Cp qrs 25 pressure

Question Title: Cp qrs 25 pressure
Asked by: Scott S. Rohrback
Asked On:
Answers: 1

I have a Chicago pneumatic QRS 25 that keeps going up and pressure until it shuts the machine off. I replaced the transducer I've replaced and rebuilt the inlet valve but it keeps shutting the machine off. It doesn't stop at 125psi. It goes way too high 150psi and shuts the compressor off...

Answers & Replies

Cas

4 years ago

Hi,

Did you also check the loading solenoid?

The loading solenoid controls the control air supply to the inlet valve.

Normally, on most machines, it works like this:

unload:

no power to solenoid
solenoid closed
no control air to inlet valve
inlet valve closed

Load:

power to solenoid
solenoid open
control air to inlet valve
inlet valve open

Please check this first, and let me know what you find :)

Thanks,
Cas