KTM 890 DUKE 2021, Owner'S Manual

Page: 103 / 143

COOLING SYSTEM 17
101
17.1 Cooling system
V01254-10
Water pump
1
in the engine ensures forced circulation of the
coolant.
The pressure resulting from the warming of the cooling system is
regulated by a valve in radiator cap
2
. Heat expansion causes
excess coolant to flow into compensating tank
3
. When the tem-
perature falls, this surplus coolant is sucked back into the cooling
system. This ensures that operating the vehicle at the specified
coolant temperature will not result in a risk of malfunctions.
115 °C (239 °F)
H02695-10
The coolant is cooled by the air stream and a radiator fan
4
,
which is activated at high temperature.
The lower the speed, the less the cooling effect. Dirty cooling fins
also reduce the cooling effect.
17.2 Checking the antifreeze and coolant level
Warning
Danger of scalding During motorcycle operation, the coolant gets very hot and is under pressure.
–
Do not open the radiator, the radiator hoses or other cooling system components if the engine or the
cooling system are at operating temperature.
–
Allow the cooling system and the engine to cool down before you open the radiator, the radiator hoses
or other components of the cooling system.
–
In the event of scalding, rinse the area affected immediately with lukewarm water.
Warning
Danger of poisoning Coolant is toxic and a health hazard.
–
Keep coolant out of the reach of children.
–
Do not allow coolant to come into contact with the skin, the eyes and clothing.
–
Consult a doctor immediately if coolant is swallowed.
–
Rinse the affected area immediately with plenty of water in the event of contact with the skin.
–
Rinse eyes thoroughly with water and consult a doctor immediately if coolant gets into the eyes.
–
Change clothing if coolant spills onto your clothing.
Condition
The engine is cold.
Preparatory work
–
Stand the motorcycle upright on a horizontal surface.