Float System
The float system consists of a float chamber, a
float, a float needle valve and seat, and needle
valve filter. Fuel from the fuel pump enters the
float chamber, passing through the needle valve
filter and the needle valve.
The float’s function is to maintain a constant
level in the chamber.
As the fuel level in the chamber drops, the float
and the needle valve drops down allowing the
fuel to enter the chamber. As the fuel enters
the chamber, the float and the needle valve
again rise to close the fuel inlet.
A constant fuel level in the chamber is maintain-
.
ed through the repetition of this cycle.
1. Float
2. From fuel pump
3. Needle valve filter
4. Needle valve seat
5. Needle valve
Fig.
4-
1-3 Float system
4-5