REXROTH Hydraulic Piston Pump

Hydrostatic closed circuit transmissions benefit from the A10VG's infinitely variable drive speed and displacement proportions.

Variable axial piston pump of swash plate design for hydrostatic closed circuit transmission

Flow is proportional to drive speed and displacement and is infinitely variable

Output flow increases with the swivel angle of the swash plate from 0 to its maximum value

Flow direction changes smoothly when the swash plate is moved through the neutral position

A wide range of highly adaptable control devices is available for different control and regulating functions

The pump is equipped with two pressure-relief valves on the high pressure ports to protect the hydrostatic transmission (pump and motor) from overload

The high-pressure relief valves also function as boost valves – The integrated boost pump acts as a feed and control oil pump

The maximum boost pressure is limited by a built-in boost pressure relief valve

Rexroth Axial Piston Variable Pump A4VG Description
Axial piston variable pump A4VG series 32
● High pressure pump for applications in closed circuits
A4VG28 A4VG45 A4VG50 A4VG56 A4VG71 A4VG125 A4VG180 A4VG250 A4VG 28 NVD**/32R, A4VG 40 HD3D**/32R, A4VG 56 HWD**/32R,  A4VG 71 DA1D**/32R, A4VG 90 EZ1D**/32R, A4VG 125 EP4D**/32R.
● Nominal pressure 400 bar
● Maximum pressure 450 bar
Integrated boost pump for boost and pilot oil supply
Flow direction changes smoothly when the swashplate is moved through the neutral position
High-pressure relief valves with integrated boost function
With adjustable pressure cut-off as standard
Boost-pressure relief valve
Through drive for mounting of further pumps up to same nominal size
Large variety of controls
Swashplate design

A7VO28 A7VO55 A7VO80 A7VO107 V160 A7VO250 A7VO350 A7VO500
Robust high pressure pump for universal use
Size 28 … 500
Nominal pressure 350 bar
Maximum pressure 400 bar
Open circuit
● Robust pump with long service life
● Hyperbolic power controller
● Large variety of controls
● Well-tried rotary group technology
● High total efficiency
● Optional high-speed version for nominal size 250
● Optional with long-life bearings for the nominal sizes 250 to 500
● Bent-axis design

Series 10, 11 and 30
Size 40...1000
Nominal pressure 350 bar
Peak pressure 400 bar
Open circuit

For machines with medium pressure requirements
A10VSO18 A10VSO28 A10VSO45 A10VSO71 A10VSO100 A10VSO140 A10VSO180 
Nominal pressure 250 bar
Maximum pressure 315 bar

Open circuit
● Through drive for mounting of further pumps up to same nominal size
● Approved for high speeds
● Low operating noise
● Controls with short response times
● Large variety of controls
● High power density
● Swashplate design