slows way down after building pressure

by ryan
(berne, NY, USA)

Runs fast and normoal up to around 130 or so psi, then it really starts slowing down and laboring to build pressure up to the cutoff of 175psi.


I already changed the run capacitors.

The electric motor is not getting hot or tripping breakers so it seems to me the pump is dragging it down.

Also pulled the large and small copper lines off the check valve on the tank and there was no air leakage. So I believe it is good?

When running if I pull the small copper line off the check valve at the tank it has constant air pressure going back to the unloader valve on the side of the pump.

I replaced the needle valve in the unloader due to it being broken but problem still exists.

The unloader does bleed air off the pump when it stops running for a few seconds then no leaks.

I do not know where to look next for this issue. Always ran good and strong to 175psi until maybe a few months ago. Hopefully someone might know more on this?
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Intake filter clean, Ryan?

Bill

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Oct 19, 2015
Did you get it fixed?
by: Anonymous

Have the same problem with my compressor. How did you fix yours? Thanks for any help.

Apr 07, 2012
Slows down
by: Buster

Assuming it is belt driven, have you checked the belt tension?

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Model 4B227E trips breaker occasionally

by trevor
(Alberta)

We have a 4B227E that is used to supply control air for the building HVAC system. It runs approximately every half hour. About once a month it decides to trip the breaker. Motor and compressor appear to turn freely, and current draw is normal. Any ideas?
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A host of issues could cause this, Trevor, not the least of which is a set of circumstances in the power supply that occurs once a month, trips out the compressor, and then doesn't happen again for another month.

Is the power to the compressor clean, with no other devices pulling power at the same time that the air compressor is trying to start?

See how tough this one is? You need to know the circumstances in the compressor system when the breaker trips, and without that, it's pretty hard to even guess.

Cheers,

Bill

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