Recall 79V-171: 1979 Mack F, 1979 Mack FM and 11 more
MACK TRUCKS, INCORPORATED recall for suspension, reported to NHTSA on Jul 12, 1979, covering about 1,706 vehicles.
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.
The fix
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.
Recall details
| Manufacturer | MACK TRUCKS, INCORPORATED |
|---|---|
| Component | Suspension › Rear › Springs › Leaf Spring Assembly |
| Recall started by | the manufacturer |
| NHTSA campaign number | 79V171000 |
Vehicles in this recall
| Vehicle | Model years | |
|---|---|---|
| Mack F | 1979 | All years |
| Mack FM | 1979 | All years |
| Mack MB | 1979 | All years |
| Mack MC | 1979 | All years |
| Mack MR | 1979 | All years |
| Mack R | 1979 | All years |
| Mack RL | 1979 | All years |
| Mack RM | 1979 | All years |
| Mack RS | 1979 | All years |
| Mack RWL | 1979 | All years |
| Mack RWS | 1979 | All years |
| Mack WL | 1979 | All years |
| Mack WS | 1979 | All years |
Not every vehicle of these model years is included. Enter your VIN at nhtsa.gov/recalls ↗ or ask a dealer.
Frequently asked questions
What is recall 79V-171?
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.
How is recall 79V-171 fixed?
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.
Is the recall repair free?
Yes. Safety recall repairs are free at authorized dealers. Check whether your vehicle is included with its VIN at nhtsa.gov/recalls.