Komatsu Galeo HD325-6, Operation & Maintenance Manual

Page: 208 / 317

.
MAINTENANCE
SERVICE PROCEDURE
MAINTENANCE
SERVICE PROCEDURE
3. Open drain valve (3) under the radiator, drain plug (4) at the
side face of the engine, and drain plug (5) under the vibration
damper, and drain the coolant.
4. After draining the coolant, close drain valve (3) and drain plugs
(4) and (5), and fill with city 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 valve (3) and drain plug (4) and (5),
and drain the water. After draining the water, close them.
7. After draining the water, clean the cooling system with cleaning
agent.
For the cleaning method, see the instructions for the cleaning
agent.
8. After the cleaning, open drain valve (3) and drain plug (4) and
(5), and drain all of the water.
9. Close drain valve (3) and drain plug (4) and (5).
10. 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 4-64)".
11. 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.
12. To remove the air contained in the coolant, run the engine at
low idle for 5 minutes, then run for another 5 minutes at high
idle. (When doing this, leave the coolant filler cap OFF.)
13. Stop the engine. About 3 minutes later, supply the coolant up
to the coolant filler, then close radiator cap.
14. Drain the coolant from inside of subtank (6), flush the inside of
the subtank, then fill with the coolant to a point between the
FULL and LOW marks.
4 - 27