5hp Quincy air compressor frozen

by Richard
(Holland Michigan Ottawa)

5hp reciprocating Quincy air compressor circa 1960's with 220v two stage motor.

Motor is fine.

Flywheel doesn't turn (frozen) thus nor do piston. Just hum.

Both belts seem ok.

Have checked oil, open compressor all seems ok in terms of lubrication, checked air filter and cleaned.

Any thoughts on cause of problem would be appreciated.

thank you

Comments for 5hp Quincy air compressor frozen

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Jul 08, 2015
by: Doug in s.d.ca

Please answer my previous question.

Jul 08, 2015
by: Bill

We need more information, Richard. As Doug points out, what is the history, how old, is this a new problem?

You say the motor is fine... yet it's humming. I take it you've disconnected the motor shaft from the pump drive and it's OK?

Jul 08, 2015
by: richard

wondering what cause of frozen flywheel?

Jun 12, 2015
by: Doug in s.d.ca

What is the history? Been sitting or working?

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