1979 Mack Cf Recalls

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NHTSA Campaign Number: 91V070000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: December 1st, 1967
Manufactured End Date: December 1st, 1990
Date of Owner Notification: June 23rd, 1992

Defect Summary:
STRESSES IMPOSED ON THE LEVER DURING TURNING MANEUVERS AND/OR IMPACT INCIDENTS, SUCH AS WOULD BE CAUSED BY CURBS OR ROAD SURFACE IRREGULARITY, REDUCE THE LIFE EXPECTANCY OF THE PART. THE STEERING LEVER MAY CRACK AND EVENTUALLY THE STRESSES COULD CAUSE THE STEERING LEVER TO BREAK.

Consequence Summary:
A BROKEN STEERING LEVER WILL CAUSE LOSS OF STEERINGCONTROL WITHOUT PRIOR WARNING WHICH MAY RESULT IN A VEHICLE CRASH.

Corrective Summary:
REPLACE THE DEFECTIVE STEERING ARMS.

Recall Notes:
SYSTEM: STEERING LEVERS.VEHICLE DESCRIPTION: CF MODEL FIRE CHASSIS WITH GROSS AXLE WEIGHT RATINGS OF12,000 POUNDS OR GREATER AND EQUIPPED WITH POWER STEERING.NOTE: THE SPECIFIC MACK AXLES AFFECTED ARE: FA532, FAF532, FAFW537, FAFW5372,FAFW13.5, FAW538, FAW14.3, FA604, FA6042, FAW616, FAW618, FAW617, AND FAW20.

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NHTSA Campaign Number: 85V157000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: June 1st, 1973
Manufactured End Date: October 1st, 1985
Date of Owner Notification: August 27th, 1986

Defect Summary:
THE SPLINED STEERING SHAFT MAY NOT BE SUFFICIENTLY ENGAGED AS DESIGNED DUE TO INACCURATE DRILLING OF THE HOLES IN THE FRAME TO WHICH THE CAB FRONT MOUNT MEMBER IS BOLTED. UNDER CERTAIN CONDITIONS THE STEERING SHAFT MAY DISENGAGE. CONSEQUENCE OF DEFECT: A JARRING IMPACT MIGHT CAUSE DISENGAMENT OF THE SPLINED SHAFT RESULTING IN LOSS OF STEERING CONTROL AND POSSIBLY AN ACCIDENT.

Corrective Summary:
REPLACE SHAFTS WHICH MEASURE UNDER THE MINIMUM ENGAGEMENT DIMENSIONS WITH LONGER SHAFT.

Recall Notes:
SYSTEM: STEERING SHAFT. VEHICLE DESCRIPTION: FIRE TRUCKS.

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NHTSA Campaign Number: 84V036000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: October 1st, 1978
Manufactured End Date: May 1st, 1982

Defect Summary:
SPRING SEAT CAN DEFORM, WHICH CAUSES A DECREASE IN THE CLAMPING FORCE IN THE SUSPENSION ASSEMBLY. LOSS OF CLAMPING FORCE MAY BRING ABOUT AXLE MISALIGNMENT OR AXLE HOUSING FAILURE.

Corrective Summary:
THE AXLE HOUSING WILL BE INSPECTED AND REPLACED, IF NECESSARY. THE SPRING SEATS WILL ALSO BE REPLACED.

Recall Notes:
VEHICLE DESCRIPTION: HEAVY TRUCKS.SYSTEM: SUSPENSION; REAR SPRING SEAT.CONSEQUENCES OF DEFECT: LOSS OF VEHICLE CONTROL COULD OCCUR WITHOUT WARNING,POSSIBLY RESULTING IN AN ACCIDENT.

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NHTSA Campaign Number: 83V037000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: September 1st, 1976
Manufactured End Date: September 1st, 1981
Date of Owner Notification: August 5th, 1982

Defect Summary:
ON THE INVOLVED VEHICLES THE FLOORBOARD OPENING AND THE STEERING COLUMN SEAL BRACKET DO NOT HAVE SUFFICIENT CLEARANCE TO ALLOW THE SHAFT TO TURN FREELY. THIS CAUSES THE PINCH BOLT TO BIND OR LOCK AGAINST THE SEAL BRACKET.

Corrective Summary:
THE HOLE IN THE FLOORBOARD WILL BE ENLARGED TO ALLOW SUFFICIENT CLEARANCE OF THE STEERING COLUMN U-JOINT PINCH BOLT, AND A NEW BRACKET AND LAMP WILL BE INSTALLED AT NO CHARGE TO OWNER.

Recall Notes:
VEHICLE DESCRIPTION: FIRE FIGHTING EQUIPMENT CHASSIS EQUIPPED WITH SGP48STEERING GEARS.SYSTEM: STEERING; STEERING COLUMN SHAFT U-JOINT CLEARANCES.CONSEQUENCES OF DEFECT: THERE WILL BE LITTLE OR NO WHEEL RETURN; LOSS OFSTEERING CONTROL WITHOUT PRIOR WARNING COULD RESULT IN AN ACCIDENT.

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NHTSA Campaign Number: 81V154000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: September 1st, 1976
Manufactured End Date: September 1st, 1981
Date of Owner Notification: August 5th, 1982

Defect Summary:
THE FLOORBOARD OPENING AND THE STEERING COLUMN SEAL BRACKET MAY NOT ALLOW SUFFICIENT CLEARANCE FOR THE SHAFT TO TURN FREELY IN THE CENTER OF THE BRACKET/SEAL. THE PINCH BOLT IN THE COLUMN YOKE MAY BIND OR LOCK THE COLUMN AGAINST THE BRACKET, ALLOWING LITTLE OR NO WHEEL RETURN.

Corrective Summary:
DEALER WILL ENLARGE THE HOLE IN THE FLOORBOARD TO PROVIDE CLEARANCE FOR THE STEERING COLUMN U-JOINT PINCH BOLT. A NEW BRACKET AND CLAMP WILL ALSO BE INSTALLED WITHOUT CHARGE TO OWNER.

Recall Notes:
VEHICLE DESCRIPTION: TRUCK FIRE CHASSIS EQUIPPED WITH SGP48 STEERING GEAR.SYSTEM: STEERING; U-JOINT, FLOORBOARD.CONSEQUENCES OF DEFECT: IF THE STEERING ASSEMBLY LOCKS IN PLACE, LOSS OFVEHICLE CONTROL, WITHOUT WARNING, AND AN ACCIDENT COULD RESULT.