1993 Mack Ch Recalls

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NHTSA Campaign Number: 00V019003
Manufacturer: Mack Trucks, Inc.
Manufacturer Campaign Number: SCO259
Date of Owner Notification: June 22nd, 2000

Defect Summary:
VEHICLE DESCRIPTION: HEAVY DUTY CLASS 8 TRUCKS EQUIPPED WITH FONTAINE FIFTH WHEEL ASSEMBLIES. THE FIFTH WHEEL MOUNTING PLATES CAN CRACK.

Consequence Summary:
UNDER THE TRAILER LOADING, THE MOUNTING PLATE COULD EVENTUALLY FAIL DUE TO FATIGUE.

Corrective Summary:
DEALERS WILL INSPECT AND REPLACE THE MOUNTING PLATES THAT ARE CRACKED.

Recall Notes:
MACK RECALL NO. SCO259.OWNER NOTIFICATION BEGAN JUNE 22, 2000.OWNER NOTIFICATION IS EXPECTED TO BEGIN OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT MACK AT 1-610-709-3011. ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S AUTO SAFETY HOTLINE AT 1-888-DASH-2-DOT (1-888-327-4236).

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NHTSA Campaign Number: 95E003010
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: October 1st, 1992
Manufactured End Date: March 1st, 1995

Defect Summary:
AIR SYSTEM BLOCKAGE IN THE AIR DRYER OCCURS DEGRADING THE MOISTURE REMOVING CAPABILITIES OF THE DRYER WHEN THE VEHICLE IS OPERATED IN A COLD ENVIRONMENT AND MOISTURE ACCUMULATES AND FREEZES IN THE AIR DRYER OR IN THE LINE BETWEEN THE DRYER AND THE AIR SYSTEM RESERVOIR. THE AIR DRYER CAN BECOME OVERPRESSURIZED CAUSING THE AIR DRYER CARTRIDGE TO SEPARATE FROM THE MOUNTING BASE.

Consequence Summary:
IF THE AIR DRYER SEPARATES FROM THE BASE, THE CARTRIDGE CAN SEPARATE SUFFICIENTLY ENOUGH TO CAUSE PERSONAL INJURY OR PROPERTY DAMAGE.

Corrective Summary:
DEALERS WILL EQUIP AIR SYSTEMS WITH A PRESSURE RELIEF VALVE TO BE LOCATED BETWEEN THE COMPRESSOR AND THE AIR DRYER. THIS PRESSURE RELIEF VALVE IS INTENDED TO VENT IF EXCESSIVE PRESSURE DEVELOPS IN THE AIR DRYER.

Recall Notes:
SYSTEM: BRAKES; AIR DRYER. VEHICLE DESCRIPTION: HEAVY DUTY CLASS 8 TRUCKS EQUIPPED WITH ROCKWELL WABCO SYSTEM SAVER "1000" OR SYSTEM SAVER "TWIN" AIR DRYER. NOTE: IF YOUR VEHICLE IS PRESENTED TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND THE REMEDY IS NOT PROVIDED FREE OF CHARGE WITHIN A REASONABLE TIME, CONTACT MACK AT 1-610-709-3011.ALSO CONTACT THE NATIONAL HIGHWAYTRAFFIC SAFETY ADMINISTRATION'S AUTO SAFETY HOTLINE AT 1-800-424-9393.

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NHTSA Campaign Number: 94V216000
Manufacturer: Mack Trucks, Inc.
Manufactured Begin Date: July 1st, 1988
Manufactured End Date: March 1st, 1993
Date of Owner Notification: April 3rd, 1995

Defect Summary:
THE DRIVESHAFT CENTER BEARING SUPPORT BRACKET CAN CRACK AND BREAK.

Consequence Summary:
IF THIS HAPPENS, THE DRIVESHAFT WILL WOBBLE AND CAN SEPARATE. SEPARATION CAN RESULT IN DAMAGE TO OTHER COMPONENTS OF THE VEHICLE OR LOOSE FRAGMENTS CAN FALL ONTO THE ROADWAY PRESENTING A HAZARD TO OTHER DRIVERS.

Corrective Summary:
DEALERS WILL REPLACE THE CENTER BEARING HANGER BRACKET.

Recall Notes:
SYSTEM: POWERTRAIN; DRIVELINE; BRACKET; SUPPORT; CENTER SHAFT.VEHICLE DESCRIPTION: CLASS 8 HEAVY TRUCKS.NOTE: IF THE VEHICLE IS PRESENTED TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND THE REMEDY IS NOT PROVIDED FREE OF CHARGE WITHIN A REASONABLE TIME OR THE REMEDY DOES NOT CORRECT THE DEFECT, CONTACT MACK TRUCKS AT 1-610-439-3011. ALSO, CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINSTRATION'S AUTO SAFETY HOTLINE AT 1-800-424-9393.

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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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NHTSA Campaign Number: 93V024000
Manufacturer: Mack Trucks, Inc.
Date of Owner Notification: March 24th, 1993

Defect Summary:
THE CARRIER YOKE BOLTS WERE MANUFACTURED WITH WORN ROLLING THREAD DIES, CAUSING STRESS CONCENTRATIONS WHICH CAUSED CRACKS DURING THE QUENCHING PROCESS.

Consequence Summary:
THIS CONDITION CAN CAUSE BOLT FAILURE AND ALLOW THEDRIVELINE TO SEPARATE FROM THE CARRIER ASSEMBLY.

Corrective Summary:
REPLACE THE CARRIER YOKE BOLTS.

Recall Notes:
SYSTEM: TRAILER YOKE.VEHICLE DESCRIPTION: HEAVY TRUCKS.