SMU - Revised Air Spring Compressor Replacement

This bulletin is being issued to revise the Air Spring Compressor Replacement procedure in the Air Suspension sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information.

The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.

This Installation section of this procedure has been revised to add a step for pressurizing the air springs as shown below:

8. Remove the support from the compressor.

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.

9. Pressurize the air springs. Refer to Air Suspension Pressurization Procedure.

10. Perform the suspension position calibration procedure. Refer to Suspension Position Calibration.

11. Check for leaks. If a leak is found at the air supply line connections replace the air supply lines. Refer to Air Suspension Air Line Replacement.