Elliott Digger Derrick, Operation & Maintenance Manual, Page: 66 / 376

Digger Derrick Op. Controls Sitting EEC-0172
V1.0
Operating Controls-Digger
Derrick
G. Master Switch – Emergency Stop Switch
To switch Master Switch to “ ON ” position, red Emergency Stop Switch must be
opened and toggle switch set to the on position. Any time the red Emergency Stop
Switch is closed, the master switch will move to the off position and crane functions
will be disabled.
H. Range – High/Low Switch
With this switch set on High, full activation of the joystick will move the valve spool to
its maximum flow position. Setting this switch at Low, full movement of the joystick
will move the control valve spool approximately 50% of the spool travel. Setting this
switch at Low does not necessarily provide half speed of the function. The operator
can toggle back and forth between these options based on load or proximity of the
crane to other objects.
I. Pole Shift Tilt
This momentary switch is used to tilt the boom-mounted pole grab. Pressing the
switch in the “UP” direction will tilt the pole grab back towards the boom. Pressing
the switch in the “DOWN” direction will tilt the pole grab away from the boom.
J. Pole Grab Claw
This momentary switch is used to open and close the claws of the pole
grab. Pressing the switch in the “OPEN” direction will spread the claws apart and
release the pole. Pressing the switch in the “CLOSE” direction will pull the claws
together to grab the pole.
K. Joystick Enable Switch
This momentary switch enables all lower operator joystick functions. Pressing the
switch in the “ ON ” direction enables joystick function. Joystick inactivity for more
than 14 seconds automatically disables all joystick functions, and the switch must be
pressed to resume functionality.