Ai Motor Normal-Turn Circuit - Kubota KX91-3a Workshop Manual

WSM Minor Change

6. AI motor normal-turn circuit

Engine speed sensor
Power
Behavior:
1. The acceleration sensor signal and governor sensor signal are fed to the motor position control cir-
cuit.
2. The motor normal/reverse-turn circuit serves to select the AI motor turning direction based on the
lever position by the operator.
3. When the normal turn is selected as shown in the figure, the base current flows to the transistor Tr1.
Now the battery current flows for running the AI motor in the normal direction.
OFF by operating
the lever
AI pressure
switch OFF
Acceleration sensor
Governor sensor
Acceleration cable
AI relay
AI motor normal turn
AI controller unit
Speed
detection
AI effective with
engine started
AI pressure switch signal
Voltage change
Engine speed signal
Accelerator level position signal
Governor position signal
AI motor
return circuit
Error detection
setting circuit
II-149
II Service Engineering Section
AI control
timer circuit
AI SW
AI LED
Current motor
Motor position
position
control circuit
confirmed
Motor normal/
reverse-turn
circuit
Normal
Normal
Output
LCD