Aftermarket Replacement A4VSO axial piston pumps

The A4VSO is a swashplate-type axial piston variable pump for open circuit, for higher-displacement requirements. The family covers Series 10/11/30, sizes NG40 to NG1000, with 350 bar nominal and 400 bar peak pressure; common controls include DR, DFR, LR, EM, HS and DFE1. We currently stock sizes NG40 to NG500; larger sizes and special versions are available on request. All units are new aftermarket replacements, quality checked before shipping.

Technical data — A4VSO

Size (NG)	40	71	125	180	250	355	500	750	1000
Displacement Vg max (cm³)	40	71	125	180	250	355	500	750	1000
Nominal / peak pressure	350 bar nominal / 400 bar peak
Max speed at Vg max (rpm)	2600	2200	1800	1800	1500	1500	1320	1200	1000
Flow at 1500 rpm (l/min)	60	107	186	270	375	533	581	770	1125
Circuit	Open circuit, swashplate design
Series	10 / 11 / 30

Available controls

DR — pressure controller
DP — pressure controller for parallel operation
DFR — pressure and flow controller
LR — power controller (hyperbolic curve)
MA / EM — manual / electric motor control
HS / HM / HD — electro-hydraulic, servo-proportional, pilot-pressure control
DFE1 / SYDFEE — electro-hydraulic closed-loop control

Typical applications

A4VSO is used where large flow at 350-bar class pressure is needed in industrial and mobile circuits — presses, forming machines, test rigs and large-machine main pumps. It is a separate higher-displacement line from the A10V family; always match by the full nameplate code, whose size, control and flange positions are defined by the model-code system.

Need help choosing the right pump? Send us your existing model code — we will confirm the correct configuration before you order. Contact us