Inspection And Maintenance; Repair - Bosch Rexroth 4WRPD Operating Instructions Manual

40/48 Maintenance and repair
Bosch Rexroth AG, 4WRPD(H), 4WRPQ(H), 4WRPF(H), 4WRLD, 4WRLF, 4WRLQ, 5WRPF10, 5WRPQ10; RE 29391-B/05.2021

10.2 Inspection and maintenance

Dirt and foreign particles in the valve!
Penetrating dirt and foreign particles in the valve lead to wear and malfunctions.
Safe functioning of the valve is therefore no longer ensured.
▶ During installation, ensure utmost cleanliness in order to prevent foreign
particles such as welding beads or metal chips from getting into the hydraulic
lines.
▶ Do not use linty cloth for cleaning.
▶ Ensure that no cleaning agents mix with the hydraulic fluid.
▶ Flush the hydraulic system if necessary. Replace the fluid filter or the hydraulic
fluid.

10.3 Repair

The valve on Multi-Ethernet basis may only be replaced as complete unit. For
safety reasons, unauthorized modification of the valve is not allowed! Repairs may
only be carried out by Bosch Rexroth AG. For repair and maintenance work, send
the device to the service address specified in chapter 16.1.
Devices returned to Bosch Rexroth for repair have to be shipped in the original
packaging, if possible.
Repaired devices are returned with default settings.
User-specific settings are not maintained. The operator has to transmit the relevant
user parameters and programs again.
Correcting leakage at the mounting surface
▶ Dismount the valve, see chapter 11 "Demounting and replacement".
▶ Check the seal ring recesses on the connection surface for cleanliness and
intactness.
▶ Dry the component connection surface and the component contact surface
using suitable cleaning materials.
▶ Install new seals.
▶ Remount the valve at the contact surface, see chapter 7 "Installation".
WARNING