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Milwaukee Brush Replacement

E

Ed_McDonnell

Joined
Jul 18, 2006
Messages
643
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2
Location
Central Florida
The Milwaukee angle drill that I use for sanding must have gotten Christmas confused with the Fourth of July. It shot off all sorts of fireworks in the shop today.

My guess is one or more brushes are shot. I think I caught it before the motor got fried and would like to give brush replacement a try.

I had found a tutorial on the web a couple years ago and the only thing I remember is that there were one or more tricky steps in the disassembly / reassembly. Of course I saved a copy of the tutorial in a really safe place, wherever that is.

I can't seem to find anything on the web tonight. Anyone know of any tutorials on brush replacement for Milwaukee angle drills (0375-1 / 611B to be exact).

Ed
 
Last edited:
Thanks. I had found the Parts list earlier, but I somehow managed to not find the wiring diagram. I think with that I've got what I need to give it a go.

Ed
 
Bearing problem!

Ed, chances are your problem is a seized bearing. I have two of these drills and have changed out the bearings several times. The original bearings are NOT sealed and get clogged with dust and eventually fail. You can buy sealed bearings to replace the originals from Enco. The next problem you could have is that when the bearing fails, it could melt the plastic housing where the bearing resides which will cause it not to fit properly. What then happens is you will have lots of noise from the gears not meshing properly and will start wearing out other parts. I've totally rebuilt my drills and know every problem possibly. The one thing that has never failed are the brushes. They do wear but chances are that is not your problem.

Ed
 
I've had neither fail/wear out with over five years heavy use on one and two years on a second. I bought the second when I got tired of changing long to short shank or large to small sanding pads. I do periodically blow out the dust with my air compressor though. Started doing that to help motor cooling, but if the bearings aren't sealed, I'm helping that as well.
 
WaltBen - I blow out mine with compressed air after each use. I had hoped that would help with the dust problem. I've had it less than 2 years, but I turn almost every day and it has seen a lot of use.

Ed Koenig - I could see heavy sparking through the bottom vent holes (furthest from the chuck) and the motor was stuttering, which is what made me think it might be the brushes. But you're right, a frozen bearing might be the real problem.

Guess I better disassemble and inspect before I start buying parts.

Are there any special considerations in dis assembly / reassembly other than really paying attention to the wiring routing?

Ed
 
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