MOTO GUZZI CALIFORNIA EV 1997-2000, Workshop Manual

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A
B
C
D
E
F
G
H
I
L
M
N
O
P
8 F
UEL SYSTEM
A
B
D
C
4 ELECTRICAL FUEL PUMP “1”
The motorbike is equipped with a volumetric roller type
electrical pump whose motor is immersed in the fuel.
The motor is composed of brushes with permanent
magnet excitation.
When the impeller rotates, driven by the motor, it
generates volumes which move from the intake gate to
the delivery gate. These volumes are delimited by rollers
which adhere to the external ring while the motor is
rotating. The pump is fitted with a check valve which is
necessary in order to prevent the fuel circuit from emptying
when the pump is not working.
It is also equipped with an pressure valve, which short-
circuits the delivery with the intake when the pressure
exceeds ~5 bar, thereby preventing the electrical motor
from overheating.
N.B.
Always make sure the system is clean when
disassembling and assembling the piping and
the components.
Disassembly:
• Remove the left-hand side body panel as described
in chapter 3 section E;
• Disconnect the two electric wirings from the pump and
mark their position for the following reassembly;
• Remove the fuel inlet pipe “A” from the pump by
loosening the respective clamp;
• Remove the fuel outlet pipe “B” from the pump by
loosening the respective clamp;
• Unscrew and remove the 2 screws “C”;
• Remove the pump “D” from the chassis with the
relevant support clamp.
Reassembly:
Carry out the procedures in reverse order.