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Maintenance and repair
Bosch Rexroth AG
, 4WRZ..7X/...XE..., RE 29115-XE-B/09.19
Before the initial commissioning or re-commissioning of the valve in a system,
check whether the valve requires maintenance. If required, carry out
maintenance.
For order details for seal kits, please refer to chapter 10.6 “Spare parts”.
In order to ensure a long life cycle and functionality, include the following activities
in your maintenance schedule for the overall system:
1.
De-energize and depressurize the relevant system part.
2.
Remove coarse dirt from the exterior.
CAUTION!
Damage to property and personal injury caused by electrostatic charging!
▶
In order to avoid electrostatic charging, clean the valve using a damp cloth only.
3.
Check all external fittings for completeness and tight seat.
4.
Check cable and line entry, plug screw, external grounding connection and
connection line for tight seat.
5.
Check the valve for external leakage and replace the sealing devices, if required,
see chapter 10.5 “Rectifying external leakages”.
6.
Open the terminal box and replace any damaged seals.
7.
Check the inside of the terminal box for corrosion. Corrosion is an indication
of leakage. In case of visible corrosion, remove the valve and have it repaired.
8.
Check the potting compound and internal lines and braided wires of the valve
solenoid for visible damage. In case of visible damage, remove the valve and have
it repaired.
9.
Check all screws and connections for tight seat.
10.
Check all connection lines for damage. Replace the connection line if there is any
visible damage.
11.
Replace all associated sealing elements with new ones each time the cable or line
entry is released. The sealing elements are only intended for single use.
12.
Re-assemble the cover of the terminal box with the seal beneath it. Tighten
the mounting screws with the spring washers diagonally, one after the other.
Tightening torque of the cover screws: 1...1.1 Nm.
