Grove Published 3-22-2021, Control # 702-02 5-49
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION
7. 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 5-69) 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.
8. Stow the mast sheave assembly. For more information,
see Folding Mast Sheave, page 5-59.
9. Attach a tag line to the tip of the boom extension base
section near the sheave.
10. Make sure the boom extension installation pins
(4, Figure 5-39) are engaged.
11. Detach the boom extension base section from the boom
nose by removing the four retaining clips (6) and pins
(5, Figure 5-39) from the boom extension anchor fitting
holes (1) and the boom nose attachment lug holes (2).
Store the pins (5) and retaining clips (6) on the boom
extension stowage bracket.
12. Slightly raise and/or lower the boom to help control the
boom extension. Using the tag line, swing the boom
extension to the intermediate position on the side of the
base section of the boom. Make sure the wheels engage
on the front and rear boom extension ramps.
13. Raise and lower the boom as needed to move the boom
extension in against the main boom so the front boom
extension pin (Pin #2) can be secured.
14. From the operator cab, lock the front mounting pin (Pin
#2 in the ODM) as follows:
a. Use the ODM navigation pad arrow buttons or jog
dial to highlight the Pin #2 lock icon.
The lock icon is highlighted (orange).
DANGER
Boom Extension Hazard!
The boom extension installation pins (4, Figure 5-39)
must be extended and engaged before removing the four
pins (5) from the boom extension anchor fitting holes (1)
and the boom nose attachment lug holes (2). If the boom
extension installation pins (4) are not extended and fully
engaged, the boom extension will fall when pins (5) are
removed, resulting in possible injury or death.
CAUTION
After removing the four retaining clips and pins, the boom
extension is free to swing to the side of the main boom.
DANGER
When stowing the boom extension, make sure that all
personnel and equipment are kept clear of the swing path.
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