03-08-2022, 05:53 AM
Your plumbing to the AD 9 is correct in comparison to what I have. The other plumbing is different, but it has been working .
It seems like you may have two issues :
An intermittent leak somewhere .
Something preventing the system from building pressure.
My coach will leak down on the supply side overnight when mostly parked .
When on a trip the system will stay up , sometimes 3 days , so operation helps a valve somewhere that I have not found .
As your engine compressor is obviously working , I wonder if the governor is the problem . I don't believe in replacing parts until a problem is solved , but the governor is not a huge expense , so you might get a new one and try it.
Still , it seems everything was working prior to chasing the leaky pop off on the original dryer/heat exchanger .
Chris
It seems like you may have two issues :
An intermittent leak somewhere .
Something preventing the system from building pressure.
My coach will leak down on the supply side overnight when mostly parked .
When on a trip the system will stay up , sometimes 3 days , so operation helps a valve somewhere that I have not found .
As your engine compressor is obviously working , I wonder if the governor is the problem . I don't believe in replacing parts until a problem is solved , but the governor is not a huge expense , so you might get a new one and try it.
Still , it seems everything was working prior to chasing the leaky pop off on the original dryer/heat exchanger .
Chris
1986 #89
VIN 007
Detroit 8V92 TA 475 HP
Allison four speed
Chris and Sharon Hand