Doosan DX60R Shop Manual page 44

Burn Prevention
When checking the radiator coolant level, shut down engine, let
the engine and radiator cool down, then check the coolant
recovery tank. If the coolant level in the coolant recovery tank is
near the upper limit, there is enough coolant in the radiator.
Loosen the radiator cap gradually to release the internal
pressure before removing the radiator cap.
If the coolant level in the coolant recovery tank is below the
lower limit, add coolant.
Cooling system conditioner contains alkali. Alkali can cause
personal injury. Do not allow alkali to contact the skin, the eyes,
or the mouth.
Allow cooling system components to cool before you drain the
cooling system.
Hot oil and hot components can cause personal injury. Do not
allow hot oil or hot components to contact the skin.
Remove the hydraulic tank filter plug only after the engine has
been stopped. Make sure that the hydraulic tank filter plug is
cool before you remove it with your bare hand. Remove the
hydraulic tank filter plug slowly to relieve pressure.
Relieve all pressure in the hydraulic oil system, in the fuel
system, or in the cooling system before you disconnect any
lines, fittings, or related items.
HAAE1980
Batteries give off flammable fumes that can explode.
Figure 34
Do not smoke while you are checking the battery's electrolyte
levels.
Electrolyte is an acid. Electrolyte can cause personal injury. Do
not allow electrolyte to contact the skin or the eyes.
Always wear protective glasses when you work on batteries.
Track Excavator Safety SP001614
Page 36