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Published 11-01-2020 Control # 710-00
SAFETY PRECAUTIONS
NBT60XL OPERATOR MANUAL
Carefully follow the procedures in this Operator Manual
when extending or retracting the outriggers. Death or serious
injury could result from improper equipment setup on
outriggers.
The operator must select the proper
Load Chart
and Rated
Capacity Limiter (RCL) System program for the outrigger
position selected.
Before swinging the superstructure over the side when the
outriggers are retracted, consult the Load Chart for any
boom angle or boom length restrictions.
Long cantilever booms can create a tipping condition when
in an extended and lowered position. Retract the boom
proportionally with reference to the capacity of the applicable
Load Chart
.
Check equipment stability before lifting loads. Make sure that
the outriggers (or tires if lifting on rubber) are firmly
positioned on solid surfaces. Make sure that the equipment
is level, brakes are set, and the load is properly rigged and
attached to the hook. Check the
Load Chart
against the
weight of the load. Lift the load slightly off the ground and
recheck the stability before proceeding with the lift.
Determine the weight of the load before you attempt the lift.
Outrigger beams and jack cylinders (plus single front
outrigger, if equipped) must be properly extended and set to
provide precise leveling of the equipment. Tires must be
clear of the ground before lifting on outriggers.
KEEP THE BOOM SHORT. Swinging loads with a long line
can create an unstable condition and possible structural
failure of the boom.
Load Charts
Load Charts
represent the absolute maximum allowable
loads, which are based on either tipping or structural
limitations of the equipment under specific conditions.
Knowing the precise load radius, boom length, and boom
angle should be a part of your routine planning and
operation. Actual loads, including necessary allowances,
should be kept below the capacity shown on the applicable
Load Chart
.
Load Chart
capacities are based on freely suspended loads.
You must use the appropriate
Load Chart
when determining
the capability of the equipment in the configuration required
to perform the lift.
Maximum lifting capacity is available at the shortest radius,
minimum boom length, and highest boom angle.
Do not remove the
Load Charts
from the equipment.
Work Site
Prior to any operation, you must inspect the
entire
work site,
including ground conditions, where the equipment will travel
and operate. Make sure that the surfaces will support a load
greater than the equipment’s weight and maximum capacity.
Be aware of all conditions that could adversely effect the
stability of the equipment.
WIND FORCES
There are basic principles that must be followed while
operating in windy conditions. This information has been
provided to assist in determining safe operation in windy
conditions.
Always use extreme caution when windy conditions exist.
NEVER exceed the rated capacity shown on the
Load Chart
.
Always check the
Load Chart
to make sure that the load
to be lifted is within the rated capacity of the equipment.
Wind can have a significant effect on loads that may be lifted
by equipment. Wind forces act differently on the equipment
depending upon the direction from which the wind is blowing
(e.g., wind on the rear of the boom can result in decreased
forward stability, wind on the underside of the boom can
result in decreased backward stability, wind on the side of the
boom can result in structural damages, etc.)
Wind forces can exert extreme dynamic loads. National
Crane recommends that a lift not be made if the wind can
cause a loss of control in handling the load.
Wind forces can be determined by typical visible effects on
the landscape.To assist you in determining prevailing wind
conditions, refer to Table 2-1.
9120
Example decal. For reference only.
Fo
r
Reference
Only
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