DeWalt GWI Rebuild #1: Smoking motor?

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Blog entry by _Byron_ posted 10-04-2017 01:49 AM 446 reads 0 times favorited 2 comments Add to Favorites Watch
no previous part Part 1 of DeWalt GWI Rebuild series no next part

So this is what I’m starting with, a DeWalt GWI, 1.5HP motor.

Powers up with a bit of chatter in the relay, but nothing too bad. Spins smooth as silk.

Until… Smoke, oh no. After a few seconds a bit of smoke starts to emerge from the armature. It still spins strong and the breakers haven’t blown, so hopefully it’s not too bad. First task, get it open.

Getting the front of the case open wasn’t too difficult, a little bit of wiggling and it was free. But now…stuck.

The front bearing is stuck on the shaft (yep, I removed the c-clip). This prevents removing the fan and the fan prevents the armature from coming out the back of the case. Ok, so lets pull the armature out the front. No dice…the arbor appears stuck in the rear bearing which appears to be stuck in the rear cover plate.

Well fooey!

Time to see if the Misses has dinner ready while I contemplate how to proceed (or the Interwebz hears my cry for help and sends me some tips…hint, hint!).

2 comments so far

View tomd's profile


2134 posts in 3700 days

#1 posted 10-05-2017 04:24 AM

You just need a bearing puller to get it off the shaft. A little WD 40 will help too.

-- Tom D

View _Byron_'s profile


2 posts in 174 days

#2 posted 10-06-2017 10:34 PM

Well, a modified Harbor Freight pulley puller did the trick on the front bearing.

Although now I can’t see how to get the fan off and I’m afraid to try just pulling on it without knowing how it’s attached. And without taking the fan off I can’t see how to get to the rear bearing that is frozen up on the armature shaft.

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