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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 stationary applications.
Refer to data sheet 92105 and the order confirmation for the technical data,
operating conditions and operating limits of the axial piston unit.
5.2 Product description
The A4CSG is a variable pump with axial piston rotary group in swashplate design for
hydrostatic drives in closed circuits. The flow is proportional to the drive speed and
displacement.
The flow can be changed steplessly by controlling the swashplate (cradle) (14). For
axial piston units in swashplate design, the cylinder (11) with pistons (12) is to be
aligned axially to the drive shaft (1).
Closed circuit
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 then a high-pressure side (7) and a low-pressure side (9), which can change
according to loading. The integrated boost pump (8) feeds into the low pressure side
and compensates for volumetric losses.
5.2.1 layout of the axial piston unit
1
Fig. 2: layout of A4CSG ; example nG 500 left, nG 355 right
1 Drive shaft
2 Ground terminal
(2 additional ground
terminals are located
on the solenoids)
3 Retaining plate
4
3
2
14
13
12
11
4 Stroking piston
5 EP control module
5.1Pressure control
6 Control plate
(distributor plate)
7 High-pressure side
8 Boost pump
RE 92105-01-B/06.2017, A4CSG, Series 3x, Bosch Rexroth AG
About this product
5.1
5
6
7
8
9
10
9 Low-pressure side
10 Suction port
11 Cylinder
12 Piston
13 Slipper pad
14 Swashplate
(cradle)
19/68
5
5.1
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