MAINTENANCE PROCEDURE MAINTENANCE Antifreeze is flammable, so keep it away from flame. Antifreeze is toxic. When removing the drain plug, be careful not to get water containing antifreeze on you. If it gets in your eyes, flush your eyes with large amount of fresh water and see a doctor at once. Use city water for the coolant. If river water, well water or other such water supply must be used, contact your Komatsu distributor. We recommend use of an antifreeze density gauge to control the mixing proportions. Prepare a container with a capacity of at least 13.4 liters to catch the drained coolant. 1. Remove undercover (1). 2. Turn radiator cap (2) slowly and remove it. 3.
Set a container to catch the drained coolant under drain valve (3) and drain plug (4). Remove drain hose (5) at the bottom of the radiator from clip (6), let it hang perpendicu- larly to the container, then open drain valve (3) and drain the coolant. Remove drain plug (4) from the cylinder block also to drain the coolant. 4. After draining the coolant, close drain valve (3) and drain plug (4), and fill with tap water. When the radiator is full of water, start the engine, run at low idling, raise the water temperature to above 90 °C, and run for approx. 10 min- utes. 5. Stop the engine, open drain valve (3) and drain plug (4), and drain the coolant. 6.
After draining the water, clean the radiator with detergent. For the cleaning method, follow the instruction of deter- gent. 7. Close drain valve (3), then wind sealing tape around drain plug (4) and close it. 8. After securing drain hose (5) with clip (6), install under- cover (1). 9. Add water through the water filler up to the filler port. 4-26 WARNING