Grove Published 3-22-2021, Control # 702-02 5-35
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION
14. Using an impact drill and 24-inch 1/2-inch impact drill
extension, retract the boom extension installation pins.
15. Using the auxiliary crane and the tag line, remove the
boom extension from the boom nose. Move the boom
extension to a suitable location.
Erecting the 17.6 m (57.6 ft) Boom Extension
Use the following procedure to erect the boom extension.
NOTE: This procedure assumes the boom extension base
and fly sections are stowed on the side of the main
boom.
1. Make sure the counterweight is installed. For more
information, 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. Connect boom extension electrical connectors. For
more information, see Boom Extension Electrical
Connections, page 5-51.
5. If erecting a hydraulic boom extension, connect
hydraulic hoses. For more information, see Hydraulic
Boom Extension Connections, page 5-52.
6. If erecting an optional hydraulic boom extension, make
sure the angle indicator (1, Figure 5-41) 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.
7. In the ODM, verify that the front and rear mounting pins
are securely installed (Figure 5-42). Visually confirm that
the pins are installed.
DANGER
When removing the boom extension, make sure the boom
extension is properly supported by the auxiliary crane and
the movement of the boom extension is controlled at all
times.
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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