NHTSA Campaign Id 96V221000; Date: Nov. 4, 1996
If air pressure drops below 55 psi and the operator does not heed the low air pressure warning and continues to drive, the parking brake will apply. This can cause the parking brake lining to overheat and prematurely wear. When the bus is parked and the brake applied, the parking brake would not operate properly.
1996 Amtran RS3302; 1997 Amtran RS3302; 1996 Amtran RS3505; 1997 Amtran RS3505; 1996 Amtran RS3708; 1997 Amtran RS3708
Component: Parking Brake:driveline:air
Manufactured by: American Transportation Corp.
Affected Units:: 194
The air/spring actuated parking brake chambers manufactured by midland (date code 145b6k) were filled with the wrong lubrication. The improper lubricant causes the seals within the chamber to fail and results in loss of air. If air pressure drops to 55 psi the spring within the chamber will automatically apply the parking brake.
Dealers (or owners) will inspect the brake chambers for the suspect date code. If the chamber has this code, the parking brake chamber will be replaced.
Owner notification:owner notification began October 28, 1996. Note:owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact amtran at 1-800-843-5615. Also contact the national highway traffic safety administration's auto safety hotline at 1-800-424-9393.
Date Owners notified by Manufacturer: Dec 11, 1996
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