Hey everyone, I'm a newbie here. We have a 25' Bluebird transit style bus. It has air brakes, suspension and a kneeling feature.
The auxiliary air regulator valve tied to the kneeler starts dumping air once the front tank reaches exactly 70psi. I bought the rebuild kit(part #RN17Y) for the regulator valve but that didn't make any difference at all. The valve is rated for 20psi and is adjustable. I've tried different adjustments on the valve after installing the new o'rings, spring and diaphragm from the repair kit but it made no difference what so ever.
The bus starts, pressurizes the tanks up to 70psi, the hissing begins from the regulator valve, the compressor tries hard to outpace the air being dumped from the valve but only manages to climb about 0.5 psi per minute
Any tips from mechanics? I have a Hendrickson air system. The regulator valve I'm referring to can be found here:
OEM part# N15817A (What's currently installed)
Repair kit: Haldex part# RN17Y
Replacement part# KN31040