I have an iron force oil less compressor, it slowly stopped building up pressure ( down to 25 psi ) . I replaced the piston and sleeve. ( the ring was worn out ) Now it will only build up 50 psi and keeps running - any ideas ?
Clean or replace your check valves.
SOURCE: wont build pressure over 25 psi after rebuild
sounds like the belt is slipping have you checked the inlet and discharge valves also could be bad and leaking or stuck or installed wrong
SOURCE: Mastercraft 2.0 hp air compressor will not build up over 25 psi
sounds like a bad or broken valves in the head. crankcase needs a vent which is sometimes a small hole drilled into the oil fill plug and will normally blow some air out the vent while it runs
SOURCE: wont build pressure after rebuild
check valve plate and gasket for anything broken, also when you installed the piston into the cylinder did you push it up from the bottom? if the sealing ring is installed with it folded down towards the crankshaft will allow air to blowby, it needs to be facing up to pump correctly.
SOURCE: pressure in the tank only builds to 30 psi
Bad check valve. But I would check the regulator, by turning it down to about 10 PSI and running it and see if it builds again, if that works then it is the check valve. But from what you are saying I would replace the check valve anyways.
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