Komatsu Galeo PC138US-8 Shop Manual page 288

SEN02553-01
Fuel control dial
1. Knob
2. Dial
3. Spring
4. Ball
5. Potentiometer
6. Connector
Function
Installed in the right console box. Potentiome-
q
ter (5) is installed inside knob (1). Turning knob
(1) causes potentiometer (5) shaft to rotate.
This rotation changes the resistance of the
q
variable resistor within potentiometer (5), and a
throttle signal is sent to the controller.
The hatched areas in the graph are error
q
detection areas. If the throttle voltage is within
the area, the engine drops down to low idle.
30
10 Structure, function and maintenance standard
PC138US, USLC-8