5-44 Published 3-22-2021, Control # 702-02
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL
13. 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
the ramps of the front (6, Figure 5-27) and rear (1) boom
extension mounting brackets.
14. Raise 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.
15. From the operator cab or with the remote control, lock
the front boom extension pin (Pin #2) as follows:
a. Use the ODM control pad arrow buttons or jog dial
to highlight the Pin #2 lock icon.
The lock icon highlights (orange).
b. Press and hold the OK on the ODM control pad or
press down on the jog dial.
Pin #2 is extended. The pin status indicator icon
turns green when the pin is fully extended and the
boom extension is displayed in the intermediate
installation position.
16. Make sure the ODM shows that the front mounting pin
(Pin #2) is extended. Visually confirm that the front
mounting pin is securely installed and the handle is in
the up position before continuing.
17. Lower the boom to a horizontal position.
18. Turn the jack screw (3, Figure 5-39) clockwise with the
impact wrench, extension, and 14 mm impact socket to
retract the boom extension installation pins (4) from the
boom nose.
19. Using the tag line, swing the boom extension towards
the boom until the boom extension engages the rear
stowage bracket. Raise the boom as necessary to help
the boom extension engage the rear stowage bracket.
20. In the ODM, highlight the lock icon and the extend the
rear boom extension pin (Pin #1) as follows:
DANGER
When stowing the boom extension, make sure that all
personnel and equipment are kept clear of the swing path.
DANGER
Crush Hazard
To avoid death or serious injury, make sure the front
mounting pin (Pin #2) is installed and the handle
(1, Figure 5-40) is in the up (locked) position prior to
retracting the boom extension installation pins
(4, Figure 5-39).
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