Mack Rs Recalls

Mack Rs — Brakes High risk

Aug 5, 1988 Model years: 1985, 1986

THESE VEHICLES DO NOT COMPLY WITH C.M.V.S.S. 106 - BRAKE HOSES (BURST STRENGTH).

Also affects: Mack Cf, Mack Dm, Mack Dmc, Mack Mc, Mack Mh

Mack Rs — Steering High risk

Nov 30, 1987 Model years: 1987

ON TRUCKS WITH MACK FA(W)616 OR 617 SERIES FRONT AXLE, THE CROSS STEERING LEVERS MAY BE IMPROPERLY HEAT-TREATED. THIS COULD REDUCE THEIR FATIQUE LIFE AND RESULT IN FAILURE. SUCH A

Also affects: Mack Rd, Mack Dm, Mack U, Mack Cf, Mack Rw

Mack Rs — Suspension High risk

Feb 9, 1987 Model years: 1981, 1982, 1983, 1984, 1985, 1986, 1987

NOTE: 1971 TO 1987 TRUCKS WITH NEWAY AIR RIDE DRIVE AXLE SUSPENSION. THE CHANNEL TYPE CROSSMEMBER INSTALLED WITH THE SUSPENSION CAN BE OVERSTRESSED AND CAN FAIL. THE BROKEN CROSSME

Also affects: Mack R, Mack Mr, Mack Fm, Mack Mh, Mack Rw

Mack Rs — Steering High risk

Jun 3, 1986 Model years: 1986

ON MODELS EQUIPPED WITH FA(W)617 FRONT AXLE AND 20,000 POUND TAPERLEAF SPRINGS IT IS POSSIBLE THAT THE DRAG LINK TO PITMAN ARM TOGGLE ANGLE COULD BE GREATER THAN THE ORIGINAL DESIG

Mack Rs — Structure High risk

Dec 4, 1985 Model years: 1979, 1980

THE RIGHT HAND FRAME RAIL LOWER FLANGE WAS CUT OUT OR TRIMMED ON THESE VEHICLES. BECAUSE OF POOR GRINDING METHODS USED TO ELIMINATE ALL STRESS RISING POINTS, THE FRAME COULD DEVELO

Also affects: Mack Rl

Mack Rs — Structure High risk

Sep 13, 1985 Model years: 1984

CRACKS IN THE AXLE BEAM ASSEMBLY MAY LEAD TO A FAILURE OF THE AXLE BEAM END UNDER NORMAL OPERATING CONDITIONS, CAUSING A COMPLETE SEPARATION OF THE WHEELS, TIRES, BRAKE ASSEMBLIES

Also affects: Mack Rw, Mack Rws, Mack Rwl, Mack Mh

Mack Rs — 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 Rs — 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 Rs — 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 Rwl, Mack Rws, Mack Wl, Mack Ws

Mack Rs — Not Entered High risk

Jan 26, 1981 Model years: 1977, 1978, 1979, 1980

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

Also affects: Mack F, Mack Rl

Mack Rs — Not Entered High risk

Jan 7, 1980 Model years: 1977, 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 Rwl, Mack Rws, Mack Wl, Mack Ws

Mack Rs — 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 Rm, Mack F, Mack Mb, Mack R, Mack Rl

Mack Rs — 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 Rwl, Mack Rws, Mack Wl, Mack Ws

Mack Rs — 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 Rs — Not Entered High risk

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

THE ADJUSTABLE STEERING COLUMN REAR MOUNTING BRACKET COULD FAIL, ALLOWING THE STEERING WHEEL ASSEMBLY TO FALL ONTO THE OPERATOR'S LAP. WHILE STEERING WOULD BE FUNCTIONAL THE SURPRI

Also affects: Mack Dm, Mack Rd, Mack Rl

Mack Rs — 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 Rs — Not Entered High risk

Oct 13, 1978 Model years: 1977, 1978

TRUCKS EQUIPPED WITH THE ABLE BODY COMPANY'S SLEEPER BOX. THE SLEEPER BOXES CONTAIN ELECTRICAL WIRING WHICH COULD CHAFE OR DISCONNECT CAUSING A FIRE HAZARD.

Also affects: Mack Rl, Mack Rwl, Mack Rws

Mack Rs — Not Entered High risk

Oct 5, 1978 Model years: 1977, 1978

TRUCKS EQUIPPED WITH BOGIE (TANDEM REAR) AXLES THAT ARE EQUIPPED TRUCKS EQUIPPED WITH BOGIE (TANDEM REAR) AXLES THAT ARE EQUIPPED WITH A SINGLE ANTI-WHEEL LOCK CONTROLLER. WHEEL SE

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

Mack Rs — 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 Wl, Mack Ws

Mack Rs — Not Entered High risk

Feb 16, 1978 Model years: 1972, 1973

TRUCKS EQUIPPED WITH ROCKWELL INTERNATIONAL FF921 FRONT AXLES AND CAST ALUMINUM WHEEL HUBS. THERE IS A POSSIBILITY OF CRACKING IN THE AREA OF THE WHEEL MOUNMTING FLANGE AND/OR INNE

Also affects: Mack Fl, Mack Fs, Mack Rl

Mack Rs — 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 Wl, Mack Ws, Mack Rl, Mack R, Mack Mb

Mack Rs — Not Entered High risk

Dec 2, 1977 Model years: 1967

VEHICLES EQUIPPED WITH FE970 FRONT AXLES AND WHEEL DISCS AND ROCKWELL INTERNATIONAL MALLEABLE STEEL FRONT AXLE WHEEL HUBS. A DESIGN DEFICIENCY EXISTS IN THE ROCKWELL MALLEABLE IRON

Also affects: Mack Fl, Mack Fs, Mack R, Mack Rl

Mack Rs — 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 Rs — 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 Wl, Mack Ws

Mack Rs — 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 Wl, Mack Ws

Mack Rs — 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 Wl, Mack Ws

Mack Rs — 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 Wl, Mack Ws

Mack Rs — 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 Wl, Mack Ws

Mack Rs — 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 Wl, Mack Ws

Mack Rs — 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 Wl, Mack Ws

Mack Rs — Not Entered High risk

May 6, 1975 Model years: 1973, 1974, 1975

THE ROAD LAMP CIRCUIT WAS WIRED PARALLEL WITH THE HEADLAMPS. THIS COULD CAUSE MEMENTARY LOSS OF FORWARD ILLUMINATION, AS A RESULT OF COMBINED ELECTRICAL CIRCUIT OVERLOAD.

Also affects: Mack Fs, Mack Rl

Mack Rs — 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 Wl, Mack Ws