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Mack Hmm Recalls

8 Transport Canada safety recalls for the Mack Hmm, model years 1972–1979. Tap any recall for the hazard, affected models, and corrective action.

Mack Hmm — Not Entered High risk

May 4, 1979 Model years: 1974, 1975, 1976, 1977, 1978, 1979

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

Also affects: Mack Dm, Mack Dmm, Mack F, Mack Mb, Mack R

Mack Hmm — Not Entered High risk

Dec 7, 1977 Model years: 1976, 1977

TRUCKS EQUIPPED WITH VIKING T-BAR SEATS. THE VIKING T-BAR SEATS HAVE FAILED TO COMPLY WITH C.M.V.S.S. 210 - SEAT BELT ANCHORAGES. A SEVERE VEHICLE DECELERATION COULD CAUSE THE SEAT

Mack Hmm — Not Entered High risk

Dec 2, 1977 Model years: 1977

VEHICLES EQUIPPED WITH SWTL56, SW56 OR SW57 SERIES BOGIES (TANDEM AXLES). THE WELDS SECURING THE REAR AXLE SPRING INSULATOR BRACKET TO THE AXLE HOUSING ARE IMPROPERLY POSITIONED AN

Also affects: Mack Rs, Mack Wl, Mack Ws, Mack Rl, Mack R

Mack Hmm — Not Entered High risk

Oct 27, 1977 Model years: 1972, 1973, 1974, 1975, 1976, 1977

TRUCKS EQUIPPED WITH MACK 6 CYLINDER ENGINES AND FLEXIBLE BLADE ENGINE COOLING FANS. THE FLEXIBLE BLADE FANS MAY DEVELOP FATIGUE CRACKS IN THE LAMINATED STIFFENER. CONTINUED ENGINE

Also affects: Mack Rl, Mack R, Mack Rm, Mack Dmm, Mack Rd

Mack Hmm — Not Entered High risk

Oct 27, 1977 Model years: 1977

TRUCKS EQUIPPED WITH CERTAIN SEAT BELT ASSEMBLIES MANUFACTURED BY INDIANA MILLS AND MANUFACTURING INC. THE SEAT BELT ASSEMBLIES, STYLE NO. IMM-385 AND B1000R-P, PERFORMED MARGINALL

Also affects: Mack Cf, Mack Dm, Mack Dmm, Mack F, Mack R

Mack Hmm — Not Entered High risk

Feb 8, 1977 Model years: 1976

VEHICLES ARE EQUIPPED WITH ROCKWELL INTERNATIONAL FDS 1807 OR 1808 FRONT DRIVE AXLES AND ROCKWELL MALLEABLE IRON WHEEL HUBS. (PART NO. 333-R-2382) A DESIGN DEFICIENCY EXISTS IN THE

Also affects: Mack Dmm, Mack Rm

Mack Hmm — Not Entered High risk

Aug 13, 1976 Model years: 1976

A MATERIAL DEFECT EXISTS IN THE BEARING CAPS OF THE CORDAN JOINT ASSEMBLY. FAILURE OF THIS JOINT CAN RESULT IN LOSS OF STEERING CONTROL WITHOUT WARNING.

Also affects: Mack Dmm, Mack Rm

Mack Hmm — Not Entered High risk

Aug 20, 1975 Model years: 1975

TRUCKS EQUIPPED WITH ROCKWELL MODEL FDS 1600 OR FDS 1802 FRONT DRIVING AXLE ASSEMBLIES FITTED WITH ROCKWELL ANTI-WHEEL LOCK SYSTEMS SOME ROCKWELL AXLE ASSEMBLIES EQUIPPED WITH ROCK

Also affects: Mack Dmm, Mack Rm

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