MACK R 1975: SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY:LEAF
NHTSA Campaign ID Number: 76V004000
| Make | Model | Year |
|---|---|---|
| MACK | R | 1975 |
| Date Owners Notified | Date Received by ODI | Date Added to Database |
| 1976-02-23 | 1976-01-13 | 1979-10-12 |
Production Dates: 1974-10-01 - 1976-03-01
Manufacturers Involved: Mack Trucks, Inc.
Component: SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY:LEAF
Potential Number Of Units Affected: 54
Report Initiator: MFR MFR Report
MACK CAMPAIGN NO SC071.TRUCKS EQUIPPED WITH SWTL-56 SERIES REAR AXLE.POSSIBILITY THAT THE REAR SUSPENSION WAS ASSEMBLED WITH AN INCORRECT TRUNNIONTHAT HAS A RADIUSED SPRING SEAT, CREATING A LINE OF CONTACT BETWEEN THE SPRINGSEAT AND THE SPRING ITSELF, SUBJECTING THESE COMPONENTS TO HIGH STRESSCONCENTRATIONS.IF THIS CONDITION EXISTS IT COULD ULTIMATELY LEAD TO PREMATURESPRING FAILURE, AND PERMIT AXLE ASSEMBLY DISLOCATION THAT COULD RESULT IN LOSSOF VEHICLE CONTROL WITHOUT WARNING TO THE DRIVER, WITH POSSIBLE VEHICLE CRASH.'CORRECT BY INSPECTING AND INSTALLING SPECIFIED SPRING TRUNNIONS THATINCORPORATE FLATSPRING SEATS'.
