Suspension - Hissing Noise From Airmatic Compressor

Date: June 16, 2008

Order No.: T-B-32.22/65

Supersedes:

Group: 32

SUBJECT:
Model 164.122/172/175/177/186/822/871/886
Model 251.122/156/165/175/177

Discharge Noise from Airmatic Compressor

If you receive customer reports in the above model vehicles of an excessively loud hissing noise from the air discharge of the Airmatic compressor, install a damping mat and modified intake hose to resolve. Please ensure to observe the following notes when installing the damping mat and intake hose.





1. Install damping at in proper location. See Figures 1, 2 or 3 for specific model locations.

2. Route the modified intake hose from the compressor upwards to the damping mat. See Figure 1, 2 or 3 above for specific model routings.





3. When routing, it is important to ensure that the end of the intake hose is lying against the damping mat (Figure 4, 1) under slight tension.

4. The attached intake hose must be routed horizontally at the compressor (Figure 4, 2).

Note:
Air discharge from the Airmatic compressor is a normal operating characteristic of the Airmatic suspension system. Discharge at regular intervals is required in order to remove moisture from the compressor's air drier.

Note:
Dampening mats have been implemented into series production as of January 8, 2007, and modified intake hoses have been implemented into series production as of July 1, 2007.





Parts Information

Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on June 16, 2008. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.





In Case of Warranty, use the table.