Recall 89E004000: Service Brakes, Air

NHTSA recall 89E004000 · announced March 1, 1989 · Midland Brake · 4,809 units affected

The problem

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.

The risk

THE LOSS OF THE SCREW HEADS ALLOWS THE VALVE TO COMEAPART AND CAUSES LOSS OF BRAKING ABILITY, WHICH COULD RESULT IN AN ACCIDENT.

What to do

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.

Official NHTSA recall notice →

Notes

SYSTEM: BRAKES/AIR.VEHICLE CATEGORY: TRAILER AIR BRAKE.

Source: National Highway Traffic Safety Administration public recall data. This page reports official records and is not legal, medical, or repair advice.