OPERATOR'S MANUAL MAINTENANCE

Section C - Electrics
Basic System Operation
Servo Isolator
C-46 C-46
9803/9880-3
Servo Isolator
Operation
C005540GB-2
Fig 47.
The operator has the ability to isolate the excavator
controls by pressing the isolator switch on the facia switch
panel.
When the Isolator switch is pressed both the warning lamp
and the switch status indicator are illuminated. ECU1 now
de-energises the output to the isolator solenoid valve o/p
21 (C-36).
A second press of the isolator switch extinguishes both the
warning lamp and the switch status indicator. ECU1 now
energises the isolator output o/p 21 (C-36) and provided
the lever lock is in the correct position, operation of the
excavator controls is possible