Mack R Recalls

Mack R — Steering High risk

Nov 17, 1994 Model years: 1990

THE STEERING ARMS ON THESE VEHICLES COULD DEVELOP CRACKS WHICH COULD PROLIFERATE AND EVENTUALLY CAUSE THE ARM TO BREAK WITHOUT WARNING. WHEN MANUFACTURED THESE LEVERS WERE NOT PEEN

Also affects: Mack Mc, Mack Mr, Mack Rd

Mack R — Suspension High risk

May 21, 1991 Model years: 1988, 1989, 1990

ON VEHICLES USED IN LOGGING OPERATIONS, CERTAIN HENDRICKSON SUSPENSION SPRING HANGER BRACKETS MAY FRACTURE. SPRING HANGER FAILURE COULD CAUSE SEPARATION OF VEHICLE COMPONENTS AND R

Also affects: Mack Ch, Mack Cl, Mack Mh, Mack Rb, Mack Rd

Mack R — Visual System High risk

Apr 4, 1990 Model years: 1989

A TOLERANCE MISMATCH IN THE CRANK ASSEMBLY OF THE ROBERT BOSCH WINDSHIELD WIPER MOTOR SYSTEM COULD CAUSE INSTANTANEOUS SEPARATION OF THE CRANK FROM THE LINKAGE ASSEMBLY IN THE LEFT

Also affects: Mack Dm, Mack Dmm, Mack Rb, Mack Rd, Mack Rm

Mack R — Structure High risk

Jan 9, 1990 Model years: 1987, 1988

AN INSUFFICIENT WELD WHERE THE STEP IS WELDED TO THE FUEL TANK COULD EVENTUALLLY CAUSE COMPLETE STEP DISENGAGEMENT AND POSSIBLE INJURY TO PERSONS WHO COULD FALL OFF A BROKEN STEP W

Also affects: Mack Rd

Mack R — Steering High risk

Jan 9, 1990 Model years: 1987, 1988

THE HIGH PRESSURE POWER STEERING HOSE MAY NOT MEET THE RATED BURST STRENGTH PRESSURE REQUIREMENTS. HOSE FAILURE WITH SUBSEQUENT LOSS OF STEERING POWER ASSIST AND INCREASED STEERING

Also affects: Mack Dm, Mack Dmm, Mack Rd, Mack Rm, Mack Rw

Mack R — Steering High risk

Jun 14, 1989 Model years: 1987, 1988, 1989

NOTE: VEHICLES MANUFACTURED AT THE WINNSBORO, SOUTH CAROLINA FACILITY. THE STEERING WHEEL RETAINING NUTS MAY HAVE BEEN IMPROPERLY INSTALLED AND/OR TORQUED. IF EITHER OF THESE PROCE

Also affects: Mack Ch, Mack Dm, Mack Rd, Mack U

Mack R — Suspension High risk

May 23, 1989 Model years: 1989

THE REYCO SUSPENSION TORQUE ROD BOLTS ON THESE VEHICLES ARE NOT TO SPECIFICATION. THE BOLTS HAVE NO MARKINGS, INDICATING THAT THEY ARE GRADE 2 INSTEAD OF THE REQUIRED GRADE 5. FAIL

Also affects: Mack Mh, Mack Rw

Mack R — 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 R — Steering High risk

Aug 5, 1988 Model years: 1987, 1988

SOME OF THE NUTS/BOLTS USED TO FASTEN THE STEERING PITMAN ARM MAY LOOSEN AND COULD CAUSE LOSS OF STEERING CONTROL AND A VEHICLE CRASH WITHOUT PRIOR WARNING. CORRECTION: THE NUTS/BO

Also affects: Mack Dm, Mack Dmm, Mack Rd, Mack Rm, Mack U

Mack R — Powertrain High risk

Jun 2, 1988 Model years: 1987

THE CLAMP PLATES BETWEEN THE DRIVE SHAFT AND CARRIER YOKE COULD CRACK. A BROKEN CLAMP PLATE WOULD RESULT IN THE YOKE FLYING OFF AT THE DETACHED POINT. THIS COULD CAUSE INJURY FROM

Also affects: Mack Dm, Mack Dmm, Mack Rd, Mack Rm, Mack U

Mack R — Suspension High risk

Feb 16, 1987 Model years: 1985, 1986

THE ALUMINUM WHEELS ON THESE TRUCKS MAY HAVE PILOT BORES BELOW THE MINIMUM SPECIFIED DIAMETER. IN SOME CASES THIS COULD INTERFERE WITH PROPER MOUNTING AND CAUSE WHEELS TO RUN LOOSE

Mack R — 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 Mr, Mack Rs, Mack Fm, Mack Mh, Mack Rw

Mack R — Emissions High risk

Apr 23, 1986 Model years: 1984, 1985

THESE VEHICLE MAY NOT COMPLY WITH C.M.V.S.S. 1101 - EMISSION DEVICE.

Also affects: Mack Rd690

Mack R — Structure High risk

Jan 22, 1986 Model years: 1982, 1983, 1984, 1985, 1986

THE ACCELERATOR ROD TO ACCELERATOR ROD HOLE CLEARANCE IS NOT ADEQUATE AND CAN CAUSE BINDING TO OCCUR DUE TO CAB ARTICULATION. IF THIS BINDING IS PRESENT WHILE IN A FULL THROTTLE PO

Also affects: Mack Rd

Mack R — Not Entered High risk

Jul 29, 1985 Model years: 1984, 1985

THE HOLE IN THE THROTTLE LEVER AND THE STOP PIN MAY BE MISMATCHED, WHICH COULD ALLOW THE PIN TO LOOSEN AND FALL OUT. SHOULD THIS HAPPEN THE TENSION SPRING ATTACHED TO THE THROTTLE

Also affects: Mack Mh, Mack Mr, Mack Rw

Mack R — 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 R — Not Entered High risk

Jan 19, 1982 Model years: 1977, 1978, 1979, 1980, 1981

VEHICLES DO NOT COMPLY WITH CMVSS 108 - LIGHTING.

Also affects: Mack Rd, Mack Rm400, Mack Rm600

Mack R — Not Entered High risk

Jan 19, 1982 Model years: 1981

THE PITMAN ARM RETAINING BOLT MAY NOT BE TORQUED TO SPECIFICATION. THIS COULD ALLOW THE PITMAN ARM TO LOOSEN AND IF NOT CORRECTED COULD EVENTUALLY CASUE LOSS OF STEERING CONTROL.

Also affects: Mack Mc, Mack Mr, Mack Rd

Mack R — Not Entered High risk

Jul 9, 1981 Model years: 1979, 1980

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 IN

Also affects: Mack F, Mack Mc, Mack U

Mack R — Not Entered High risk

Dec 12, 1980 Model years: 1980

VEHICLES EQUIPPED WITH DANA UPPER STEERING SHAFTS THAT WERE INCORRECTLY MACHINE WELDED WHERE THE FEMALE SPLINE CONNECTS TO THE TUBE ASSEMBLY. THIS CONDITION MAY RESULT IN SEPARATIO

Also affects: Mack Rd

Mack R — Not Entered High risk

May 8, 1980 Model years: 1970, 1971, 1972, 1973, 1974, 1975, 1976

RADIUS OF THE TAPER AT THE STEERING KNUCKLE END. THIS CONDITION MAY CAUSE STEERING ARM FAILURE WITHOUT PRIOR WARNING.

Also affects: Mack Fap, Mack Fc, Mack Fcs, Mack F, Mack Fca

Mack R — Not Entered High risk

May 8, 1980 Model years: 1976, 1977, 1978, 1979, 1980

VEHICLES MAY BE EQUIPPED WITH A DANA CORPORATION LOWER STEERING SHAFT IN WHICH THE PINCH BOLT CLAMP MAY DEFORM RESULTING IN A LOSS OF CLAMPING FORCE AND DISLOCATION OF THE PINCH BO

Also affects: Mack U

Mack R — Not Entered High risk

May 8, 1980 Model years: 1979, 1980

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

Also affects: Mack F, Mack Mc, Mack U

Mack R — Not Entered High risk

Jul 12, 1979 Model years: 1979

SPICER MODEL SG46 MANUAL STEERING GEAR ASSEMBLIES MAY HAVE THE PINCH BOLT HOLE CENTER TO STEERING GEAR INPUT SHAFT CENTER ON THE LOWER YOKE DIMENSION EXCEEDING SPECIFICATION SUCH T

Mack R — 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 Rl

Mack R — 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 R — 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 R — Not Entered High risk

Apr 3, 1979 Model years: 1977, 1978

TRUCKS EQUIPPED WITH EITHER AN SGPS47 OR SGP49 STEERING SYSTEM. AN IMPROPER PINCH BOLT AND NUT MAY HAVE BEEN USED TO CLAMP THE STEERING SHAFT TO THE STEERING GEAR INPUT SHAFT. THS

Also affects: Mack Dm, Mack Rd

Mack R — Not Entered High risk

Jan 16, 1979 Model years: 1978

TRUCKS EQUIPPED WITH MACK SH34 OR SH38 BOGIE SUSPENSIONS. THE BEAM HANGER BRACKETS MADE BY SUPERIOR STEEL CASTINGS HAVE LOW MECHANICAL PROPERTIES AND EXCESSIVE SHRINKAGE. FAILURE O

Also affects: Mack Dmm, Mack F, Mack Mb, Mack Rd

Mack R — Not Entered High risk

Jan 16, 1979 Model years: 1977, 1978

TRUCKS WITH MACK SW57,SW76,S38,OR S44 TANDEM AXLES. A CASTING DEFECT IN THE BOGIE SPRING INSULATOR CAP CAN ALLOW THE END OF THE REAR SPRING TO DETACH FROM THE AXLE HOUSING RESULTIN

Also affects: Mack Dm, Mack Rd, Mack U

Mack R — Not Entered High risk

Nov 3, 1978 Model years: 1977, 1978

TRUCKS EQUIPPED WITH BENDIX ANTI-WHEEL LOCK ELECTRONIC CONTROLLERS. A DIODE FAILURE WHTHIN THE ELECTRONIC CONTROLLER MAY BLOCK AIR PRESSURE TO THE BRAKE CHAMBERS RESULTING IN A NO-

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

Mack R — 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 R — Not Entered High risk

Aug 21, 1978 Model years: 1971, 1972, 1973, 1974

VEHICLES E3QUIPPED WITH MACK FA534 SERIES FRONT STEERING AXLES AND INTEGRAL HYDRAULIC POWER STEERING. THE STEERING KNUCKLES MAY HAVE A REDUCED FATIGUE LIFE AS A RESULT OF IMPROPER

Also affects: Mack F, Mack Mb, Mack U

Mack R — 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 Rd, Mack Rl, Mack Wl

Mack R — Not Entered High risk

Feb 16, 1978 Model years: 1976, 1977, 1978

TRUCKS EQUIPPED WITH MACK V-8 ENGINES. THE SYNFLEX-TYPE OIL PRESSURE SIGNAL LINE MKAY BE ROUTED TOO CLOSE TO THE EXHAUST MANIFOLD. EXCESSIVE HEAT COULD CAUSE THE LINE TO RUPTURE AN

Also affects: Mack Dm, Mack Rd

Mack R — Not Entered High risk

Feb 16, 1978 Model years: 1975, 1976, 1977, 1978

TRUCKS EQUIPPED WITH SW56 OR SW57 SERIES HIGHWAY BOGIES (TANDEM AXLES). THE BRAKE HOSE BRACKET MOUNTED ON THE FRONT AXLE OF THE BOGIE MAY FAIL LEAVING THE BRAKE TEE UNSUPPORTED. TH

Also affects: Mack U

Mack R — 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 Rl, Mack Rs

Mack R — 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 Mb

Mack R — 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 Hmm

Mack R — 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 Rm, Mack Hmm, Mack Dmm, Mack Rd

Mack R — Not Entered High risk

Jul 11, 1977 Model years: 1977

TRUCKS EQUIPPED WITH DAYTON-WALTHER FRONT WHEELS AND MACK FA617C OR FAW617 FRONT AXLES. THE DAYTON-WALTHER FRONT WHEEL STUDS WERE NOT PROPERLY HEAT TREATED AND ARE SUBJECT TO CRACK

Also affects: Mack Cf, Mack Dm, Mack F, Mack Mb, Mack Rd

Mack R — Not Entered High risk

Dec 1, 1975 Model years: 1974, 1975

THE PRIMARY AND SECONDARY AIR SUPPLY LINES MAY HAVE BEEN CONNECTED IN REVERSE AT THE DUAL BRAKE TREADLE VALVE.

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

Mack R — Not Entered High risk

Jun 30, 1975 Model years: 1967, 1968, 1969, 1970, 1971, 1972, 1973

VEHICLES EQUIPPED WITH SW56, 78, 82 AND 86 SERIES REAR AXLES. THE REAR AXLE TRUNNION BRACKET MAY DEVELOP CRACKS. IF THE CRACKS ARE NOT DETECTED, CONTINUED OPERATION COULD ULTIMATEL

Also affects: Mack Dm, Mack F, Mack Mb, Mack U