Air Brake/Suspension Air Leak

[Chonburiman]

I have a 98 HR Endeavor DP that has air brakes and air suspension. When I shut-down the engine and turn-off the ignition I can hear air escaping in the vicininity of the passenger front wheel area where I believe the wet tank and other tank(s) are located. I've checked for leaks by monitoring the air pressure gauge - no reduction in air pressure and wondered if anyone had any suggestions. I should add that when I'm driving around the brakes are fine and air pressure is always within acceptable limits.

[Chonburiman]

I have a 98 HR Endeavor DP that has air brakes and air suspension. When I shut-down the engine and turn-off the ignition I can hear air escaping in the vicininity of the passenger front wheel area where I believe the wet tank and other tank(s) are located. I've checked for leaks by monitoring the air pressure gauge - no reduction in air pressure and wondered if anyone had any suggestions. I should add that when I'm driving around the brakes are fine and air pressure is always within acceptable limits.

[georgetown350]

If applying foot pressure to the break pedal does not increase the leak then you are ok.

[Digital Boy]

Do you ever shut down and leave the air bags full? Do they deflate over several hours or a day?

If so, you have an air leak somewhere. The ride height valves might be leaking.

Otherwise, your air system might be just bleeding off excess air at shutdown.

[barrie elliot]

when you first stop this is normal for rigs that have air suspenions to have air escaping to help level and adjust

[Steve Rankin]

If neither gauge indicates a drop in air pressure, then you're just hearing some temporary venting & don't have a problem. If it was my coach, I'd want to know exactly what it is that's leaking the air though. A squirt bottle with soapy water and a flashlight are the tools of the day.

[quikduk]

I had this problem when we first got our DP. It has a Spartan Air-Ride chassis and as it turned out, all three leveling valves were bad and needed to be replaced.

I did this myself and after completing this fix, I adjusted the ride height properly. This made for a much improved ride. I also eventually had to rebuild the air dryer and the system now works as designed.

All of these are fairly easy if you have and can turn a wrench.

Just be sure you have the coach fully supported before you dump the air totally out of the system to change any defective air system components out or even get under the coach as you wouldn't want to BE a pancake.

FWIW, I prefer solid blocks under the tires rather than jack stands and the leveling jacks are down to reduce any wind sway while I am under the coach. I also chock the front wheels, have a phone within reach (cell phones do NOT work well under a coach) and have family ready to assist me.