Komatsu Galeo PC27MR-2 Operation & Maintence Manual page 187

MAINTENANCE PROCEDURE MAINTENANCE PROCEDURE
4. Place a container to catch the coolant under the drain hose
installed to drain valve (2) and under coolant drain plug (3) on
the engine block.
5. Open drain valve (2) and drain the water.
Remove drain plug (3) from the engine cylinder block and drain
the water.
6. After draining the antifreeze solution, close drain valve (2) and
tighten drain plug (3), then fill with clean water. After the
radiator is filled with water, start and run the engine at low idle
speed. After the coolant temperature rises above 90°C (194°
F), run the engine for about 10 minutes.
7. Stop the engine, then open drain valve (2) and remove drain
plug (3) to drain the water.
8. Close drain valve (2). Wind seal tapes onto drain plug (3), then
tighten it.
9. Decide the proportions of antifreeze and water according to the table for the mixing rate of water and antifreeze.
10. To remove air in the cooling system, run the engine for 5 minutes at low idle, then for 5 minutes at high idle.
(While doing this, leave the radiator cap removed.)
11. Drain the coolant inside sub-tank (4), clean the inside of the sub-tank, then fill again with coolant to a point
midway between the FULL and LOW marks.
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PC27MR
MAINTENANCE MAINTENANCE