MACK DMM Recalls

Jul 17, 2003 – 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.

Dec 21, 2001 – VEHICLE DESCRIPTION: TRUCKS EQUIPPED WITH E-TECH ENGINES. A CONDITION EXISTS ON THE AUXILIARY DRIVE SHAFT OF THE E-TECH ENGINE THAT CAUSES THE LOSS OF POWER STEERING ON VEHICLES WHERE THE POWER STEERING PUMP IS MOUNTED OFF THE FRONT OF THE ENGINE.

Aug 01, 2001 – VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS EQUIPPED WITH CERTAIN MERITOR-WABCO BRAKE SYSTEM TWO AND FOUR PORT RELAY VALVES. THE VALVE MAY STICK OPEN WHEN A HIGH-PRESSURE APPLICATION IS RELEASED.

Feb 15, 1994 – FUEL INJECTION SYSTEM RECONFIGURATION TO COMPLY WITH ENGINE EMISSION STANDARDS CAUSE HIGHER ENGINE VIBRATION LEVELS WHICH LEAD TO EARLY WEAR AND COMPLETE FAILURE OF THE SECONDARY THROTTLE RETURN MECHANISM.

Mar 16, 1990 – A TOLERANCE MISMATCH IN THE CRANK ASSEMBLY OF THE BOSCH WINDSHIELD WIPER MOTOR COULD CAUSE INSTANTANEOUS SEPARATION OF THE CRANK FROM THE LINKAGE ASSEMBLY IN THE LEFT HAND CONTROL ARM ASSEMBLY; THIS WOULD MAKE THE SYSTEM INOPERABLE.

Feb 23, 1990 – CRACK MAY DEVELOP ON STEERING ARM THAT COULD PROGRESS AND REDUCE THE FATIGUE LIFE OF THE STEERING ARM.

Mar 03, 1989 – AN INCORRECT HIGH PRESSURE POWER STEERING HOSE MAY HAVE BEEN INSTALLED.

Mar 03, 1989 – DOWELS MAY HAVE BEEN OMITTED DURING SPRING CAP INSTALLATION; THIS WOULD PUT SHEAR LOAD ON THE FOUR (4) SPRING CAP BOLTS.

Oct 18, 1988 – CERTAIN ENGINE SUPPORT CASTINGS WERE PRODUCED WITH FAULTY METALLURGY AND COULD FAIL.

Jul 27, 1988 – SOME OF THE NUTS/BOLTS USED TO FASTEN THE STEERING PITMAN ARM MAY LOOSEN.