SAFETY INFORMATION 2250 OPERATOR MANUAL
2-10
Published 06-24-16, Control # 241-01
7. Disengage the master clutch, if equipped.
8. Stop the engine.
NOTE: For more information, see Stopping Engine/
Leaving Crane Unattended on page 3-42 in
Section 3.
Power Failure
The operator shall perform the following operations if power
or a control function fails during operation.
1. Land all suspended loads, if possible, under brake or
power control.
2. Apply all brakes and locking devices.
3. Place all controls to the OFF position.
Operating at Night or in Bad Weather
• If the crane will be operated at night, the operator shall
make sure that there is sufficient lighting for safe
operation. The load and landing area must be
illuminated.
• The operator shall not operate the crane during periods
of bad weather if the ability to see the load or signal
person is impaired by darkness, fog, rain, or snow.
Do not operate the crane with a snow- or ice-covered
boom. The extra weight may cause overload, tipping, or
structural damage.
NOTE: Never operate the crane during an electrical
thunderstorm.
When a local weather storm warning exists
(including electrical thunderstorm), stop operation
and secure the crane.
DO NOT depend on grounding. Grounding of a
crane affords little or no protection from electrical
hazards. The effectiveness of grounding is limited
by the size of the conductor (wire) used, the
condition of the ground, the magnitude of voltage
and current present, and numerous other factors.
• Wind can cause the crane to tip or the boom and other
attachments to collapse. The operator or qualified
person directing the lift shall compensate for the effect of
wind on the load and boom by reducing ratings, reducing
operating speeds, or both.
Unless otherwise specified in the Capacity Chart or
Operator Manual, stop operation under the following
wind conditions:
- If the wind causes the load to swing forward past the
allowable operating radius or sideways past either
boom hinge pin, land the load and apply the drum
brakes.
- If the wind exceeds 35 mph, land all loads and apply
the drum brakes, lower the boom onto blocking at
ground level or otherwise restrain it, and apply the
swing and travel brakes and/or locks.
NOTE: “Land the load” means to set the load down on a
firm, uniformly supporting surface.
• Booms, jibs, or masts that are being assembled or
disassembled on the ground (with or without the support
of boom rigging) must be securely blocked to prevent
the boom, jib, or mast sections from dropping.
• Each outrigger must be visible to the operator or the
signal person during extension and retraction.
Handling the Load
Size of Load
• The crane must not be loaded beyond the applicable
static or dynamic ratings given in the Capacity Chart for
the crane configuration.
NOTE: Capacity charts for Manitowoc Cranes show the
total weight of freely suspended loads for various
boom and jib lengths and operating radii.
A “Freely suspended load” is a load that is hanging
free with no direct external force applied except by
the crane’s load-line reeving.
To determine the actual weight of the load that can
be lifted at a given radius (working load), the
operator shall deduct the weight of certain lifting
equipment from the total weight given in the chart.
See the specific capacity chart for your crane for a
list of lifting equipment that must be deducted.
The operator’s judgment must be used to further
reduce the total load to allow for the dynamic
effects of swinging, hoisting, or lowering, and of
adverse weather conditions including wind.
• The operator or other designated person directing the lift
shall verify that the weight of the load is within the static
or dynamic rating for the radius at which the load will be
lifted.
NOTE: Verified weights and measured radii must take
priority over RCL/RCI readings.
WARNING
Overhead Hazard!
Workers shall not go under the boom, jib, or mast sections
when removing connecting pins or bolts.
To Next Page
Loading...
Need help?
General
