[jcclark]

I have a 5hp Eaton 2-stage that "chirps" every
once in a while, I found one of the continuous run valves
sticking so I cleaned and lubed it, and it almost
went away completely. But still there a little.
Anyone here had one do that?

[oldred]

Not sure about the "chirp" sound but have you checked the drive belt? Squirt a little belt dressing on it and see what happens.

[jcclark]

Yea, the belt was my first suspiscion. I've ruled that out.
It has something to do with the valve, like I said, when I
cleaned it the chirp all but went away, before it used to do
it all the time. But it's gradually coming back.
I suspectthe unloader valve is seating properly, in the
continuous run mode it never chirps.

[oldred]

It is probably something minor but it should not be ignored. You could check with Eaton, their service is great to say the least and they do back their products.