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All Replies on DeWalt model 1400 radial arm saw motor won't turn

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DeWalt model 1400 radial arm saw motor won't turn

by mcoulton
posted 11-12-2018 09:20 PM


4 replies so far

View mpsprunger's profile

mpsprunger

33 posts in 2367 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

View MrUnix's profile (online now)

MrUnix

7478 posts in 2706 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

View mcoulton's profile

mcoulton

2 posts in 337 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

View Fred Hargis's profile

Fred Hargis

5739 posts in 3000 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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