models:
ERP Number: ERP10188793
Manufacturer Part Number: N157129
Brand Model Number Description
DeWALT DC720KA Cordless Drill - 18V Drill Driver
DeWALT DC720KA-AR Boring Machine - 18v Drill Driver
DeWALT DC725A Hammer Drill - 18V Hammer Drill Driver
DeWALT DC725B Hammer Drill - 18v Hammer Drill
DeWALT DC725K-2 Electric Drill - 18v 1/2 Comp Hamdril
DeWALT DC725KA Hammer Drill - 18v Hammer Drill Driver
DeWALT DC725VA Hammer Drill - 18v Hammer Drill
DeWALT DC730A Cordless Drill - 14.4V Drill Driver
DeWALT DC730KA Boring Machine - 14.4v Drill Driver
DeWALT DC742KA Cordless Drill - 12V Drill / Driver
DeWALT DC742VA Cordless Drill - 12V Drill / Driver
DeWALT DC820 Impact Driver - 18V Compact Impact Wrench
DeWALT DC820B Impact Driver - 18V Impact Wrench
DeWALT DC820KA Impact Driver - 18V Compact Impact Wrench
DeWALT DC820KA-BR Wrench - 18v Compact Impact Wrench
DeWALT DC822 Impact Driver - 18V Impact Wrench
DeWALT DC822KL Wrench - 18v Impact Wrench
DeWALT DC823 Impact Driver - 18V Impact Wrench
DeWALT DC823B Wrench - 18v Impact Wrench
DeWALT DC823KA Impact Driver - 18V Compact Impact Wrench
DeWALT DC825 Impact Driver - 18V Compact Impact Driver
DeWALT DC825B Impact Driver - 18V Impact Driver
DeWALT DC825KA Impact Driver - 18V Compact Impact Wrench
DeWALT DC827 Impact Driver - 18V Compact Impact Driver
DeWALT DC827KL Impact Driver - 18v Compact Impact Driver
DeWALT DC830 Impact Driver - 14.4V Impact Wrench
DeWALT DC830KA Impact Driver - 20443
DeWALT DC833KA Wrench - 14.4v Impact Wrench
DeWALT DC835 Impact Driver - 14.4V Impact Driver
DeWALT DC835KA Impact Driver - 20442