I used a bit of silicone grease on the surface of the rubber piece and the gasket before reassembling. You can see that now the rubber piece is smooth, and the gasket has resumed a better shape. I then used silicone spray to clean everything up, the gasket as well. I also used a wire wheel on the access panel to get it clean, the inner surface in particular. I used 400 grit sand paper on a flat surface to rub it back to a smooth clean surface. The imprinted circle in the rubber piece is the culprit. I took brake cleaner and sprayed it down before opening it up - try to keep dirt out. The really rusty access panel on the outside of the pump takes a Torx 25 bit to open up - 2 screws. You shouldn't need to remove the other connections - you should have this by now. Remove the two hoses that connect to the left and right air bags - can't remember the wrench size but it was small. You need to lift up to remove it, it's got a couple of tabs that lock in to the top of the frame rail. Two 13mm bolts hold the compressor to the frame rail. Jack up the rear end and remove the passenger tire. Pull the fuse for the air suspension system. I found a description on another site about a method to refurbish the existing parts, so I thought I'd give that a go. I confirmed that the compressor still had pressure by using the aux hose and running using the switch to activate it.įurther research (thanks GMTNation) showed that the likely culprit was the check valve in the system no longer functioning, to which there is a rebuild kit. I found that my air bags were not inflating when my compressor ran.
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