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Rexroth A4VG Hydraulic Pump Replacement

Rexroth A4VG 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

A4VG Series Axial piston variable pump

Series

Series 32

Sizes

28 40 56 71 90 125 180 250

Nominal Pressure

400 bar

Maximum Pressure

450 bar

Operation Mode

Closed Circuit
  • Variable axial piston pump of swash plate design for hydrostatic closed circuit transmissions
  • 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
  • EThe 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
  • The integral pressure cut-off is standard

Size

NG

28

40

56

71

90

125

180

250

Displacement
variable pump

Vg max

cm3

28

40

56

71

90

125

180

250

boost pump (at p = 20 bar)

Vg Sp

cm3

6.1

8.6

11.6

19.6

19.6

28.3

39.8

52.5

Speed1)

maximum at Vg max

nnom

rpm

4250

4000

3600

3300

3050

2850

2500

2400

limited maximum2)

nmax

rpm

4500

4200

3900

3600

3300

3250

2900

2600

intermittent maximum3)

nmax

rpm

5000

5000

4500

4100

3800

3450

3000

2700

minimum

nmin

rpm

500

500

500

500

500

500

500

500

Flow at nnom and Vg max

qv

L/min

119

160

202

234

275

356

450

600

Power4)
at nnom, Vg max and 

Dp = 400 bar

P

kW

79

107

134

156

183

238

300

400

Torqu4)
at Vg max and

Dp = 400 bar

T

Nm

178

255

357

452

573

796

1146

1592

Dp = 100 bar

T

Nm

45

64

89

113

143

199

286

398

Rotary stiffness drive shaft

S

c

kNm/rad

31.4

69

80.8

98.8

158.1

218.3

244.5

354.5

T

c

kNm/rad

–

–

95

120.9

–

252.1

318.4

534.3

A

c

kNm/rad

–

79.6

95.8

142.4

176.8

256.5

–

–

Z

c

kNm/rad

32.8

67.5

78.8

122.8

137

223.7

319.6

624.2

U

c

kNm/rad

–

50.8

–

–

107.6

–

–

–

Moment of inertia for rotary group

JGR

kgm2

0.0022

0.0038

0.0066

0.0097

0.0149

0.0232

0.0444

0.0983

Maximum angular acceleration5)

a

rad/s2

38000

30000

24000

21000

18000

14000

11000

6700

Case volume

V

L

0.9

1.1

1.5

1.3

1.5

2.1

3.1

6.3

Mass approx. (without through drive)

m

kg

29

31

38

50

60

80

101

156

Center of gravity6)

X

mm

< 5

< 5

< 5

< 5

< 5

< 5

< 5

< 5

Y

mm

24

20

20

15

20

30

33

30

Z

mm

105

112

106

135

145

160

180

203

 

Product Introduction

Exceptional Durability

The Rexroth A4VG 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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