Brush Holder Cap 643941-3

Repair Difficulty:

Easy

Time Spent Repairing:

Less than 15 minutes

Tools Used:

Screwdriver

Needed new brushes and new brush caps

Removed the brush caps with a screwdriver
Removed the old worn brushes
Installed the new brushes
Screwed on the new brush caps

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Tool Type:

Circular Saw

Parts Used:

Repair Difficulty:

Medium

Time Spent Repairing:

15-30 minutes

Tools Used:

Screwdriver

brushes burnt

remover case.
cut out old brushes
soldered in new wires
replaced side cover

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Tool Type:

Jig saw

Parts Used:

Brush Holder R - 643949-7

Brush Holder - 643815-8

Repair Difficulty:

Easy

Time Spent Repairing:

Less than 15 minutes

Tools Used:

Screwdriver, None

Brushes and holders were melted.

1. Opened up the casting removed the screws with Philips screwdriver.
2. Removed the parts to be replaced
3. Replaced with new parts
4. Tested the controls
5. Closed up the casing.
6. Double checked function
7. All done!

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Tool Type:

Circular Saw

Parts Used:

Repair Difficulty:

Hard

Time Spent Repairing:

30-60 minutes

Tools Used:

Screwdriver, Wire strippers, wire nut, sand paper, small flat head

Brushes and caps melted

1. Take off saw housing
2. Unscrew light
3
4. Disassemble handle
5. Pull light out
6. Pull brush holder wires out. Follow them
And disconnect. Negative line cut, positive line unscrew from trigger. Reinstall new ones.
Wire nut needed for negative line. Be careful taking body apart. Keep note of where spring goes for trigger.

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Tool Type:

Circular Saw

Parts Used:

Repair Difficulty:

Easy

Time Spent Repairing:

30-60 minutes

Tools Used:

Screwdriver, Electrical Tape

Overheated/melted brush holders on Makita 18v circular saw

Could not remove brush caps (fused to holder). Removed end motor trim cap, removed half of the handle to expose wiring. Thought I had to take whole motor apart to install new brush holder, but found out that I could remove brush holder just by wiggling wire through motor (had to tape a wire to wires so when I pulled old brush holder through motor, I could reverse process to install new brush holder). Just watch out for any springs in trigger assembly.

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Tool Type:

Circular Saw

Parts Used:

Repair Difficulty:

Easy

Time Spent Repairing:

15-30 minutes

Tools Used:

Screwdriver, Pliers

Saw smoked and stopped working

Removed cover, disconnected caps, brushes and holders, replaced with new parts.
Much easier then expected and saw functions like new.

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Tool Type:

Circular Saw

Parts Used:

Safety Cover - 419280-1

Repair Difficulty:

Medium

Time Spent Repairing:

30-60 minutes

Tools Used:

Screwdriver, Pliers, Wire strippers

Positive brush housing melted due to heavy work load.

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Tool Type:

Circular Saw

Parts Used:

Repair Difficulty:

Easy

Time Spent Repairing:

15-30 minutes

Tools Used:

, Phillips screwdriver, wire stripper and small screwdriver

My saw was borrowed so I'm not sure the symptoms. I do know the brush holders, the brushes and the caps melted all together to the casing.

My saw was borrowed so I'm not sure the symptoms. I do know the brush holders, the brushes and the caps melted all together to the casing. Being the casing is harder than surrounding, it was relatively easy to pull apart. I removed all Phillips screws in order to separate the casing to access end connection of the brush holders. Unscrewed red wire and replaced with new. I removed the wire crimp tying together the black wires, replaced with new brush holder black wire. Put everything back together and tested. Success!

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Tool Type:

Circular Saw

Parts Used:

Repair Difficulty:

Easy

Time Spent Repairing:

30-60 minutes

Tools Used:

Screwdriver, Solder , and iron

Did not work

Burnt the brushes. Removed the brush caps, then removed the brushes. Cleaned the brush holders with compressed air. Then inserted the new brushes and installed the new brush caps. Works like new

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Tool Type:

Reciprocating Saw

Parts Used: