Manitowoc GROVE RT890E Operator's Manual page 103

RT890E
ASSEMBLY OF BOOM EXTENSIONS
NOTE: The lengths of 72 ft (22.0 m) and 89 ft (27.1 m)
respectively equal the distance between the center
of the locking pin (on the main boom head) and the
front edge of the head sheave.
The designation 33 ft (10.1 m) section, 23 ft (7 m)
section, and 16 ft (4.9 m) section have been
adjusted to these lengths.The total length of the
individual sections is greater or smaller.
SET-UP AND INSTALLATION
CHECKLISTS FOR RIGGING WORK
Rigging the 72/89 Ft (22.0/27.1 m) Boom
Extension
Prerequisites
- The crane is on outriggers or the main boom is
placed on the boom support.
- An auxiliary crane is available.
1. Prepare the crane for unrigging.
2. If the lattice extension is folded up at the side of the main
boom, remove the lattice extension.
FIGURE 4-11
4-41
4