General Boards > Technical Support

2000 Marquis left front airbags

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Joel Ashley:
Sample reference pics:

Duane Kunze:
Thank you Joel for posting your experience and the link. I have inspected all of the linkages/ rubber hoses, etc. All seem good. Now what I am searching for is a step by step troubleshooting process for the valve. I cut some blocks to support the coach, but I cannot move either rear valve left or right. I have to be doing something wrong. Videos I have watched do not show how to manually move the linkage. Can someone explain the step by step process? Engine has to be running, air tanks empty? I’m lost.
Thanks

Steve Huber:
Duane,
Have you checked the height of the air bags on the left front as Carl suggested? They should be ~ 10" from the top of the bottom plate to bottom of the top plate. If it is lower than that adjust the left rear ride height valve as Eric suggested before you start chasing any other solutions. I'd check the right side bag measurements before adjusting and start by setting the left bags equal to the right side bags. You can then make any needed adjustments to finish leveling the front.
Why are you trying to move the valve? The adjustment is done by moving the rubber linkage (shown circled on Joel's photo. The air tanks need to be full but the engine does not need to be running. To make an adjustment simply loosen the screw in the band around the rubber linkage and move it slightly. IMPORTANT: be sure to hold the linkage in place while loosening the band. If the linkage slips it can cause the bags to deflate, resulting in the coach dropping quickly and crushing anything in its path.
Steve

Duane Kunze:
Hi Steve, yes , I have checked the measurement of the bags. The passenger front is about 10”, drivers front is about 8.5 “ I can definitely see a difference in how the bags are inflated. I have misunderstood how to manually operate the valve. I didn’t realize I needed to loosen and move the rod, I thought I could just turn the round portion of the valve where the rods connect. Now I think I understand. I want to check operation of valve to make sure it is working. Or maybe one of the 6 pack solenoids is bad? Thanks for your input. I appreciate it. If you have any other suggestions, I am wide open.

Steve Huber:
Duane,
The solenoids have no effect on the air leveling or ride height of your coach. It is completely controlled by the air bags.
Steve

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