NHTSA Campaign 79V171000
SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY
Issued by MACK TRUCKS, INCORPORATED · Reported Jul 12, 1979 · 1,706 vehicles affected
What's wrong
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.
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.
Vehicles affected by this recall
| Make | Model | Year | Units |
|---|---|---|---|
| MACK | F | 1979 | 1,706 |
| MACK | FM | 1979 | 1,706 |
| MACK | MB | 1979 | 1,706 |
| MACK | MC | 1979 | 1,706 |
| MACK | MR | 1979 | 1,706 |
| MACK | R | 1979 | 1,706 |
| MACK | RL | 1979 | 1,706 |
| MACK | RM | 1979 | 1,706 |
| MACK | RS | 1979 | 1,706 |
| MACK | RWL | 1979 | 1,706 |
| MACK | RWS | 1979 | 1,706 |
| MACK | WL | 1979 | 1,706 |
| MACK | WS | 1979 | 1,706 |
Source: NHTSA Campaign 79V171000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.