Recall campaign · NHTSA 81V088000

Service brakes, air: controls: hand control/valve

MACK TRUCKS, INCORPORATED filed this campaign with NHTSA on 1981-07-08.

Recall campaignNHTSA 81V088000

Service brakes, air: controls: hand control/valve

Component
Service brakes, air: controls: hand control/valve
Manufacturer
MACK TRUCKS, INCORPORATED
Vehicles affected
10,000
Reported to NHTSA
1981-07-08
Owners notified
1981-12-21

Defect 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.

Manufacturer remedy

THE HOLES WILL BE RETOOLED TO PROVIDE CORRECT ALIGNMENT AND PLASTIC KNOBS WILL BE REPLACED BY KNOBS OF STRONGER MATERIAL HAVING METAL REINFORCEMENTS.

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.

Scope of coverage

8 model years across 4 models.

ModelYears on record
MACK F Series1980 1979
MACK MC Series1980 1979
MACK R Series1980 1979
MACK U Series1980 1979

Safety recall repairs are provided free of charge by franchised dealers, regardless of vehicle age or mileage. This page displays aggregated data for the model year. To check recall status for a specific vehicle, search its VIN at nhtsa.gov.