Compressors have back check valves that allow the compressing
pistons to push air to the tank, but prevent tank air from pushing
back on the pistons. I suspect you have a bad check valve. They
are usually on the tank where the line enters from the top of the
One simple check: remove the line from the compressor head, turn
on the system, plug the outlet of the head with your thumb. If
the compressor makes enough pressure to push your thumb off with
no strange noises it would indicate the rest of the system to be
alright and a check valve problem. Replace it rather than try to
clean or service it. Usual cost about 10 to 20 dollars. If you
are not making good air, the reeds may need to be replaced.
Another fairly simple project with low cost.
I assume this is/was a well functioning unit. We acquired one
that was really stumping us. Turns out someone had changed leads
in the motor that were not correct for either 110 or 220 wiring.
It would run, but couldn't get over 25 pounds. Corrected the
wiring and it was fine. It was amazing that the motor had not
been destroyed and that anyone would mess inside the motor without
knowing what they were doing.
Keep the whole world singing . . . .
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