26Basic Settings and Service Procedures ICC 1 S DEngine – CoolingChecking / topping up engine coolantPrior to checking coolant level, allow engine tocool. The proportion of antifreeze in the enginecoolant must not exceed 50 percent.– Raise the debris container.– Check coolant level in expansion tank.– With engine cold, top up engine coolant to the"min" mark in expansion tank.Checking engine coolant level in expansion tankChecking cooling system for leaksThe radiator is a combination of two coolingcircuits, one for hydraulic fluid, the other for enginecoolant. The fan transports the cooling air fromthe outside into the engine compartment, passingit through the dual-circuit radiator. Check allradiator hoses, connections and the radiator itselffor leaks.Checking cooling fan functionsThe fan must start as soon as the ignition keyis turned to position "1".– Check electrical connections and fuses,and replace as required.– Measure voltage applied to electric motor.– If required, replace connecting cable / relay/ electric motor.When replacing the fan, it must be noted that thecable inlet connection on the electric motor pointsdownward.Checking cooling fan motor