[Gem930]

I wanted to troubleshoot a ride height issue I have been having with "new to me" coach #639. The left rear of the coach only cames to ride height occassionally.  Since my muffler has seen better days (yet another job) I decided shop air might be a better option rather than upsetting my neighbors running the engine for air.  There are two air chucks in the right side engine bay.  The front one appears to be connect to a regulator, but has no air at all.  The rear one had pressure then the engine was running so I thought it was the correct place to connect shop air.  Prior to connecting the air line I ran the coach enginge unitl to brake and source tanks read 120 psi.  Then, prior to connecting the shop air I connected a pressure gauge to the rear chuck and verified there was 120 psi.  Since there was, I was unconcerned about connecting shop air.  I set the shop air regulator to 120 psi, verified it with the same pressure gauge and connected it up.  I made my way around to the left rear axle and heard and new sound.... a large air leak coming from the slide seal directly above the wheel well.  Did I pop the seal? 
  
I disconnected the air and the system completely bled down withen an few minutes.  I pinned the door closed with a stick, walked into my house and made a stiff drink.  

Any ideas?


Gregg