Komatsu WA800-3E0, Operation & Maintenance Manual

Page: 250 / 336

SERVICE PROCEDURE
MAINTENANCE
4-26
1. Stop the machine in a horizontal place.
2. Stop the engine.
3. Open engine side cover (1).
4. Tighten valve (3) of corrosion resistor (2).
(Only when corrosion resistor is used)
5. Loosen radiator cap (4) slightly to release the pressure,
then remove the cap.
6. Prepare a container to catch the supercoolant mix.
7. Install hoses to the coolant drain port of radiator drain
plugs (5) and (6), then open drain plugs (5) and (6), and
drain the coolant.
REMARK
Use the supplied hose to prevent coolant from spraying out into
the surrounding area.
8. After draining the coolant, close drain plugs (5) and (6).
9. Add tap water through radiator water filler (4).
10. When the radiator is full, start the engine, and run it at low idle.
Keep the engine running at low idle for 10 minutes until the coolant temperature reaches more than 90°C.
11. Stop the engine.
12. Open drain plugs (5) and (6), and drain the water.
13. After draining the water, close drain plugs (5) and (6), and remove the hoses.