Komatsu PC290LC-6K Operation & Maintenance Manual page 181

Hydraulic excavator
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10. When the water is completely clean, stop the engine, close drain
valve
, wrap the drain plug with seal tape, then close drain plug
11. Install the undercover.
12. Add cooling water until it overflows from the water filler.
13. To remove the air in the cooling water, run for five minutes at low
idling, then for another five minutes at high idling. When doing this,
leave radiator cap
14. After draining off the cooling water of reserve tank
side of the reserve tank and refill the water between FULL and LOW
level.
15. Stop the engine, wait for about three minutes, add cooling water, up
to near the radiator water filler port, then tighten cap
off.
.
, clean the in-
.
24. SERVICE PROCEDURE
3-35

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