Operation; Maintenance And Repair - Bosch Rexroth 4WRPEH6 3X Operating Instructions Manual

Bleeding the
hydraulic system
Performing the leak test
Performing the
functional test
RE 29118-B/09.2021; 4WRPEH6_3X, 4WRPEH10_3X, 4WRPE6_3X, 4WRPE10_3X, 4WRLE_4X; Bosch Rexroth AG
Bleeding of the valve is usually not necessary. However, Bosch Rexroth recommends
bleeding the entire hydraulic system. The following points must be observed:
▶ Before actual operation, switch the valve several times with reduced
pressure (50% operating pressure). This will expel any remaining air from
the valve.
NOTICE! Damage of the valve and the system! Do not switch the valve under
operating pressure as long as the system has not been bled!
Ensure that no hydraulic fluid leaks at the connections during operation.
If possible, check hydraulic functions in a controlled way and at low pressure first.
Observe the operating instructions of the hydraulic system into which the valve is
installed.

9 Operation

During normal operation, the user does not need to intervene.
In case of power failure during operation, the valve may be switched on again
without any further measures. It is immediately ready for operation.

10 Maintenance and repair

Bosch Rexroth valves are usually maintenance-free.
The valve seals are subject to a process of natural wear and aging. It is therefore
recommended to replace the valves at appropriate time intervals. The intervals
are mainly determined by the operating conditions and the cleanliness of the
hydraulic fluid.
▶ Regularly check the product and mounting surfaces for leak-tightness!
▶ As a precaution, exchange seals at reasonable time intervals.
Preventative maintenance (e.g.: hydraulic fluid care) as well as compliance with
the pressure and temperature specifications extend the life cycle of the valve,
system and hydraulic fluid.
Operation 33/44