1971 Mack F Recalls

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NHTSA Campaign Number: 78V171000
Manufacturer: Mack Trucks, Inc.
Date of Owner Notification: August 10th, 1979

Defect Summary:
DEFICIENCIES, IN THE FORM OF FORGING LAPS, CRACKS AND EXCESSIVE DECARBURIZATION DURING HEAT TREATMENT, EXIST IN THE STEERING KNUCKLES. STRESSES IMPOSED WITH INTEGRAL HYDRAULIC POWER STEERING MAY LEAD TO A FAILURE IN THE AREA OF THE STEERING ARM ATTACHING BOSS. THIS TYPE OF FAILURE WOULD CAUSE LOSS OF STEERING CONTROL.

Corrective Summary:
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE LEFT STEERING KNUCKLE WITH AN IMPROVED TYPE OF KNUCKLE.

Recall Notes:
VEHICLE DESCRIPTION: TRUCK TRACTORS.SYSTEM: STEERING; STEERING KNUCKLE.CONSEQUENCES OF DEFECT: LOSS OF STEERING CONTROL COULD CAUSE A VEHICLEACCIDENT.

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NHTSA Campaign Number: 71V219000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: January 1st, 1971
Manufactured End Date: June 1st, 1971
Date of Owner Notification: March 6th, 1972

Recall Notes:
MACK CAMPAIGN NO SC028.CHASSIS CA47 OR CAS48.JAN.1971 TH RU JUNE 1971.TRUCK TRACTORS.POSSIBILITY THAT RIGHT HAND SP LASH APRON MAY CONTACT RIGHTHAND AIR BRAKE HOSE, WHICH WOULDCAUSE CHAFING ACTION RESULTING IN WEARINGTHROUGH OF THE AIR H OSE CAUSING REDUCED BRAKING EFFECIENCY.(CORRECT BYINSPECTIN G AND REMOVING PORTION OF SPLASH SHIELD TO PRECLUDE ANY POSSIB LECONTACT WITH FUEL RETURN LINE.)

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NHTSA Campaign Number: 74V032000
Manufacturer: Mack Trucks, Inc.
Date of Owner Notification: August 13th, 1974

Recall Notes:
MACK TRUCKS CAMPAIGN NO N/A.WITH SN56 AND SW57 BOGIE HOUSINGS.BUILT MAR1971 THRU JUN 1972.TRUCKS.POSSIBILITY THAT THE BOGIE HOUSING WALL THICKNESSAT THE LEFT INNER WHEEL BEARING RACE MAY NOT MEET SPECIFIC DIMENSIONALREQUIREMENTS.IF THIS CONDITION EXISTS, IT COULD LEAD TO SPINDLE FAILURE,RESULTING IN LOSS OF A REAR WHEEL ASSEMBLY.(CORRECT BY INSPECTING ANDREPLACING BRGIE HOUSING WHERE NECESSARY).

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NHTSA Campaign Number: 72V127000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: August 1st, 1970
Manufactured End Date: September 1st, 1971
Date of Owner Notification: July 24th, 1972

Recall Notes:
MACK SERVICE BULLETIN NO G1003.EQUIPPED WITH AMERICAN-BOSCH APE-8VBB FUELINJECTION PUMP.MANFD 9-70 THRU 10-16 1971.TRUCKS.POSSIBILITY THAT LINKCONNECTING GOVERNOR FULCRUM LEVER TO FUEL INJECTION PUMP CONTROL RACKS CANBREAK AND CAUSE LOSS OF FUEL DELIVERY CONTROLTO ENGINE.SHOULD THIS CONDITIONOCCUR, IT COULD IMPAIR VEHICLE CONTROL.(CORRECT BY INSPECTING AND INSTALLINGSPRING CLIP ON FULCRUM LEVER TO PREVENT ENGINE OVERSPEED.)

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NHTSA Campaign Number: 75V118000
Manufacturer: Mack Trucks, Inc.
Date of Owner Notification: November 11th, 1975

Recall Notes:
MACK TRUCKS CAMPAIGN NO SC060.TRUCKS MFG'D 1967 THRU JAN.31, 1973.POSSIBILITY THAT THE SUSPENSION TRUNNION BRACKETS MAY DEVELOP CRACKS.IF SUCHCONDITION EXISTS AND CRACKS ARE NOT DETECTED, CONTINUED OPERATION COULDULTIMATELY LEAD TO TRUNNION TUBE SEPARATION FROM THE TRUNNION AND PERMIT AXLEASSEMBLY DISLOCATION.FAILURE OF THE TRUNNION BRACKET COULD RESULT IN LOSS OFVEHICLE CONTROL WITHOUT WARNING TO THE DRIVER.(CORRECT BY INSPECTING ANDREPLACING BRACKETS WHERE NECESSARY).

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NHTSA Campaign Number: 72V040000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: January 1st, 1971
Manufactured End Date: December 1st, 1971
Date of Owner Notification: April 24th, 1972

Recall Notes:
MACK CAMPAIGN NO X1001.TRUCKS.W/SGP45 & SGP47 POWER STEERING GEARS.POSSIBILITY THAT BUMPER DEFORMATION CAUSED BY IMPACT MAY RESULT IN INTERFERENCEBETWEEN BUMPER AND STEERING COLUMN UNIVERSAL JOINT.(CORRECT BY INSPECTING ANDREINFORCING AS REQUIRED.)