Bostitch 4 Gallon CAP2040 Won't Build Pressure After Fix
4 Gallon Pancake Oil Free Air Compressor keeps running. It would not build beyond 20 PSI. Does not shut off.
Opened it up and saw one of the reeds/flapper on valve plate was broken off.
I replaced the Valve Plate Assembly, reed and also the Intake Valve.
All the other parts look great.(Gaskets, cylinder, piston ring, little air filter and head)
It now will build to 50 PSI and keeps running. If I come back 2 days later, it still has 50 PSI inside tank. Its not leaking at all.
I have disconnected nylon tube (Bleeder tube?) from tank port/check Valve and no air escapes out of tank.
I also disconnected outlet tube on both ends and no air escapes. Both of these tubes can be disconnected for days and no pressure loss in tank.
What else is there to check for why its not building pressure beyond 50 psi.
I also have made sure it is plugged directly into a 20 amp outlet for full power supply.
Pressure reducer valve is tightened all the way.
I have read everywhere on this site and all the problems seems to be reeds/valves, gasket or air leaks for why there is no pressure being built. None of these are my problems. Thank you for your time.