Manitowoc National Crane NBT40-1 Series User Manual

4-22 3-29-2018 Control # 610-00
OPERATING CONTROLS - CRANE NBT40-1 SERIES OPERATOR MANUAL
boom extension, and fully retracted outrigger beams for main
boom only.
Prior to any fully retracted outrigger (0% extended)
operation, extend jack cylinders with outriggers fully
retracted and level crane. Engage swing brake and raise
boom out of boom rest until the minimum boom angle for
indicated boom length without load is exceeded. DO NOT
release swing brake with boom below minimum indicated
boom angle.
This condition is applicable when load chart does not provide
a maximum boom length at 0 degree boom angle in a no
load situation. This is designated by "N/A".
The load chart contains crane lifting capacities in all
allowable lifting configurations and must be thoroughly
understood by the operator.
The left column is the load radius, which is the distance from
axis of crane rotation to load center of gravity. The top row
lists various boom lengths from fully retracted to fully
extended (with swingaway boom extension). The number at
the intersection of the left column and top row is the total load
limit for that load radius and boom length. The number in
parentheses below the total load limit is required boom angle
(in degrees) for that load.
Another important section is the range diagram. The range
diagram shows operating radius and tip height that can be
achieved at a given boom length and angle. If the operator
knows radius and tip height required for a specific lift, the
angle and boom length can quickly be determined from the
range diagram. Or, if an operator knows boom length and
angle, they can quickly determine tip height and operating
radius.
DANGER
Tipping Hazard!
Serious injury or death could result from improper crane
on fully retracted outriggers.
In fully retracted outrigger configuration, before slewing:
Ensure outriggers are properly set and crane is level per
operator manual.
Set swing brake to the locked position.
Raise boom to exceed minimum boom angle for given
boom length at no load indicated on load chart.
DO NOT release swing brake with boom below minimum
indicated boom angle
.
!
FIGURE 4-18
OPERATING RADIUS
HORIZONTAL
BOOM ANGLE
M
A
I
N
B
O
O
M
L
E
N
G
T
H
AXIS OF ROTATION
4605
TERMS TO KNOW
Illustration is Typical
for Viewing Only

Manitowoc National Crane NBT40-1 Series Specifications

General

Brand	Manitowoc
Model	National Crane NBT40-1 Series
Category	Construction Equipment
Language	English