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Inspection of the pre-filling
pressure
10.1 Maintenance
10.1.1 Required tests/maintenance activities
In order to guarantee a fault-free operation and a long life cycle, however,
the following tasks are to be carried out:
• Inspection of the pre-filling pressure
• Inspection of the safety equipment, fittings
• Inspection of the line connections
• Inspection of accumulator fixation
During maintenance work for which the accumulator has to be removed, the
diaphragm type accumulator or the system must be depressurized on the oil side.
For disassembly, assembly and commissioning, proceed as described in the
corresponding chapters.
Make sure that no line connections, ports and components are disconnected as
long as the system is under pressure and voltage or the diaphragm type
accumulator is still under hydraulic pressure. Secure the system against
restarting.
To check the gas filling pressure of the diaphragm type accumulator, proceed as
follows:
▶
Make sure that the system is depressurized.
▶
For the specified gas filling pressure p
DANGER! Uncontrolled release of a significant amount of gas!
Danger to life! Risk of suffocation!
▶
Make sure that the workplace is sufficiently ventilated.
▶
For checking the gas filling pressure, always use the suitable charging and
test device (for diaphragm type accumulator with material number 0538103012 or
for bladder and diaphragm type accumulator with material number 0538103014).
▶
Remove the cover cap from the gas side of the diaphragm type accumulator.
▶
Screw the charging and test device for pressure accumulators on the gas valve of
the diaphragm type accumulator. When doing this, always observe the operating
instructions of the charging and test device.
▶
The prescribed pre-filling pressure is indicated in the hydraulic circuit diagram.
▶
Continue loosening the gas filling screw at the diaphragm type accumulator until
the pre-filling pressure is indicated on the pressure gauge.
▶
Check whether the pre-filling pressure indicated on the pressure gauge of the
charging and test device corresponds to the value indicated in the hydraulic
circuit diagram. If the two values differ, set the pre-filling pressure as described in
chapter 8.2.
▶
Tighten the gas filling screw on the diaphragm type accumulator again.
▶
Remove the charging and test device from the gas port of the diaphragm type
accumulator.
The pre-filling pressure is now checked and set.
, refer to the circuit diagram of the system.
0
Type HAD...-1X/ and HAD...-2X/, RE 50150-B/10.20, Bosch Rexroth AG
Maintenance and repair
33/44
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