Grove Published 3-25-2020, Control # 643-04 4-21
GRT880 OPERATOR MANUAL SET-UP AND INSTALLATION
Stowing
NOTE: When removing the insert, the boom extension fly
section of the boom extension may be in the
erected position or folded against the boom
extension base section.
1. Fully extend and set outriggers.
2. Position boom over front of crane.
3. Fully retract the boom.
4. Set offset to 0° if not already done so. Refer to Setting
Boom Extension Manual Offset, page 4-16.
5. Lower boom to minimum elevation.
6. Remove cable retainer pins and clip pins from boom
extension tip and mast assembly (if required). Remove
hoist cable from boom extension sheave and/or mast.
Install cable retainer pins and clip pins.
7. Disconnect anti-two block electrical connections
between the insert and the boom nose and boom
extension.
8. If required, stow the boom extension fly section by
performing step 10 under Stowing Boom Extension,
page 4-13.
9. Extend boom approximately 1.22 m to 1.52 m (4 ft to
5 ft). Lower boom until sheave is on ground.
10. Block under insert approximately 2.4 m to 3.0 m (8 ft to
10 ft) forward of boom nose.
11. Remove retainer clips from four pins in the attachment
and anchor fittings. Remove attachment pins and stow
in holders on insert.
12. Retract boom, disengaging attachment fittings on boom
nose from anchor fittings on insert.
13. Attach a hook to the hoist cable.
14. Attach hoist cable hook to lifting lugs on insert. Lift
assembly and reposition blocking approximately 2.4 m
to 3 m (8 ft to 10 ft) forward of insert to boom extension
attachment points.
15. While supporting insert with hoist cable, remove retainer
clips from four pins attaching insert to boom extension.
Remove four pins.
16. Remove insert and position to one side of crane.
17. Position boom and extend to engage boom nose with
boom extension. Install four attachment pins and
retainer clips removed in step 15.
18. If required, stow the boom extension by performing
procedures 8 through 33 under Stowing Boom
Extension, page 4-13.
CONNECTING AND DISCONNECTING
BOOM EXTENSION
Connecting
Making Electrical Connection Between Boom
Extension Base Section and Boom Nose
1. Remove bypass plug from boom nose splitter
connection and stow on cap near splitter connection.
2. Unwind cable from boom extension base section and
connect to boom nose splitter connection.
Making Electrical Connection Between Boom
Extension Base Section and Boom Extension Fly
Section
1. Disconnect cable from boom extension base section
anti-two block switch.
2. Connect boom extension base section cable to boom
extension fly section cable.
3. Install cap onto anti-two block switch on boom extension
base section.
Disconnecting
Disconnecting Electrical Connection Between Boom
Extension Base Section and Boom Nose
1. Disconnect boom extension base section cable from
boom nose splitter connection.
2. Install cap on cable and wind cable onto boom extension
base section for storage.
3. Remove bypass plug from cap near splitter connection
and install in splitter connection.
Disconnecting Electrical Connection Between Boom
Extension Base Section and Boom Extension Fly
Section
1. Remove cap from anti-two block switch on boom
extension base section.
2. Disconnect boom extension base section cable from
boom extension fly section cable.
3. Install cap onto plug of boom extension fly section cable.
4. Connect boom extension base section cable to anti-two
block on boom extension base section.
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