Mack during the coupling process, it is possible for the driver to partially close the fifth wheel lock and if solely relying on a tug test (pull test), the driver may think that the fifth wheel lock is properly coupled to the trailer king pin when in fact it is not properly coupled.
The short version
MACK TRUCKS, INC reported a problem with the trailer hitches fifth wheel assembly. Here is what owners need to know.
DURING THE COUPLING PROCESS, IT IS POSSIBLE FOR THE DRIVER TO PARTIALLY CLOSE THE FIFTH WHEEL LOCK AND IF SOLELY RELYING ON A TUG TEST (PULL TEST), THE DRIVER MAY THINK THAT THE FIFTH WHEEL LOCK IS PROPERLY COUPLED TO THE TRAILER KING PIN WHEN IN FACT IT IS NOT PROPERLY COUPLED.
IF THE DRIVER DRIVES AWAY WITH A TRAILER THAT IS NOT PROPERLY COUPLED, THE TRAILER CAN COME LOOSE AND POTENTIALLY RESULT IN A VEHICLE CRASH.
MACK TRUCKS WILL NOTIFY OWNERS AND DEALERS WILL REPLACE THE LOCK BAR FREE OF CHARGE.
Affected vehicles
These model years are included in NHTSA campaign 11V-461.
| YEAR RANGE | MODEL |
|---|---|
| 2011–2012 | Mack Pinnacle |
What changed
Newest first. The record shows both when the recall began and what has changed since.
- Recall reported to NHTSA. LATEST
Drive one of these? Check your VIN to see if your specific vehicle is affected.
Check your VINWhat this record means
Data from the NHTSA recall database. A clean VIN check means no open federal recalls for that vehicle — not that it never had one.
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MyAutoRecalls is not affiliated with MACK TRUCKS, INC or the National Highway Traffic Safety Administration.