Champion HR 10-12 Unloader valve leaks while running only

by Charles Price
(Mayfield, KY, United States)

Champion HR 10-12 air compressor 120gal. tank.


Unloaded valve starts leaking while filling up at about 50 psi. It continues to leak the whole time it runs. Have let it build up to just above 100 psi and when I turn it off the unloader valve quits leaking.

Tank holds pressure and could build on up if I let it run more.

Have changed both unloader valves.

If I clamp one unloader valve shut the other will leak. Have taken check valve apart and cleaned it seems to be functioning fine.

Can't figure it out.

Comments for Champion HR 10-12 Unloader valve leaks while running only

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Jan 04, 2019
Champion HR 10-12 unloader valve ?
by: Doug in s.d.ca.

Have you looked at the centrifugal unloader on the pump?

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