Manitowoc Grove GRT8120, Operator'S Manual

Page: 162 / 448

OPERATING PROCEDURES GRT8120 OPERATOR MANUAL
4-32
Published 3-22-2021, Control # 702-02
Telescoping will only start if left arrow for retracting
(1, Figure 4-12) or right arrow for extending (2) is shown in
the indicated location of the operating display screen (either
the semi-automation or manual telescoping screen).
You can regulate the telescoping speed by moving the
controller or changing the engine speed.
NOTE: With certain telescoping states, the RCL will switch
t e l e s c o p i n g o ff , e . g . w h e n y o u l e a v e t h e
telescoping lengths or when the working range limit
has been reached, refer to
RCL Shutdown, page
4-169 .
Disabling the Telescoping Mechanism
If the telescoping function is not required, it should be
disabled to avoid accidental use.
Push the Boom Telescope Enable/Disable Switch on left
armrest to disable the boom lift function.
The Boom Telescope Enable Indicator in the Status Bar area
(Figure 4-73) of the Operator Display Module (ODM) will
change from green to blue.
Manual Telescoping
To telescope manually, the operator must initiate some
locking and unlocking processes. The locking and unlocking
processes are carried out automatically.
The following sections describe the operating procedures:
• Checking the initial position (page 4-32)
• Unlocking the telescoping cylinder (page 4-33)
• Extending/retracting the telescoping cylinder (without
tele section) (page 4-34)
• Locking the telescoping cylinder (page 4-35)
• Unlocking the tele section (page 4-36)
• Telescoping the tele section (page 4-36)
• Locking the tele section, refer to (page 4-37)
NOTE: The operating order depends on the current initial
position. For an overview of a telescoping process
(example), refer to
Telescoping Process, page
4-28 .
NOTE: The lengths given in the following illustrations are
sample values, and may differ from the current
display.
Checking the Initial Position
Before telescoping, the operator must check the following:
• Current telescope status
• Position of the telescoping cylinder
• Position of the locking pins
To do so, open the ODM main menu by pressing the button
(1, Figure 4-13) or (2) once.
Open the Manual telescoping menu (1, Figure 4-14).
10254-6a
FIGURE 4-12
1 2
8849-45
FIGURE 4-13
10254-4
FIGURE 4-14
1