07-19-2021, 11:51 AM
what dean said is spot on. if both supply and brake go down the same time, then their is a leak and also a bad check valve between the two systems. that check valve is hard to get at on your so good thing it is operating correctly.
now you begin your air leak adventure. on yours, if the airbags are holding steady, then it is a search for the leak.
how fast does it leak down to zero? you should have a 120v air compressor up front somewhere. start using bubbles on the easiest to get at places. the compressor, any regulator/drain bowls, etc.
you have airhorns probably, air vacuum pump, air shifter for the tranny, air step cover perhaps, probably air slide for genny, etc.
just start looking
tom
now you begin your air leak adventure. on yours, if the airbags are holding steady, then it is a search for the leak.
how fast does it leak down to zero? you should have a 120v air compressor up front somewhere. start using bubbles on the easiest to get at places. the compressor, any regulator/drain bowls, etc.
you have airhorns probably, air vacuum pump, air shifter for the tranny, air step cover perhaps, probably air slide for genny, etc.
just start looking
tom
2014 Haulmark 40' Super C on Freightliner Cascadia ISX15 Easton 13 speed
Former Owner 1990 38' Newell Coach 236 8V92
Former Owner 1999 45'8" Newell Coach 526 Series 60
Former Owner 2002 45'8" Newell Coach 608 Series 60