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2000 Marquis left front airbags

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Eric Maclean Co-Admin:
Duane
Have you checked the ride height on the rear
The system only uses a single ride height valve for the front axle which means that all the front air bags are tied together and the coach can lean to one side of the other this avoids twisting the frame .
If the driver's side front is low 8.5" apposed to 10" where it should be then one of three things is wrong .
1) the coach is not on level ground
2) the driver's side rear ride height is low ( should be 10" )
3) the passenger side rear ride height is set too high (should be 10" )
Remember this system is essentially a three point leveling system as the front of the coach can pivot or tilt of the center line moving air from one side air bags to the other if the rear ride height is not set at the same height the fronts will not be right either.

There is a fourth possibility
It is possible you have one or more front torque rods seized not allowing the suspension to come up to ride height , these torque rods have a spherical ball end on each end and with age the rubber seals deteriorate and allow dirt and water into the joint causing them to rust and seize.
One of the symptoms of sized torque rods is a squeak or grown when dumping the air bags.

Maybe dumping the suspension air and letting it come back up to ride height several times might free a tight torque rod ( or not)

There is a section in coach assist on servicing the torque rods if your interested.

Hope this helps
Eric

Duane Kunze:
Hi Eric, sorry for the late reply, I have been trying to adjust this ride height all day. I adjusted both rear height valve linkage. I have not adjusted the front middle valve linkage. These are the bag measurements I ended up with.Driver front = 8.5
Driver rear 9.75. Passenger front 9.0, passenger rear 9.5.
Couple questions, are you saying I should adjust both rear linkage so the rear bags measure 10”?
Second question, what happens when I adjust the linkage in the front?
Thanks for your help, it is sincerely appreciated

David T. Richelderfer:
https://beaveramb.org/forum/index.php/topic,8304.msg57237.html#msg57237

Eric Maclean Co-Admin:
Duane
That is correct the ride height should be 10" measured from the bottom mounting plate to the top mounting plate on all the air bags both front and rear.
Make sure to have the coach aired up ( above 100 psi ).
The rear ride height valves control two air bags each for their respective side.
The front ride height valve control all four front air bags together as one.
Get your rear ride height set first then set the front
Remember to do this on level ground

Eric

Duane Kunze:
Okay, thanks again for the reply and advice. More.work to do.
Have a great day

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