Manitowoc Grove GRT8120, Operator'S Manual

Page: 100 / 448

OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL
3-26
Published 3-22-2021, Control # 702-02
Armrest Adjustment Buttons
The Armrest Adjustment Buttons (24, Figure 3-9) are located
under the rear of the armrest.
The buttons allow the left and right armrest to be rotated.
Push and hold button to allow the entire armrest to be
rotated. Release button to lock the armrest in the desired
position.
Seat Heat Switch (Optional)
The Seat Heat Switch (25, Figure 3-9) is a three-position,
rocker type switch located at the front of the seat cushion.
Push bottom of switch to cause seat heater to operate at a
low temperature. Push top of switch to cause seat heater to
operate at a high temperature. Set switch to center position
to cause seat heater to go off.
Seat Headrest (Not Shown)
The Seat Headrest (26, Figure 3-9) is located at the top of
the seat backrest.
Pull up to raise the head rest. Push down to lower the head
rest.
Hoist Rotation Indicators
Hoist Rotation Indicators (27, Figure 3-9) for auxiliary and
main hoists are located at mid-stick, facing the operator on
each dual-axis hoist controller (2, 21, Figure 3-9).
The Hoist Rotation Indicator pulses on the auxiliary or main
hoist controller (2, 21) when its related hoist is operating.
The pulsing, felt by the operator’s hand, indicates to the
operator that the hoist is operating.
The Hoist Rotation Indicator also makes an audible click
when it pulses.
The frequency of the pulses and clicks increases and
decreases as the hoist speed increases and decreases.
Seat Switch
The Seat Switch (28, Figure 3-9) is located within the seat.
The operator must be sitting in the seat, enabling the switch,
before any crane functions can be operated.
FIGURE 3-12
Item Description
1 Seat Front Adjustment Switch
2 Seat Rear Adjustment Switch
3 Seat 4-Way Adjustment Switch
9838-12
3
2
1