PIAGGIO 500 cc, Service Manual

Page: 166 / 239

Fuel injection
9 - 54
Fuel filter control
For the fuel filter control, check:
- Free flow capacity. See page 9-52
- Current absorbed by the pump. See page 9-53
An obstructed filter causes:
- Performance decline, especially at full power
- Increased pump absorption
NOTE: Do not blow the filter with compressed air.
A damaged filter may cause blocking of the injector.
Pump support overhaul
To remove the pump support from the tank, proceed as
follows:
- Disconnect the electrical connection
- Start the engine and wait for it to stop spontaneously
- Clean the tank and the pump support (if necessary
wash and blow dry with compressed air)
- Disconnect the delivery and return pipes by means of
the quick-connections (see page 9-46)
- Expect possible sprays of fuel.
- Unscrew the pump support fixing ring nut (right-
threaded twist)
- Remove the pump support and the gasket
NOTE: carry out the extraction operation paying atten-
tion not to bend the float arm.
Warning