REXROTH A4VSG - Hydraulically Connecting the Axial Piston Unit

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Installation 35/60
RE 92100-01-B/09.2012, A4VSG Series 10, 11 and 30, Bosch Rexroth AG
7.4.8 Hydraulically connecting the axial piston unit
NOTE
Insufficient suction/boost pressure!
For axial piston pumps, a minimum permissible suction pressure is generally
specified at portS or boost pressure at portE. These are valid for all installation
positions. If the pressure at port S or E drops below the specified values, damage
may occur which may lead to the axial piston pump being damaged beyond repair!
▶ Make certain that the necessary suction/boost pressure is achieved at all times.
This is influenced by:
– the piping (e.g. suction cross-section, pipe diameter, length of suction/boost line)
– the position of the reservoir
– the viscosity of the hydraulic fluid
– a filter cartridge or check valve which may be present in the suction/boost line
(check degree of contamination of filter cartridge regularly)
The machine/system manufacturer is responsible for dimensioning the lines. The
axial piston unit must be connected to the rest of the hydraulic system in accordance
with the hydraulic schematic of the machine/system manufacturer.
The ports and fastening threads are designed for the maximum pressure specified in
the data sheet. The machine/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.
Connect only hydraulic lines that are appropriate for the axial piston unit port
(pressure level, size, system of units).