Manitowoc Grove GRT8120, Operator'S Manual

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SAFETY INFORMATION GRT8120 OPERATOR MANUAL
2-26
Published 3-22-2021, Control # 702-02
Only as a last resort should an operator attempt to leave the
crane upon contacting a power source. If it is absolutely
necessary to leave the operator’s station,
jump completely
clear of the crane. Do not step off. Hop away with both feet
together. Do not walk or run.
Following any contact with an energized electrical source,
the Grove distributor must be immediately advised of the
incident and consulted on necessary inspections and
repairs. Thoroughly inspect the hoist rope and all points of
contact on the crane. Should the distributor not be
immediately available, contact Manitowoc Crane Care. The
crane must not be returned to service until it is thoroughly
inspected for any evidence of damage and all damaged parts
are repaired or replaced as authorized by your Grove
distributor or Manitowoc Crane Care.
Special Operating Conditions and
Equipment
Never operate the crane during an electrical thunderstorm.
When operating near transmitter/communication towers
where an electrical charge can be induced into the crane
or load:
• The transmitter shall be deenergized OR,
• Tests shall be made to determine if an electrical charge
will be induced into the crane or load.
• The crane must be provided an electrical ground.
• If taglines are used, they must be non-conductive.
• Every precaution must be taken to dissipate induced
voltages. Consult a qualified RF (radio frequency)
Consultant. Also refer to local, state, and federal codes
and regulations.
When operating cranes equipped with electromagnets, you
must take additional precautions. Permit no one to touch the
magnet or load. Alert personnel by sounding a warning
signal when moving a load. Do not allow the cover of the
electromagnet power supply to be open during operation or
at any time the electrical system is activated. Shut down the
crane completely and open the magnet controls switch prior
to connecting or disconnecting magnet leads. Use only a
non-conductive device when positioning a load. Lower the
magnet to the stowing area and shut off power before
leaving the operator’s cab (if equipped) or operator’s station.
Grounding the Crane
The crane may become charged with static electricity. This
may occur especially when using outrigger pads made of
plastic or when the outrigger pads are cribbed with insulating
material (e.g., wooden planks).
Use electrically conducting material for grounding.
1. Hammer a metal rod (3, Figure 2-6) (length of
approximately 2.0 m (6.6 ft)) at least 1.5 m (5 ft) into the
ground.
2. Moisten the soil around the metal rod (3) for better
conductivity.
3. Clamp an insulated cable (2) to the metal rod (3), cross-
section of at least 16 mm² (0.025 in²) (AWG 5).
4. Connect the free end of the cable with a clamp (1) to a
good electrically conductive location on the frame.
WARNING
Risk of accidents due to electric shock!
Ground the crane before you start to work with it
• Near strong transmitters (radio transmitters, radio
stations, etc.)
• Near high-frequency switching stations
• If a thunder storm is forecast
WARNING
Risk of accidents due to electric shock!
Make sure that the connections between the cable and
the clamp are electrically conductive.
Do not attach the clamp to parts that are screwed on, such
as valves, covers or similar parts.
FIGURE 2-6