NHTSA Campaign Id 84V140000; Date: Nov. 7, 1984
1982 Mack MH; 1983 Mack MH; 1984 Mack MH; 1982 Mack R; 1983 Mack R; 1984 Mack R
Component: Trailer Hitches:fifth Wheel Assembly
Manufactured by: Mack Trucks, Incorporated
Affected Units:: 64
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.
The dealer will inspect and remove the fifth wheel and reweld the mounting angles at no charge to the owner.
Vehicle description: truck tractors. System: structure; fifth wheel assembly. Consequences of defect: if the trailer separates during operation an accidentand personal injury could result.
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