Genuine Volvo 780 Cooling Fan Assembly

Volvo 780 Cooling Fan Assembly Parts and Q&A

• Fan Blade
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  Q: How to remove and install a Cooling Fan Assembly on a belt-driven type fan on Volvo 780?

  A:

  To remove and install the belt-driven type fan, first remove the negative battery cable then remove the top section of the tan shroud if applicable. Loosen the adjusting bolts to slacken the drive belts followed by remove the tan mounting bolts and fan assembly. For installation, the engine fan should be placed back, the tan mounting bolts should be tightened, the drive belt(s) should be adjusted to the specified tension, the top half of the fan shroud should be reinstalled if removed, and the negative battery cable should be reconnected. For models with electric cooling fans, the fan is operated by a thermocontact or thermal switch, usually kicking in when coolant temperatures reach between 190-212deg F. (88-100degC). B6304F engines have a fully electric radiator fan which is controlled by a relay reacting to temperature conditions or pressure switches in the A/C circuit, the relay being mounted in front of the battery. For models without 850/C70/S70/V70, disconnect both battery cables, remove the battery holder if required and disconnect the harness connector on the crossmember. Undo the relay and take off the ground lead and then the tan shroud if necessary, then the cooling fan mounting bolts to remove the fan assembly. For installation, put the fan assembly back, tighten the mounting bolts, reinstall the fan shroud, reconnect the ground lead and relay connector, attach the cross member connector, reinstall the battery holder, reconnect the battery cables, and start the engine and check the cooling fan operation. For 850/C70/S70/V70 models, remove the negative battery cable, remove the retaining bolts on the relay holder from the radiator, remove the control module and air intake hoses, and remove the four tan mounting bolts. Pull the fan up, unplug the relay and tan connectors and remove the tan from the vehicle. To install, put the fan back in the engine compartment, attach the relay and connectors, tighten the retaining bolts, reinstall the air hoses and secure the relay holder and reconnect the negative battery cable.