NHTSA Campaign Id 03V253000; Date: Jul. 17, 2003
In this condition, the vehicle would not meet the emergency requirements of the standard.
2003 Mack CH; 2003 Mack CL; 2003 Mack CV; 2003 Mack CX; 2003 Mack DM6; 2003 Mack DMM; 2003 Mack LE; 2003 Mack MR; 2003 Mack RD6; 2003 Mack RD8
Component: Service Brakes, Air:supply:check Valve
Manufactured by: Mack Trucks, Incorporated
Affected Units:: 1,232
Certain heavy duty vehicles fail to comply with the requirements of federal motor vehicle safety standard no. 121, "air brake systems. " improper seating of the check valve retainer in the brass fitting housing has occurred. It is possible for the air brake system pressure to push the check valve internal parts into the primary system reservoir and a vehicle operator would not know that this has happened.
Dealers will replace the check valve. Owner notification began November 26, 2003. Owners should contact mack at 1-610-709-3337.
Mack recall no. Sc0281. Customers can also contact the national highway traffic safety administration's auto safety hotline at 1-888-dash-2-dot (1-888-327-4236).
Date Owners notified by Manufacturer: Nov 26, 2003
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