NHTSA Campaign Id 93V024000; Date: Feb. 16, 1993
This condition can cause bolt failure and allow thedriveline to separate from the carrier assembly.
1992 Mack CH; 1993 Mack CH; 1992 Mack CL; 1993 Mack CL; 1992 Mack DM; 1993 Mack DM; 1992 Mack MH; 1993 Mack MH; 1992 Mack MR; 1993 Mack MR; 1992 Mack RB; 1993 Mack RB; 1992 Mack RD; 1993 Mack RD; 1992 Mack RM; 1993 Mack RM
Component: Trailer Hitche
Manufactured by: Mack Trucks, Incorporated
Affected Units:: 4,924
The carrier yoke bolts were manufactured with worn rolling thread dies, causing stress concentrations which caused cracks during the quenching process.
Replace the carrier yoke bolts.
System: trailer yoke. Vehicle description: heavy trucks.
Date Owners notified by Manufacturer: Mar 24, 1993
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