SET-UP
OPERATOR MANUAL
NBT60XL
4-14
Published 11-01-2020 Control # 710-00
Anti-Two-Block Weight Installation
To prevent the hoist rope from slipping out of the A2B weight,
rig the weight as shown in Figure 4-10.
NOTE:
The nuts, clamp and A2B bracket must be removed
from the hoist rope in order to reeve the hoist rope
through the hook block and boom nose sheaves
when reeving for multi-part lines as shown in
Figure 4-10. Install the clamp and nuts to the rope
before performing a lift.
MULTI-PART LINE REEVING
Multi-part line reeving enables greater loads to be lifted than
can be lifted with single part line. However, loads are limited
by the stability and structural integrity of the crane. The load
must be within the limits contained in the load chart.
NOTE:
The A2B bracket is for single part line use only.
Remove the A2B bracket shown in Figure 4-10
from the hoist rope when changing from a single
part line to a multiple part line to allow the hoist
rope and wedge socket to reeve through the
sheaves on the boom nose and the hook block.
Install the clamp and nuts to the rope before
performing a lift.
Using Multiple Part Lines
The hoist data chart provides information for pull limitations
on the hoist with various multi-part reevings. These ratings
are based on providing the proper operating safety factor for
the rope supplied with the machine. Therefore, any
replacement rope must meet the rope specification in this
manual.
Possible Multi-Part Line Reeving
Combinations
The NBT60XL cranes support reevings of up to 11 line parts,
depending on the hook block and auxiliary sheave case
used. Possible components used for reeving include:
•
Anti-Two Block. For more information, see
•
Wedge Socket. For more information, see
•
Downhaul Weight—Used for 1-part reeving
•
1-Sheave Hook Block—Used for 2- and 3-part reevings
•
3-Sheave Hook Block—Used for 4- to 7-part reevings
•
5-Sheave Hook Block—Used for 8- to 11-part reevings
The cranes also feature optional 1- and 2-sheave auxiliary
sheave cases. The 1-sheave auxiliary sheave case can be
used for 4- to 8-part reevings. The 2-sheave auxiliary sheave
case is required for 9- to 11-part reevings.
Table 4-1 shows the different possible reeving combinations
with no auxiliary sheave case and 2-sheave auxiliary sheave
case.
The reeving configuration is entered during RCL setup. For
more information, see
FIGURE 4-10
The anti-two-block chain
must be installed
between the slot in the
weight and the hoist
rope.
Anti-two Block
Weight
Hoist
Cable
Slot
Chain Length 40 cm
(16 inches) Do not
shorten the chain.
Upper Link
Lower Link
The nuts, clamp and A2b
bracket must be removed
from the hoist rope when
reeving for multi-part line
8835
Fo
r
Содержание NBT60XL
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