Hammer HB 450, Руководство пользователя

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OPERATION
5.5 MOVEMENT
The transportation and parking positions are shown below. When movingwith the hammer, ensure that
it isn’t too close and doesn’t point at the cabinwindow.
5.6 SPECIAL CONDITIONS OF USE
If hammer is to be used in conditions that differ from normal breaking ordemolition work conditions,
such as:
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Hammer tunnelling
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Foundry cleaning
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Underwater operations
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Operations in extremely low or high temperatures
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Use of special hydraulic fluids
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Hammer operations with special carrier (extra long boom etc.)
■
Other special conditionsThat may require modifications to attachment, special operating
techniques,increased maintenance or special wear items.In case of special conditions of use, please consult
your local dealer for instructions.
The hammer as a standard assembly, must not be used under water. Ifwater fills the space where
the piston strikes the tool, a strong pres-sure wave is generated and the hammer may be damaged.
5.6.1 UNDERWATER OPERATION
The latest hammer models can be modified for underwater operations foronly short periods. The
operating principle in underwater hammering is toconduct pressurized air through a builtin channel to the
spaces above andbelow the piston. The air pressure prevents water entering the hammer. Thehammer as a
standard assembly, must not be used under water. If water fillsthe space where the piston strikes the tool,
a strong pressure wave is generated and the hammer may be damaged.
The wear resistance of the hammer parts is considerably lower under waterthan in normal use. This is
caused by corrosion and by the abrasive effectof mud in water. After starting underwater hammering, the
hammer must beinspected regularly, for example after every half hour operation. Adapt theinspection
intervals to the working conditions. See “Maintenance intervals inunderwater use”.