Compressor Assembly, Air Suspension: Description
All pressurized air suspension components contain high pressure air (up to 220 psig). Use extreme caution when inspecting for leaks. Wear safety goggles and adequate protective clothing when inspecting or servicing the air suspension system. A sudden release of air under this amount of pressure can cause possible serious or fatal injury.
Before performing any service on the air suspension system, the system must be disabled to prevent the system from changing ride height. Before any given component is to be serviced it must be deflated. Servicing the air suspension system without the system disabled, or with pressure in any specific component, can cause possible serious or fatal injury.
When handling the air suspension compressor assembly, keep upright and carry only by the compressor itself or the primary bracket (bolts the assembly to the vehicle).
The Air Supply Unit (ASU) is located on the vehicle frame rail on the passenger side of the vehicle. The ASU contains the air dryer, compressor, exhaust valve, valve block, pressure sensor, and temperature sensor.
The compressor itself is suspended from the ASU mounting bracket by three spring loaded studs to reduce vibration and noise. The valve block is bolted to a mounting bracket that is in turn bolted directly to the side of the ASU mounting bracket. The ASU is serviced as an assembly.
The compressor cannot refill the reservoir and the complete system if all pressure is exhausted, as in a compressor assembly or valve block replacement. The system will need to be filled at the reservoir with nitrogen. For complete filling of the air suspension system after a repair. Refer to STANDARD PROCEDURE .