Repair; Rectifying External Leakages; Spare Parts - Bosch Rexroth H-4WEH XE Series Operating Instructions Manual

4/2 and 4/3 directional valves, internally pilot-operated, externally pilot-operated
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NBR seal kit for the valve
connection surface
FKM seal kit for the valve
connection surface

10.4 Repair

Explosion hazard caused by improper repair!
Improper repair will void the explosion protection!
For repair works, the valve may only be disassembled to the extent described in
these operating instructions.
Defective parts may only be replaced by new, interchangeable components in
original equipment quality.

10.5 Rectifying external leakages

External leakage at the valve connection surface can be rectified on site.
Other leakages have to be rectified by specialists of the manufacturer.
10.5.1
Rectifying leakage at the valve connection surface
1.
Remove the valve, see chapter 11 "Disassembly and removal".
2.
Inspect the contact surfaces for seal rings at the valve for cleanliness and
damage.
3.
Inspect the seal rings and recesses on the connection flanges for cleanliness and
damage.
4.
Dry the mounting surface and the contact surface using suitable cleaning
materials.
5.
Assemble the new seals.
6.
Re-assemble the valve at the contact surface, see chapter 7 "Assembly".

10.6 Spare parts

Table 12: Replacement NBR seal kit for the valve connection surface
Valve type
H-4WEH10...
H-4WEH16...
H-4WEH25...
H-4WEH32...
Table 13: Replacement FKM seal kit for the valve connection surface
Valve type
H-4WEH10...V...
H-4WEH16...V...
H-4WEH25...V...
H-4WEH32...V...
Ensure the suitability of the sealing materials for the hydraulic fluid used!
See "Data sheet 24751-XE".
Maintenance and repair
WARNING
RE24751-XE-B/10.19, H-4WEH...XE..., Bosch Rexroth AG
41/52
Material number
R961001132
R961001255
R961001257
R961001259
Material number
R961001131
R961001256
R961001258
R961001260

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