MAINTENANCE The radiator cap seals the coolant filler opening of the radiator. Positive sealing requires a cap gasket and its contacting surfaces to be in good condition and a properly tightened cap. The radiator cap incorporates a pressure relief valve. The pressure relief valve keeps the pressure of the coolant at approximately 34 to 64 kPa or 0.35 to 0.65 kg/cmІ (5 to 9 psi). NOTE: Operating the machine without a radiator cap, or with a cap without a relief valve set to operate at the correct pressure, can cause damage. RADIATOR CAP REMOVAL WARNING Hot, scalding coolant can spray out if the radiator cap is removed suddenly.
Relieve system pressure by slowly turning the cap to the first notch or lifting the safety lever (if equipped). Use extreme caution when adding coolant to a hot radiator to avoid being burned. Wear gloves and goggles and keep face away from the filler neck. To remove the cap, turn the cap to the left, or counterclockwise up to the safety stop until all pressure is released. Press down on the cap and continue to turn until the cap is free to be removed. RADIATOR CAP INSTALLATION When installing the cap, the gasket and contacting surfaces must be clean. Turn the cap to the right, or clockwise until snug. DRAINING THE COOLING SYSTEM NOTE: Park the machine on level ground 1.
Run the engine until it reaches operating temperature; then turn the engine OFF. NOTE: Check for damaged hoses and loose or damaged hose clamps. Replace and fix where needed. Check the radiator for leaks, damage and accumulation of dirt. Clean and repair 2. Remove the radiator cap as outlined in this section. 3-66 WA320-3MC