Manitowoc Grove GRT8120 User Manual

OPERATING PROCEDURES GRT8120 OPERATOR MANUAL
4-36 Published 3-22-2021, Control # 702-02
Unlocking the Telescopic Section
Unlocking a telescopic section is required for the telescopic
section to be telescoped.
The telescoping cylinder and the telescopic section cannot
be unlocked simultaneously.
Prerequisites
Telescoping function enabled – symbol (3, Figure 4-25)
green
Telescopic section locked – symbol (1) green
Telescoping cylinder locked – symbol (2) green
Unlock
1. Select the symbol (4, Figure 4-25).
2. Confirm the selection – the locking pins will retract.
Symbol (1, Figure 4-26) red.
If symbol (1) is not red after approx. 10 seconds, this means
that the locking pins are under load.
To relieve the load, carefully retract and extend a little.
If removing the load does not cause unlocking, you must lock
the telescopic section (Locking the Tele Section, page 4-37)
and restart unlocking.
Telescoping the Tele Section
The tele section can be telescoped once it is unlocked.
Prerequisites
• Telescoping mechanism enabled – symbol
(3, Figure 4-27) green
• Telescoping cylinder locked – symbol (2) green
• Telescopic section unlocked – symbol (1) red
FIGURE 4-25
10254-7
3
2
1
4
CAUTION
Boom System Damage!
If extending and retracting several times does not lead to
the lock being released, you must not telescope any
further against the stop.
FIGURE 4-26
10254-9
1
FIGURE 4-27
10254-9
3
2
1

Manitowoc Grove GRT8120 Specifications

General

Brand	Manitowoc
Model	Grove GRT8120
Category	Construction Equipment
Language	English