Mack DM SERIES recalls by model year

Reported: 1981-07-08 (July 8, 1981) · Model years: 1980, 1981

THE INVOLVED TRUCKS DO NOT COMPLY WITH FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 208, "OCCUPANT CRASH PROTECTION", IN THAT THE EXTENDED RIDER"S SEAT WAS NOT EQUIPPED WITH A SEAT BELT AS REQUIRED.

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: 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: 1988-07-27 (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: 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.