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Disassembly and replacement
Bosch Rexroth AG
, Type HAD...-1X/ and HAD...-2X/, RE 50150-B/10.20
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For safety reasons, we recommend discharging the gas pressure and clearly
marking this on the accumulator, if the system is shut-down for a longer time or
forever.
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In order to keep the accumulator permanently depressurized, the gas filling screw
must be removed.
11.3 Disassembly process
Proceed as follows to disassemble the diaphragm type accumulator:
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Ensure that the hydraulic system is depressurized and the diaphragm type
accumulator is hydraulically unloaded.
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Remove the
cover cap
from the gas side of the diaphragm type accumulator.
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Screw the charging and test valve for pressure accumulators onto the gas port
of the diaphragm accumulator. When doing this, always observe the operating
instructions of the charging and test device.
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Discharge the pre-filling pressure on the gas side. When doing this,
always observe the operating instructions of the charging and test device.
WARNING!
Increased nitrogen concentration in the environment when draining the
gas!
Danger to life! Risk of suffocation!
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Make sure that the workplace is sufficiently ventilated.
CAUTION!
Low surface temperature when draining the gas!
Danger of frostbite!
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Only touch the surfaces of the diaphragm type accumulator with cold-resistant
protective clothing, e.g. gloves, or do not work at cold surfaces.
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Observe the protective measures of the system manufacturer.
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The pre-filling pressure depends on the temperature. During the discharging,
the diaphragm type accumulator cools down. Wait until the accumulator heats up
to ambient temperature again.
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Discharge the pre-filling pressure generated during the heating up on the gas
side. When doing this, always observe the operating instructions of the charging
and test device.
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Remove the charging and test valve for pressure accumulators from the gas port.
WARNING!
Uncontrolled loosening of the gas valve/gas valve assembly/diaphragm
type accumulator due to residual pressure!
Danger to life! Risk of injury!
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Ensure that the diaphragm type accumulator has been completely unloaded on
the gas side via the relieving nut in the thread of the gas valve (whistles during
opening).
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Standard screws must not be used instead of the gas valve (thread with
relieving nut).
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Loosen the holding device and remove the diaphragm type accumulator on the oil
side from the system in a suitable order depending on the structure.