Question about Hitachi EC89 4 Gallon Twin Stack Air Compressor
Compressor runs and makes air but will not fill tanks with air
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Posted on Jan 02, 2017
hi your problem could lie in one of two areas
1/your unloader valve is stuck in the unload position
2/ your valves in the compressor pump head have broken and need renewal
hope that this is helpfull any further do not hesitate to contact
Posted on Dec 29, 2008
This compressor is small however like other brands in this size range draw 13 - 15 amps. Thats quite a bit of power. The compressor has a thermal breaker that will begin to trip if compressor is hot. I am assuming that the breaker that is tripping is the one on the compessor. I have seen many hitachi breakers fail. Easy to replace with generic 20 amp, cost about $10. Before you replace anything, check amp draw with meter, if within specs try to determine what is causing heat.
cycling too many times per hour (check manual for recommended)
low power due to weak circuit or extension cord
using generator for powering compressor (not recommended)
using low quality oil (use synthetic if hot climate)
air leaking from intank checkvalve back to pump
If no reason to overheat then replace breaker on compressor to 20 amp but watch for overheating. Good luck
Posted on Jul 10, 2010
Take the knob off there is a spring in it with a black plastic part. Most likly this is broken, look for it on eBay.this piece pushes in and opens the regulator.
Posted on Apr 13, 2013
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