Poly V Belt does not turn

redsman · Post by **redsman** » Sat Jan 28, 2012 2:54 pm

I have a 30+ year old Mark V that I am attempting to use again. It's been about 8 years since it has seen any wood.
I turned it on and it does not turn the drive shaft.
I disconnected the drive belt and the motor runs great.
I cleaned and lubricated per the video and following the procedures as outlined in the manual.
With the drive belt off, the shaft driven by the Poly V belt turns great. I reattach the drive belt and at this point, nothing runs.
I am open to any and all solutions.
Thanks for your assistance,
Redsman

wa2crk · Post by **wa2crk** » Sat Jan 28, 2012 3:40 pm

Redsman;
If you mean that you can turn the Poly V Belt shafts by hand I assume that you are using something like the sanding disc to turn the shaft. If you put everything back try to turn the main spindle by hand with the sanding disc attached. If the shaft is difficult to turn then the V belt (not poly) may be riding too low in one of the sheaves and binding. Turn the sanding disc and try to move the speed control to a midrange speed while turning the disc. After you are in a midrange speed try to restart the machine, if all is OK it should run. If the motor only hums then something is binding and should be corrected.
Come back for more guidance. Someone here will be able to talk you through the problem.
Bill V

redsman · Post by **redsman** » Sat Jan 28, 2012 4:02 pm

Great advice!!, and Thanks!
I tried your suggestion and it enabled it to run.
I turned it off, waited for it to come to a complete halt, then restarted it.
In order to get it to run again, I had to use the sanding disc to coax it along. I turned the speed dial to mid range again and the motor began to run like it should.

Any additional advice is greatly appreciated.

Redsman

dusty · Post by **dusty** » Sat Jan 28, 2012 6:08 pm

redsman wrote:Great advice!!, and Thanks!
I tried your suggestion and it enabled it to run.
I turned it off, waited for it to come to a complete halt, then restarted it.
In order to get it to run again, I had to use the sanding disc to coax it along. I turned the speed dial to mid range again and the motor began to run like it should.

Any additional advice is greatly appreciated.

Redsman

Turn it off, open it up, clean it out, and lubricate everything that is suppose to be lubricated (especially the sheaves). Once you get it running, let it run for five or ten minutes to flex those belts. They tend to stiffen up when not used (sorta like me).

The good news is that the motor runs and all the shafts turn.

JPG · Post by **JPG** » Sat Jan 28, 2012 11:19 pm

The sanding disc acts like a flywheel and therefore slows down a power up sequence.

If 30+ years means a 3/4 hp motor, then standard procedure is to ALWAYS start/stop with the speed set to slow.

beeg · Post by **beeg** » Sat Jan 28, 2012 11:49 pm

JPG40504 wrote:If 30+ years means a 3/4 hp motor, then standard procedure is to ALWAYS start/stop with the speed set to slow.

My 31+ year old SS doesn't have a 3/4 hp motor.

JPG · Post by **JPG** » Sun Jan 29, 2012 12:08 am

beeg wrote:My 31+ year old SS doesn't have a 3/4 hp motor.

That would depend on how big yer "+" is!;)

My 30+ yr old Goldie is almost a half century old. It was one of the earlier 1 1/8 hp models(at least I thought so until yesterday!!!

).

FWIW, if the floating sheave is not providing adequate tension on the motor belt, starting up made be slipping. A loose poly-v belt will do the same thing.

If it has a poly-v(original), then it ain't a 3/4hp motor.

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Poly V Belt does not turn

Poly V Belt does not turn

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