Performing Functional Test; Running-In Phase - Bosch 70 Series Instruction Manual

38/52 Commissioning
Bosch Rexroth AG, A2FM/A2FE Series 70, RE 91071-01-B/03.2015
To test the hydraulic fluid supply:
1.
Allow the axial piston unit to run at low speed and without load.
Pay attention to leaks and noises.
2. Check the axial piston unit's drain line during the test. The drain fluid should not
contain any bubbles.
3. Increase the load and check whether the working pressure rises as expected.
4. Perform a leak test to ensure that the hydraulic system is sealed and can
withstand the maximum pressure.
5. At maximum working pressure, check the case pressure at port T
the data sheet 91071 for the permissible value.

8.1.3 Performing functional test

Improperly connected axial piston unit!
Mixing up the ports will cause malfunctions (e.g., lift instead of lower) and could
endanger persons and equipment!
▶ Before the functional test, check whether the piping specified in the hydraulic
schematic has been installed.
Once you have tested the hydraulic fluid supply, you must perform a functional test
on the machine/system. The functional test should be performed according to the
instructions of the machine/system manufacturer.
The axial piston unit is checked for functional capability before delivery according to
the technical data. During commissioning, it must be ensured that the axial piston
unit was installed properly in the machine/system.
▶ After starting the drive motor, check in particular the specified pressures, e.g.,
working pressure and case pressure.
▶ Perform a leak test without and with load prior to normal operation.
▶ If necessary, disconnect the pressure gauge and plug the ports with the
designated threaded plugs.

8.2 Running-in phase

Property damage from insufficient viscosity!
An increased hydraulic fluid temperature may reduce the viscosity values by too
much and damage the product!
▶ Monitor the operating temperature during the running-in phase, e.g., by
measuring the leakage temperature.
▶ Reduce the loading (pressure, rotational speed) of the axial piston unit if
impermissible operating temperatures and/or viscosities occur.
▶ Operating temperatures that are too high indicate faults that have to be
analyzed and cleared.
The bearings and sliding surfaces are subject to a running-in phase. The increased
friction at the start of the running-in phase results in increased heat development
which decreases with increasing operating hours. The volumetric and mechanical-
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NOTICE
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