Problem with 215/4 Motor

The motor on my 215 just started stalling in the middle of today’s run. I had switched off the motor during a pause in printing, and when I switched it back on again, it hummed but did not move. I was able to get it moving again by physically moving the belt from the motor pulley to the chain drive. Then the motor ran as normal. When it’s switched off, it takes a few seconds to stop turning, and the final turns end with a click/clack/snap sound. The snap also occurs when I get the motor fully moving again, like there is a clutch allowing movement that has to click into place. When switched off and then back on again, it sometimes appears as if the motor is trying to turn backward, but again, if I physically move the belt the right way, it will catch and then start turning on its own. It’s a Century Single Phase 1750 rpm motor that is kept regularly oiled, at least with the two visible oil cups. I have read that single phase motors can sometimes have a capacitor go out, which causes them to try to run backwards at startup. If this is my problem is it fixable? Thanks for any help.

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Eric Holub
15 years ago

Label the wires so you can re-connect them where they are now (with press unplugged or breaker off, of course). I don’t know how the motor is mounted or wired in, so I can’t suggest any other precautions. If it were a number 4 motor mount, I’d say leave the upper nuts in place, just remove the lower bolts so the motor can be returned to original position.

Eric Holub
15 years ago

Capacitor probably is the problem. It may be in a housing sticking out of the motor frame. The capacitor normally holds a charge, and should NOT be touched until it has been discharged. A professional motor repair place will be able to fix it. McKee & Strub here in San Francisco is recommended, if you are in this area.

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