MACK R Recalls

Oct 26, 1987 – ON RIGHT HAND STEERING ARM, KEYWAY MAY BE IN THE WRONG LOCATION CAUSING A TOGGLE CONDITION TO OCCUR UNDER CERTAIN CONDITIONS.

Jul 15, 1987 – MINIMUM AIR RESERVOIR VOLUME CAPACITY IS LESS THAN REQUIRED BY FMVSS NO. 121.

May 27, 1986 – THE DRAG LINK TO PITMAN ARM TOGGLE ANGLE MAY BE GREATER THAN DESIGN CRITERIA, AND MAY CAUSE THE STEERING TO BIND. CONSEQUENCE OF DEFECT: IF TRUCK NEGOTIATES EXTREME RIGHT HAND TURN THE LEFT FRONT WHEEL DROPS INTO A DEEP HOLE, STEERING RETURN WOULD BE SLOW, WITHOUT WARNING TO OPERATOR, CREATING POTENTIAL FOR A VEHICLE CRASH.

Jan 17, 1986 – THE ACCELERATOR ROD HOLE CLEARANCE IS NOT ADEQUATE AND CAN CAUSE THE ACCELERATOR LINKAGE TO BIND. CONSEQUENCE OF DEFECT: IF BINDING OCCURS WHILE IN A FULL THROTTLE POSITION, ACCELERATOR CONTROL WOULD BE LOST WITHOUT WARNING AND AN ACCIDENT COULD OCCUR.

May 03, 1985 – THE DRAG LINKS MAY HAVE BEEN INSTALLED INCORRECTLY ALLOWING DRAG LINK CLAMP BOLT TO AXLE BEAM INTERFERENCE. CONSEQUENCE OF DEFECT: DURING A TURNING MANEUVER, INCREASED STEERING EFFORT OR COMPLETE LOCKUP OF STEERING COULD OCCUR WITHOUT WARNING. THIS COULD RESULT IN LOSS OF TRUCK CONTROL AND A CRASH.

Nov 07, 1984 – 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.

Mar 23, 1984 – SPRING SEAT CAN DEFORM, WHICH CAUSES A DECREASE IN THE CLAMPING FORCE IN THE SUSPENSION ASSEMBLY. LOSS OF CLAMPING FORCE MAY BRING ABOUT AXLE MISALIGNMENT OR AXLE HOUSING FAILURE.

Mar 22, 1984 – IMPROPER STEERING CLAMP BOLTS AND TORQUE APPLIED DURING INSTALLATION. THE BOLT COULD FAIL, ALLOWING THE STEERING YOKE TO BECOME LOOSE.

Nov 18, 1983 – MOUNTING OF THE PITMAN ARM MAY LOOSEN AND LEAD TO EXCESSIVE WEAR IN EITHER THE PITMAN ARM SPLINES OR THE STEERING GEAR SHAFT SPLINES, OR BOTH. THIS CONDITION IS DUE TO INCORRECT TIGHTENING OF THE MOUNTING SCREWS DURING ASSEMBLY.

Apr 14, 1983 – THE PITMAN ARM, A LEVER THAT TRANSMITS TURNING MOVEMENTS FROM THE STEERING GEAR TO THE STEERING LINKAGE, MAY LOOSEN OR BREAK AT ITS CONNECTION TO THE STEERING LINKAGE. THE FAILURE CAN PREVENT TURNING ATTEMPTS FROM HAVING ANY EFFECT. THE DEFECT IS CAUSED BY INCORRECT ASSEMBLY OF THE BALL STUD CONNECTION IN THE PITMAN ARM.