Mack Recall 79V171000: Suspension, Rear, Springs, Leaf Spring Assembly

NHTSA recall 79V171000 · announced July 12, 1979 · filed by Mack Trucks, Incorporated · 1,706 units affected

The problem

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.

What to do

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.

Official NHTSA recall notice →

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.

Vehicles covered by this recall

• 1979 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

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