Manitowoc Grove GRT9165 User Manual

OPERATING PROCEDURES GRT9165 OPERATOR MANUAL
4-140 Published 7-23-2020, Control # 668-02
Retracting and locking a telescopic section
During telescoping motion you are not to select Lock. Under
no circumstances, while the tele cylinder is moving, should
you select and press the symbol (4, Figure 4-136).
• Make sure section pins are retracted (unlocked), then
retract the telescopic section slowly and as far as
possible; refer to (Table 4-1) for the expected value for
the precision length sensor (Item 2 in Figure 4-135)
when the boom sections are at the different locking
positions.
• Now select and confirm the symbol (1, Figure 4-139).
• After tele section has been locked to outer section,
retract the tele cylinder approximately 15mm to 30mm to
set down the tele section (refer to Locking points for the
telescopic sections, page 4-142).
The telescopic section can be locked (if the actuator is
able to release the section pins, and the telescoping
boom section is actually aligned with a pinning hole).
The screen should appear as shown in Figure 4-140. In
particular, S2110N should be OFF and S2111N and
S2122N should be ON.
Unlocking the Telescoping Cylinder
If the telescopic section is locked (typically indicated by
Figure 4-137), you can now attempt to unlock the
telescoping cylinder.
• Select and confirm the symbol (3, Figure 4-136).
The telescoping cylinder is unlocked. In the unlocked
position, the screen should appear as indicated by
Figure 4-140. The telescoping cylinder is unlocked from any
telescoping boom section (unlock symbol shown near the
graphical representation of the tele cylinder - refer to Item 1
in Figure 4-136.
The telescoping boom section is locked (the unlock symbol
is not shown near the graphical representation of the section
pins - refer to Item 2 in Figure 4-136).
In the top row of the proximity switches, S2111N and S2122N
are on, the other in the row is off. In the middle row of the
proximity switch S2118N is on, but the others are on or off
depending on the location of the tele cylinder with respect to
telescoping boom sections.
You can now move the telescoping cylinder into the next
telescopic section, refer to Table 4-2 for the expected value
for the precision length sensor (Item 2 in Figure 4-135) when
the tele cylinder is near a connection to a boom section.
CAUTION
Machine damage hazard!
If you select Lock during telescoping, the locking pins on
the telescopic section are slid out immediately and they
can damage or tear the electrical or hydraulic components
in the main boom.
FIGURE 4-139
10055-1
1
WARNING
Risk of damage to main boom!
You can select and confirm the symbol for unlocking the
telescopic cylinder. If this does not start the unlocking
procedure, contact your local distributor or Manitowoc
Crane Care.
FIGURE 4-140
10055-3

Manitowoc Grove GRT9165 Specifications

General

Brand	Manitowoc
Model	Grove GRT9165
Category	Construction Equipment
Language	English