FREIGHTLINER FLA 1993: ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN

General Information

NHTSA Campaign ID Number: 96V232000

Make Model Year
FREIGHTLINER FLA 1993
Date Owners Notified Date Received by ODI Date Added to Database
1997-02-11 1996-11-13 1996-11-27

Production Dates: 1993-10-01 - 1994-06-30

Manufacturers Involved: FREIGHTLINER LLC

Component: ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN

Potential Number Of Units Affected: 27500

Report Initiator: MFR MFR Report

Summary

VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS EQUIPPED WITH HORTON FAN DRIVES. THE FAN DRIVE CONTROL SYSTEM WAS RECONFIGURED WHICH RESULTED IN A SIGNIFICANT INCREASE IN THE DEMAND FOR FAN ACTIVATION AND ASSOCIATED STRESS TO ELECTRICAL AND MECHANICAL COMPONENTS. VARIOUS COMPONENT FAILURE MODELS, COMBINED WITH CHARACTERISTICS OF THE FAN CLUTCH AND ITS BEARINGS, CAN CAUSE FAN CLUTCH BEARINGS TO FAIL PREMATURELY AND RESULT IN A LOCKED FAN.

Consequence

IF THE FAN IS LOCKED, THE THE SYSTEM CALLS FOR THE FAN TO BE ON, THE FAN CLUTCH WILL SLIP, GENERATE HEAT, AND UNLESS RELEASED, WILL RESULT IN A FIRE.

Remedy

DEALERS WILL REPLACE THE FAN CLUTCH DRIVE DISC WITH ONE THAT INCORPORATES A THERMALLY ACTIVATED PRESSURE RELIEF.

Notes

OWNER NOTIFICATION:OWNER NOTIFICATION WILL BE COMPLETED BY DECEMBER 9, 1996. NOTE: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 FREIGHTLINER AT 1-503-735-8000.ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S AUTO SAFETY HOTLINE AT 1-800-424-9393.