NHTSA recall 89E004000 · Equipment
Service brakes, air
Reported Mar 1, 19894,809 vehicles affectedMIDLAND BRAKE, INC.Built May 1, 1988 – Oct 1, 1988
The defect
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.
The 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.