LumberJocks

Dewalt 735 Planer Motor Stopped Working-Please Help

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by JCWoodworker posted 1359 days ago 5264 views 2 times favorited 23 replies Add to Favorites Watch
View JCWoodworker's profile

JCWoodworker

41 posts in 1359 days


1359 days ago

Topic tags/keywords: broken motor dewlt 735 planer question

Dewalt 735 Planer- 4 yrs old, motor stopped working, checked brushes and they are still good, just won’t turn back on. Any suggestions from any of you pros? Or is the Motor completely shot?

-- John Cahill


23 replies so far

View NBeener's profile

NBeener

4806 posts in 1773 days


#1 posted 1359 days ago

Circuit breaker tripped ??

Sorry. Have to ask the easy/silly question, first !

-- -- Neil

View JCWoodworker's profile

JCWoodworker

41 posts in 1359 days


#2 posted 1359 days ago

No..lol circuit is fine. was running and then just stopped

-- John Cahill

View NBeener's profile

NBeener

4806 posts in 1773 days


#3 posted 1359 days ago

Maybe this will help …. ??

http://support.dewalt.com/app/ask

-- -- Neil

View brtech's profile

brtech

664 posts in 1521 days


#4 posted 1359 days ago

Open it up and see if you can manually turn the motor shaft. It could be a mechanical jam, rather than a motor failure.

If it does turn, locate the wires going to the motor and disconnect them. Measure the resistance of the motor winding. If it’s infinite, bad.

View JCWoodworker's profile

JCWoodworker

41 posts in 1359 days


#5 posted 1359 days ago

brtech- The motor shaft does turn, going now to follow your wiring instruction..but what do you mean by “Measure the resistance of the motor winding. If it’s infinite, bad.”?

-- John Cahill

View ABQJohn's profile

ABQJohn

12 posts in 1459 days


#6 posted 1359 days ago

NBeener said “Circuit breaker tripped ??”

You said “lol circuit is fine”

Which makes me wonder if you are thinking of the wall outlet, I think NBeener meant is there a circuit breaker on the planer itself that could have tripped?

View NBeener's profile

NBeener

4806 posts in 1773 days


#7 posted 1359 days ago

That IS what I meant.

Sorry. Could have been clearer !

-- -- Neil

View JCWoodworker's profile

JCWoodworker

41 posts in 1359 days


#8 posted 1359 days ago

Just checked- motor shaft turns and has plenty of resistance, belt is fine, circuit on machine was not tripped, cleaned out all dust, still does not run…guess I will be planing by hand

-- John Cahill

View rance's profile

rance

4125 posts in 1759 days


#9 posted 1359 days ago

Measure the motor winding resistance with an ohm eater. .....Uh, I mean Ohm Meter. If you are asking, you’ll want to employ the assistance of a buddy for this. Or google “checking for an open circuit”.

“Has plenty of resistance” You don’t want ‘plenty’, you’re looking for a fairly low value.

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

View GaryL's profile

GaryL

1074 posts in 1429 days


#10 posted 1359 days ago

Maybe stick with Nbeeners’ approach, simple things first. Are you getting power to the motor? If not this eliminates motor, possibly. Check the switch with an ohm meter to be sure thats not the problem. I have more switch burnouts with power tools than any other problem.
Good luck.

-- Gary; Marysville, MI...Involve your children in your projects as much as possible, the return is priceless.

View JCWoodworker's profile

JCWoodworker

41 posts in 1359 days


#11 posted 1359 days ago

*Let me Correct myself also- The resistance is where it should be (not too much)...I don’t have an OHM Meter, but I also agree with GaryL, I also have had Switch Problems on all of my powertools in the past, so hoping that’s the only problem, tx for your help guys *

-- John Cahill

View alanealane's profile

alanealane

365 posts in 2489 days


#12 posted 1359 days ago

A new switch can be gotten at http://www.dewaltservicenet.com/Products/PartDetails.aspx?partid=52164

That’s what I’d guess is wrong. I’m still a little unclear on what happened. Were you planing some wood when the machine quit, or was it just running idle? Or did you shut it down and it wouldn’t work the next time you tried to power it up?

And even though the breaker on your shop’s power panel didn’t trip, maybe the wall outlet went bad. Check that with a simple 120/240 voltage tester that you can get a the hardware store for a low price. Put the tester’s probes into the wall outlet your planer runs on. If there’s voltage a light will come on in the tester to indicate 120V. Or simply try to run another power tool from the same outlet to test it.

-- Lane Custom Guitars and Basses

View JCWoodworker's profile

JCWoodworker

41 posts in 1359 days


#13 posted 1359 days ago

To Alanealane: I was Planing wood and then the machine quit. Wall outlet was checked and fine. Strange happenings here, been in business 30 yrs and always found out and fixed the problem when occured with a tool, this one is a mystery. I do have a 120/240 voltage tester So having my shopgirl check it out, this has taken way too much time away from a project that is due. Alanealane please respond with any other suggestions, you seem to have real grasp on these issues. Tx for the help

-- John Cahill

View alanealane's profile

alanealane

365 posts in 2489 days


#14 posted 1359 days ago

What type of wood were you planing, how wide was it, and how heavy of a cut were you taking? Did the machine really bog down during the cut or was it no worse than usual?

When you try to turn the machine on, is it completely silent, or does the motor hum like it’s stalled? If it hums, it may have a problem with a bearing (not likely) or the feedroller system. The rollers may be stuck/jammed and prevent the motor from turning on. Maybe even some gears in the gearbox jammed together. I’ve never worked with a DW735, but the design principle should be similar to my 733 planer, which I’ve had to do extensive repairs on in the past (out of warranty). I’m glad to give you a free troubleshooting session!! Too bad I can’t physically be there…

It may sound silly, but if your planer isn’t bolted down, you might give it a sharp hit with a rubber mallet or rock the machine back-and-forth with the power switch turned on. If there’s a freak loose wire, it may jump back in place and the machine may start…

I’m still hoping for your sake that it’s a switch problem (or something even simpler) and not a motor problem. A new armature (the part that the brushes connect to and cause current to flow through the coil wires) costs just over $100 from DeWalt Servicenet, and then someone has to do the work to replace it. Not fun…
But if one of those wires overheated the plastic insulation around it and it shorted to another wire in the coil winding, it’s pretty well toast and needs replacement.

For troubleshooting the switch, take a look at the following exploded diagram of your machine, and see if you can take the planer’s switch (part #63) off by removing the screws that hold it on. Diagram here.
Here’s where you will need a ohm meter, more commonly marketed as a multi-meter, which measures volts, ohms, and amps all in one unit (you probably already knew that, having been in the business 3 decades). Test the resistance (in ohms by default) of the switches contacts when it’s on/off. The meter should read “1.”, meaning infinite resistance when the switch is off. It should read “0.0” or some tiny decimal value when it’s ON, meaning nearly ZERO resistance. If the meter stays saying “1.” in either position, the switch is dead. I hope that’s as serious as it gets for your issue.

I’m heading to the shop now, so I’ll check back here later tonight to see if you’ve found a solution.
Take care!!
~~Alex

-- Lane Custom Guitars and Basses

View NBeener's profile

NBeener

4806 posts in 1773 days


#15 posted 1359 days ago

For that matter … thinking about my old Chevy … couldn’t you bypass the switch by using a heavy gauge jumper wire to cross the terminals ??

-- -- Neil

showing 1 through 15 of 23 replies

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase