Manitowoc National Crane NBT30H-2 User Manual

SET-UP NBT30H-2 OPERATOR MANUAL
4-10
Published 03-18-2019 Control # 582-04
HOIST CABLE INSTALLATION
To install wire rope, use the following procedure:
1. Unwind the cable from the storage reel and route the
cable through the boom cable guides to the hoist from in
front of the boom.
.
2. Install the end of the cable into the hoist using the wedge
socket provided(1) (Figure 4-5).
NOTE: The end of the cable should be even with the
bottom of the slot for the anchor wedge.
3. Position the anchor wedge in the drum slot; pull firmly on
the free end (2) of the cable to secure the wedge.
NOTE: If the wedge does not seat securely in the slot,
carefully tap (3) the top of the wedge with a mallet.
4. Slowly rotate the drum, ensuring the first layer of cable is
evenly wound onto the drum.
5. Install the remainder of the cable, as applicable.
6. Remove the cable keeper pin from the boom sheave
and lay the cable over the top sheave. Replace the
keeper pin.
7. Unspool the remainder of the cable. Make sure the cable
is straight and without kinks.
8. Attach the wedge socket to the free end of the cable as
shown in Figure 4-7. If you are using a terminator wedge
socket, see Figure 4-6.
9. Torque the clamp on the dead end of the cable to 95 ft-lb
(128 N·m).
NOTE: The torque must be rechecked after the initial
operation of the crane. Be sure the clamp is
attached to the dead end of the cable only.
10. Start winding the cable onto the hoist drum. Maintain
about 500 lb (250 kg) of tension on the cable.
11. Keep the cable wraps tight against each other when the
first half of the bare hoist is filling. The second half of the
hoist should wrap tightly because the fleet angle of the
cable tends to pull the cable to the center of the drum
thus wrapping tightly.
12. Continue winding the cable on the second, third and
fourth layer of the hoist. Keep the cable paying in
straight to the boom to avoid side loading the boom. The
preceding layers will wrap smoothly guided by the first
layer wrapping.
WEDGE SOCKETS
To install a wedge socket:
• Make sure the wedge socket is the proper size for the
cable.
• Do not mix components of different wedge socket
manufacturers.
• The wedge socket must meet the requirements of the
wedge socket and wire rope manufacturers.
State and local laws may vary and require different
attachment methods depending upon work conditions. The
user is responsible for alternate attachment methods.
Terminator Wedge Installation
The NBT30H-2-2 is shipped with a terminator wedge socket
which is National Crane’s preferred type of socket
(Figure 4-6). Other wedge socket configurations are shown
in Figure 4-7.
To attach a terminator wedge (Figure 4-6), use the following
procedure:
CAUTION
Equipment Damage Hazard!
If the cable is wound from a storage reel, rotate the reel in
the same direction as the hoist. Damage to the cable will
result if incorrectly installed.
7196
1
2
3
7312-4
FIGURE 4-5
8301
2

Manitowoc National Crane NBT30H-2 Specifications

General

Brand	Manitowoc
Model	National Crane NBT30H-2
Category	Construction Equipment
Language	English