II-148
WSM Minor Change II Service Engineering Section
5. Behavior when the control lever is operated:
• AI pressure switch at ON and accelera-
tor knob at MAX:
When the control lever is operated (left
swivel, for example), the control valve is
activated to cut off the oil flowing from
the pilot pump. The primary pilot pres-
sure is applied to turn off the pressure
switch.
The AI controller functions to run the AI
motor so that the engine governor
should reach maximum position. The
engine speed rises quickly to maximum
rpm.
M
C7
B1
C6
CPU
A2
A3
12V
Electric accelerator
Engine speed indication
AI controller
AI motor
Acceleration cable
Motor drive
Machine status (operation or neutral)
Governor position
Governor potentiometer
Governor lever
AI pressure switch
Control lever
Pilot valve
Pilot pump
Activated
Neutral
Accelerator
Idle
Engine speed
Time
knob position
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