Air Line: Service and Repair

Air Suspension Air Line Replacement

Removal Procedure

Caution; Do NOT remove an air supply pipe in an attempt to depressurize the air suspension. Always follow the Air Suspension Depressurization Procedure. Failure to follow this procedure may cause personal injury or damage to the vehicle.

1. Depressurize the air suspension system.
2. Raise and support the vehicle. Refer to Vehicle Lifting.





3. Disconnect all air lines using the following procedure. Air spring connection shown. All others are similar.
1. Push the air supply line into the air spring connection and hold in place.
2. Depress and hold the air supply line collet (2) down.
3. Remove the air supply line (1) from the air spring.
4. For air lines that are integral to a wiring harness. Trim off air line at the wiring harness with a sharp cutting tool. Leave the remaining air line in the wiring harness.

Installation Procedure





1. Important: Inspect the ends of all air supply pipes for deep scoring and sharp edges before reinstalling the pipe to the fitting. Replace any pipe that exhibits any of the above conditions.

Install air line to the appropriate fitting until the line bottoms.

2. Important: If the rear axle was allowed to hang unsupported, lower the vehicle far enough to allow the air spring to be manually engaged to the support on the axle tube with minimal distortion of the air spring bladder. Ensure that the air spring is fully engaged to the axle support.

Pressurize the air springs. Refer to Air Suspension Pressurization Procedure.
3. Lower vehicle.
4. Start the vehicle and run for approximately 2 minutes to verify that the air suspension system is functioning properly.