Air Compressor Service

When repair or adjustment procedures require that vehicle be raised on a hoist, it is important that the rear axle assembly remains in the normal trim height position at all times. When a frame contact hoist is used, two additional jack stands should be used to support the rear axle or control arms in the normal trim height position.

Fig. 25 Air Compressor, Disassembled:

Disassembly
1. Remove the seven compressor cover screws, then the compressor cover and gasket, Fig. 25.
2. Remove head and solenoid assembly.
3. Remove two filters, exhaust valve, spring and air dryer O-ring from head assembly.
4. Remove solenoid from head by lifting slightly and sliding to the dryer outlet side.
5. Remove O-ring from solenoid assembly.
6. Remove head gasket from cylinder assembly.
7. Remove four mounting bracket screws, then the bracket and gasket. Note position of ground wire for installation.

Fig. 26 Air Compressor Head Tightening Sequence:

Assembly
1. Install gasket and mounting bracket, then the ground wire and screws.
2. Install head gasket on cylinder assembly.
3. Install O-ring on solenoid assembly, then the solenoid in the head with valve opposite air dryer outlet.
4. Install two filters, exhaust valve and spring on head assembly.
5. Install gasket and cover on head assembly, then four short cover screws.
6. Install head and cover assembly to cylinder assembly using three long screws. Torque all seven screws in sequence, Fig. 26, to 36 inch lbs.
7. Install air dryer O-ring on compressor.