173239 Fan Coupling
FEBI 173239 Fan Coupling with fan
| Category | Engine / Engine Cooling / Visco Clutch |
| Brand | Volvo Trucks |
| Cross-references | 20450239 | 85000177 | 20450239 | 85000177 |
An essential part of vehicle cooling is the fan coupling. Fan clutches without electrical control are still seen in older vehicles.
They are composed of two discs with liquid sandwiched between them (silicone oil). One disc is attached to the fan blades, and the other is powered by the engine. A bimetallic spring makes sure that, if cooling is necessary, the liquid between the discs is transported via adhesion to the opposite disc.
A fan coupling that is regulated electrically is the more recent variant. Although it has a similar construction, the engine control unit's fine regulation takes the place of the bimetallic spring's rough regulation. This helps the environment and saves fuel.A fan coupling that is regulated electrically is the more recent variant. Although it has a similar construction, the engine control unit's fine regulation takes the place of the bimetallic spring's rough regulation. This helps the environment and saves fuel.
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