Bosch Rexroth H-4WEH...XE Series - Hydraulic System Bleeding and Leak Testing

Commissioning 35/52
RE24751-XE-B/10.19, H-4WEH...XE..., BoschRexrothAG
▶ Check the inside of the terminal box for corrosion. In case of visible corrosion,
donot install the valve.
▶ Electrical connections in the terminal box must be checked for proper condition
by or under the guidance and supervision of a specialized electrician before the
initial commissioning or any re-commissioning.
▶ Seals are subject to a natural process of aging and, for this reason, check seals
for damages every time the terminal box is opened and replace them if required.
Observe the operating instructions of the device and/or system into which the
valve is installed.
▶ Before the actual operation, switch the valve several times with reduced
pressure(50% operating pressure). This will press out any remaining air from
the valve. Thus, mechanical damage caused by inadmissibly high acceleration of
the fluid and the valve control spool is avoided and the life cycle of the valve is
extended.
Do not switch the valve under operating pressure as this may cause damage.
▶ You can also achieve the switching movement of the valve control spool
necessary for the bleeding procedure by manual actuation of the manual
override, seechapter9.2 "Operating the manual override (only relevant for
typeH-4WEH./.NXE.)".
▶ Ensure that no hydraulic fluid leaks at the valve and the connections during
operation.
▶ Check whether there is an internal leakage. The check must be carried out
accordingto the possibilities present at the hydraulic system.
An internal leakage can be valve-specific but does not necessarily affect the
functionality of the valve.
Checking electrical
connections
Bleeding the
hydraulic system
Performing a leak test