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About this product
Closed circuit
Bosch Rexroth AG, A4VG Series 35, RE 92035-01-B/2019-11-25
5 About this product
5.1 Performance description
The axial piston variable pump generates, controls and regulates a hydraulic fluid
flow. It is designed for mobile applications such as construction machinery.
Refer to data sheet 92035 and the order confirmation for the technical data,
operating conditions and operating limits of the axial piston unit.
5.2 Product description
A4VG is a variable pump with an axial piston rotary group in swashplate design
for hydrostatic drives in closed circuits. Flow is proportional to drive speed and
displacement. The flow can be smoothly changed using the control (cradle) (12).
For axial piston units with swashplate design, the pistons are arranged axially
relative to the drive shaft.
In the closed circuit, the hydraulic fluid flows from the hydraulic pump to the
consumer, e.g. hydraulic motor and from there directly back to the hydraulic pump.
There is a high-pressure side and a low-pressure side which alternate depending on
which side is under load.
5.2.1 Axial piston unit layout
2
1
12
11
Fig. 2: Series 35 A4VG layout
1 Drive shaft
2 Retaining plate
3 Stroking piston
4 Control plate
(Distributor plate)
3
10
9
5 High-pressure side
6 Boost pump
7 Low-pressure side
8 Suction port
9 Cylinder
4
5
6
7
8
10 Piston
11 Slipper pad
12 Cradle
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