KTM 690 DUKE AUS/UK 2009, Руководство пользователя, Страница: 117 / 176

MAINTENANCE WORK ON CHASSIS AND ENGINE
115
9.55
Cooling system
700180-01
The water pump

in the engine forces the coolant to flow.
The pressure resulting from the warming of the cooling system is regulated by a valve in
the radiator cap

. Heat expansion causes excess coolant to flow into the compensating
tank

. If the temperature falls, the excess coolant is sucked back into the cooling system.
The specified coolant temperature is therefore permissible without danger of function prob-
lems.
125 °C (257 °F)
100167-10
The coolant is cooled by the air stream and a radiator fan

, which is controlled by a ther-
moswitch.
The lower the speed, the less the cooling effect. Dirty cooling fins also reduce the cooling
effect.
9.56
Checking antifreeze and coolant level
Warning
Scalding hazard During motorcycle operation, the coolant gets very hot and is under pressure.
–
Do not open the radiator, the radiator hoses or other components of the cooling system when the engine is hot. Allow the engine
and radiator to cool down. If you are scalded, hold the affected part under cold water immediately.