Komatsu PC2000-8 BACKHOE, Operation & Maintenance Manual

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MAINTENANCE
MAINTENANCE PROCEDURE
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5. Set a container under drain valve (7) under the machine to
catch the coolant and water mix.
6. Install a drain hose (approx. 2 m) to drain valve (7).
7. Open drain valve (6).
8. Open drain valve (7) and drain the water.
9. After draining the water, close drain valves (6) and (7).
10. Remove cover (8) at the top of the power container, then
turn radiator cap (9) slowly to remove it.
11. Fill with city water through the water filler port of radiator
cap (9) until water overflows from the radiator.
12. Add city water to the reservoir tank through the water filler of reservoir tank cap (5) to fill up to the FULL line.
13. Close radiator cap (9). Leave reservoir tank cap (5) off.
14. Start the engine and run for approx. 10 minutes at low idling.
15. Stop the engine and open drain valves (6) and (7) to drain the water.
16. After draining the water, use a detergent to wash the tank. For details of the method of washing, see the
method of use provided with the detergent.
17. Close drain valves (6) and (7).
18. Remove drain plug (10) under reservoir tank (2) to drain all detergent liquid in reservoir tank (2).
19. Install drain plug (10).
20. Add coolant through the water filler up to the bottom of the filler port.
For details of the coolant density, see the COOLANT DENSITY TABLE.
21. Close radiator cap (9).
22. Add coolant to the reservoir tank (2) up to the H level.
23. To bleed the air from the coolant, run the engine at low idling for 5 minutes, then run for a further 5 minutes at
high idling. When doing this, leave cap (5) of the reservoir tank removed.
24. Close cap (5) of the reservoir tank.