Komatsu Galeo HD405-7R, Operation & Maintenance Manual

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MAINTENANCE
SERVICE PROCEDURE
MAINTENANCE
SERVICE PROCEDURE
3. Place containers to catch the coolant under drain valve (3) at
the bottom of the radiator and drain plug (4) at the side face of
the cylinder block.
Open drain valve (3) and drain plug (4), and drain the water.
4. After draining the water, close drain valve (3) and drain plug
(4), and fill with tap water.
5. When the radiator is full, start the engine, and run it at low idle.
Keep the engine running at low idle for 10 minutes until the
water temperature reaches more than 90
°
C (194
°
F).
6. Stop the engine, open drain valves (3) and drain plug (4), and
drain the water. After draining the water, close them.
7. Replace the corrosion resistor, then set valve (1) to the OPEN
position to open it.
For
replacing corrosion resistor, see "REPLACE
CORROSION RESISTOR CARTRIDGE (PAGE 4-69)".
8. Add coolant mixed with antifreeze until it overflows from the
water filler.
Decide the proportions of antifreeze and water according to the
table for the mixing rate of water and antifreeze.
9. To remove the air contained in the coolant, run the engine at
low idle for 5 minutes, then run for a another 5 minutes at high
idle. (When doing this, leave the water filler cap OFF.)
10. Stop the engine. About 3 minutes later, supply city water up to
the water filler, then close radiator cap.
11. Drain the cooling water from inside subtank (5), flush the inside
of the subtank, then fill with water to a point between the FULL
and LOW marks.
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