Chasing air leak you can't find?
After replacing all ride height valves, pressure protection valves, and soaping every connection and device I could find, I STILL had a relatively fast air leak in the rear system. Long story short, in desperation I hired a short, wiry, young guy to replace my treadle valve and ALL its associated push-to-connect fittings. Five hour job. I virtually never hire anything done, but this project required more contortions than my 70 year old body could do. Itís a bitch of a job, but the young man got it done.
Air previously went from 120 PSI to near nothing in two hours. Now, it holds for days.
I have no idea whether it was the treadle valve or just a leaking fitting. I replaced it all since the job was such a booger I wasnít in the mood for experimenting. Braking performance was never an issue.
Van W 2000 Dynasty 36
ISC-350, pulling one Harley