Compressor allows reservoir air past the rings

by Bruce Johnson
(Houston, Tx., USA)

compressor pump

The compressor pump on my compressor allows reservoir air past the rings.

I've been looking for info on this pump, for a while now, fairly certain that it is a 2 stage pump.

When I first tried to use the compressor assembly(I've been out of the country for six years), it took forever(over an hour) to build pressure(100psi). It's getting better at building pressure but will not hold it, reservoir air escapes past the rings.

I would like to overhaul it, but am unable, to this point, of determining a make and model #. Any help that you can furnish would be greatly appreciated. I would like to get a Maintenance/Overhaul manual and a parts illustrated manual, as well as the overhaul kit, if you have ideas on where to locate them that would be appreciated also. Thank you for your time and effort in this matter. Take care,

Bruce Johnson

Comments for Compressor allows reservoir air past the rings

Click here to add your own comments

Aug 08, 2017
by: Anonymous

This is a Champion R-15 pump. Sounds like you have a bad check valve in the tank and bad valves all around in the head.

Aug 03, 2017
Good that connections have been checked.. but
by: Bill

I asked the questions I did to help me diagnose the compressor issue. Good that you checked the connections, but did you check that the tank check valve is seating securely?

If air is coming out of the compressor when it's stopped, it's the tank check valve that's leaking.

I know that doesn't have anything to do with air generation, but it sure does once the compressor is stopped.

Aug 03, 2017
Compressor allows reservoir air past the rings
by: Bruce

the connections have been leak checked. The time that it was sitting, I felt that the rings had seized, and to support that theory, the fact that the time it takes to make pressure. I don't want to burn the pump up and as old as it is, it's surely due. When I tear into it the issue will present itself. I have determined that it is a Wayne pump and with no data plate and only cast markings(AC-4136) any help would be appreciated.

Aug 03, 2017
compressor pump reservoir air
by: Bill

I'm a bit confused by your comment.

Are you saying that air is blowing out of the reservoir when the compressor is stopped? If so, how do you know this?

Or, if air is blowing out past the piston rings while the compressor is running, same question, how did you identify this please?

Click here to add your own comments

Add your own question or comment. It's easy to do. How? Simply click here to return to Identifying An Older Air Compressor.