Fuel Control Circuit - Kubota u15-3 Workshop Manual

l. Fuel control circuit
(1) Function)
OFF
10A
AC
B
Start
ON-36-1
Engine stop solenoid
Injection pump
Idling limitter
1. The fuel control circuit is mainly composed of the following devices.
1)Fuel feed pump
2)Engine stop solenoid
3)Fuel gauge
4)Fuel sensor
5)Fuel residual sensor
2. The fuel sensor detects the position of the float and the remaining fuel amount is displayed in the fuel
gauge.
3. The fuel residual sensor has a thermistor. When the sensor is well below the fuel level, the resistance
value is high enough to allow no current to the warning lamp. If the fuel level has dropped below speci-
fied, however, the thermistor gets exposed to the air and becomes smaller in resistance. This allows the
current to flow to the warning lamp that will light up.
Fuel pump
ON-24-1
ON-24-2
ON-1-8
ON-1-5
ON-36-2
ON-36-1
Engine stop SOL
ON-1-1
15A
ON-1-13
ON-1-15
Control rack
II-153
E. Oil Pressure ON-1-2
E. Oil Press
Charge
ON-1-3
Charge
ON-1-4
ON-1-7
Travel Hi - Lo
ON-1-6
Glow
ON-1-11
Fuel
ON-1-10
ON-1-11
ON-1-12
ON-1-17
1234.5
Back light
ON-1-14
Fuel
ON-1-20
Water temp
Solenoid guide
Stop lever
Engine stop solenoid
WSM U15-3
ON-335-4 E. Oil switch
ON-28
ON-334-4
Alternator
Hi - Lo solenoid
Glow relay
Fuel sensor
ON-23-3
ON-23-2
ON-23-1