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Troubleshooting
Bosch Rexroth AG, DB(W)...5X/...E, RE25802-B/09.19
Fault
Possible cause
External leakage
The seals at the connection
(leakage at the
surface(s) between pilot
directional valve or at
control valve and directional
the switching shock
valve, between directional valve
damping plate)
and switching shock damping
plate or between switching
shock damping plate and pilot
control valve are defective.
Name plate is
missing or cannot be
completely read.
Setting certificate of
the testing authority
is missing.
Other leakage at the
Directional valve /switching
directional valve or at
shock damping valve defective
the switching shock
damping valve
Rotary handle is
Transport damage, improper
destroyed
handling
Valve does not switch
Electr. connection interrupted,
in case of electric
no current continuity
control
Directional valve spool is
jammed due to contamination
Following faults due to contamination, it is moreover essential to check the quality
of the hydraulic fluid and to improve it, if necessary, by suitable measures such as
flushing or the additional installation of filters.
Remedy
Disassemble the directional valve,
switching shock damping plate; check
the seal ring recesses on the valve
connection surface for cleanliness and
damage. Assemble the new seals, see
table 17.
Replace the safety valve.
Request the setting certificate from the
Bosch Rexroth Quality Assurance, see
chapter 14.2 "List of addresses".
Send valve to the authorized facility
for repair. Please contact your regional
Bosch Rexroth representative.
Send valve to the authorized facility
for repair. Please contact your regional
Bosch Rexroth representative.
Cable break:
Replace the connection cable
Electrical defect in the coil:
Remove directional valve and have it
repaired.
If possible, try to release the
directional valve spool by manually
actuating the manual override. See
also 9.4 "Operating the optional manual
override at the directional valve"
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