Komatsu PW98MR-10 Operation & Maintenance Manual page 324

MAINTENANCE PROCEDURE
6.
Check that the coolant temperature is low enough to make
it possible to touch the radiator cap surface by bare hand,
turn radiator cap (7) slowly until it hits the stopper, and re-
lease the pressure.
7.
Then, while pushing radiator cap (7), turn it until it touches
the stopper, and remove it.
8.
Place containers to catch the coolant under the drain hose
installed to drain valve (8) and under coolant drain plug (9)
of the engine cylinder block.
9.
Open drain valve (8) at the bottom of the radiator.
10. Remove drain plug (9) of the cylinder block and drain the
coolant.
11. After draining the coolant, close drain valve (8).
12. Tighten drain plug (9) and add city water.
Add water until it fills the radiator.
13. Start the engine.
14. To complete the warm-up operation of the hydraulic equip-
ment more quickly, set the working mode to P mode
(heavy-duty mode).
For the details of the working mode setting procedure, see
"METHOD FOR SELECTING WORKING MODE (3-173)".
15. Move the lock lever slowly to FREE position (F).
16. Raise the bucket from the ground.
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WENAM00061
MAINTENANCE
RKA48170