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MAINTENANCE
3)
Move the L.H. work equipment control lever slowly in the direction to the arm IN side (B). Operate the
lever to the end of its travel and hold it in 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.
When the operations of steps 1) to 4) are repeated, the
pointer of the engine coolant temperature gauge rises. The
pointer of the engine coolant temperature gauge moves
down temporarily around the center of scale (E). Then,
continue the operation for approximately 10 minutes.
15. Stop the engine and open drain valve (3) to drain the cool-
ant.
16. Open the door at the rear left of the machine, drain the
coolant from sub-tank (5), clean the inside of the sub-tank,
then fill with coolant up to the middle between FULL and
LOW marks.
NOTICE
If the sub-tank is extremely dirty and it is difficult to
clean, replace it with a new one.
17. After draining the coolant, clean it with coolant.
18. Close drain valve (3).
19. Install the undercover.
20. Fill with coolant through the coolant filler port up to the
mouth of the port.
For details of the coolant density, see "coolant density ta-
ble".
21. 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.
MAINTENANCE PROCEDURE
4-23
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