cwk266
Well-Known Member
Hi can anyone point me in the right direction to diagnose a air pressure problem on a Hayes with a cummins compressor?The truck builds pressure to 60-70 psi only.I can hear air being pumped into the tanks till that pressure and then it stops.I am hearing no major air loss with the truck running or when I turn it off.When I pull the button to release the brakes the pressure drops and then builds again to the same pressure and stops.I have attached a pic of the compressor it is setup with the injection pump coming off the back side