Axial piston variable pumpA4VSO 250LR2D/30R-PPB13N00

Project planning notes
Project planning notes

▶▶ The A4VSO axial piston variable pump is designed to be
used in open circuit.
▶▶ The project planning, installation and commissioning of
the axial piston unit requires the involvement of qualified
skilled personnel.
▶▶ Before using the axial piston unit, please read the corresponding
instruction manual completely and thoroughly.
If necessary, this can be requested from Bosch
Rexroth.
▶▶ Before finalizing your design, please request a binding
installation drawing.
▶▶ The specified data and notes must be observed. More
information on the products can be found in the data
sheets on page 1.
▶▶ Depending on the operating conditions of the axial
piston unit (working pressure, fluid temperature), the
characteristic curve may shift.
▶▶ The characteristic curve may also shift due to the dither
frequency or control electronics.
▶▶ Preservation: Our axial piston units are supplied as
standard with preservative protection for a maximum of
12 months. If longer preservative protection is required
(maximum 24 months), please specify this in plain text
when placing your order. The preservation periods apply
under optimal storage conditions, details of which can
be found in the data sheet 90312 or in the instruction
manual.
▶▶ Not all versions of the product are approved for use in
safety functions according to ISO 13849. Please consult
the responsible contact person at Bosch Rexroth if you
require reliability parameters (e.g. MTTFd) for functional
safety.
▶▶ Depending on the type of control used, electromagnetic
effects can be produced when using solenoids. Use of
the recommended direct current (DC) on the electromagnet
does not produce any electromagnetic interference
(EMI), nor is the electromagnet influenced by EMI. Potential
electromagnetic interference (EMI) exists if the solenoid
is energized with a modulated direct current (e.g.
PWM signal). The machine manufacturer should conduct
appropriate tests and take appropriate measures to
ensure that other components or operators (e.g. with a
pacemaker) are not affected by the potentiality.
▶▶ Pressure controllers are not safeguards against pressure
overload. Be sure to add a pressure relief valve to the
hydraulic system.
▶▶ For drives that are operated for a long period with
constant rotational speed, the natural frequency of the
hydraulic system can be stimulated by the excitation
frequency of the pump (rotational speed frequency ×9).
This can be prevented with suitably designed hydraulic
lines.
▶▶ Please note the details regarding the tightening torques
of port threads and other threaded joints in the instruction
manual.
▶▶ Working ports:
–– The ports and fastening threads are designed for the
specified maximum pressure. The machine or system
manufacturer must ensure that the connecting elements
and lines correspond to the specified application
conditions (pressure, flow, hydraulic fluid, temperature)
with the necessary safety factors.
–– The working ports and function ports are only
intended to accommodate hydraulic lines

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