Mack Wl — Not Entered
High risk
Apr 5, 1984
Model years: 1978, 1979, 1980, 1981, 1982
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 COUL
Also affects: Mack Cf, Mack F, Mack Fm, Mack Mb, Mack Mc
Mack Wl — Not Entered
High risk
Mar 27, 1984
Model years: 1983, 1984
IT IS POSSIBLE THAT IMPROPER STEERING SHAFT CLAMP BOLTS WERE INSTALLED AND TORQUED TO THE WRONG SPECIFICATIONS. BECAUSE OF THE OVERLOADED CLAMPING FORCE APPLIED TO THE BOLT, THE BO
Also affects: Mack Dm, Mack Mc, Mack Mh, Mack Mr, Mack Rd
Mack Wl — Not Entered
High risk
Apr 11, 1983
Model years: 1980, 1981
TRUCKS EQUIPPED WITH AXLE MOUNTED ROSS HFB 70 INTEGRAL POWER STEERING. THE STEERING GEAR PITMAN ARM BALL STUD MAY LOOSEN OR BREAK IN ITS TAPERED BORE AS A RESULT OF NOT BEING PROPE
Also affects: Mack Rwl, Mack Rws, Mack Ws
Mack Wl — Not Entered
High risk
Aug 19, 1981
Model years: 1980, 1981
INADEQUATE WELD EMPLACEMENT OF THE SPRING SEAT/RADIUS ROD BRACKET COUPLED WITH RADIUS ROD LOAD AND LOOSENING OF THE SPRING CLIP NUTS COULD CAUSE SPRING SEAT FRACTURE WHICH COULD RE
Also affects: Mack Rl, Mack Rs, Mack Rwl, Mack Rws, Mack Ws
Mack Wl — Not Entered
High risk
Jul 9, 1981
Model years: 1978, 1979, 1980, 1981
ENGINE SUPPORT BRACKET MAY DEVELOP CRACKS DUE TO A DEFICIENCY IN MATERIAL PROPERTIES. COMPLETE FRACTURE COULD CAUSE THE ENGINE TO DROP DOWN INTO THE RADIATOR, DAMAGING THE SHROUD,
Also affects: Mack Rwl, Mack Rws, Mack Ws
Mack Wl — Not Entered
High risk
Mar 10, 1980
Model years: 1979, 1980
THE VEHICLE CERFIFICATION LABELS ARE MISLOCATED. THESE VEHICLES DO NOT COMPLY WITH CANADA MOTOR VEHICLE SAFETY REGULATION 6 - STATEMENT OF COMPLIANCE.
Also affects: Mack Ws
Mack Wl — Not Entered
High risk
Jan 7, 1980
Model years: 1978, 1979
VEHICLES EQUIPPED WITH TAPER LEAF FRONT SPRINGS MAY HAVE ALUMINUM FRONT SPRING REAR BRAKCETS WITH INADEQUATE STRENGTH TO WITHSTAND NORMAL SIDE LOADINGS. FAILURE OF THE BRACKET COUL
Also affects: Mack Rl, Mack Rs, Mack Rwl, Mack Rws, Mack Ws
Mack Wl — Not Entered
High risk
Jan 2, 1980
Model years: 1977, 1978, 1979
THE CAB ELECTRICAL FEED CABLES MAY HAVE BEEN INSTALLED WITH INADEQUATE CRIMPING OF THE CABLE AT THE CABLE TERMINAL. THIS CONDITION COULD RESULT IN SEPARATION OF THE CABLE FROM THE
Also affects: Mack Ws
Mack Wl — Not Entered
High risk
Jan 2, 1980
Model years: 1978, 1979
TRUCKS EQUIPPED WITH ANCHORLOK AIR SUSPENSION SEATS. VEHICLES EQUIPPED WITH ANCHORLOK AIR SUSPENSION SEATS HAVE TETHER BELT MOUNTING BRACKETS WHICH COULD ALLOW THE SEAT UPPER BASE
Also affects: Mack Ws
Mack Wl — Not Entered
High risk
Jul 12, 1979
Model years: 1978, 1979
THE FLANGE HEAD PINCH BOLTS USED IN THE YOKES OF THE STEERING SHAFT ASSEMBLIES MAY HAVE BEEN OVERSTRESSED DUE TO IMPROPER TORQUE SPECIFICATIONS. THIS COULD RESULT IN BREAKAGE OF TH
Also affects: Mack Rl, Mack Rs, Mack Rwl, Mack Rws, Mack Ws
Mack Wl — Not Entered
High risk
Jul 12, 1979
Model years: 1978, 1979
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 ULTIMATEL
Also affects: Mack Rs, Mack Rm, Mack F, Mack Mb, Mack R
Mack Wl — Not Entered
High risk
Jul 12, 1979
Model years: 1978
VEHICLES EQUIPPED WITH FF931, FAW536 OR RAW537 STEERING AXLES WITH SHEPPARD STEERING GEARS MAY NOT HAVE THE PITMAN ARM RETAINING SCREWS TORQUED TO SPECIFICATION. THS RETAINING SCRE
Also affects: Mack Rwl, Mack Rws, Mack Ws
Mack Wl — Not Entered
High risk
Jun 4, 1979
Model years: 1977, 1978, 1979
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 T
Also affects: Mack Dm, Mack Dmm, Mack F, Mack Md, Mack Mr
Mack Wl — Not Entered
High risk
May 29, 1979
Model years: 1977, 1978, 1979
TRUCKS EQUIPPED WITH MANUAL STEERING. SUBJECT VEHICLES MAY HAVE BEEN BUILT WITH PITMAN ARM RETAINING NUTS THAT WERE NOT TORQUED TO SPECIFICATION. THIS CONDITION COULD RESULT IN INA
Also affects: Mack Rwl, Mack Rws, Mack Ws
Mack Wl — 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 Hmm, Mack Mb
Mack Wl — Not Entered
High risk
Aug 21, 1978
Model years: 1975, 1976, 1977, 1978
VEHICLES EQUIPPED WITH CUMMINS NTC - SERIES ENGINES AND FULLER RT OR SPICER SST SERIES TRANSMISSIONS. INVOLVED VEHICLES HAVE ALUMINUM ENGINE REAR SUPPORT BRACKETS WHICH MAY FAIL AL
Also affects: Mack Rwl, Mack Rws, Mack Ws
Mack Wl — Not Entered
High risk
Apr 3, 1978
Model years: 1974, 1975, 1976
THE EATON MODEL 21 ANTI-WHEEL LOCK CONTROLLER MAY MALFUNCTION AND PREVENT APPLICATION OF THE BRAKE ON THE AXLE CONTROLLED BY THE DEFECTIVE CONTROLLER. A "NO BRAKE" SITUATION MAY DE
Also affects: Mack Dmm, Mack F, Mack R, Mack Rd, Mack Rl
Mack Wl — Not Entered
High risk
Feb 16, 1978
Model years: 1976, 1977, 1978
TRUCKS EQUIPPED WITH ANCHORLOCK AIR DRYERS. A DESIGN DEFICIENCY EXISTS IN THE AIR DRYER PIPING THAT CAN ALLOW MOISTURE FROM THE COMPRESSED AIR TO FREEZE ALLOWING A BUILD UP OF EXCE
Also affects: Mack Rl, Mack Rs, Mack Ws
Mack Wl — 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 Ws, Mack Rl, Mack R, Mack Mb
Mack Wl — 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 Hmm, Mack Dmm
Mack Wl — Not Entered
High risk
Sep 22, 1977
Model years: 1975, 1976, 1977
TRUCKS EQUIPPED WITH FL-931 FRONT AXLES WITH DISC WHEELS AND ROCKWELL INTERNATIONAL ALUMINUM FRONT WHEEL HUBS. ROCKWELL INTERNATIONAL HAS DETERMINED THAT A DEFICIENCY EXISTS IN ITS
Also affects: Mack Dm, Mack Rl, Mack Rs, Mack Ws
Mack Wl — Not Entered
High risk
Sep 22, 1977
Model years: 1976, 1977
TRUCKS EQUIPPED WITH FF-931 FRONT AXLES AND MOTOR WHEEL CORPORATION ALUMINUM WHEEL HUBS. MOTOR WHEEL CORPORATION HAS DETERMINED THAT SOME OF ITS HUBS ARE SUBJECT TO FAILURE FROM A
Also affects: Mack Rl, Mack Rs, Mack Ws
Mack Wl — Not Entered
High risk
May 10, 1977
Model years: 1975, 1976
VEHICLES EQUIPPED WITH ROCKWELL INTERNATIONAL FF931C FRONT AXLES AND S-=CAM BRAKES. THE BRAKE SPIDER MAY FAIL ALLOWING SEPARATION OF THAT PORTION THAT RETAINS THE BRAKE CAMSHAFT, B
Also affects: Mack Ws
Mack Wl — Not Entered
High risk
Mar 9, 1977
Model years: 1975, 1976
VEHICLES BUILT FROM JANUARY 1, 1975 TO FEBRUARY 4, 1977 AND EQUIPPED WITH ROSS HFB70 SERIES POWER STEERING. THE ROSS HFB70 POWER STEERING SYSTEM IS SUSCEPTIBLE TO FAILURE AT THE IN
Also affects: Mack Ws
Mack Wl — Not Entered
High risk
Feb 8, 1977
Model years: 1975, 1976
THE LOWER STEERING SHAFT LOWER YOKE CLMAP BOLT MAY NOT HAVE BEEN TORQUED TO SPECIFICATION DURING MANUFACTURE. THIS COULD LEAD TO DISENGAGEMENT OF THE LOWER STEERING SHAFT FROM THE
Also affects: Mack Ws
Mack Wl — Not Entered
High risk
Nov 17, 1976
Model years: 1975, 1976
VEHICLES EQUIPPED WITH FORGED ALUMINUM HUBS ON ROCKWELL FF931 AXLES WITH DISC WHEELS. LTHE FORGED ALUMINUM FRONT WHEEL HUBS HAVE A DESIGN DEFICIENCY IN THE BARREL BETWEEN THE INNER
Also affects: Mack Rl, Mack Rs, Mack Ws
Mack Wl — Not Entered
High risk
Jun 14, 1976
Model years: 1974, 1975
VEHICLES EQUIPPED WITH FA536C OR FA537C FRONT AXLES. FRONT AXLE MOUNTED BRAKE CHAMBERS MAY CONTACT THE CAB TILT CYULINDERS CAUSING DAMAGE THAT COULD MAKE THE FRONT AXLE BRAKING ACT
Also affects: Mack Ws
Mack Wl — Not Entered
High risk
Apr 14, 1976
Model years: 1973, 1974, 1975
VEHICLES EQUIPPED WITH ROCKWELL INTERNATIONAL FRONT AXLE FORGED ALUMINUM HUBS. THE SUSPECT ROCKWELL HUBS (PART NUMBER 333-Y-2209X) CONTAIN A DESIGN DEFICIENCY IN THE AREA OF THE WH
Also affects: Mack Fl, Mack Fs, Mack Rl, Mack Rs, Mack Ws
Mack Wl — Not Entered
High risk
Jan 20, 1976
Model years: 1975
VEHICLES EQUIPPED WITH EATON SKID CONTROL SYSTEM AND ROCKWELL INTERNATIONAL FF931 OR FL931W FRONT AXLES WITH ALUMINUM WHEEL HUBS ERECTED BETWEEN MARCH 18, 1975 AND DECEMBER 11, 197
Also affects: Mack Rl, Mack Rs, Mack Ws
Mack Wl — Not Entered
High risk
Aug 25, 1975
Model years: 1974, 1975
THE CLAMP AROUND THE STEERINTG COLUMN MAY BE INCORRECTLY POSITIONED, WHICH COULD RESULT IN THE STEERING SHAFT SPLINE ENGAGEMENT BEING LESS THAN SPECIFIED. THIS COULD RESULT IN STEE
Also affects: Mack Ws
Mack Wl — Not Entered
High risk
Aug 22, 1975
Model years: 1975
THE REINFORCEMENT INSERTS SPECIFIED IN THE CONNECTORS USED WITH THE SYNFLEX SERVICE BRAKE HOSES TO THE BOGIE WHEELS MAY HAVE BEEN OMITTED. THIS COULD RESULT IN INADEQUATE RETENTION
Also affects: Mack Rl, Mack Rs, Mack Ws
Mack Wl — Not Entered
High risk
Aug 21, 1975
Model years: 1974, 1975
THE TRAILER SUPPLY CONTROL VALVE EXHAUST PORT MAY HAVE INADVERTENTLY PLUGGED AND THE SAFETY VALVE ON THE AIR RESERVOIR MAY HAVE BEEN OMITTED. IF THE TRAILER SUPPLY CONTROL VALVE EX
Also affects: Mack Rl, Mack Rs, Mack Ws
Mack Wl — Not Entered
High risk
Apr 22, 1975
Model years: 1974
VEHICLES EQUIPPED WITH SW56, 57 AND 76 SERIES BOGIES. INTERFERENCE BETWEEN INSIDE PORTION OF WHEEL AND OUTER EDGE OF BRAKE DRUM, RESULTING IN WHEEL NUT CLEARING THE RIM, ALLOWING R
Also affects: Mack Fl, Mack Fs, Mack Rl, Mack Rs, Mack Ws
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