SAFETY PRECAUTIONS - CRANE NBT40-1 SERIES OPERATOR MANUAL
2-4
3-29-2018 Control # 610-00
You must be mentally and physically fit to operate
equipment. Never attempt to operate equipment while under
the influence of medication, narcotics, or alcohol. Any type of
drug could impair physical, visual and mental reactions, and
capabilities.
As operator of this equipment, you are granted the authority
to stop and refuse to lift loads until safety is assured.
OPERATIONAL AIDS
Operational aids are accessories that provide information to
facilitate operation of equipment or that take control of
particular functions without action of the operator when a
limiting condition is sensed. Examples of such devices
include, but are not limited to, the following: anti-two-block
device, rated capacity indicator, rated capacity limiter, boom
angle or radius indicator, boom length indicator, equipment
level indicator, hoist drum rotation indicator, load indicator,
and wind speed indicator.
National Crane remains committed to providing reliable
products that enable users and operators to safely lift and
position loads. National Crane has been an industry leader in
the incorporation of operational aids into the design of its
equipment. Federal law requires that equipment be properly
maintained and kept in good working condition. The manuals
that National Crane provides that are specific for each
equipment and the manufacturer’s manuals for the
operational aids shall be followed. If an operational aid
should fail to work properly, the equipment user or owner
must assure that repair or recalibration is accomplished as
soon as is reasonably possible. If immediate repair or
recalibration of an operational aid is not possible and there
are exceptional circumstances which justify continued short-
term use of the equipment when operational aids are
inoperative or malfunctioning, the following requirements
shall apply for continued use or shutdown of the equipment:
• Steps shall be taken to schedule repairs and
recalibration immediately. The operational aids shall be
put back into service as soon as replacement parts, if
required, are available and the repairs and recalibration
can be carried out. Every reasonable effort must be
made to expedite repairs and recalibration.
• When a Load Indicator, Rated Capacity Indicator, or
Rated Capacity Limiter is inoperative or malfunctioning,
the designated person responsible for supervising the
lifting operations shall establish procedures for
determining load weights and shall ascertain that the
weight of the load does not exceed the equipment
ratings at the radius where the load is to be handled.
• When a Boom Angle or Radius Indicator is inoperative
or malfunctioning, the radius or boom angle shall be
determined by measurement.
• When an Anti-Two-Blocking Device, Two-Blocking
Damage Prevention Device or Two-Block Warning
Device is inoperative or malfunctioning, the designated
person responsible for supervising the lifting operations
shall establish procedures, such as assigning an
additional signal person to furnish equivalent protection.
This does not apply when lifting personnel in load-line
supported personnel platforms. Personnel shall not be
lifted when anti-two-block devices are not functioning
properly.
• When a Boom Length Indicator is inoperative or
malfunctioning, the designated person responsible for
supervising the lifting operations shall establish the
boom lengths at which the lift will be made by actual
measurements or marking on the boom.
• When a Level Indicator is inoperative or malfunctioning,
other means shall be used to level the equipment.
Rated Capacity Limiter (RCL) Systems (If
Equipped)
Your equipment may be equipped with an RCL system which
is intended to aid the operator. An RCL is a device that
automatically monitors radius, load weight, and load rating
and prevents movements of the equipment, which would
result in an overload condition.
Test daily for proper operation. Never interfere with the
proper functioning of operational aids or warning devices.
Under no condition should it be relied upon to replace the
use of Load Charts/Reach Diagram and operating
instructions. Sole reliance upon these electronic aids in
place of good operating practices can cause an accident.
Know the weight of all loads and always check the capacity
of the equipment as shown on the Load Chart/Reach
Diagram before making any lifts.
NEVER exceed the rated capacity shown on the Load Chart/
Reach Diagram. Always check the Load Chart/Reach
Diagram to ensure the load to be lifted at the desired radius
is within the rated capacity of the equipment.
For detailed information concerning the operation and
maintenance of the RCL system installed on the equipment,
see the RCL manufacturer’s manual supplied with the
equipment. Manufacturers of rated capacity limiters may
refer to them in their manuals as a load moment indicator
(LMI), a hydraulic capacity alert system (HCAS), a safe load
indicator (SLI); National Crane refers to these systems as a
rated capacity limiter (RCL) throughout its Operator and
Service Manuals.)
Anti-Two-Blocking Device
This equipment should have a functional Anti-Two-Block and
Control Lock-Out System. Test daily for proper operation.
Two-blocking occurs when the load block (hook block,
headache ball, rigging, etc.) comes into physical contact with
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