Mack RD SERIES recalls by model year

Reported: 1981-12-29 (December 29, 1981) · Model years: 1977, 1978, 1979, 1980, 1981

THE RIGHT HAND CLEARANCE LAMP IS OBSCURED, FROM CERTAIN ANGLES OF VISION, BY THE IN-LINE PRECLEANER AIR CLEANER CAP. THE INVOLVED VEHICLES FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT".

Remedy: DEALER WILL REPLACE THE AIR CLEANER WITH ONE OF ACCEPTABLE HEIGHT.

Reported: 1981-12-29 (December 29, 1981) · Model years: 1981

THE PITMAN ARM RETAINING BOLT MAY NOT HAVE BEEN TIGHTENED TO THE REQUIRED SPECIFICATIONS DUE TO A DESIGN CHANGE. INADEQUATE RETENTION OF THE BOLT TO THE OUTPUT SHAFT COULD ALLOW THE PITMAN ARM TO LOOSEN.

Remedy: THE DEALER WILL INSPECT AND, IF NECESSARY, RETORQUE THE RETAINING BOLT TO PROPER SPECIFICATIONS AT NO CHARGE.

Reported: 1986-01-17 (January 17, 1986) · Model years: 1981, 1982, 1983, 1984

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.

Remedy: ENLARGE THE ACCELERATOR ROD HOLE TO ELIMINATE INTERFERENCE WITHIN ACCELERATOR LINKAGE.

Reported: 1984-03-22 (March 22, 1984) · Model years: 1983, 1984

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

Remedy: INSPECTION AND, IF NECESSARY, INSTALLATION OF PROPER STEERING SHAFT CLAMP BOLTS TIGHTENED TO SPECIFICATIONS.

Reported: 1987-11-23 (November 23, 1987) · Model years: 1987

CROSS STEERING LEVERS MAY BE IMPROPERLY HEAT TREATED AND SUBJECT TO FAIL DURING NORMAL OPERATION.

Consequence: SUCH FAILURE COULD CAUSE LOSS OF TRUCK CONTROL WITHOUTPRIOR WARNING AND RESULT IN A CRASH.

Remedy: INSTALL NEW, PROPERLY HEAT TREATED STEERING LEVER.

Reported: 1988-09-27 (September 27, 1988) · Model years: 1987

FASTENERS THAT HOLD THE REAR WHEEL TO THE HUB AND DRUM ASSEMBLY MAY BE IMPROPERLY TORQUED.

Consequence: AN UNDERTORQUED FASTENER WILL LOOSEN UP AND CAN RESULT INWHEEL SEPARATION, LOSS OF CONTROL, AND AN ACCIDENT.

Remedy: PROPERLY TORQUE REAR WHEEL SPACE FASTENERS.

Reported: 1988-09-27 (September 27, 1988) · Model years: 1987

THE UNDERSIZED WELD ON THE REAR SUSPENSION BRACKETRY ATTACHMENT CAN CAUSE BRACKET FAILURE.

Consequence: BRACKET FAILURE CAN ALLOW THE SPRING ASSEMBLY TO BERELEASED ONTO THE ROADWAY, POSSIBLY RESULTING IN LOSS OF CONTROL AND ANACCIDENT.

Remedy: REPLACE ANY HOUSINGS THAT HAVE SINGLE PASS (UNDERSIZED) WELDS ON THE BRACKETRY ATTACHMENT.

Reported: 1988-10-18 (October 18, 1988) · Model years: 1987, 1988

THERE MAY BE INSUFFICIENT WELD WHERE THE STEP IS WELDED TO THE FUEL TANK.

Consequence: WELD CRACKS COULD EVENTUALLY CAUSE STEPS TO DISENGAGEAND POSSIBLY INJURE PERSONS ENTERING OR LEAVING THE TRUCK.

Remedy: REPLACE FUEL TANK STEPS WITH CRACKS; MODIFY OTHERS TO PREVENT STEP FROM SEPARATING FROM THE TANK.

Reported: 1989-03-03 (March 3, 1989) · Model years: 1987, 1988

AN INCORRECT HIGH PRESSURE POWER STEERING HOSE MAY HAVE BEEN INSTALLED.

Consequence: UNDER CERTAIN CONDITIONS, HOSE COULD FAIL RESULTING INLOSS OF POWER STEERING ASSIST AND POSSIBLY AN ACCIDENT.

Remedy: REPLACE INCORRECT POWER STEERING HOSES.

Reported: 1988-05-23 (May 23, 1988) · Model years: 1988

CLAMP PLATES USED BETWEEN THE DRIVE SHAFT AND CARRIER YOKES MAY CRACK AND COULD BREAK DUE TO IMPROPER HEAT TREATMENT.

Consequence: IF CLAMP PLATE BREAKS, YOKE WOULD FLY OFF AT DETACHEDPOINT AND COULD INJURY ANYONE STRUCK BY FLYING FRAGMENTS. ALSO, THE DETACHEDINNER SHAFT COULD INTERFERE WITH THE BRAKE SYSTEM AIR SUPPLY HOSES AND TRACTORTIRES, WHICH COULD RESULT IN LOSS OF TRUCK CONTROL AND AN ACCIDENT.

Remedy: INSTALL NEW CLAMPING PLATES AND CAPSCREWS IN ALL LOCATIONS AS NEEDED.

Reported: 1988-06-27 (June 27, 1988) · Model years: 1988

COMPRESSION OF FRONT SPRINGS COULD INTERFERE WITH THE 90 DEGREE CROSSOVER FITTINGS ON THE BOTTOM OF THE GEARS.

Consequence: IF ONE OF THE FITTINGS BREAK, THE HYDRAULIC FLUID ISLOST, RESULTING IN LOSS OF POWER STEERING AND POSSIBLY A CRASH.

Remedy: REPLACE CENTER PORT STEERING GEAR CYLINDER HEADS WITH NEW SIDE PORT CYLINDER HEADS. ALSO, INSTALL THICKER BUMPER STOPS TO ELIMINATE SPRING TO GEAR CONTACT.

Reported: 1988-07-27 (July 27, 1988) · Model years: 1988

SOME OF THE NUTS/BOLTS USED TO FASTEN THE STEERING PITMAN ARM MAY LOOSEN.

Consequence: THIS WOULD ALLOW THE PITMAN ARM TO COME OFF THE STEERINGGEAR SECTOR SHAFT AND RESULT IN IMMEDIATE LOSS OF STEERING CONTROL AND A VEHICLECRASH COULD OCCUR.

Remedy: RETORQUE NUTS/BOLTS WHERE NECESSARY.

Reported: 1988-10-18 (October 18, 1988) · Model years: 1988

CERTAIN ENGINE SUPPORT CASTINGS WERE PRODUCED WITH FAULTY METALLURGY AND COULD FAIL.

Consequence: FAILURE OF ONE OR BOTH BRACKETS COULD CAUSE DISLOCATIONOF ENGINE AND TRANSMISSION ASSEMBLY, WHICH COULD RESULT IN TRUCK DISABLEMENT,POSSIBLE LOSS OF ACCELERATOR CONTROL AND AN ACCIDENT.

Remedy: REPLACE REAR ENGINE SUPPORTS AS NECESSARY.

Reported: 1989-03-03 (March 3, 1989) · Model years: 1988

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

Consequence: THIS COULD RESULT IN LOOSENING AND FAILURE OF THE BOLTSWITH POSSIBLE LOSS OF CONTROL AND ACCIDENT POTENTIAL.

Remedy: INSTALL THE MISSING DOWELS TO PREVENT MOVEMENT BETWEEN THE SPRING CAP AND AXLE HOUSING.

Reported: 1989-05-22 (May 22, 1989) · Model years: 1988, 1989

STEERING WHEEL RETAINING NUTS MAY HAVE BEEN IMPROPERLY INSTALLED AND/OR TORQUED.

Remedy: RENEW AND RETORQUE STEERING WHEEL RETAINING NUTS.