Problems with my DeWalt planer- please help!

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Forum topic by Peter5 posted 12-14-2010 10:19 PM 6768 views 0 times favorited 8 replies Add to Favorites Watch
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66 posts in 3001 days

12-14-2010 10:19 PM

I bought a DeWalt planer second hand and it seemed to work great at first but eventually started overheating. I checked the blades and realized they were dull, so I put brand new blades on. It worked OK for a while before shutting down completely (wouldn’t start up). I noticed that the brushes were blown out, so I ordered new ones and put them in. With the new brushes it started right up, I took about 6 passes on a piece of rosewood and it died again. I pulled out the brushes and, just from those 6 passes, the brushes were completely blown out again. Am I doing something wrong? What could cause brand new brushes to blow out so quickly? Also, it was making sparks (the sparks were actually flying out as I was using it)- does that help explain anything? Lastly, is it worthwhile to take it to a DeWalt service center and have them repair it, or would it be better to just buy a new one? Thanks in advance for your advice.

-- Pete, Long Beach, CA

8 replies so far

View TheDane's profile


5545 posts in 3861 days

#1 posted 12-14-2010 11:01 PM

Pete—I don’t think it is you or anything you are doing wrong. Sounds like you have a bad motor.

Which model is this (DW733, DW734, or DW735)? If it is a 733, it might not be worth repairing.

Have you contacted DeWalt about the problem?


-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View rance's profile


4266 posts in 3358 days

#2 posted 12-14-2010 11:12 PM

Your motor armature is eating the brushes. Most likely needs to be replaced, as opposed to repaired.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View Peter5's profile


66 posts in 3001 days

#3 posted 12-15-2010 07:28 AM

Thanks guys. I’m going to look into getting a new motor armature- is that something I can replace myself?

-- Pete, Long Beach, CA

View GFYS's profile


711 posts in 3668 days

#4 posted 12-15-2010 07:54 AM

inspect the commutator …the multi-sectioned part the brushes ride upon.

View rance's profile


4266 posts in 3358 days

#5 posted 12-20-2010 11:00 PM

Dan is right. Here’s a picture :

See the blackened ring? That’s what’s most likely eating your brushes.

If you have a lathe(yes, even a wood lathe), you could possibly mount the armature on your lathe(commutator to the left for more rigidity). Then VERY CAREFULLY, scrape away the burned part of the commutator till you are down to smooth Brass(or Copper). Then a delicate swipe with 120 grit or so(very lightly here). This may get you back in bidness.

BE WEWEY CAREFUL TO NOT BREAK THE WIRES CONNECTED TO THE COMMUTATOR ELEMENTS. Also, don’t try this if you are not proficient with turning.

As for replacing the armature yourself, if you’ve ever taken a motor apart(that has brushes) and successfully reassembled it, then you’d probably do ok.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View TopamaxSurvivor's profile


18387 posts in 3873 days

#6 posted 12-21-2010 09:13 AM

use emery cloth, not sandpaper on electrical parts.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Peter5's profile


66 posts in 3001 days

#7 posted 12-22-2010 08:41 AM

Thanks everyone, when things slow down in my shop I’ll try to get the commutator on my lathe and see how it goes. I really appreciate the input.

-- Pete, Long Beach, CA

View GrenenstalNL's profile


1 post in 1160 days

#8 posted 10-07-2015 08:46 AM


I’m curious if Peter5 ever got round to getting the commutator from the housing. We ran into the same problem here in Holland, with a DW733 that lost a chip of the brushes. We are trying to remove the commutator from it’s housing but we can’t find a decent way to remove the pulley from the commutator’s axle. Removing the pulley is neccessary if one wants to be able to remove the commutator from the housing. The free end of the commutator is not readily suitable for applying great pressure. Nor is there any free axle space for clamping on the pulleyside.

I have been able to find out the pulley is left threaded, the parts list of dewalt mentions this.

It there anyone here who has managed to do so? And if so: what’s the trick?

EDIT: In the meantime my father has managed to remove the pulley. The pointer of the thread being LH and, despite my feelings about applying pressure to the gear on the other side of the commutator, putting the other end in the vise with the use of aluminum plates, has helped him enough to solve the problem.

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