Komatsu PW130ES-6K Operation & Maintenance Manual page 194

MAINTENANCE.
4. Fill the system with clean water, refer to "FILLING THE SYS-
TEM" on page 193 and add a flushing compound that is com-
patible with aluminium. Flush the system in accordance with
the instructions furnished with the compound.
5. After flushing, rinsing and completely draining the system.
Refill with clean coolant. Refer to"FILLING THE SYSTEM" on
page 193.
FILLING THE SYSTEM
REMARK
Be sure to fill the heater and heater supply lines with fresh
coolant, even if the heater is not in use (warm weather). Leaving
the heater core empty causes corrosion in the heater.
1. Be sure the radiator drain valve and crankcase drain plugs
are closed and tightened.
2. Fill the cooling system to maximum capacity. Fill with anti-
freeze.
3. Open the after-cooler air drain valve (4) and add coolant until
it overflows from the water filler. When the coolant comes up
to near the water filler port, close the air drain valve.For cool-
ant specifications, see COOLANT SYSTEM".
4. Start engine and run until normal operating temperature is
reached. Add coolant when needed to keep proper level in
reserve tank.
5. After all air is removed and level remains fixed, install the
radiator cap.
6. Fill the radiator reserve tank with coolant until level is
between the FULL and LOW markings on the tank.
REFILLING AN OVERHEATED SYSTEM
Do not add coolant to the radiator of an overheated engine unless
absolutely necessary. However, if necessary:
1. Remove the radiator cap. Refer to "RADIATOR CAP" in this
section.
2. Be sure all the drains are closed.
Use extreme caution when adding coolant to a hot radiator to
avoid being burned. Wear gloves and goggles and keep away
from the filler neck.
3. Add coolant to the radiator slowly until full.
4. Remove the reserve tank cap.
WARNING
SERVICE PROCEDURE
193