OFFICIAL NHTSA RECALL
89E004000
Service Brakes, Air
Reported Mar 1, 1989 · MIDLAND BRAKE, INC.
Summary
HYDROGEN EMBRITTLEMENT OF THE SCREWS USED TO HOLD TOGETHER SECTIONS OF THE VALVE BODY. THIS CONDITION CAUSES THE HEADS OF THE SCREWS TO BREAK OFF UNDER STRESS.
Consequence
THE LOSS OF THE SCREW HEADS ALLOWS THE VALVE TO COMEAPART AND CAUSES LOSS OF BRAKING ABILITY, WHICH COULD RESULT IN AN ACCIDENT.
Remedy
SCREWS WILL BE REPLACED WITH A PHOSPHATE AND OIL TREATED SCREW RATHER THAN AN ELECTRO DEPOSITED PLATING. THE DRIVE HEADS WILL BE CHANGED FROM SQUARE DRIVE TO A TORX HEAD SCREW.
Notes
SYSTEM: BRAKES/AIR.VEHICLE CATEGORY: TRAILER AIR BRAKE.
This campaign page uses the representative official campaign record. Applicability-specific source variants appear on the linked vehicle pages. Recall counts refer to campaigns, not affected vehicles.
Vehicle entries in this campaign
This is model-level recall history. It does not confirm whether a particular VIN is affected or has received the repair. Check with NHTSA ↗