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4. Turn the radiator cap (5) slowly until it comes into contact with
the stopper to relieve internal pressure from the radiator.
5. With no pressure in the radiator, give further turning of the
radiator cap (5) until it reaches the stopper while holding it down.
Remove the radiator cap (5).
6. See “Operation 1.9 Engine Hood” and open the engine hood.
7. Remove the four mounting bolts (7) and remove the engine
hood bottom cover (6).
8. Place a drain pan under the drain valve (8) lying below the
radiator to receive coolant (antifreeze-mixed water).
9. Open the drain valve (8) to drain coolant.
Close the drain valve (8) upon completion of draining.
10. Supply tap water to the radiator through the radiator supply port.
The radiator needs to be filled up to the supply port.
11. Start the engine with the drain valve (8) open, and ensure the
engine runs at low idle. Conduct a 10-minute cleaning with
running water.
CAUTION
• The radiator is to retain a high water level during cleaning
with running water. Adjust the quantities of water supplied
and drained as necessary.
• Ensure that the water filling hose stays connected to the
radiator supply port properly during cleaning with running
water.
12. After cleaning, stop the engine and water supply and drain tap
water. Close the drain valve (8) upon completion of draining.
NOTES
Cleaning with the cleaning agent must conform to instructions
provided on the cleaning agent.
14. Open the drain valve (8) to drain the cleaning agent after
cleaning with the agent. Close the drain valve (8) upon
completion of draining.
15. Supply tap water to the radiator through the radiator supply port.
The radiator needs to be filled up to the supply port.
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