Komatsu PC138US-11 Operation & Maintenance Manual page 337

MAINTENANCE
16. 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 the R.H. work equipment control lever slowly in
the direction to the bucket CURL side (D). Operate the
lever to the end of its travel and hold it in position for
30 seconds.
2)
Move the R.H. work equipment control lever slowly in
the direction to the bucket DUMP side (C). Operate the lever to the end of its travel and hold it in posi-
tion 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 the L.H. work equipment control lever slowly in the direction to the arm OUT side (A). Operate
the lever to the end of its travel and hold it in position for 30 seconds.
Repeating the operations from step 1 to 4 moves the
pointer of the engine coolant temperature caution
lamp (4) upward. The pointer of the engine coolant
temperature caution lamp moves down temporarily
around the center of gauge (A). Then, continue the
operation for approximately 10 minutes.
17. Stop the engine.
18. Open the drain valve (6).
19. Remove the drain plug (7) and drain the coolant.
20. After draining the coolant, close the drain valve (6).
21. Wind a sealing tape onto drain plug (7) and tighten the plug.
22. Install the covers (1) and (4).
23. Add Non-Amine Engine Coolant through the coolant filler port up to the mouth of the port.
For the concentration of Non-Amine Engine Coolant, see "Coolant density table".
24. 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 the radiator cap (5) removed during the above operations.
WENAM00111
MAINTENANCE PROCEDURE
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