Vehicle recall 84V140000 · November 7, 1984
Mack MH and R
Due to improper and inadequate welding practices, the fifth wheel on the involved vehicles is defective.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Due to improper and inadequate welding practices, the fifth wheel on the involved vehicles is defective. Frame mounted supports may have incomplete or poor quality welds. The welds could subsequently fail allowing separation of the tractor from the trailer.
- Remedy
- The dealer will inspect and remove the fifth wheel and reweld the mounting angles at no charge to the owner.
- Notes
- Vehicle description: truck tractors.system: structure; fifth wheel assembly.consequences of defect: if the trailer separates during operation an accidentand personal injury could result.
Recall details
- NHTSA campaign
- 84V140000
- Reported to NHTSA
- November 7, 1984
- Filed by
- MACK TRUCKS, INCORPORATED
- Vehicles potentially affected
- 64
- Initiated by
- the manufacturer
- Components
- Trailer hitches › Fifth wheel assembly
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
Has your Mack been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Mack dealer can also check your VIN. Recall repairs are free.