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DeWalt model 1400 radial arm saw motor won't turn

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Forum topic by mcoulton posted 11-12-2018 09:20 PM 227 views 0 times favorited 4 replies Add to Favorites Watch
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mcoulton

2 posts in 36 days


11-12-2018 09:20 PM

Topic tags/keywords: dewalt 1964 1400 motor

I bought a model 1400 DeWalt radial arm saw this weekend .

After using it for 45 minutes, smoke camo out of the box where the capacitors are located.

It no longer rubs or even hums when turns on, I hear a little click when the power is turned on.

The reset button is missing and all I see is a hole.

Is there a place to get the wiring diagram and the specs for all the parts to do a rebuild of the power box.

I like the saw because it as really heavy and there is no play when everything is locked down.

It would be cool to put in some DRO readouts on it


4 replies so far

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mpsprunger

27 posts in 2066 days


#1 posted 11-12-2018 11:38 PM

The box on top, probably contains a cap, and a potential relay. The relay opens when the energy from the turning rotor is enough to energize the coil in the relay. Then it switches to the run cap. Mine had a 3 hp motor, the fellows, at the shop, connected it to 220 the wrong way w/out using the magnetic contactor and burned up the start windings. it died

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MrUnix

7053 posts in 2404 days


#2 posted 11-12-2018 11:54 PM

Without any other info, you are probably not going to get more than guesses. Does the arbor spin freely when turned by hand? It could be a bad cap, which is easy to test with a multimeter in resistance mode… but it should not have fried in the middle of running. Doing so could be due to a faulty centrifugal switch stuck closed. IIRC, those models also have a blade brake, which may have malfunctioned… or you could have had a catastrophic bearing failure.

Too many possibilities, too little information. You are going to have to open it up and do a little diagnostics in order to narrow it down.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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mcoulton

2 posts in 36 days


#3 posted 11-13-2018 04:07 AM

i found that it tripped the gfi.

When i reset it , there is a humming when you hit the power but the motor does not spin.

i see that it has a mallory 200-240MFD 110 VAC

i am attaching a file

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Fred Hargis

5179 posts in 2699 days


#4 posted 11-13-2018 11:46 AM

You probably just need to replace the capacitor. Take that one with you to a motor shop (or industrial supply) and get a replacement. Should cost less than $20. Taking it with you is. good idea because some of them might be a little larger in size and not fit so snugly in the box.

-- Our village hasn't lost it's idiot, he was elected to congress.

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