Originally Posted by Wagon Wheels
Where abouts is the linkage adjustment?? I have followed the pipe from the air bags to a solenoid looking thing to then maybe a value (3 x bits going to it). Do you need the engine running to make it all work??
The linkage adjustment is an arm that is part of the valve that allows air to enter or leave the bags.
If the air tank is at maximum pressure, you probably would not need the engine running.
Once you locate the valve, the rest will be easy. Follow the rubber hose from one of the bags, and that should lead you to the leveling valve.
It could remotely be possible that the previous owner pinched the air line off, if the air bags need replacing.
I do not have a photo available.