TANK CHECK VALVE

by DAVID
(WATERTOWN SD USA)

I PURCHASED A USED 1964 KARGARD MODEL 331TV, SERIAL N491906.
DOES THIS HAVE A CK VALVE AT TANK OR WOULD IT HAVE SOMETHING IN HEAD?
PUMPS GREAT , BUT AFTER SHUTDOWN WILL LEAK AIR BACK.
THANKS DAVE

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Bill says...

Dave, I don't know the compressor myself, though I expect that someone out there that does will comment too.

You say "BUT AFTER SHUTDOWN WILL LEAK AIR BACK." It would be good to know where that air is leaking from. If it is the unloader valve, then you either don't have a check valve (hardly reasonable) or the one you do have is not working.

Look where the fitting from the pump enters the tank. That's where the tank check valve is normally located. With the compressor off, and air drained completely from the tank, disassemble this fitting and clean the check valve, as I suspect that's all the problem is.

Cheers,

Bill