Komatsu PC80MR-5E0 Operation & Maintenance Manual page 287

MAINTENANCE
17. Operate the work equipment control levers according to
the following procedure.
NOTICE
When the work equipment is operated, take care that it
does not interfere with the machine or ground.
1)
Move R.H. work equipment control lever slowly in the
direction of bucket CURL position (D). Operate the
lever to the end of its stroke and hold it in the position
for 30 seconds.
2)
Move R.H. work equipment control lever slowly in the
direction bucket DUMP position (C). Operate the lever to the end of its stroke and hold it in the position
for 30 seconds.
3)
Next, move L.H. work equipment control lever slowly in the direction arm IN position (B). Operate the
lever to the end of its stroke and hold it in the position for 30 seconds.
4)
Move L.H. work equipment control lever slowly in the direction arm OUT position (A). Operate the lever
to the end of its stroke and hold it in the position for 30 seconds.
Repeating the operations from step 1) to 4) moves the
graduation of the engine coolant temperature gauge
upward. The pointer of the engine coolant temperature
gauge moves down temporarily around the center of
gauge (A). Then, continue the operation for approxi-
mately 10 minutes.
18. Stop the engine.
19. Open drain plug (6).
20. Remove drain plug (7) and drain the coolant.
21. After draining the coolant, close drain plug (6).
22. Wind a sealing tape onto drain plug (7) and tighten the plug.
23. Install cover (3).
24. Add coolant through the water filler port up to the mouth of the port.
For details of the coolant density, see "coolant density table".
25. Run the engine at low idle for 5 minutes to remove the air from the coolant, then run at high idle for a further
5 minutes.
Keep radiator cap (5) removed during the above operations.
WENAM00241
MAINTENANCE PROCEDURE
RKA68740
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