Manitowoc GROVE RT890E Operator's Manual page 92

SET-UP AND INSTALLATION
- Swing the lattice extension until it is no longer above
the run-up rail.
- Carefully lower the lattice extension from the control
unit on the foot of the 33 ft (10.1 m) section until it
starts to swing out.
If a helper is holding the guide rope, he can now swing the
lattice extension in front of the main boom head.
If you are alone and when securing you fixed the guide rope
to the crane, the lattice extension turns only so far until the
guide rope is taught. You can now turn the lattice extension
with the guide rope in front of the main boom head.
Proceed in the opposite order for unrigging.
Swing the 23 ft (7 m) section in front of the 33 ft (10.1
m) section
Prerequisites
- The 33 ft (10.1 m) section is locked in front of the
main boom head.
- The lattice extension is secured on the head of the
23 ft (7 m) section with a guide rope.
- Move the connection on the 33 ft (10.1 m) section
middle area.
- Turn the 23 ft (7 m) section using the guide rope in
front of the 33 ft (10.1 m) section.
Proceed in the opposite order for unrigging.
Electrical Connections on the Lattice
Extension
The lifting limit switch and the lowering limit switch are
connected via the electrical connection on the lattice
extension.
33 ft (10.1 m) Swingaway Lattice Extension
For the 33 ft (10.1 m) swingaway lattice extension the
electrical connection is made or disconnected on the left side
of the main boom head.
Establishing the electrical connection
• Remove the short-circuit plug from the socket on the
main boom and plug it in the dummy socket.
• Unwind the cable from the roll.
• Remove the plug from the dummy socket and insert it in
the socket on the main boom head.
Disconnecting electrical connection
• Remove the plug from the socket on the main boom
head and insert it in the dummy socket on the 33 ft (10.1
m) section.
4-30
• Remove the short-circuit plug from the dummy socket
and plug it in the socket on the main boom.
• Wind the cable onto the take-up reel.
• Check if the dummy plug (2) is inserted in the socket (1)
at the front of the 33 ft (10.1 m) section.
56 ft (17.1 m) Two-Stage Swingaway Lattice Extension
For the 56 ft (17.1 m) swingaway lattice extension an
additional connection is made or disconnected between the
33 ft (10.1 m) section and the 23 ft (7 m) section as well as
the electrical connection of the 33 ft (10.1 m) swingaway
lattice extension.
• First make the electrical connection for the 33 ft (10.1 m)
swingaway lattice extension.
Establishing the Electrical Connection
• Remove the plug (3) from the dummy socket (1) on the
23 ft (7 m) section.
• Unwind the cable from the roll (5).
RT890E