General Boards > Technical Support

Air Leak in 1999 Contessa on Drivers side only

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Mike Gineris:
I have a slow air leak somewhere that causes the coach to loose air to the bags on only the drivers side.  It takes about one day for it to bleed out and the coach to dramatically lean.  Advice on where to go first on this?

Eric Maclean Co-Admin:
Mike
The right and left rear air bag sets each have there own ride height valves your leak would be in the effected side. a leak at the ride height valve or one of the connections to it or that sides air bags
Dish soap and water make an excellent solution to spray on all the air lines and fittings ( look for bubbles)
It is possible to have a leaking air bag but that's not as common as one might think although it is a 22 year old coach it is possible.
If you have an air leveling system there is another valve set involved called a six pack named for its six solenoid valves mounted on its aluminum base these solenoids have O rings which can be the source of your leak as well but this is only if your coach is equipped with an HWH air leveling system.

Be careful under the coach it is best to have it on rams or blocks to avoid being crushed in the event of a sudden air lose of air to the air bags.

Most common leaks are at fittings office height valve
Hope this helps
Eric

Mike Gineris:
The Air Dump switch doesn't work either.  I imagine it's a separate issue.  Thanks for the advice.  Is it OK to drive up on blocks and then bleed the air out using the two valves use to bleed water from the tanks?

Eric Maclean Co-Admin:
Mike
You want to look for leaks with the system aired up.

Your dump switch should only work with the key in the accessory position .
And if your coach is like mine there are manual shut off valves at each of the dump solenoids which if they are turned off prevent the solenoids from dumping the air ( I mention this because mine had been shut off went I got the coach)

The dump valves 4 in total are mounted  high on the frame cross members two for the front on the cross members ahead of the fuel tank behind the gen set. And two on the cross members ahead of the rear axle for the rears.

Steve Huber:
Mike,
First place you may want to check is the level control for the left rear. It will be on the left side inboard from the left rear wheels. Be sure to brace the coach up with hard wood blocks or a substantial hydraulic jack before working under the coach.
Steve

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