Fuel Quantity; Coolant Temperature - Kubota B1830 Workshop Manual

B1830,B2230,B2530,B3030, WSM

[1] FUEL QUANTITY

[2] COOLANT TEMPERATURE

Fuel Level Sensor
The remaining fuel quantity is detected by the fuel
level sensor installed in the fuel tank and indicated on the
fuel gauge. For detection, a float and a resistor are used.
As the float (1) lowers, the resistance of the variable
resistor (2) varies. The relation between the amount of
fuel and the resistance is as follows.
F
1 to 5 Ω 27.5 to 37.5 Ω
(1) Float
Coolant Temperature Sensor
The coolant temperature sensor is installed to the
cylinder head of engine, and its tip is in touch with the
coolant. It contains a thermistor (4) whose electrical
resistance decreases as the temperature increases.
Current varies with changes in the coolant
temperature, and the increases or decreases in the
current move the pointer of gauge.
Characteristics of Thermistor
Temperature
50 °C (122 °F)
80 °C (176 °F)
120 °C (248 °F)
170 °C (338 °F)
(1) Terminal
(2) Insulator
9-M32
ELECTRICAL SYSTEM
1/2 E
103 to 117 Ω
(2) Variable Resistor
9Y1210003ELM0034US0
Resistance
148.8 Ω
50.3 Ω
16.0 Ω
5.6 Ω
(3) Body
(4) Thermistor
9Y1210003ELM0035US0
KiSC issued 05, 2012 A