NHTSA Campaign 96V232000

ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN

Issued by FREIGHTLINER CORPORATION · Reported Nov 13, 1996 · 27,500 vehicles affected

What's wrong

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.

Vehicles affected by this recall

Make Model Year Units
FREIGHTLINER FLA 1993 27,500
FREIGHTLINER FLA 1994 27,500
FREIGHTLINER FLB 1993 27,500
FREIGHTLINER FLB 1994 27,500
FREIGHTLINER FLD 1993 27,500
FREIGHTLINER FLD 1994 27,500

Source: NHTSA Campaign 96V232000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.