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12. COOLING SYSTEM
12-2
General Information
General
Warning:
While the engine is running, never attempt to open the radiator filler cap, the pressurized hot coolant
may shoot out and cause serious scalding injury. No maintenance work is allowed to perform unless
the engine is completely cooled down.
y Refill the radiator with distilled water or specified additives.
y Add coolant to the reservoir.
y The cooling system 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 repair.
y Please refer to Section 17 for inspection of the temperature sensor switch for the fan motor and the
water thermometer.
Technical Specification
Item Specification
Pressure to open filler cap 0.9±0.15 kgf/cm
2
Capacity of coolant: Engine + radiator
Reservoir upper
850c.c.
420c.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 thermometer and the temperature
sensor do 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 filler cap of the radiator malfunction.
The engine temperature is too low
y The water thermometer and the temperature
sensor 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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