Recall campaign · NHTSA 78V171000

Steering: linkages: knuckle: spindle: arm

MACK TRUCKS, INCORPORATED filed this campaign with NHTSA on 1978-08-08.

Recall campaignNHTSA 78V171000

Steering: linkages: knuckle: spindle: arm

Component: Steering: linkages: knuckle: spindle: arm
Manufacturer: MACK TRUCKS, INCORPORATED
Vehicles affected: 2,100
Reported to NHTSA: 1978-08-08
Owners notified: 1979-08-10

Defect description

DEFICIENCIES, IN THE FORM OF FORGING LAPS, CRACKS AND EXCESSIVE DECARBURIZATION DURING HEAT TREATMENT, EXIST IN THE STEERING KNUCKLES. STRESSES IMPOSED WITH INTEGRAL HYDRAULIC POWER STEERING MAY LEAD TO A FAILURE IN THE AREA OF THE STEERING ARM ATTACHING BOSS. THIS TYPE OF FAILURE WOULD CAUSE LOSS OF STEERING CONTROL.

Manufacturer remedy

DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE LEFT STEERING KNUCKLE WITH AN IMPROVED TYPE OF KNUCKLE.

Notes

VEHICLE DESCRIPTION: TRUCK TRACTORS.SYSTEM: STEERING; STEERING KNUCKLE.CONSEQUENCES OF DEFECT: LOSS OF STEERING CONTROL COULD CAUSE A VEHICLEACCIDENT.

Scope of coverage

16 model years across 4 models.

Model	Years on record
MACK F	1974 1973 1972 1971
MACK MB	1974 1973 1972 1971
MACK R	1974 1973 1972 1971
MACK U	1974 1973 1972 1971

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.