Mack 1979–1980 Service Brakes, Air recall
Recalled July 8, 1981 · NHTSA recall 81V088000 · Mack
Remedy
THE HOLES WILL BE RETOOLED TO PROVIDE CORRECT ALIGNMENT AND PLASTIC KNOBS WILL BE REPLACED BY KNOBS OF STRONGER MATERIAL HAVING METAL REINFORCEMENTS.
Units
10,000 units
Description
THE RETAINING PIN FOR THE BRAKE CONTROL KNOB HAS BEEN MISALIGNED (OFF THE CENTER LINE OF THE VALVE PLUNGER HOLE). THIS CAUSES THE KNOB TO BE OVERSTRESSED AT THE RETAINING PIN HOLE AREA CAUSING IT TO SEPARATE FROM THE VALVE.
What to do
THE HOLES WILL BE RETOOLED TO PROVIDE CORRECT ALIGNMENT AND PLASTIC KNOBS WILL BE REPLACED BY KNOBS OF STRONGER MATERIAL HAVING METAL REINFORCEMENTS.
Product
Mack F SERIES · Mack MC SERIES · Mack R SERIES · Mack U SERIES
Manufacturer(s)
Mack Trucks, Inc.
Source: U.S. National Highway Traffic Safety Administration. Official recall notice on nhtsa.gov →