System Test - TGB BLADE 250 Service Manual

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System Test

Test on the filler cap
Hermetically seal the filler cap, apply water and
pressure to the filler cap. Replace it with new one if
found failing to maintain the specified pressure
within a given time limit, or the opening pressure is
too high or too low. The specified pressure shall
be maintained at least for 6 seconds in the test
Relief pressure for the filler cap: 0.9-0.15
2
kgf/cm
Apply pressure to the radiator, engine and water
hose to check for any leakage
Caution
Pressure which is too high may damage the
radiator. Never use pressure which exceeds
2
1.05 kg/cm
.
If the system fails to maintain the specified
pressure for at least 6 seconds, repair or replace
parts.
Change of coolant
Warning
Never attempt to carry out service work on the
cooling system unless the engine is completely
cooled down, otherwise, you may get scalded.
Remove the front center cover, and then remove
filler cap.
Place a water pan under the water pump; loosen
the drain bolt to drain out the coolant.
Reinstall the drain bolt.
Refilling system with coolant and bleeding the air
bubbles.
● Run the engine, and remove by-pass pipe.
● Check by-pass hole whether has the air bubble to
emit.
● If emits without the air bubble, only has the
coolant to flow out, then backflow pipe joint on,
engine flameout.
● Remove radiator filler cap.
● Starts the engine, inspects does not have the air
bubble in the radiator coolant, also the coolant
liquid level is stable.
● Stop the engine. Add coolant to proper level if
necessary.
● Screw and tighten up the radiator filler cap.
Caution
In order to avoid the water tank rusting, please do
not use the unclear trade mark refrigerant.
Coolant recommended: TGB Bramax radiator
agent.
Concentration: 50%
To this chapter contents
Drain bolt
By-pass pipe
12. COOLING SYSTEM
Pressure tester
Filler cap
12-5

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