For the system venting during the circuit filling step, there is a special union at the top of the head (see
filling rules).
To ensure cooling in case of poor dynamic ventilation, there is an electric fan controlled by the injection
system.
TECHNICAL SPECIFICATIONS
Specification Desc./Quantity
Cooling system capacity 1.8 l
Prescribed fluid Mixture of 50% water and 50% fluid for sealed cir-
cuits
Sealing pressure Cap calibrated at 0.9 bar
THERMOSTAT
Specification Desc./Quantity
Type Wax-type, with deviator
Starts opening 82 ± 2°C
ELECTRIC VENTILATION
Specification Desc./Quantity
Type With piston
Electric ventilation start 107°C
Electric ventilation end 103°C
WATER PUMP
Specification Desc./Quantity
Type Centrifugal
Control Coaxial at the countershaft
RADIATOR
Specification Desc./Quantity
Type Aluminium, with horizontal circulation
EXPANSION TANK
Specification Desc./Quantity
Calibration Automatic bleeding, in parallel with the radiator
Electric fan check
- Connect the injection diagnostic tester and select
the menu on the "ERRORS" function.
- Check any failures in the electric fan control cir-
cuit (see "Injection" chapter)
Specific tooling
020460Y Scooter diagnosis and tester
MP3 400 i.e. Cooling system
COOL SYS - 3
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