VESPA LX 4T USA, Workshop Manual, Page: 117 / 194

- Fit the accelerating pump diaphragm cover and
tighten the 2 fixing screws making sure the spring
below is correctly positioned.
- Fit the rubber bellows protecting the pin in the
upper part of the accelerating pump.
Level check
- Tilt the carburettor so that the needle valve at the
fuel supply is closed and the float weight does not
affect it.
- Check that the diaphragm closing line and the
float central line are parallel as shown in the figure.
- Blow air in to the tank and then assembly it and
its gasket on the carburettor body with the 3 fixing
screws.
N.B.
-ALWAYS USE NEW RINGS AND GASKETS FOR REFIT-
TING.
WARNING
THE SCREW IN THE TANK BOTTOM IS A BLEEDING ONE
AND CONSEQUENTLY IT ONLY REQUIRES CLEANING.
- Insert the diaphragm into the throttle valve.
- Insert the tapered pin together with the plastic
support and the contrast spring into the throttle
valve.
N.B.
PLACE THE SPRING PLASTIC SUPPORT WITH ITS TEETH
FACING THE INNER SIDE OF THE MEMBRANE TO BE
ABLE TO FIT THE LOWER END OF THE THROTTLE VALVE
SPRING.
LX 4T USA
Engine
ENG - 117