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.