1988 Mack U Series Recalls

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NHTSA Campaign Number: 89V086000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: August 1st, 1987
Manufactured End Date: April 1st, 1989
Date of Owner Notification: August 9th, 1989

Defect Summary:
STEERING WHEEL RETAINING NUTS MAY HAVE BEEN IMPROPERLY INSTALLED AND/OR TORQUED.

Corrective Summary:
RENEW AND RETORQUE STEERING WHEEL RETAINING NUTS.

Recall Notes:
SYSTEM: STEERING WHEEL RETAINING NUTS.VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS. CONSEQUENCE OF DEFECT: THIS COULD CAUSE STEERING WHEEL DISENGAGEMENT FROM THE STEERING COLUMN WITH LOSS OF STEERING CONTROL WHICH COULD RESULT IN ANACCIDENT.

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NHTSA Campaign Number: 89V032000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: March 1st, 1987
Manufactured End Date: September 1st, 1988
Date of Owner Notification: October 27th, 1989

Defect Summary:
AN INCORRECT HIGH PRESSURE POWER STEERING HOSE MAY HAVE BEEN INSTALLED.

Consequence Summary:
UNDER CERTAIN CONDITIONS, HOSE COULD FAIL RESULTING INLOSS OF POWER STEERING ASSIST AND POSSIBLY AN ACCIDENT.

Corrective Summary:
REPLACE INCORRECT POWER STEERING HOSES.

Recall Notes:
SYSTEM: POWER STEERING HOSE.VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS EQUIPPED WITH STRATOFLEX HIGH PRESSUREPOWER STEERING HOSE.

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NHTSA Campaign Number: 88V125000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: August 1st, 1987
Manufactured End Date: April 1st, 1988
Date of Owner Notification: July 20th, 1988

Defect Summary:
SOME OF THE NUTS/BOLTS USED TO FASTEN THE STEERING PITMAN ARM MAY LOOSEN.

Consequence Summary:
THIS WOULD ALLOW THE PITMAN ARM TO COME OFF THE STEERINGGEAR SECTOR SHAFT AND RESULT IN IMMEDIATE LOSS OF STEERING CONTROL AND A VEHICLECRASH COULD OCCUR.

Corrective Summary:
RETORQUE NUTS/BOLTS WHERE NECESSARY.

Recall Notes:
SYSTEM: STEERING PITMAN ARM.VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS.

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NHTSA Campaign Number: 88V085000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: November 1st, 1987
Manufactured End Date: November 1st, 1987
Date of Owner Notification: May 5th, 1988

Defect Summary:
CLAMP PLATES USED BETWEEN THE DRIVE SHAFT AND CARRIER YOKES MAY CRACK AND COULD BREAK DUE TO IMPROPER HEAT TREATMENT.

Consequence Summary:
IF CLAMP PLATE BREAKS, YOKE WOULD FLY OFF AT DETACHEDPOINT AND COULD INJURY ANYONE STRUCK BY FLYING FRAGMENTS. ALSO, THE DETACHEDINNER SHAFT COULD INTERFERE WITH THE BRAKE SYSTEM AIR SUPPLY HOSES AND TRACTORTIRES, WHICH COULD RESULT IN LOSS OF TRUCK CONTROL AND AN ACCIDENT.

Corrective Summary:
INSTALL NEW CLAMPING PLATES AND CAPSCREWS IN ALL LOCATIONS AS NEEDED.

Recall Notes:
SYSTEM: DRIVE SHAFT YOKE CLAMP PLATES.VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS.