General Information; Trouble Diagnosis - TGB BLADE 250 Service Manual

12. COOLING SYSTEM

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.
● Refill the radiator with distilled water or specified additives.
● Add coolant to the reservoir.
● The cooling system can be serviced on the ATV.
● Never spill the coolant to the painted surface.
● Test the cooling system for any leakage after the repair.
● Please refer to Section 17 for inspection of the temperature sensor switch for the fan motor and the
water thermometer.
Technical Specification
Item
Pressure to open filler cap
Capacity of coolant: Engine + radiator
Reservoir upper
Thermostat
Thermos switch (fan)
Boiling point
Torque Value
For water pump impeller
Tools Requirement
Special tools
Water pump bearing driver (6901):
Water pump oil seal driver (Inner):
Water pump mechanical seal driver:
Inner bearing puller:
TGB-440645

Trouble Diagnosis

The engine temperature is too high
● The water thermometer and the temperature
sensor do not work properly.
● The thermostat is stuck to close.
● Insufficient coolant.
● The water hose and jacket are clogged.
● Fan motor malfunction.
● The filler cap of the radiator malfunction.
To this chapter contents
1.0~1.4kgf-m
TGB-440640
TGB-440641
TGB-440642
The engine temperature is too low
● The water thermometer and the temperature
● The thermostat is stuck to open.
Coolant is leaking
● The water pump mechanical seal does not
● The O ring is deteriorated.
● The water hose is broken or aged.
Specification
0.9±0.15 kgf/cm
850c.c.
420c.c.
Begins to activate at 82~95℃
Stroke: 0.05~3m
Begins to activate at 98±3℃
Not-pressure: 107.7℃
Pressurized: 125.6
sensor malfunction.
function properly.
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