1981 Mack Mack Recalls

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NHTSA Campaign Number: 90V010000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: January 1st, 1978
Manufactured End Date: December 1st, 1987
Date of Owner Notification: September 19th, 1990

Defect Summary:
THE 7/8 INCH SPRING EYE BOLTS WITHIN THE SPRING EYE BUSHING HANGER BRACKET OF THE REAR SUSPENSION MAY FAIL.

Consequence Summary:
THE SPRING COULD FALL ONTO THE ROAD SURFACE, WITHOUT WARNING TO THE DRIVER, AND A VEHICLE CRASH COULD OCCUR DUE TO THE SUDDEN DRAG OF THE SPRING.

Corrective Summary:
REPLACE ALL 7/8 INCH DIAMETER SPRING EYE BOLTS WITH 1 INCH DIAMETER BOLTS.

Recall Notes:
SYSTEM: SUSPENSION; SPRING EYE BOLT.VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS WITH ST34 OR ST 38 REAR SUSPENSION.

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NHTSA Campaign Number: 87V010000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: November 1st, 1971
Manufactured End Date: February 1st, 1987
Date of Owner Notification: February 9th, 1987

Defect Summary:
CROSSMEMBER CAN BE OVERSTRESSED AND CAN FAIL, ALLOWING THE BROKEN CROSSMEMBER TO PROTUDE ABOVE THE TOP OF THE FRAME AND INTERFERE WITH CHASSIS COMPONENTS.

Consequence Summary:
TRAILER HANDLING COULD BE AFFECTED DURING TURNINGMANEUVERS WHICH COULD RESULT IN LOSS OF TRUCK CONTROL AND A CRASH. ALSO, ACOMPLETELY SEPARATED CROSSMEMBER COULD AFFECT HEIGHT OF SUSPENSION AIR SPRINGSAND THE RESULTING LEAN COULD RESULT IN LOSS OF CONTROL.

Corrective Summary:
INSTALLATION OF A BOLTED DOUBLE PLATE TYPE CROSSMEMBER TO REPLACE THE STANDARD CHANNEL TYPE CROSSMEMBER.

Recall Notes:
SYSTEM: REAR CROSSMEMBER WITH NEWAY AIR SUSPENSION.VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS:DM,F,FM,MC,MCE,MH,MR,R,RD,RS,RL,RW,RWL,RWS AND U MODELS EQUIPPED WITH NEWAY AIRRIDE DRIVE AXLE SUSPENSION.

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NHTSA Campaign Number: 86V009000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: January 1st, 1978
Manufactured End Date: September 1st, 1985
Date of Owner Notification: February 13th, 1987

Defect Summary:
THE SPRING EYE BOLT WAS NOT TORQUED PROPERLY AND COULD FAIL DUE TO THE LOOSE FIT WITHIN THE SPRING EYE BUSHING/HANGER BRACKET. CONSEQUENCE OF DEFECT: THE SPRING COULD FALL ONTO THE ROAD SURFACE, WITHOUT WARNING TO THE DRIVER, AND A VEHICLE CRASH COULD OCCUR DUE TO THE SUDDEN DRAG OF THE SPRING.

Corrective Summary:
NOT AVAILABLE AT THIS TIME. IN THE INTERIM THE TORQUE OF THE SPRING EYE BOLT WILL BE CHECKED.

Recall Notes:
SYSTEM: SPRING EYE BOLT.VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS WITH ST34 OR ST38 SERIES REAR AXLE.