7 Maintenance and care
80 TW85
7.9.3 Cooling system - combined hydraulic
oil/water/charge air cooler
Coolant level
Only open the radiator cap when the
engine is cold. There is danger of
scalding when checking hot coolant!
• Remove the cooler cap (59/1) and top up the
coolant. Read coolant level on viewing glass
(59/2). When the engine has cooled down, the
surge tank should be half full.
Refill with a 50%-50% mixture of water
and antifreeze.
Checking antifreeze
Before the beginning of the cold season, check the
level of antifreeze.
• At the factory, the antifreeze protection is set to
approx. -25°C. If temperatures are lower, the
level of antifreeze must be increased
accordingly.
Cleaning cooling fins
Dirt accumulation in coolers causes the
engine and/or the hydraulic oil to
overheat.
• The combined cooler is cleaned from the outlet
side (60) with compressed air.
• If necessary, e.g. in case of an oiled cooler,
clean with cold cleaner or a steam jet device.
• After cleaning, the engine must be brought to
operating temperature in order to dry the cooler.
HR32-044
1
2
Fig. 59 Coolant
HR32-045
Fig. 60 Cooler
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