Recall campaign · NHTSA 79V171000

Suspension: rear: springs: leaf spring assembly

MACK TRUCKS, INCORPORATED filed this campaign with NHTSA on 1979-07-12.

Recall campaignNHTSA 79V171000

Suspension: rear: springs: leaf spring assembly

Component: Suspension: rear: springs: leaf spring assembly
Manufacturer: MACK TRUCKS, INCORPORATED
Vehicles affected: 1,706
Reported to NHTSA: 1979-07-12
Owners notified: 1979-12-10

Defect description

THE SPRING SEAT PLATE, LOCATED BETWEEN THE AXLE HOUSING AND THE SUSPENSION SPRINGS, MAY DEFORM DUE TO SPRING BENDING. AS A RESULT, THE CLAMPING FORCE IN THE ASSEMBLY MAY BE REDUCED. LOSS OF CLAMPING FORCE COULD CAUSE SPRING FAILURE AND THE AXLE WILL DISLOCATE. ALSO, THE TIRE COULD COME INTO CONTACT WITH THE SPRING.

Manufacturer remedy

THE DEALER WILL REPLACE THE EXISTING SPRING SEAT WITH A NEWLY FABRICATED SEAT WHICH IS WELDED TO THE HOUSING. AN IMPROVED SPRING CLAMPING PLATE AND NEW SPRINGS WILL ALSO BE INSTALLED WITHOUT CHARGE.

Notes

VEHICLE DESCRIPTION: TRUCKS.SYSTEM: SUSPENSION; REAR AXLE ASSEMBLY.CONSEQUENCES OF DEFECT: LOSS OF VEHICLE CONTROL AND AN ACCIDENT COULD RESULTDUE TO DISLOCATION OF AXLE AND TIRE TO SPRING INTERFERENCE.

Scope of coverage

13 model years across 13 models.

Model	Years on record
MACK F	1979
MACK FM	1979
MACK MB	1979
MACK MC	1979
MACK MR	1979
MACK R	1979
MACK RL	1979
MACK RM	1979
MACK RS	1979
MACK RWL	1979
MACK RWS	1979
MACK WL	1979
MACK WS	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.