1971 Mack Mb 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: 71V226000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: September 1st, 1970
Manufactured End Date: April 1st, 1971
Date of Owner Notification: January 27th, 1972

Recall Notes:
MACK TRUCK CAMPAIGN NO U1001.SEPT.22, 1970 THRU APRIL 6, 1 971.TRUCKS.POSSIBILITY THAT FRONT HUB MAY BE DEFECTIVE.F AILURE OF FRONT AXLE HUB COULDRESULT IN LOSS OF VEHICLE CONTR OL.(CORRECT BY INSPECTING AND REPLACING HUBWHERE NECESSARY. ) VEHICLE CHASSIS WITH ROCKWELL-STANDARD FH901 OR FL901 FRONT AXL

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NHTSA Campaign Number: 71V179000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: December 1st, 1968
Manufactured End Date: May 1st, 1971
Date of Owner Notification: October 6th, 1971

Recall Notes:
BUILT BTWN DEC.1968 AND MAY 1971.TRUCK TRACTORS.POSSIBIL ITY THAT AIRINTAKE HOOD, WHICH CONSISTS OF METAL CAP ATTACHEDTO PERFORATED PLASTIC INNERSECTION, MAY NOT SECURELY CLAMP T O PLASTIC SECTION.IF CONDITION EXISTS, CAPCAN TURN AND CUTPLASTIC.IF PLASTIC IS DEEPLY CUT, METAL CAP CAN SEPARATECOM PLETELY.SUCH FAILURE, PARTICULARLY AT HIGH SPEEDS, COULD CRE ATEPOTENTIAL RISK TO SAFETY OF OTHER HIGHWAY USERS.(CORRECTBY INSPECTING ANDREPLACING WITH IMPROVED AIR INTAKE HOOD WHE RE NECESSARY.)

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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: 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).