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Bosch Rexroth AG
Fault finding and troubleshooting
Table 6:
Fault table for the HAB..-4X bladder-type accumulator
Fault
Gas pressure changes during
operation
Cracks on the vessel
Internal corrosion
Abrasion and reduction of wall
thickness
Oil leakage at interfaces to the
outside
Impossible to assemble
Commissioning after expiration of
shelf life not possible
14.2
Fault table
Possible cause
Leakage / gas valve leaks
Gas valve broken/damaged
Gas valve function impaired due to
contamination
System-related change of pressure in
dependence upon the temperature
Reduction due to permeation
Application out of specification
Operation outside the prescribed
temperature range
Use of inappropriate fluids
Residual humidity in the vessel due to
inappropriate storage conditions
Use of inappropriate fluids
Improper servicing
O-ring of the sealing is damaged or
hardened due to too high an oil temperature
Oil valve cracked due to non-tension-free
assembly of the bladder-type accumulator
Improper environmental force effect.
Damaging of the oil valve during transport
Improper force effects due to mobile
applications.
Wrong thread
Thread damaged
Corrosion protection not sufficient
Type HAB..-4X | RE 50170-B/10.08
Remedy
Visual examination;
leak test with leak spray during final assembly
Request a replacement gas valve and cap from the
Bosch Rexroth Service group.
Always use the charging and test device according
to RE 50170 for the charging and discharging of the
bladder-type accumulator.
Charge the Bosch Rexroth service with the
replacement of the gas valve with valve cap.
Temperature-dependant changes of the gas charge
pressure cannot be avoided.
The gas charge pressure must be chosen in
accordance with the operating temperatures expected.
Refill gas
Immediately decommission the system.
Replace the accumulator. The accumulator must not
be put into operation again, see chapter 12 "Disposal".
Immediately decommission the system.
Replace the accumulator. The accumulator must not
be put into operation again, see chapter 12 "Disposal".
Check the operating temperature after commissioning.
Immediately decommission the system.
Replace the accumulator. The accumulator must not
be put into operation again, see chapter 12 "Disposal".
Use an appropriate fluid.
Immediately decommission the system.
Replace the accumulator. The accumulator must not
be put into operation again, see chapter 12 "Disposal".
Observe the prescribed storage conditions.
Immediately decommission the system.
Replace the accumulator. The accumulator must not
be put into operation again, see chapter 12 "Disposal".
Use an appropriate fluid.
Ensure cleanliness.
Servicing must only be carried out by qualified
persons.
Request a replacement gas valve and cap from the
Bosch Rexroth Service group.
Check the oil temperature.
Replace the oil valve.
Contact Bosch Rexroth for consultation
Visual examination after transport.
Contact Bosch Rexroth for consultation
Replace the parts concerned.
Replace the bladder-type accumulator.
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