Champion R15 stops at 30PSI no matter what

by James
(Yuba City, CA)

I recently received a free Champion pump from a friend. His father had it out in the weather and never maintained it. I brought it to my house, miraculously, and have started to play with it.


First, the Start breaker is awfully corroded, but somehow still works.

I had the motor rebuilt, and it load tests well.

I pulled apart and cleaned the head and valves.

All of this and it still pumps up to 20 psi, acts like its going up hill, and then stops at 30 PSI.

I didn't pull apart the oil pump, should I?

I disconnected the sensors entirely, to no avail, same results. Any thoughts? PLEASE?

Comments for Champion R15 stops at 30PSI no matter what

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Nov 17, 2015
Please respond to...
by: Bill

Is the compressor stopping because power stops flowing through the pressure switch, or, when the compressor is stopped, is power still flowing to the motor circuit?

Nov 17, 2015
Follow Up
by: James

I went through and cleaned the caps and included parts.

The springs seat the metal gaskets, so I think those are functioning well.

The Pressure switch was totally disconnected, trying to bypass it, if that was the problem, I still get the same issue.

Could it be an oil pump problem? Or there is a part I'm not sure what it is called, coming off the oil well and has electrical connectors that tie into the pressure switch. Is that an oil pressure switch?

Nov 16, 2015
Champion R15 stops at 30PSI
by: Bill

When it stops at 30 PSI, why is it stopping?

Is it because power stops flowing through the pressure switch, or, when it's stopped, is power still flowing to the motor circuit.

If the former it's likely the pressure switch at fault.

If the latter, then you've probably got a motor issue, and I'd look at the caps first.

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