Manitowoc Grove GRT880 User Manual

Grove Published 3-25-2020, Control # 643-04 4-11
GRT880 OPERATOR MANUAL SET-UP AND INSTALLATION
4
BI-FOLD SWINGAWAY, OFF-SETTABLE
BOOM EXTENSION
Description
A 10 m to 17 m (33 ft to 56 ft) bi-fold swingaway, manual
off-settable boom extension provides additional boom reach.
The boom extension weighs approximately 1,102 kg
(2,430 lb).
The boom extension is stowed on the right side of the boom
base and is easily attached or removed from the boom nose
using a remotely operated electric extension support and two
stowage pins.
Throughout the following instructions the lattice section
portion of the boom extension is referred to as the boom
extension base section and the solid steel boxed section
portion is referred to as the boom extension fly section.
Erecting Boom Extension
Refer to Figure 4-20.
1. Fully extend and set outriggers.
2. Position boom over front of crane.
3. Fully retract the boom.
4. Lower boom to minimum elevation.
5. Lower front outriggers until front wheels are on ground.
NOTE: Auxiliary boom nose (rooster sheave) does not
have to be removed. If reeved, remove hoist cable
from sheave.
6. Rig main hoist or optional auxiliary hoist cable for single
part line with only wedge socket on cable end.
7. Attach rope to tip of boom extension base section to help
swing it around to the front of the boom nose.
8. Remove caps and connect boom extension mount
control pendant to connector on front of boom base.
NOTE: If erecting boom extension base section with
boom
extension fly section, skip to step 11.
If erecting boom extension base section without
boom extension fly section, perform steps 9 and
10.
9. Move locking bar (9, Figure 4-20; 2, Figure 4-13) to
boom base attachment bar (1) and install pin (3). Secure
with retaining clip.
10. Remove attachment pin connecting the boom extension
fly section to the boom extension base section. Stow
attachment pin in the stowage holder on the boom
extension base section and secure with retaining clip.
Skip to step 12.
11. Remove attachment pin securing the boom extension fly
section to the rear stowage bracket assembly
(1, Figure 4-20) on the boom base. Stow attachment pin
in the stowage holder on the boom extension base
section and secure with retaining clip.
DANGER
Before attempting to erect or stow the boom extension,
read and follow all safety decals installed on the boom,
boom nose, boom extension, and stowage brackets.
Lifting over the boom extension base section is strictly
prohibited when boom extension fly section is erected or
folded along side of the boom extension base section.
CAUTION
If boom extension fly section is not to be erected,
disconnect it from boom extension base section and keep
attached to boom stowage brackets on main boom base.
DANGER
Uncontrolled movement of the boom extension fly section
can cause death, injuries, or damage to equipment.
Ensure attachment pin securing the boom extension fly
section to the boom extension fly section rear stowage
bracket is in place
FIGURE 4-12
FIGURE 4-13
6642-8
2
6642-9
1
3
2
3
1

Manitowoc Grove GRT880 Specifications

General

Brand	Manitowoc
Model	Grove GRT880
Category	Construction Equipment
Language	English