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Rexroth A4VSO Hydraulic Pump Replacement

Rexroth A4VSO SERIES

  • Application: Replacement for Rexroth
  • MOQ: 1 PCS
  • Customization: Labels and logo
  • Delivery: 7-15 working days
  • Warranty: 6-12 months
  • Certifications: ISO 9001 / CE
Enquiry
Piston Pump

Name

A4VSO Series
Axial piston variable pump

Series

Series 1x and 3x

Sizes

40 71 125 180 250 355 500 750 1000

Nominal Pressure

350 bar

Maximum Pressure

400 bar

Operation Mode

Open piston pump
  • 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

Size

  

NG

  

40

71

125

180

250

355

500

750

7505)

1000

Geometric displacement
per revolution

Vg max

cm3

40

71

125

180

250

355

500

750

750

1000

Rotational speed
maximum1)

at Vg max 2)

nnom

rpm

2600

2200

1800

1800

1500

1500

1320

1200

1500

1000

at Vg ≤ Vg max 3)

nmax

rpm

3200

2700

2200

2100

1800

1700

1600

1500

1500

1200

Flow

at nnom and Vg max

qv

l/min

104

156

225

324

375

533

660

900

1125

1000

at 1500 rpm

qv

l/min

60

107

186

270

375

533

5816)

7706)

1125

–

Power

at nnom, Vg max
     and Δp = 350 bar

P

kW

61

91

131

189

219

311

385

525

656

583

at 1500 rpm

P

kW

35

62

109

158

219

311

3396)

4496)

656

–

Torque

at nnom, Vg max
     and Δp = 350 bar 2)

M max

Nm

223

395

696

1002

1391

1976

2783

4174

4174

5565

and Δp = 100 bar 2)

M

Nm

64

113

199

286

398

564

795

1193

1193

1590

Rotary stiffness of drive shaft

Shaft end P

c

kNm/rad

80

146

260

328

527

800

1145

1860

1860

2730

Shaft end Z

c

kNm/rad

77

146

263

332

543

770

1136

1812

1812

2845

Moment of inertia

JTW

kgm2

0.0049

0.0121

0.03

0.055

0.0959

0.19

0.3325

0.66

0.66

1.2

Maximum angular acceleration4)

a

rad/s²

17000

11000

8000

6800

4800

3600

2800

2000

2000

1450

Case volume

v

l

2

2.5

5

4

10

8

14

19

22

27

Weight (without through drive) approx.

m

kg

39

53

88

102

184

207

320

460

490

605

 

Product Introduction

Exceptional Durability

The Rexroth A4VSO is a variable displacement axial piston pump designed for closed-loop hydrostatic transmission systems.

It is widely used in excavators, road machinery, agricultural equipment, mining machines and other mobile hydraulic applications.

Hydstar supplies high-quality aftermarket replacements engineered for reliable performance and OEM interchangeability.

Applications

  • Excavators

  • Wheel Loaders

  • Crawler Drills/ Pile Drivers

  • Cranes (Crawler / Rough Terrain )

  • Crushers

  • Concrete Pumps

Piston Pump

Piston Pump

 

Why Choose Hydstar？

30+ Years Manufacturing Experience

23000㎡ Production Facility

ISO9001 Certified

160+ Countries Served

350,000 Units Monthly Capacity

100% Tested Before Shipment

 

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