60's vintage Mark VII

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AZWoodMachinest
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60's vintage Mark VII

Post 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?
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thunderbirdbat
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Re: 60's vintage Mark VII

Post 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.
Brenda

1998 510 upgraded to a 520, upgraded to power pro with double tilt and lift assist.
1998 bandsaw
2016 beltsander
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JPG
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Re: 60's vintage Mark VII

Post by JPG »

A likely suspect is the power switch which controls direction by switching the start circuit.
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10
E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
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rjent
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Re: 60's vintage Mark VII

Post by rjent »

Does it hum in both rotational directions?
Dick
1965 Mark VII S/N 407684
1951 10 ER S/N ER 44570 -- Reborn 9/16/14
1950 10 ER S/N ER 33479 Reborn July 2016
1950 10 ER S/N ER 39671
1951 jigsaw X 2
1951 !0 ER #3 in rebuild
500, Jointer, Bsaw, Bsander, Planer
2014 Mark 7 W/Lift assist - 14 4" Jointer - DC3300
And a plethora of small stuff .....

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AZWoodMachinest
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Re: 60's vintage Mark VII

Post by AZWoodMachinest »

rjent wrote:Does it hum in both rotational directions?
hums in both FWD and REV
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JPG
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Re: 60's vintage Mark VII

Post 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.
╔═══╗
╟JPG ╢
╚═══╝

Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10
E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
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