‘93 W9 8 bag suspension not fully pressurized

Seems like the front two bags are getting 90%, the rear two on the front axle are 80% and the four rear axle bags, might be 50%. I don’t hear any leaks in the cab or outside. Can switch dumps air fine and when switched to “raise”, it starts to fill but doesn’t complete.

 

I apologize but I’m not at the truck, at the moment. Only valves I saw were the leveling valve and a valve that’s supplied air from the leveling valve. After that, all bags are basically linked together. I really don’t understand why I’m seeing what I’m seeing, with the front bags having more air than the rest. Shouldn’t they be equalized?

 

Yeah, I’m gauging off feel and looks. Fronts, look and feel much tighter.
I dropped from an end dump and hooked to a hopper that I haven’t pulled since February. I tried it with brakes released, as well.

 

Never noticed it to be unlevel.

 

I’ll have to get a pic of it this afternoon. There’s one valve with linkage to the back of the rear differential, that has air supplied from up from tanks. That valve has a line coming from it, going to a small valve on the left frame rail, that then supplies air to all 8 bags.