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60's vintage Mark VII
Posted: Sun Jan 26, 2020 6:43 pm
by AZWoodMachinest
motor will not start now. just hums when power it switched on. speed was turned down prior to shutting off. I am not sure if the problem is the capacitor or the relay. I can look up the test for the capacitor, but I do not know how to test the relay other than replacement(expensive). the relay was replaced once a couple of years ago.
any thoughts?
Re: 60's vintage Mark VII
Posted: Sun Jan 26, 2020 6:59 pm
by thunderbirdbat
Try cleaning or blowing the saw dust out of the motor. There may be saw dust in the way of the centrifugal switch.
Re: 60's vintage Mark VII
Posted: Sun Jan 26, 2020 10:27 pm
by JPG
A likely suspect is the power switch which controls direction by switching the start circuit.
Re: 60's vintage Mark VII
Posted: Sun Jan 26, 2020 11:23 pm
by rjent
Does it hum in both rotational directions?
Re: 60's vintage Mark VII
Posted: Mon Jan 27, 2020 12:39 pm
by AZWoodMachinest
rjent wrote:Does it hum in both rotational directions?
hums in both FWD and REV
Re: 60's vintage Mark VII
Posted: Mon Jan 27, 2020 8:16 pm
by JPG
AZWoodMachinest wrote:rjent wrote:Does it hum in both rotational directions?
hums in both FWD and REV
Which indicates the start circuit itself(or power switch) is not functioning correctly.
Time for some continuity checks.