Hydraulics Control And System Maintenance - PIAGGIO 500 cc Service Manual

Fuel injection

Hydraulics control and system maintenance

Before carrying out controls concerning system pres-
sure, carefully clean all the components of the supply
system.
To carry out the controls the special tool 020480Y from
the fuel pressure control kit is required.
Before proceeding to detach any quick-connection
reduce system pressure.
Disconnect the electrical connection from the pump
support while the engine is turning over and wait for it to
stop.
The engines stops at around 1.5 bar.
WARNING: disconnect the tube terminal with cau-
tion. Prevent spraying in the eyes.
The special tool has quick-connections of the same
kind as those in the system.
To disconnect the female terminals (injector side) it is
necessary to push the two appendices then pull
outwards.
Warning
- Do not use force if the terminal does
not come out; try to turn it. The system is created in
such a way that if traction is increased, the terminal
blocks further.
To disconnect the male terminals (pump side) it is
necessary to push the coaxial tube rings towards the
pump support and extract the terminals.
Warning
- Do not use force if the terminal does
not come out; try to turn it. The system is created in
such a way that if traction is increased, the terminal
blocks further.
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