Doosan DX700LC Operation And Maintenance Manual page 241

Change Radiator Coolant
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.
Do not mix ethylene glycol and propylene glycol when
changing the antifreeze solution. Flushing should be
performed to minimize volume of mixing between the two
columns. Mixing the two compounds may cause generation
of foreign material to damage the system.
Do not mix antifreeze
manufactures. Mixed solution may degrade the capabilities
of the system. It is recommended to use the standard
product from Doosan.
In the bitterly cold area or weather, the customer should
frequently check the performance of the coolant for
appropriateness for the weather, and then determine
change cycle of the coolant.
1. Slowly open radiator cap to allow any pressure to escape.
2. Remove access covers under radiator and engine oil pan.
3. Place a container under drain plugs (1, Figure 96) and
drain valve (2, Figure 97). Remove drain plugs (1, Figure
96) and EGR plugs (3 and 4, Figure 98) and open drain
valve (2, Figure 97) to drain coolant.
4. Drain coolant from heater hoses by removing clamps (5
and 6, Figure 99) and hoses.
NOTE:
Make sure heater hose shutoff valves are
"OPENED".
Inspection, Maintenance and Adjustment
WARNING
CAUTION
solutions from
Figure 95
different
Figure 96
ARO1760L
1
1
FG016120
OP001123
4-53