5-30 Published 3-22-2021, Control # 702-02
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL
Installing the Folding Boom Extension
Use this procedure to install the boom extension base
section with or without the fly section that are separate from
the crane on to the boom nose.
NOTE: This procedure assumes the boom extension is
completely removed from the boom nose and the
fly section is stowed on the boom extension base.
NOTE: This procedure applies to manual and hydraulic
boom extensions unless otherwise noted.
NOTE: An auxiliary crane with sling is required to install
the boom extension on to the boom nose.
1. Make sure the counterweight is installed. For more
information about installing the counterweight, see
Counterweight Removal and Installation, page 5-66.
2. Make sure the crane is set up on fully-extended
outriggers. For more information, see Using the
Outriggers, page 4-19.
3. Fully retract and lower the boom to horizontal.
4. Attach a tag line to the end of the boom extension base
section with the nose sheave.
5. Make sure the connecting link (1, Figure 5-33) is in
place that connects the fly section to the boom extension
base section.
6. Make sure the attachment pin (1, Figure 5-34) and
retaining clip are in place that connects the ends of the
fly section and the boom extension base section
together.
DANGER
Boom Extension Hazard!
To avoid death or serious injury, follow procedures and
cautions in the Operator and Safety Manuals and decals
during erection, stowage and use of boom extension.
Install and secure all pins properly and control boom
extension movement at all times.
DANGER
To prevent serious injury or death, always wear personal
protective equipment; i.e., a hard hat, eye protection,
gloves and metatarsal boots.
Required Tools
• 1/2 in Impact Wrench
• 24 in — 1/2 in Drive
Impact Extension
• 1/2 in Square Drive
Socket — 14mm
impact rated hex
socket
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