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Problems with my DeWalt planer- please help!

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Forum topic by Peter5 posted 12-14-2010 10:19 PM 2126 views 0 times favorited 7 replies Add to Favorites Watch
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Peter5

61 posts in 1457 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 http://www.furniturebypete.blogspot.com


7 replies so far

View TheDane's profile

TheDane

3779 posts in 2317 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

-- 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

rance

4132 posts in 1814 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

Peter5

61 posts in 1457 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 http://www.furniturebypete.blogspot.com

View GFYS's profile

GFYS

711 posts in 2124 days


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

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

View rance's profile

rance

4132 posts in 1814 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

TopamaxSurvivor

14745 posts in 2329 days


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

use emery cloth, not sandpaper on electrical parts.

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

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Peter5

61 posts in 1457 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 http://www.furniturebypete.blogspot.com

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