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Topic: Air system leak (Read 310 times) previous topic - next topic

Air system leak

After my last use of the coach, I noticed that there was an air hiss coming from behind the rear axle on the passenger side. I found the device in the picture was constantly leaking. What is this and what does it take to fix it?

Thanks for your help
Rick
Rick and Wendy Green
1998 U270 3600 The Coach Formerly known as Princess
Build# 5336
2007 Ford Explorer

Re: Air system leak

Reply #1 –
Possibly retarder accumulator Norgren valve?

Help Air leak from top of the transmission

See also

Air leak
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Air system leak

Reply #2 –
Not a real good pictures but It looks to me like the air dryer.  The purge valve is leaking.  Looking at the craters in the dirt it looks' like they are under the dryer when it pops after compress shuts off.

  Many posts on this subject.
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago

Re: Air system leak

Reply #4 –
Quote from: wolfe10 –
CORRECT!

The second topic I linked has several topics within it that show R&R plus some part numbers. 

Good photos in the PDF Dick S attached in this topic Replacing transmission retarder valve (split from What did you do to your coach)

Big Air Leak Hydraulic Accumulator

Mike's got a great write-up on cleaning/restoring the valve  Allison retarder air valve
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Air system leak

Reply #5 –
Thanks everyone. Called Foretravel and they have them in stock. One is on its way. (about $135}. I'll see about installing it next week.
Rick and Wendy Green
1998 U270 3600 The Coach Formerly known as Princess
Build# 5336
2007 Ford Explorer