Compressor/Pump: Service and Repair

Air Spring Compressor Replacement

Removal Procedure





1. Remove the air suspension system fuse.

Caution: Refer to Sudden Release of Pressure in the Air Suspension System Caution in Service Precautions.

Notice: Depressurize the air suspension system only after the rear axle is supported and is set between D- Height and Full Jounce.

Important: Remove the air suspension system fuse before working on the rear suspension components or the rear axle. Failure to remove the air suspension system fuse could cause the calibration of the air suspension leveling sensor to change and the air suspension system not to function properly.

2. Raise and support the vehicle.
3. Remove the air spring compressor to the frame mounting bolts.





4. Disconnect the air inflator switch electrical connection, air supply lines, and air spring compressor vent hose from the air spring compressor.





5. Disconnect the air spring compressor electrical connection (2).

6. Disconnect the air supply lines (3) from the air spring compressor (1).

Important: Ensure the color on air supply lines match the color on the air spring compressor for reassembly.

7. Remove the air spring compressor from the vehicle.

Installation Procedure





1. If no damage to the air supply pipes is evident, then remove the fittings from the new compressor and use existing fittings that are already attached to air supply lines. Install the air supply lines with existing fittings to the air spring compressor.
Tighten the air supply line fittings to 2.25 Nm (20 inch lbs.).

Notice: Refer to Fastener Notice in Service Precautions.

Important: Inspect the air supply lines for deep scores or cuts. If the air supply lines are damaged the lines must be replaced.

2. If damage is evident to the air supply lines, then replace the air supply lines.
3. Connect the air spring compressor electrical connection (2).





4. Connect the air inflator switch electrical connection, air supply line, and air spring compressor vent hose to the air spring compressor.





5. Install the air spring compressor to the frame mounting bolts.
Tighten the air spring compressor to the frame mounting bolts to 20 Nm (15 ft. lbs.).
6. Lower the vehicle.
7. Install the air suspension system fuse.
8. Start the vehicle and run for approximately 1 minute to ensure that the air spring leveling system is functioning properly.
9. Inspect D height. Refer to Trim Height Inspection Procedure.
10. Inspect for leaks. If a leak is found at the air supply lines connections at the air spring compressor, replace the air supply lines.