13. COOLING SYSTEM
13-2
General Information
General
Warning:
While the engine is running, do not attempt to open the radiator cap, the pressurized hot coolant may
shoot out and cause serious injury. No maintenance work is allowed to perform until the engine is
completely cooled down.
y Refill the radiator with distilled water or specified additives.
y Add coolant to the reserve tank.
y The cooling system maintenance can be serviced on the ATV.
y Never spill the coolant to the painted surface.
y Test the cooling system for any leakage after the servicing.
y Please refer to Section 17 for inspection of the thermo switch for the fan motor and the coolant
temperature sensor.
Technical Specification
Item Specification
Pressure to open filler cap 0.9±0.15 kgf/cm
2
Capacity of coolant: Engine + radiator
Reserve tank upper
1750c.c.
350c.c.
Thermostat
Begins to activate at 82~95℃
Stroke: 0.05~3mm
Thermos switch (fan) Begins to activate at 98±3℃
Boiling point
Not-pressure: 107.7℃
Pressurized: 125.6℃
Torque Value
For water pump impeller 1.0~1.4kgf-m
Tools Requirement
Special tools
Water pump bearing driver (6901): SYM-9100100
Water pump oil seal driver (Inner): SYM-9120500-H9A
Water pump mechanical seal driver: SYM-1721700-H9A
Inner bearing puller: SYM-6204020
Trouble Diagnosis
The engine temperature is too high
y The water temperature sensor or the thermo
switch (fan) does not work properly.
y The thermostat is stuck to close.
y Insufficient coolant.
y The water hose and jacket are clogged.
y Fan motor malfunction.
y The radiator filler cap malfunction.
The engine temperature is too low
y The water temperature sensor or the thermo
switch malfunction.
y The thermostat is stuck to open.
Coolant is leaking
y The water pump mechanical seal does not
function properly.
y The O ring is deteriorated.
y The water hose is broken or aged.
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