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NHTSA Campaign 03V253000

SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE

Issued by MACK TRUCKS, INCORPORATED · Reported Jul 17, 2003 · 1,232 vehicles affected

What's wrong

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.

Consequence

IN THIS CONDITION, THE VEHICLE WOULD NOT MEET THE EMERGENCY REQUIREMENTS OF THE STANDARD.

Remedy

DEALERS WILL REPLACE THE CHECK VALVE. OWNER NOTIFICATION BEGAN NOVEMBER 26, 2003. OWNERS SHOULD CONTACT MACK AT 1-610-709-3337.

Vehicles affected by this recall

Make Model Year Units
MACK CH 2003 1,232
MACK CL 2003 1,232
MACK CV 2003 1,232
MACK CX 2003 1,232
MACK DM6 2003 1,232
MACK DMM 2003 1,232
MACK LE 2003 1,232
MACK MR 2003 1,232
MACK RD6 2003 1,232
MACK RD8 2003 1,232

Source: NHTSA Campaign 03V253000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.