Both Gauges max out at the same pressure which is 150 Lbs. When turning the adjustment knob on Regulator to adjust correct outlet pressure for the air tools, both Gauges drop at same rate and to same level. Don't know if I can dismantle the Regulator and fix but I'd like to try if possible.
After repairs or just started doing it?
Regulator may be installed backwards or pressure gages in the wrong ports.
I hope you are not operating the compressor's cut off adjustment by mistake.
It seems like you might be adjusting a valve before the regulator. the outlet pressure from the compressor vessel should remain celatively constant. if you are adjusting the pressure whilst using the airtool and when you stop the regulator gauges return to/or close to/ the 150 PSI then this also points to you not adjusting the regulator.
Some compressors have 2 outlets... one regulated and the other not.
SOURCE: press. switch won't shut off motor when reaching cut-out pressure
IF THE SWITCH WILL NOT SHUT IT DOWN ITS NOT WIRED CORRECTLY, THE POINTS IN THE SWITCH ARE WELDED TOGETHER AND WONT RELEASE OR THE LINE UNDER THE SWITCH IS CLOGGED
SOURCE: tank will not build pressure beyond 25 lbs. Just runs
IS YOUR AIR FILTER CLOGGED. SOUNDS LIKE THE VALVES IN YOUR HEAD ARE NOT CLOSING ALL THE WAY. THEY ARE MOST LIKELY REED VALVES, THIN STRIPS OF METAL THAT OPEN AND CLOSE WHEN THE PISTON MOVES. MAKE SURE THEY ARE CLOSING ALL THE WAY (NOT CARBONED UP). DID YOU REMOVE THE HEAD AND DID YOU PUT BACK LIKE YOU FOUND IT - NOT TURNED OR FLIPPED OVER. SEE IF YOUR FINGER WILL GET SUCKED UP TO THE INTAKE HOLE.
SOURCE: craftsman 3 gal ari compressor low presure
put a blower on the hose and see if air comes out
very possible there is a blockage in the hose or if you are using quick connects they may have failed
SOURCE: Craftsman 30 Gal. 150 PSI Not building air over 45lbs
The compressor valve may have a faulty gasket or seal, and maybe leaking air internally. Or the compressor might be going downhill. You can try to replace the valve seal and see if that makes a difference, otherwise you need to replace the compressor.
SOURCE: Low air pressure
This sounds like it is either the pump is leaking from the piston or more commonly, the rubber seal that seals the outlet tube to the cylinder head blew out like mine. Let me guess, it got a lot louder than it was originally? The seals are readily available from sears parts direct, its like 3 bucks but shipping is around $8. Hope this helped
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