1991 Mack Fdm Recalls

All 1991 Mack Fdm recalls can be found below. It is important to us to provide a complete resource for recall information, so if you know of any additional related recalls, please contact us to let us know.

March 1st, 1994

NHTSA Campaign Number: 94V032000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: July 1st, 1987
Manufactured End Date: July 1st, 1992
Date of Owner Notification: May 27th, 1994

Defect Summary:
FUEL INJECTION SYSTEM RECONFIGURATION TO COMPLY WITH ENGINE EMISSION STANDARDS CAUSE HIGHER ENGINE VIBRATION LEVELS WHICH LEAD TO EARLY WEAR AND COMPLETE FAILURE OF THE SECONDARY THROTTLE RETURN MECHANISM.

Consequence Summary:
IN THE EVENT THE PRIMARY THROTTLE RETURN FAILS, FAILURE OF THE SECONDARY THROTTLE RETURN SYSTEM WOULD NOT PROVIDE PROTECTION AGAINST LOSS OF THROTTLE CONTROL.

Corrective Summary:
A NEW PRODUCTION SECONDARY THROTTLE RETURN SYSTEM CONFIGURATION WILL BE INSTALLED.

Recall Notes:
SYSTEM: FUEL; FUEL PUMP.VEHICLE DESCRIPTION: CLASS 8 TRUCKS EQUIPPED WITH E6 AND E7 ENGINES WITH ROBERT BOSCH P7100 MECHANICALLY-GOVERNED FUEL INJECTION PUMPS.NOTE: IF YOUR VEHICLE IS PRESENTED TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND THE REMEDY IS NOT PROVIDED WITHIN A REASONABLE TIME AND FREE OF CHARGE OR THE REMEDY DOES NOT CORRECT THE DEFECT OR NONCOMPLIANCE, PLEASE CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S AUTO SAFETY HOTLINE AT 1-800-424-9393.

November 16th, 1993

NHTSA Campaign Number: 93V176000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: August 1st, 1989
Manufactured End Date: December 1st, 1991
Date of Owner Notification: January 12th, 1994

Defect Summary:
THE DRIVESHAFT TO THE FRONT DRIVING AXLE IS SECURED TO A BRACKET USING TWO PILLOW BLOCKS. THESE BLOCKS ARE OF INSUFFICIENT STRENGTH TO SUPPORT THE DRIVESHAFT AND COULD FAIL.

Consequence Summary:
PILLOW BLOCK FAILURE ALLOWS THE DRIVELINE (JACKSHAFT)TO DROP DOWN ONTO THE ROADWAY AND CREATE A SAFETY HAZARD TO OTHER VEHICLES.

Corrective Summary:
MACK WILL INSTALL THICKER PILLOW BLOCKS AND SUPPORT U-BOLTS.

Recall Notes:
SYSTEM: POWERTRAIN; DRIVELINE; BRACKET; SUPPORT; CENTER SHAFT.VEHICLE DESCRIPTION: FRONT DISCHARGE MIXER MODEL MEDIUM-DUTY TRUCK CHASSIS.NOTE: IF YOUR VEHICLE IS PRESENTED TO AN AUTHORIZED DEALER ON AN AGREED UPONSERVICE DATE AND THE REMEDY IS NOT PROVIDED WITHIN A REASONABLE TIME AND FREEOF CHARGE OR THE REMEDY IS NOT PROVIDED WITHIN A REASONABLE TIME AND FREE OFCHARGE OR THE REMEDY DOES NOT CORRECT THE DEFECT OR NONCOMPLIANCE, PLEASECONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S AUTO SAFETY HOTLINEAT 1-800-424-9393.

September 1st, 1993

NHTSA Campaign Number: 93V137000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: April 1st, 1991
Manufactured End Date: May 1st, 1993
Date of Owner Notification: October 1st, 1993

Defect Summary:
THE ENGINE COOLING FAN BLADES MAY BREAK DUE TO INADEQUATE BLADE STRENGTH AROUND THE RIVETS THAT ATTACH THE BLADES TO THE FAN SPIDER.

Consequence Summary:
IF COMPLETE FRACTURE OF THE FAN BLADE OCCURS, IT COULDBE PROPELLED OUTSIDE THE FAN SHROUD, INJURING PERSON(S) IN THE VICINITY OFTHE TRUCK.

Corrective Summary:
AN IMPROVED FAN WILL BE INSTALLED ON THESE VEHICLES.

Recall Notes:
SYSTEM: ENGINE; COOLING FAN.VEHICLE DESCRIPTION: CLASS 8 HEAVY TRUCKS EQUIPPED WITH 6 BLADED FANSMANUFACTURED BY ENGINEERED COOLING SYSTEMS, INC.

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