Ingersol Rand upright 5 HP motor buzzes

by Lee
(East Troy WI 531202)

When the compressor goes to start, motor busses and then blows breaker. If you take belt off motor runs fine. There is no pressure in the tank or on unloader valve?


Inersol Rand upright 5 HP 220 single phase. Last time it did this I replaced motor and it was fine, this motor is only 4 months old now it is doing the same thing.

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Sep 01, 2014
unloader
by: Doug in s.d.ca

A model might help....

but your check valve and unloader are probably part of or adjacent to the pressure switch.

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