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Maintenance and Adjustment
107
Coolant Level Adjustment
Warning
Do not remove the expansion tank or
radiator pressure cap when the engine
is hot.
When the engine is hot, the coolant
inside the radiator will be hot and also
under pressure.
Contact with this hot, pressurised
coolant will cause scalds and skin
damage.
Caution
If hard water is used in the
cooling system, it will cause scale
accumulation in the engine and
radiator and considerably reduce the
efficiency of the cooling system.
Reduced cooling system efficiency
may cause the engine to overheat and
suffer severe damage.
Note
If the coolant level is being checked
because the coolant has overheated,
also check the level in the radiator and
top up if necessary.
In an emergency, distilled water can be
added to the cooling system. However,
the coolant must then be drained and
replenished with HD4X Hybrid OAT
coolant as soon as possible.
Bonneville T100 (all models),
Bonneville T120 (all models),
Street Scrambler and Street Twin
To adjust the coolant level:
• Allow the engine to cool.
• The expansion tank cap can be
removed from the left hand side of
the motorcycle, towards the rear of
the engine.
• Remove the cap from the expansion
tank and add coolant mixture
through the filler opening until the
level reaches the MAX mark. Refit
the cap.
Speed Twin and Thruxton RS
To adjust the coolant level:
• The expansion tank cap can be
removed from the right hand side of
the motorcycle, towards the rear of
the engine.
• Remove the sprocket cover.
• Remove the cap from the expansion
tank and add coolant mixture
through the filler opening until the
level reaches the maximum (top)
mark.
• Refit the cap. Refit the sprocket
cover to 9 Nm.
Coolant Change
It is recommended that the coolant
is changed by an authorised Triumph
dealer in accordance with scheduled
maintenance requirements.
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