07-24-2021, 04:39 PM
On our '86 the air horn plumbing including solenoid is in the overhead above steering wheel. I have yet to leak proof the coach , but I was able to minimize the leaks somewhat .
As Richard instructed me , the first thing is to educate yourself on how the systems work . The suspension can be bewildering with all the valving , hoses snaking into unknown areas , etc . And two systems that are involved, ride height and leveling when parked .
I used a cylinder leak down tester , the type used for diagnosing IC engines . Started at the line from the compressor and then broke it down into sections.
I think the initial leak was around 25 % , pretty significant. Biggest leak was the Low Air switch on one of the tanks . Smaller leaks at compression fittings on hoses between valving were hard to find.
I found another tank last year, hiding above a tank near the propane tank . ( wish I had a pit ! ).
BTW , some frame cross members are in the mix as well , more fittings , drain cocks , etc .
Does one of your tanks have an automatic drain ?
On our '86 the air horn plumbing including solenoid is in the overhead above steering wheel. I have yet to leak proof the coach , but I was able to minimize the leaks somewhat .
As Richard instructed me , the first thing is to educate yourself on how the systems work . The suspension can be bewildering with all the valving , hoses snaking into unknown areas , etc . And two systems that are involved, ride height and leveling when parked .
I used a cylinder leak down tester , the type used for diagnosing IC engines . Started at the line from the compressor and then broke it down into sections.
I think the initial leak was around 25 % , pretty significant. Biggest leak was the Low Air switch on one of the tanks . Smaller leaks at compression fittings on hoses between valving were hard to find.
I found another tank last year, hiding above a tank near the propane tank . ( wish I had a pit ! ).
BTW , some frame cross members are in the mix as well , more fittings , drain cocks , etc .
Does one of your tanks have an automatic drain ?
As Richard instructed me , the first thing is to educate yourself on how the systems work . The suspension can be bewildering with all the valving , hoses snaking into unknown areas , etc . And two systems that are involved, ride height and leveling when parked .
I used a cylinder leak down tester , the type used for diagnosing IC engines . Started at the line from the compressor and then broke it down into sections.
I think the initial leak was around 25 % , pretty significant. Biggest leak was the Low Air switch on one of the tanks . Smaller leaks at compression fittings on hoses between valving were hard to find.
I found another tank last year, hiding above a tank near the propane tank . ( wish I had a pit ! ).
BTW , some frame cross members are in the mix as well , more fittings , drain cocks , etc .
Does one of your tanks have an automatic drain ?
On our '86 the air horn plumbing including solenoid is in the overhead above steering wheel. I have yet to leak proof the coach , but I was able to minimize the leaks somewhat .
As Richard instructed me , the first thing is to educate yourself on how the systems work . The suspension can be bewildering with all the valving , hoses snaking into unknown areas , etc . And two systems that are involved, ride height and leveling when parked .
I used a cylinder leak down tester , the type used for diagnosing IC engines . Started at the line from the compressor and then broke it down into sections.
I think the initial leak was around 25 % , pretty significant. Biggest leak was the Low Air switch on one of the tanks . Smaller leaks at compression fittings on hoses between valving were hard to find.
I found another tank last year, hiding above a tank near the propane tank . ( wish I had a pit ! ).
BTW , some frame cross members are in the mix as well , more fittings , drain cocks , etc .
Does one of your tanks have an automatic drain ?
1986 #89
VIN 007
Detroit 8V92 TA 475 HP
Allison four speed
Chris and Sharon Hand