Doosan DX190W, Operation And Maintenance Manual

Page: 251 / 315

OP000530
4-55
Inspection, Maintenance and Adjustment
Change Radiator Coolant
1. Slowly open the radiator cap to allow any pressure to
escape.
2. Place a container under the radiator and open the drain
valve (2, Figure 101).
NOTE: Dispose of drained fluids according to local
regulations.
3. Open heater shutoff valves (3 and 4, Figure 101) to allow
coolant to drain from heater core.
4. Remove coolant drain plug (1, Figure 103) from engine.
5. Install drain plug, and close drain valve after coolant has
completely drained from system.
6. Fill cooling system with a flushing solution.
7. Run engine at low idle until the coolant temperature gauge
reaches the "BLUE ZONE." Run engine for another ten
minutes.
8. Allow engine to cool.
9. Drain flushing fluid and fill system with water.
10. Run engine again to allow water to completely circulate.
11. After allowing engine to cool, drain water and fill system
with proper antifreeze mixture for ambient temperature.
Refer to coolant concentration table. See “Antifreeze
Concentration Tables” on page 4-80.
12. Run engine without radiator cap installed, so that all air will
be purged from system. Fill radiator to fill neck.
13. Drain and fill radiator coolant recovery tank.
Figure 100
ARO1760L
WARNING!
Allow the engine to cool before releasing the radiator cap.
Make sure to loosen the cap slowly to release any
remaining pressure.
Radiator cleaning is performed while the engine is running.
Take extreme caution when working on or near a running
engine. Make sure to lock out and tag the controls notifying
personnel that service work is being performed.
Do not remove the radiator cap unless it is required.
Observe the coolant level in the coolant recovery tank.
2
FG001407
Figure 101
Figure 102
ARO1760L
FG006775
1
Figure 103