1972 Mack Rl Recalls

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NHTSA Campaign Number: 77V173000
Manufacturer: Mack Trucks, Inc.
Date of Owner Notification: March 23rd, 1978

Defect Summary:
THE FLEX BLADE FANS ON THE INVOLVED VEHICLES MAY DEVELOP CRACKS IN THE LAMINATED STIFFENER AS A RESULT OF FATIGUE DURING OPERATION. IF SUCH A CONDITION EXISTS AND THE CRACKS GO UNDETECTED, CONTINUED OPERATION COULD CAUSE PIECES OF THE STIFFENER TO BREAK OFF.

Corrective Summary:
DEALER WILL REPLACE THE ORIGINAL FAN WITH A STEEL FIXED BLADE FAN, FREE OF CHARGE.

Recall Notes:
VEHICLE DESCRIPTION: TRUCKS EQUIPPED WITH SIX-CYLINDER ENGINES.SYSTEM: ENGINE COOLING; FAN.CONSEQUENCES OF DEFECT: BROKEN PIECES CAN BE PROPELLED OUTSIDE OF THE FANSHROUD AND WILL PRESENT AN IMMEDIATE DANGER AND POSSIBLE INJURY TO PERSONSSTANDING NEARBY.NOTE: PRIOR TO CORRECTION, VEHICLE SHOULD NOT BE SERVICED WITH THE HOOD RAISEDAND THE ENGINE RUNNING.

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NHTSA Campaign Number: 72V310000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: July 1st, 1969
Manufactured End Date: August 1st, 1972
Date of Owner Notification: April 27th, 1973

Recall Notes:
MACK TRUCK CAMPAIGN NO SCO 38.MANFD 7/22/1972 THRU 8/21/72.TRUCKS.POSSIBILITY THAT FRONT SHOCK ABSORBER MOUNTING BRACKET MAY FAIL.IF CONDITIONEXISTS, IT COULD ALLOW SHOCK ABSORBER TO INTERFERE WITH STEERING LINKAGE.(CORRECT BY INSPECTING AND INSTALLING IMPROVED LOWER SHOCK ABSORBER MOUNTINGBRACKETS WHERE NECESSARY).MODELS EQUIPPED WITH 1200 AND 1400 SQ IN RADIATORS.

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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: 73V153000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: February 1st, 1971
Manufactured End Date: June 1st, 1973
Date of Owner Notification: October 22nd, 1973

Recall Notes:
MACK TRUCKS CAMPAIGN NO N/A.MANUF'D FEB.1971 THRU JUNE 1973.TRUCKS.POSSIBILITY THAT THE ELECTRIC HORN MOUNTING BRACKET COULD CRACK AND FAIL.IFTHIS CONDITION EXISTS THE HORN COULD INTERFERE WITH STEERING SHAFT UNIVERSALJOINT AND CAUSE STEERING LOCKUP IN A LEFT HAND TURN SITUATION.(CORRECT BYINSPECTING AND REPLACING HORN ASSEMBLY WITH IMPROVED TYPE BRACKET).

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NHTSA Campaign Number: 72V259000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: April 1st, 1966
Manufactured End Date: September 1st, 1972
Date of Owner Notification: January 19th, 1973

Recall Notes:
MACK TRUCK CAMPAIGN NO SCO37.TRUCKS EQUIPPED W/RADL 5281 OR R170 REAR AXLE.POSSIBILITY THAT REAR SPRING CLAMP PLATE MAY DEVELOP CRACKS WHICH COULD LEAD TOCLAMP FAILURE.IF CLAMP FAILS IT WOULD PERMIT THE AXLE TO SHIFT ON SPRING ANDCOULD INTERFERE WITH VEHICLE CONTROL.(CORRECT BY INSPECTING AND REPLACINGSPRING CLAMP PLATES WITH IMPROVED TYPES.)