Pacbrake PRXB barely working!
I upgraded to a Pacbrake PRXB 2 years ago. Worked great! I also installed a gauge on the dash to tell me how much back pressure I get. It usually reads about 58 lbs when braking.
Well, it all of a sudden started barely working? Only about 2-5 lbs backpressure?
The pneumatic cylinder is opening all the way, and I pulled it and bench tested it to make sure the butterfly was closing too.
I also checked that gauge, and it is accurate.
There is no apparent exhaust leak that I can detect, although I know a cracked manifold could cause this condition.
Any suggestions?
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2002 Diplomat
2017 F-150 Toad
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