HL410100 not building pressure past 25 psi

by Mark Armstrong
(Ottawa Ontario Canada)

Hi Bill,

I own a CH HL410100 1.3 HP 8 gallon air compressor. It won't go past 25 psi.

Originally I thought it was a check valve but when I disconnect the uploader tube to the pressure switch no pressure loss is coming from the check valve.

I've soaped things down to see if I had a significant leak but nothing.

I'm now thinking its either the piston rings or butterfly valve plate. When I pulled the cylinder the walls looked fine and no blow by (hoping its going show something if its a ring issue. When I put my thumb over the "T" easy start valve I'm not having much of an issue feeling like my thumb is being forced off.

When closing of the T-valve I experience a reduction of suction at the air inlet but relatively good suction when I'm not blocking off the valve.

What caused the failure was not shutting of the compressor at the end of the work day causing it to cycle off and on until someone returned.

Obviously it worked beyond its regular demands. But wondering what you think I should do first to fix the problem, piston rings. butterfly plate or both? Before I do the rings if need be what should the psi be at the cylinder discharge going into the T-valve? Any input would be great. Thanks


Comments for HL410100 not building pressure past 25 psi

Click here to add your own comments

Jul 03, 2017
Same compressor, same problem.
by: Rob Taylor

I found your answer whilst looking for parts for my compressor - identical problem.

My exhaust reed is snapped, and in pulling the head and valve plate off, the gaskets ripped so I also require those.

You most likely need this kit:

Aug 31, 2014
HL410100 not building pressure past 25 psi
by: Bill

Mark, from what you have posted, I would guess that you've got a gasket leak inside the pump that lets go at 25 HP.

If you feel that changing the valve plate is good, make sure you get a new gasket kit too.

I think that may do it.


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 Campbell Hausfeld Compressor Issues.