Mack Recall 81V088000: Service Brakes, Air, Controls, Hand Control/valve

NHTSA recall 81V088000 · announced July 8, 1981 · filed by Mack Trucks, Incorporated · 10,000 units affected

The problem

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.

Official NHTSA recall notice →

Notes

VEHICLE DESCRIPTION: TRUCKS EQUIPPED WITH BRAKE CONTROL KNOBS.SYSTEM: SERVICE BRAKES; KNOB RETAINING PIN.CONSEQUENCES OF DEFECT: WITH THE KNOB BROKEN OFF, THE CONTROL VALVE WOULDBECOME DIFFICULT OR IMPOSSIBLE TO OPERATE. ONE OR A COMBINATION OF BRAKEAPPLICATIONS WOULD NOT BE POSSIBLE AND THE VEHICLE COULD BE PARKED IN AN UNSAFECONDITION. AN ACCIDENT AND PERSONAL INJURY COULD RESULT.

Vehicles covered by this recall

• 1979 Mack F Series
• 1980 Mack F Series
• 1979 Mack Mc Series
• 1980 Mack Mc Series
• 1979 Mack R Series
• 1980 Mack R Series
• 1979 Mack U Series
• 1980 Mack U Series

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