Cooling Fan - Description

DESCRIPTION

3.7L ENGINE










The radiator cooling fan used on the 3.7L engine is an electrical fan and is integral to the fan shroud (4).

4.7L ENGINE

The radiator cooling fan used on the 4.7L engine is a hybrid design. The hybrid fan system consist of a low speed viscous driven mechanical fan and a electrical fan.

5.7L/6.1L ENGINE










The 5.7L/6.1L hydraulic cooling fan is integral to the fan shroud and is located between the radiator (1) and the engine.

The power steering pump supplies the hydraulic fluid and pressure to rotate the cooling fan blade, while the electrical part of the fan is controlled by the FCM.

The hydraulic fan drive (motor) (7) consists of the three major following components:

- Steering flow control valve
- Fan control valve
- Two stage G-rotor hydraulic drive

The hydraulic fan and drive is not serviceable. Therefore any failure of the fan blade, hydraulic fan drive or fan shroud requires replacement of the fan module because the fan blade and hydraulic fan drive are matched and balanced as a system and servicing either separately would disrupt this balance.










For hydraulic fluid routing information refer to flow chart.

CAUTION: Do not attempt to service the hydraulic cooling fan or fan drive separately, they are serviced as an assembly. Failure to do so may cause severe damage to the hydraulic cooling fan assembly.