OPERATING CONTROLS GRT655/655L OPERATOR MANUAL
3-16 Published 3-23-2020, Control # 654-04
Emergency Stop Switch
The crane Emergency Stop Switch (21, Figure 3-8) is
located on the lower right console and is used to shut down
the crane’s engine. Pushing the red button stops the engine
and causes the Emergency Stop Indicator (16, Figure 4-18
and Figure 4-19) on the Operator Display Module (ODM) to
come on (red). Rotate and pull out knob to resume normal
operation.
Level Indicator
The Level Indicator (22, Figure 3-8) is located on the lower
right console near the Emergency Stop Switch. The indicator
provides the operator with a visual aid in determining the
levelness of the crane.
Deadman Switches
(Optional) (Dual Axis
Controllers only)
Deadman Switches (23, Figure 3-8) are located on the front
of both controllers. Either of these switches can be used
instead of the seat switch to keep crane functions active.
Hoist Speed Toggle Switches
The Hoist Speed Toggle Switches (24, Figure 3-8) are thumb
operated three-position center spring return switches. Push
and hold switch closest to the operator to change hoist
speed to high – release switch to return hoist speed to
normal. Push and release switch farthest from the operator
to change hoist speed to high – push and release switch
again to return hoist speed to normal.
Horn Button
The Horn Button (25, Figure 3-8) is located on the upper
front of the right controller. The button sounds the horn
during crane operations.
Free Swing Button
The Free Swing Button (26, Figure 3-8) is located on the
upper front of the left controller. Pressing and holding the
Free Swing Button releases the Swing Brake and allows the
boom to be centered over the load.
Cab Door Release Lever
Use the Cab Door Release Lever (27, Figure 3-8) to open
and close the cab door from inside the cab.
Hoist Rotation Indicators (Not Shown)
Hoist Rotation Indicators (28, Figure 3-8) for auxiliary and
main hoists are located at mid-stick, facing the operator on
each dual-axis hoist controller (1, 2, Figure 3-8). Each
indicator is electronically driven by an input signal from a
sensor attached to its related hoist and an output signal from
a control module. Each hoist controller (1, 2) pulses when its
hoist is running so the operator’s thumb can sense it.
Seat Switch (Not Shown)
This switch (29, Figure 3-8) is located within the seat. An
operator must be sitting in the seat, enabling the switch,
before any crane functions can be activated.
Optional Deadman Switches are available on cranes
equipped with Dual Axis Controllers [Deadman Switches
(Optional) (Dual Axis Controllers only), page 3-16]. Pressing
a Deadman Switch allows the crane functions to remain
active when the operator is not sitting in the seat.
Main Hoist Controller (Single Axis Option)
The Main Hoist Controller (1, Figure 3-9) is located on the
right armrest. Pushing the controller forward lowers the hoist
rope and pulling the controller rearward raises the hoist rope.
Boom Lift Controller (Single Axis Option)
The Boom Lift Controller (2, Figure 3-9) is located on the
right armrest. Pushing the controller forward lowers the
boom and pulling the controller rearward raises the boom.
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