Craftsman 1 HP 8 gal vertical compressor.
it builds initial pressure and will cycle one time after intial pressure build up. after that it will hesitate and trip the breaker. unplug it for a while and come back and it will work, cycle to fill tank and then cycle again once after pressure goes down, then it just trips the breaker.
any help would be great, thanks!
Sounds like the unloader valve is not working properly. The unloader typically is at the end of a tube going to the pressure switch. The unloader is tripped when the pressure switch cuts off. The purpose of the unloader is to bleed the pressure from the cylinder when the compressor cuts off so the next time the compressor cuts on it will be starting in an unloaded condition.
when the compressor cuts off you should hear a discharge of air for about 3 to 5 seconds if the switch is working properly. The unloader can be adjusted if necessary by loosening the jam nuts and adjusting the unloader towards the lever on the pressure switch.
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