5-42 Published 3-22-2021, Control # 702-02
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL
9. Disconnect the electrical connections between the boom
extension base section and the fly section:
a. Remove the plugs (1, Figure 5-62) from the sockets
and seal the plugs with their caps (2). Seal the
sockets with their caps (3).
b. Remove the bridging plug from the dummy socket
and plug it into the socket.
10. Remove the tag line from the end of the fly section.
Stowing the 17.6 m (57.6 ft) Boom Extension
Use this procedure to stow the boom extension to the side of
the main boom.
NOTE: This procedure assumes the fly section is stowed
on the boom extension base section. For more
information about stowing the fly section, see
Stowing the Fly Section, page 5-41.
1. Make sure the crane is set up on fully extended
outriggers. For more information, see Using the
Outriggers, page 4-19.
2. Make sure the counterweight is installed. For more
information about installing the counterweight, see
Counterweight Removal and Installation, page 5-66.
3. Fully retract and lower the boom to horizontal.
4. If necessary, adjust the boom extension offset to 0°
depending on the type of boom extension:
• If stowing a mechanical boom extension, make sure
the offset is set to 0°. For more information, see
Offsetting the Mechanical Boom Extension, page
5-56.
or
• If stowing an optional hydraulic boom extension,
make sure the angle indicator (1, Figure 5-63) is
aligned. If the arrows are not aligned, adjust the
boom extension offset as needed to align the
arrows. For more information, see Offsetting the
(Optional) Hydraulic Boom Extension, page 5-57.
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, do not stand on crane
decking unless boom extension is secure.
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