Manitowoc GROVE RT890E Operator's Manual page 78

SET-UP AND INSTALLATION
17. Lower the lattice extension so that it is positioned on the
run-up rail.
18. Establish the connection in the front area.
19. Remove right hand locking pin between the 33 ft (10.1
m) section and the main boom head.
20. Swing the lattice extension on the reap rail onto the main
boom.
21. Secure the connection in the front area.
NOTE: If the 23 ft (7 m) section has been removed,
proceed to step 23.
22. If the 23 ft (7 m) section has been removed, establish a
connection between the 33 ft (10.1 m) and the main
boom.
23. Remove electrical connection between the lattice
extension and the main boom.
24. Disconnect the hydraulic connection between the lattice
extension and the main boom.
25. Check whether the lattice extension is in transport
condition.
26. Fold in the run-up rail.
4-16
27. If necessary, remove the hose drum connection for
hydraulic supply.
DESCRIPTION OF RIGGING WORK
Preparing the Crane for Rigging
NOTE: The data is this section also applies to the rigging
of the boom extension.
Requirements for rigging
Before you rig a lattice extension or the boom extension, the
following requirements must be met:
- The swingaway lattice extension is mounted on the
side of the main boom and is in transport condition.
- The counterweight version required according to the
lifting capacity table for the planned operation with
the lattice extension is rigged.
- The crane is supported by the outrigger span
required according to the lifting capacity table for the
planned operation with the lattice extension and is
aligned horizontally.
- The main boom is completely retracted and has
been lowered into horizontal position.
- If the crane is equipped with two hoists with
additional equipment, the hook block is unreeved on
the hoist, which is not used for working with the
lattice extension.
Requirements for unrigging
Before you lower a lattice extension or the boom extension
into a horizontal position, the following requirements must be
met:
- No other load is raised apart from the hook block.
- The counterweight version required according to the
lifting capacity table for the planned operation with
the lattice extension is rigged.
- The crane is supported with the outrigger span
prescribed for operation with the rigged lattice
extension according to the lifting capacity table.
- The main boom is fully retracted.
Securing lattice extension with cord
If the crane is not well aligned, the lattice extension may
swing out of its own accord when you remove the last
connection that held the lattice extension at the side of the
main boom.
RT890E