Manitowoc Grove GRT880, Operator'S Manual

Page: 156 / 202

SET-UP AND INSTALLATION GRT880 OPERATOR MANUAL
4-14
Published 3-25-2020, Control # 643-04
cable. Reinstall cable retaining pins and secure with
clip pins.
8. Stow mast assembly:
a. Remove pin from the upright position lug of the mast
assembly.
b. Lower the mast assembly and install the pin in the
stowed position lug.
c. Secure with clip pin.
9. Disconnect the anti-two block cable(s). Refer to
Connecting and Disconnecting Boom Extension,
page 4-21
.
10. If erected, stow boom extension fly section as follows:
a. Attach rope to the boom extension fly section tip.
b. Raise the boom to horizontal.
c. Remove left attachment pin connecting the boom
extension fly section to the boom extension base
section. Stow attachment pin in the stowage holder
on the boom extension base section and secure
with retaining clip.
d. Slightly raise or lower boom to help control the
boom extension fly section swing. Using rope
attached to tip of boom extension fly section, swing
boom extension fly section to side of the boom
extension base section.
e. Connect locking bar (9, Figure 4-20; 1, Figure 4-16)
to boom extension base section attachment bar (2)
using pin (3). Secure with retaining clip.
11. Lower boom to minimum elevation and remove rope.
12. Attach rope to boom extension base section tip.
13. Raise boom to horizontal.
14. Extend boom approximately 12 in so boom extension
base section stowage lugs will line up in front of the
middle stowage bracket guide ramp (10, Figure 4-20)
and stowage pins (14, Figure 4-20) on the front stowage
bracket assembly (5, Figure 4-20) when the boom
extension is positioned to the side of the boom base.
15. Using the jack handle (4, Figure 4-17) stored on the left
side of the boom nose, extend boom extension
alignment jack (3, Figure 4-17) until the lower left
attachment pin is free from the anchor and attachment
fittings of the boom extension base section and boom
nose. Remove attachment pin and stow on boom
extension base section.
16. Secure with retaining clip.
17. Retract alignment jack to its original position, then return
the jack handle to its stowed position.
18. Remove top left attachment pin from the anchor and
attachment fittings of the boom extension base section
and boom nose. Stow attachment pin in boom extension
base section.
19. Secure with retaining clip.
DANGER
When stowing the boom extension fly section, ensure all
personnel and equipment are kept clear of the swing path.
Uncontrolled movement of boom extension fly section can
cause death, injuries, or damage to equipment.
6642-24
FIGURE 4-16
1
3
2
FIGURE 4-17
8177-2
1
2
3
Item Description
1 Boom Extension
2 Boom Nose
3 Alignment Jack
4 Alignment Jack Handle
4