Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 14, 2025 ...

Best way to dump air?

April 15, 2014, 03:04:21 pm

I am getting ready to replace my Haldex air dryer with a rebuilt unit from NAPA.
What is the best way to dump the air? I searched for it and the best I could find was using the drain cocks on the tanks. Is that it?
Is it ok to set the coach on the safety supports so I can still have access under the coach?

Quote Selected

Re: Best way to dump air?

Reply #1 – April 15, 2014, 03:49:13 pm

On my 1995 there is a air system drain petcock on the driver's side just in front of the drive tire.  Set coach up, turn air leveling system off, place supports and dump the air system.  I do not think the air bags will be vented so I believe the coach will sit where you leave it.

I do place my supports if I go under for any reason.

Quote Selected

Re: Best way to dump air?

Reply #2 – April 15, 2014, 03:52:39 pm

Wot Rudy said!  Plus it's always a good idea to just crack open any compressed air connection as a precaution to see if the system still has pressure.

Keith

Quote Selected

Re: Best way to dump air?

Reply #3 – April 15, 2014, 06:29:42 pm

On my 1993 U300, the valve in front of the left rear tire is for the wet tank ONLY.
It does dump pressure in the wet tank, no air pressure should be present @ the input to the wet , but the front tanks ( and all systems )are still pressurized.

My old '93 is my only knowledge, "just saying" I believe is the expression.

Quote Selected

Re: Best way to dump air?

Reply #4 – April 15, 2014, 08:49:54 pm

Thanks for the input.
Yes, I had to individually drain the 3 tanks. I had zero air pressure when I cracked open the big air line at the dryer.  Mr. Chaplin nailed it, just saying.

Quote Selected

Re: Best way to dump air?

Reply #5 – April 16, 2014, 10:36:40 am

You could pump the brakes to use up the air and exercise the brake slide pins at the same time.

Quote Selected