Bosch Rexroth M SED 6 VE1 Series, Manual

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M-.SED 6...VE1... | RA 22049-VE1-B2 16 /20 Bosch Rexroth AG | Hydraulics
9 Troubleshooting
The valve is not sensitive to faults as long as the specified
application conditions are complied with, in particular the
oil quality.
Error Possible cause(s) Remedy
Valve does not
switch
Electrical connection interrupted, no cur-
rent continuity
•
Cable break Replace the connection cable
•
Electrical defect in the solenoid coil Remove valve and have it repaired
•
No pressure at P Check and/or reapply pressure at port P
•
Control spool is jammed due to
contamination
If possible, try to release the control spool by manu-
ally actuating the manual override.
See "8.1 Operating the optional manual override".
If this is not successful: Remove the valve and
replace it with a new one. Have the valve repaired.
External leakage Seal defective
•
Seal at the connection surface is
defective
Remove the valve and replace the seals
•
Other leakage Remove the valve and replace it with a new one
Following faults due to contamination, it is - in addition to
the repair - essential to check the oil quality and improve it,
if necessary, by suitable measures such as flushing or the
additional installation of filters.
10 Inspection and maintenance
The following inspection, testing and maintenance works are
to be carried out regularly. Also considering the operating
conditions, the corresponding intervals are to be chosen so
that defects that can reasonably be expected are dealt with
in good time. The check must, however, at least be carried
out every three years from the date of manufacture of
the valve. The date of manufacture of the valve can be seen
from the name plate, see "5.1 Information on the name plate
and the valve solenoid".
IMPORTANT
The check is also to be carried out if the valve is only stored,
however not used!
For ordering details for seal kits, please refer to
"11.3 Avail-
able spare parts".
1. De-energize the connection line.
2. Remove coarse dirt from the exterior.
CAUTION
In order to avoid electrostatic charging, only
clean the valve solenoid and the connection using
a damp cloth.
3. Check all external fittings for completeness and
tight seat.
4. Check that the adapter, blind plug, external grounding
connection, nut on pole tube and connection line are
firmly seated.
5. Check valve for external leakage, replace the seals if
necessary, see "11.2 Repairing external leakages".
6. Open the terminal box and replace damaged seals,
if necessary.
7. Check the inside of the terminal box for corrosion. Cor-
rosion is an indication of leaks. Remove the valve and
have it repaired if there is any visible corrosion.
8. Check the potting compound and internal lines and litz
wires of the valve solenoid for visible damage. Remove the
valve and have it repaired if there is any visible damage.
9. Check all screws and connections for a tight seat.
10. Check all connection lines for damage. Replace the con-
nection line if there is any visible damage.
11. Replace the respective sealing elements every time the
adapter or the blind plug were removed. The sealing ele-
ments are only intended for single use.
12. Re-mount the cover of the terminal box with the seal
beneath it. Tighten the mounting screws with their spring
washers diagonally, one after the other.
Tightening torque of the cover screws: 1...1.1 Nm.