Doosan DX60R Shop Manual page 270

Always be environmentally responsible.
Follow the guidelines of the EPA or other governmental
agencies for the proper disposal of hazardous materials
such as engine oil, diesel fuel and engine coolant. Consult
the local authorities or reclamation facility.
Never dispose of hazardous materials irresponsibly by
dumping them into a sewer, on the ground, or into ground
water or waterways.
Failure to follow these procedures may seriously harm the
environment.
Engine coolant contaminated with rust or scale reduces the
cooling effect. Even when extended life engine coolant is
properly mixed, the engine coolant gets contaminated as its
ingredients deteriorate. Drain, flush and refill the cooling system
with new coolant every 1000 hours or once a year, whichever
comes first.
1. Allow engine and coolant to cool.
2. Remove the radiator cap (1, Figure 113).
3. Remove the drain plug or open the drain cock (2, Figure
113) at the lower portion of the radiator and drain the
engine coolant.
4. Drain the coolant from the engine block.
• On models not equipped with an oil cooler, remove
the coolant drain plug (1, Figure 114) from the
engine block.
Engine
Page 90
CAUTION
Figure 112
Figure 113
Figure 114
FG009156
SP001693