A4vg Series Axial Variable Piston Pump A4vg56/71/90/125/140/180/250 Closed Circuit for Construction Machinery

Product Description

Product Description

 

The A4VG series is swashplate variable displacement axial piston pump specially engineered for closed-circuit hydrostatic transmission systems. With nominal working pressure up to 400 bar and peak pressure reaching 450 bar, this heavy-duty pump is well recognized as the core power component for mobile construction machinery. Integrated with built-in charge pump, relief valves and pressure cut-off function, it delivers stable bi-directional flow output and smooth speed regulation.

 

Typical Application Scenarios

Lifting Machinery: Mobile cranes, truck-mounted cranes, crawler cranes, aerial work platforms
Concrete Equipment: Concrete mixer trucks, concrete pump trucks
Earthmoving Machinery: Wheel loaders, road rollers, asphalt pavers, milling machines
Agricultural Machinery: Large combine harvesters, self-propelled sprayers
Special Vehicles: Hydraulic flatbed transport trucks, mining auxiliary equipment, forestry machinery

 

Core Advantages vs Peer Competitors

1. Complete integrated structure with built-in charge pump, high-pressure relief valves and pressure cut-off valve. Simplify system piping, reduce auxiliary component costs and lower failure points.
2. High pressure rating (400 bar continuous / 450 bar intermittent), robust rotary group design, outstanding durability under shock load and frequent forward-reverse switching conditions.
3. Wide selection of control modules: DA, HW, HD, EP, EZ, BT etc. Supports speed sensing, hydraulic proportional, electric proportional and two-point control to satisfy diversified drive schemes.
4. Smooth flow reversal by passing swashplate through neutral position; low vibration and stable running, effectively improve equipment operation comfort.
5. Optional through-drive interface, supports tandem pump assembly, easy to realize multi-circuit composite hydraulic systems.
6. Optimized friction pair design achieves high volumetric efficiency, reduces system heat generation and lowers fuel consumption for mobile machines.
7. Standardized mounting dimensions and port layout, high interchangeability; original and replacement versions are directly compatible for equipment renovation.
8. Excellent suction performance, effectively avoid cavitation risk under low-temperature cold start and variable speed working conditions.

 

Product Parameters

A4VG Series Variable Displacement Axial Piston Pump

 

 

 

 

 

 

Model	Max Displacement (cm³/rev)	Nominal Pressure (bar)	Peak Pressure (bar)	Max Speed @Full Displacement (rpm)	Intermittent Max Speed (rpm)	Flow @Nominal Speed (L/min)	Approx. Weight (kg)
A4VG28	28	400	450	4250	5000	119	29
A4VG40	40	400	450	4000	5000	160	31
A4VG56	56	400	450	3600	4500	202	38
A4VG71	71	400	450	3300	4100	234	50
A4VG90	90	400	450	3050	3800	275	60
A4VG125	125	400	450	2850	3450	356	80
A4VG180	180	400	450	2500	3000	450	101
A4VG250	250	400	450	2400	2700	600	156

Control Mode Code Definition

Code	Control Mode Description
DA	Speed-related Automatic Control (Engine Load Sensing)
HW	Mechanical Servo Control
HD	Hydraulic Proportional Pilot Control
EP	Electric Proportional Control (12V / 24V)
EZ	2-Point Electric Switch Control
DG	Direct Hydraulic Control
BT	BODAS Electronic Control

 

Detailed Photos

 

 

 

Company Profile

Our company is a professional agent to sell Rexroth's industrial hydraulic and walking hydraulic products, hydraulic pumps, hydraulic valves, direction control valves, flow control valves, pressure control valves, proportional valves series.The company has established a long-term supply and trust relationship with China's distributors, production factories and users of rexroth hydraulic system with its advantages of complete range of rexroth products, low price, fast delivery time and guaranteed after-sales service.At the same time, in order to shorten the delivery period to ensure the customer's personal interests, we also set up the inventory of rexroth common spare parts, and sent a special person to manage.Some of the products can be supplied from stock, the specific price is subject to the model provided by the inquiry.

Our Advantage
1.Lots of available Hydraulic parts in stock.
2. We are professional supplier of  hydraulics. have supplying Hydraulic Pump,Hydraulic Motor,Hydraulic Piston Pump&Hydraulic Piston Motor,Gear Pump,Gearbox and wide range of hydraulic parts.
3. Our factory has more than 10 years experience in hydraulic field.
4.We have fast service of delivery because we have stock.

FAQ

Q1:Could you custom products?

We can manufacture it according to your drawings or samples.

Q2: I want to buy your products, how can I pay?

A :You can pay via T/T , WEST UNION or other payment terms we reach agreement.

Q3: How can you guarantee the quality?

A: One year's warranty against B/L date.

If You meet with quality problem, we promise to responsible for it.

Q4: If we don't find what we want on your website, what should we do?

A: You can email us the descriptions and pictures of the products you need, We will check whether we can make it.

Q5: Can we buy 1 pc of each item for quality testing?

A: Yes, we understand quality test is important and we are glad to send 1pc for quality testing.

Q6: What is the lead time?

A: For this product, normally 3 days,3 days and lead time is calculated from the day we receive your deposit.

Exact time is determined by factory schedule.