5-32 Published 3-22-2021, Control # 702-02
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL
c. Install the fourth pin. Secure the fourth pin with
retaining clip.
d. Turn the nob (3) to relieve the pressure to retract the
jack pin.
13. Connect the boom extension electrical connector to the
main boom electrical connector. For more information,
see Boom Extension Electrical Connections, page 5-51.
14. Make sure the boom extension is shown as erected in
the ODM (Figure 5-38).
15. If installing the hydraulic boom extension, connect
hydraulic hoses. For more information, see Hydraulic
Boom Extension Connections, page 5-52.
16. Remove the slings from the boom extension.
17. Raise the mast sheave assembly. For more information,
see Folding Mast Sheave, page 5-59.
18. Reeve the hoist rope. For more information, see
Reeving the Hoist Rope, page 5-55.
19. Remove the anti-two block switch from the auxiliary
boom nose. For more information, see Anti-Two Block
(A2B) Switch, page 5-10. Install the anti-two block switch
on the boom extension. For more information, see
Anti-Two Block Switch on the Boom Extension, page
5-58.
CAUTION
After installing the fourth pin, turn the pressure relief nob
(3) to retract the jack so the jack does not contact the
boom nose. Failure to retract the jack could result in
damage to the boom extension jack.
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