Hydraulically Connecting The Axial Piston Unit - Bosch rexroth A4VSO 10 Series Instruction Manual

Fig. 11: removing transport protection
1 Protective covers
2 Protective plugs/threaded plugs
Ports intended for connecting lines come with protective plugs and/or threaded
plugs, which serve as transport protection. Make sure all ports required for
functional operation are connected (see Table 15 "Ports A4VSO" on page 43).
Failure to do so could lead to malfunctions or damage. If a port is not being used,
plug it with a threaded plug since the protective plugs are not pressure-resistant.
The setting screws are protected against unintentional adjustment by caps.
Adjusting the setting screws will render the warranty void. If you need to change
settings, contact your Bosch Rexroth Service partner; see chapter 10.5 "Repair"
on page 61 for an address.
3. For versions with through drive, install the auxiliary pump according to the pump
manufacturer's instructions.
7.4.8 Hydraulically connecting the axial piston unit
insufficient suction pressure!
Generally, a minimum permissible suction pressure at port S is specified for axial
piston pumps in all installation positions. If the pressure at port S drops below
the specified values, damage may occur which may lead to the axial piston pump
being damaged beyond repair!
▶ Make sure the necessary suction pressure is maintained. This is influenced by:
– The piping (e.g. suction cross-section, pipe diameter, length of suction line)
– The position of the reservoir
– The viscosity of the hydraulic fluid
– A filter element or check valve in the suction line (check the level
of contamination of the filter element regularly)
The machine/system manufacturer is responsible for dimensioning of the lines.
Connect the axial piston unit to the rest of the hydraulic system in accordance with
the hydraulic circuit diagram 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 is required to ensure that
the connecting elements and lines correspond to the specified application
conditions (pressure, flow, hydraulic fluid, temperature) with the necessary
safety factors.
RE 92050-01-X-B1/2019.08.23, Axial piston variable pump A4VSO, Bosch Rexroth AG
3 For version with through drive,
flange cover and fixing screws
NOTICE
Installation 41/72