The defect
THE CARRIER YOKE BOLTS WERE MANUFACTURED WITH WORN ROLLING THREAD DIES, CAUSING STRESS CONCENTRATIONS WHICH CAUSED CRACKS DURING THE QUENCHING PROCESS.
The risk
THIS CONDITION CAN CAUSE BOLT FAILURE AND ALLOW THEDRIVELINE TO SEPARATE FROM THE CARRIER ASSEMBLY.
The remedy
REPLACE THE CARRIER YOKE BOLTS.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Mack CH | 1992, 1993 |
| Mack CL | 1992, 1993 |
| Mack DM | 1992, 1993 |
| Mack MH | 1992, 1993 |
| Mack MR | 1992, 1993 |
| Mack RB | 1992, 1993 |
| Mack RD | 1992, 1993 |
| Mack RM | 1992, 1993 |
Components: TRAILER HITCHES
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Mack CH | 1992 | 1 | 5 |
| Mack CH | 1993 | 0 | 4 |
| Mack CL | 1992 | 0 | 2 |
| Mack CL | 1993 | 0 | 1 |
| Mack DM | 1992 | 0 | 2 |
| Mack DM | 1993 | 0 | 1 |
| Mack MH | 1992 | 0 | 2 |
| Mack MH | 1993 | 0 | 1 |
| Mack MR | 1992 | 0 | 2 |
| Mack MR | 1993 | 0 | 1 |
| Mack RB | 1992 | 0 | 2 |
| Mack RB | 1993 | 0 | 1 |
| Mack RD | 1992 | 0 | 2 |
| Mack RD | 1993 | 0 | 1 |
| Mack RM | 1992 | 0 | 2 |
| Mack RM | 1993 | 0 | 1 |
Other trailer hitches recalls in 1993
7 of the 223 recall campaigns reported to NHTSA in 1993 concerned the trailer hitches; MACK TRUCKS, INCORPORATED filed 245 campaigns in all.
| 93V158000 24 Sept 1993 | MONON CORPORATION |
| 93V130000 25 Aug 1993 | FOUR WINDS INTERNATIONAL |
| 93V101000 8 Jun 1993 | STRICK CORPORATION |
| 93V086000 11 May 1993 | ROCKWOOD INCORPORATED |
| 93V064000 20 Apr 1993 | OSHKOSH TRUCK CORPORATION |
| 93V054000 2 Apr 1993 | COBRA INDUSTRIES, INC. |
NHTSA recalls (public domain) · all recalls of 1993