Manitowoc Grove GRT8120 User Manual

OPERATING PROCEDURES GRT8120 OPERATOR MANUAL
4-28 Published 3-22-2021, Control # 702-02
Telescoping Process
The state shown in Figure 4-6 should be the starting point for
a telescoping process. The telescoping processes consist of
4 steps:
1. Unlocking the telescoping cylinder
The locking pins (5, Figure 4-6) retract – the telescoping
cylinder is unlocked.
2. Moving and locking the telescoping cylinder
The telescoping cylinder moves into the section to be
telescoped, e.g. telescopic section T3 (3, Figure 4-7).
The cylinder locking pins (5) extend – the telescoping
cylinder is locked.
3. Unlocking the telescopic section
(A, Figure 4-8) – When a telescope section is locked at
the 50%, 92%, or 100% position, the telescoping
cylinder extends until the locking pins (7) for that section
are clear. When a section is fully retracted and locked at
the 0% position, there is no liftoff process. The boom
section is supported at the front of the section by the
stop blocks instead of by the locking pins. Because of
this, the 0% locking holes are oversized, and the locking
pin never touches the bottom of the hole.
(B) – The mechanism (10) retracts the locking pins (7) –
the telescopic section is unlocked.
8849-117
FIGURE 4-6
8849-118
FIGURE 4-7
8849-119
FIGURE 4-8

Manitowoc Grove GRT8120 Specifications

General

Brand	Manitowoc
Model	Grove GRT8120
Category	Construction Equipment
Language	English