Komatsu D85EX-18 Operation & Maintenance Manual page 308

MAINTENANCE PROCEDURE
Density (%)
• Coolant is toxic. When opening the drain valve, be careful not to get coolant on you. If it gets in
your eyes, flush your eyes with large amount of fresh water and see a doctor immediately.
• When handling the cooling water containing coolant that has been drained during changing the
coolant or repair of radiator, contact your Komatsu distributor or request a qualified company to
perform the operation. Coolant is toxic, so never pour it into drainage ditches or drain it onto the
ground surface.
Non-Amine Engine Coolant (AF-NAC) is already diluted with distilled water, so it is not flammable. (For dilution
water, see "COOLANT AND WATER FOR DILUTION (4-6)".)
Check the density with a coolant tester.
Prepare a hose to use when filling with coolant and water.
Prepare a container whose capacity is larger than the specified coolant volume to catch drained coolant.
1.
Place the machine on a level place.
2.
Stop the engine.
3.
Turn radiator cap (1) slowly until it hits the stopper and re-
lease the pressure.
4.
While pushing radiator cap (1), turn it until it touches to the
stopper, then remove it.
5.
Put containers to catch the coolant under drain valve (2) at
the bottom of the radiator and under drain valve (3) at the
side of the cylinder block.
6.
Open drain valves (2) and (3) to drain the coolant.
7.
After draining the coolant, close drain valve (2) and drain
valve(3) and fill with city water.
8.
After the radiator is filled with water, start the engine.
9.
Run the engine at low idle for approximately 10 minutes.
10. Stop the engine.
11. Open drain valves (2) and (3) to drain the water.
12. Close drain valves (2) and (3).
13. Add Non-Amine Engine Coolant (AF-NAC) through the
coolant filler port up to the mouth of the port.
For the density of Non-Amine Engine Coolant (AF-NAC) ,
see "Coolant density table".
14. Start the engine.
15. Run the engine at low idle for 5 minutes, and then run at
full speed for a further 5 minutes. (At this time, keep the ra-
diator cap removed.)
The air is bled from the coolant.
16. Drain the coolant in reservoir tank (4).
17. Clean the inside of reservoir tank (4).
4-20
30 36 41
k k
WARNING
46 50 54
MAINTENANCE
58 61 64