Safety defect investigations, technical specifications, and manufacturer repair notices for Canadian owners.
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Safety recall notices and repair campaigns registered for the 1979 Mack F in Canada.
THE SPRING SEAT, WHICH IS LOCATED BETWEEN THE AXLE HOUSING AND THE REAR SUSPENSION SPRING PACK CAN DEFORM, RESULTING IN REDUCED CLAMPING FORCE IN THE SUSPENSION ASSEMBLY. THIS COULD CAUSE AXLE MISALIGNMENT, SPRING "U" BOLT LOOSENESS AND HOUSING FAILURE. AXLE DISLOCATION, WHICH COULD RESULT IN TIRE TO SPRING INTERFERENCE AND POSSIBLE IMPAIRMENT OF VEHICLE CONTROL, COULD OCCUR WITHOUT PRIOR WARNING.
A failure of this component (not entered) may increase the risk of a crash or injury.
Authorized dealerships will inspect the vehicle and complete all necessary repairs free of charge (parts and labor).
THE BRAKE CONTROL KNOB COULD FALL OFF DUE TO THE LOCATION OF THE HOLE FOR THE RETAINING PIN BEING OFF THE CENTERLINE OF THE HOLE FOR THE VALVE PLUNGER. WHEN THE RETAINING PIN IS INSTALLED, THE MISALIGNMENT CREATES EXCESSIVE STRESS AROUND THE HOLE FOR THE PIN AND THE PLASTIC FAILS. THE LOSS OF KNOB COULD IMPAIR OPERATION OF THE HAND CONTROL BRAKE VALVE.
A failure of this component (not entered) may increase the risk of a crash or injury.
Authorized dealerships will inspect the vehicle and complete all necessary repairs free of charge (parts and labor).
VEHICLES MAY BE EQUIPPED WITH GARRISON G21 SERIES POWER STEERING VALVES WITH INSUFFICIENT CONNECTION TORQUE BETWEEN THE DRAK LINK ADAPTER AND VALVE HOUSING. THIS MAY RESULT IN THE ADAPTER DISENGAGING FROM THE VALVE CAUSING LOSS OF VEHICLE CONTROL.
A failure of this component (not entered) may increase the risk of a crash or injury.
Authorized dealerships will inspect the vehicle and complete all necessary repairs free of charge (parts and labor).
VEHICLES MAY BE QEUIPPED WITH TRACTOR PARK VALVE CONTROL KNOBS MANUFACTURED BY POLYFLEX CONTROLS THAT MAY BREAK AT THE KNOB RETAINING PIN HOLE LOCATION. THIS CONDITION WOULD RENDER THE TRACTOR PARK VALVE INOPERATIVE AND UNDER CERTAIN CONDITIONS COULD ALLOW AN UNATTENDED CHASSIS TO ROLLAWAY.
A failure of this component (not entered) may increase the risk of a crash or injury.
Authorized dealerships will inspect the vehicle and complete all necessary repairs free of charge (parts and labor).
VEHICLES EQUIPPED WITH MACK RA23 OR RA24 REAR AXLES MAY CONTAIN REAR SUSPENSION SPRING SEATS THAT COULD DEFORM ON SPRING DEFLECTION RESURING GEAR OUTPUT SHAFT SPLINES AND ULTIMATELY LEAD TO A LOSS OF VEHICLES EQUIPPED WITH MACK RA23 OR RA24 REAR AXLES MAY CONTAIN REAR SUSPENSION SPRING SEATS THAT COULD DEFORM ON SPRING DEFLECTION RESULTING IN REDUCED CLAMPING FORCE. THIS COULD RESULT IN SPRING SLIP FAILURE ALLOWING THE AXLE TO DISLOCATE CAUSING TIRE/SPRING INTERFERENCE AND POSSIBLE LOSS OF VEHICLE CONTROL.
A failure of this component (not entered) may increase the risk of a crash or injury.
Authorized dealerships will inspect the vehicle and complete all necessary repairs free of charge (parts and labor).
TRUCKS EQUIPPED WITH MACK ENDT (B) 676, ETAZ (B) 673A AND ETAY (B) 673A ENGINES WITH AIRESEARCH TV6103 TURBO-CHARGERS. IN SOME INSTNACES OF TURBOCHARGER COMP[RESSOR WHEEL FAILURE THE CAPSCREWS RETAINING THE COMPRESSOR BACK PLATE MAY BE STRUCK BY PART OF THE COMP-RESSOR WHEEL. HTIS CAN RESULT IN THE CAPSCREWS BEING STRETCHED OR SHEARED, ALLOWING THE BACKPLATE TO DISLOCATE AND PRESSURIZED ENGINE OIL TO CONTACT THE HOT TURBOCHARGER TURBINE HOUSINGS AND/OR ENGINE EXHAUST MANIFOLD SECTIONS, THUS CREATING A POTENTIAL FOR ENGINE COMPARTMENT FIRE.
A failure of this component (not entered) may increase the risk of a crash or injury.
Authorized dealerships will inspect the vehicle and complete all necessary repairs free of charge (parts and labor).
ANTI-WHEEL LOCK VALVES SUPPLIED BY EATON CORPORATION MAY BE EXPOSED TO ACCUMULATED CONCENTRATIONS OF FLUID CONTAMINANTS IN THE AIR BRAKE SYSTEM THAT COULD CAUSE THE PISTON TO STICK THEREBY PREVENTING ANY AIR FROM BEING DELIVERED TO THE AIR BRAKE CHAMBERS SUPPLIED BY THAT VALVE. LTHIS CONDITION WILL RESULT IN A NO BRAKE APPLICATION ON THE AFFECTED AXLE, THEREBY EXTENDING VEHICLE STOPPING DISTANCES.
A failure of this component (not entered) may increase the risk of a crash or injury.
Authorized dealerships will inspect the vehicle and complete all necessary repairs free of charge (parts and labor).
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