Have Puma 60 gal vertical air compressor. Will not start. breaker was tripped. nudged it on and motor started but immediately quit as breaker tripped. Is it pressure switch or the motor? 230 amp

SOURCE: Compressor will not start

It is a good sign that the motor turns freely with and without air. That indicates that you have good bearings and that the intank check valve is in good condition. Next you should check the capacitors and the condition of the windings. Some motors have start and run capacitors and others only have run cap. Remove from the circuit and test with meter having cap. test setting. Most shops will test them for free. The cap should test within 95% of stated ( uf ) value. Replace as needed. Finally check that the flyball switch at rear inside of motor is functioning correctly. At rest, switch is at start winding, then a split second after start, it shifts to run winding. Check contacts are not stuck and that switch is working and lastly that the winding are the color of new penny. Good luck.

SOURCE: Electric Air compressor just hums then trips breaker.

usally there is a releaf valve that takes the pressure off the compressor while it is resting. If that pressure is not off when the drive piston starts the motor will overload and blow the the breaker or reset. Check for a releaf valve for when the unit has reached full pressure

SOURCE: Air compressor won't build pressure

If this unit has what appears to be a pipe with fins on it , you may have a ruptured inter-cooler which will be leaking where you stated.

SOURCE: compressor starts innitially,then when pressure

the start capacitor on the motor body is weak,the motor needs this component to over come the air pressure when cycling to re-build the low air pressure,change both the start and run capacitors when doing the start because the other run capacitor is just as old and it will soon fail

SOURCE: I have a PUMA air compressor that has been running

If you remove the fan belt and the motor runs without a load,

one of your motor capacitors is bad. some motors take one

capacitor, some take two. the capacitor is what helps the

the motor give that extra torque to run the compressor pump.

good luck!