Bosch Rexroth 4WS2EM 10 Series Operating Instructions Manual page 43

Fault table The valve is not sensitive to faults as long as the specified application conditions are
complied with, in particular the oil quality and the operating temperature.
Table 17: Fault table
Error
Valve does not react
to control
Zero flow too high
Bad dynamic
behavior
Instable zero point
Hysteresis
Large zero point
deviation
External leakage
Following faults due to contamination, in addition to the repair, it is essential
to check the oil quality and improve it, if necessary, by suitable measures such as
flushing or the additional installation of filters.
15 Technical data
For the technical data of your valve please refer to "Data sheet 29583-XL".
Possible cause(s)
Electrical connection
interrupted,
no current continuity
• Cable break
• Mating connector not
connected
• Connector without contact
• Valve-internal cable break
No pilot oil pressure available
• No pressure at P
• Filter blocked
• Orifice blocked
• Control edges worn
• Filter contaminated
• Orifice contaminated
• Control spool friction due to
contamination
• Control spool friction due to
contamination
• Orifice contaminated
Seal defective
• Seal at the connection
surface is defective
• Seal at filter screw is
defective
• Other leakage
RE29583-XL-B/09.20, 4WS2EM 10...XL..., Bosch Rexroth AG
Technical data
Remedy
Replace the connection cable
Connect the mating connector
Remove valve and have it repaired
Remove valve and have it repaired
Ensure the pilot oil supply
Exchange filter element and check system
for contamination
Remove valve and have it repaired
Remove valve and have it repaired
Exchange filter element and check system
for contamination
Remove valve and have it repaired
Remove valve and have it repaired
Remove valve and have it repaired
Remove valve and have it repaired
Remove the valve and replace the seals
Disassemble the filter screw and replace
the seal
Remove valve and replace it with
a new one
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