High-Performance A4VG Rexroth Piston Pump: Engineering Excellence in Closed-Circuit Hydraulics

The A4VG Rexroth Piston Pump gains wide note as a top variable displacement axial piston pump for closed-loop hydrostatic transmissions. It mixes high pressure levels, exact control, good efficiency and lasting strength. So, the A4VG Rexroth Piston Pump stays the top pick in many hard mobile and industrial jobs around the world.

Core Design Principles of the A4VG Rexroth Piston Pump

The A4VG Rexroth Piston Pump uses a swashplate-type axial piston setup. Output flow matches input speed and swashplate angle. Shifting the swashplate past the neutral spot gives smooth flow turn without valves. This is a main plus for two-way closed-circuit drives.

Integrated Charge and Protection Systems in the A4VG Rexroth Piston Pump

A built-in extra charge pump gives boost pressure and pilot oil. It keeps steady inlet states in low-speed work, cold starts and high load changes. High-pressure relief valves have a built-in boost job and set pressure cut-off. These guard the pump and parts after it from too much pressure.

Through-Drive Capability of the A4VG Rexroth Piston Pump

The back through-drive spot lets direct setup of more pumps (same or smaller frame size). No outside links or gearboxes are needed. This setup aids small multi-pump plans. Such plans fit machines that run many separate hydraulic lines from one main driver.

Detailed Technical Specifications of the A4VG Rexroth Piston Pump

The A4VG Rexroth Piston Pump comes in many sizes to fit varied power and flow needs:

• Displacement (Vg max): 28 – 250 cm³/rev
• Nominal continuous pressure: 400 bar
• Maximum pressure: 450 bar
• Theoretical maximum flow: up to ≈ 600 L/min (size- and speed-dependent)
• Maximum power: up to ≈ 400 kW
• Nominal speed range: 2,400 – 4,250 rpm (decreasing with increasing frame size)
• Permissible peak speed: significantly higher than nominal in most sizes
• Charge pump displacement: 6.1 – 28.3 cm³/rev (depending on frame size)

The setup has low turn inertia for quick reply, high twist strength, set port timing and good case drain space for heat loss.

Standout Features Enhancing Performance of the A4VG Rexroth Piston Pump

Some strong design traits make the A4VG Rexroth Piston Pump fit well for tough work spots.

Wide Range of Control Concepts for the A4VG Rexroth Piston Pump

The line gives many control picks to fit almost any machine build:

• HD – Hydraulic proportional control (pressure-related)
• HW – Hydraulic proportional control with mechanical feedback
• DA – Automatic control, engine-speed related (power limiting)
• DG – Direct hydraulic control
• EP – Electric proportional control
• EZ – Electric two-position control
• ET – Electric direct control
• BT – BODAS electronic control interface

These types allow easy join with mechanical, electro-hydraulic or full electric control setups.

Noise & Vibration Optimization in the A4VG Rexroth Piston Pump

Set port plate timing, piston shape and swashplate hold design cut fluid beat, noise from build and shake a lot. Lower shake levels boost worker ease, lengthen life of hoses, fits and linked parts. They also aid meet strict noise rules.

Typical Applications Powered by the A4VG Rexroth Piston Pump

The A4VG Rexroth Piston Pump does well in closed-circuit jobs that need high power pack, even turn and exact speed/torque hold.

Mobile Machinery Applications of the A4VG Rexroth Piston Pump

• Crawler and wheeled excavators (travel & swing circuits)
• Wheel loaders, telescopic handlers and backhoe loaders
• Dozers, motor graders and soil compactors
• Agricultural tractors, combine harvesters and forage harvesters
• Forestry machines (forwarders, harvesters, skidders)
• Mobile cranes, reach stackers and heavy-duty material handlers

Industrial & Stationary Applications of the A4VG Rexroth Piston Pump

• Hydrostatic drives in injection molding machines
• Closed-loop systems in metal-forming and forging presses
• Test stands, dynamometers and simulation rigs
• Winch drives and cable tensioning systems
• Specialized machine tools requiring high dynamic response
  

Energy Efficiency Advantages of the A4VG Rexroth Piston Pump

The variable displacement setup of the A4VG Rexroth Piston Pump gives just the flow and pressure needed at any time. This leads to:

• Big cut in energy use over fixed-displacement setups
• Lower fuel need in diesel-run mobile gear
• Less heat make → smaller cooling sets and lower fan power need
• Lower work temps → longer fluid life and steadier thickness
• Cut power need from the main driver

When mixed with electric load-sense and power plan steps, full machine efficiency can grow more.

Correct Installation and Commissioning Practices for the A4VG Rexroth Piston Pump

Right setup and careful start-up are key to hit rated work and get max service life.

• Make sure shaft line and link fits meet manufacturer specs
• Use big enough suction lines to skip cavitation
• Put the top case drain port up in work
• Flush the whole hydraulic system well before first start
• Follow set run-in steps (slow rise of pressure and speed)
• Note charge pressure, case drain flow and high-pressure sets in start-up for base check

Comprehensive Maintenance Guidelines for the A4VG Rexroth Piston Pump

Steady upkeep ways lengthen service times a lot. They also help stop surprise down time.

Fluid Quality and Filtration Strategy

Keep hydraulic fluid clean at ISO 4406 class 18/16/13 or better. Set high-work filters on pressure and return lines. Watch diff pressure signs. Pick fluids that stay in the set thickness range over full work temp span.

Predictive Condition Monitoring of the A4VG Rexroth Piston Pump

Check and note often:

• Charge (boost) pressure
• Case drain flow rate
• External leakage
• High-pressure ripple and peak values

A climbing case drain flow rate is often the first sign of inner wear you can spot.

Scheduled Overhaul Inspection Points

In set upkeep, check:

• Shaft seal state and leak
• Swashplate bearing gap and move ease
• Control spool and valve plate wear marks
• Torque of key fasteners
• Line in multi-pump setups

POOCCA is a professional manufacturer and supplier offering both original branded hydraulic equipment — including genuine A4VG Rexroth Piston Pump units — as well as its own high-quality POOCCA series of variable axial piston pumps engineered to match the performance, mounting dimensions and functional characteristics of leading premium series.

With more than 20 years of experience in hydraulic component production, ISO-certified manufacturing processes, rigorous multi-stage testing, a 12-month product guarantee and exports to over 120 countries, POOCCA provides reliable solutions supported by professional technical consultation and customization services.

FAQ

What are the nominal and maximum pressure ratings of the A4VG Rexroth Piston Pump?

Nominal continuous pressure is 400 bar; maximum pressure is 450 bar.

Which displacement sizes does the A4VG Rexroth Piston Pump series cover?

Displacements range from 28 cm³/rev to 250 cm³/rev.

Does the A4VG Rexroth Piston Pump include an integrated charge pump?

Yes — an auxiliary charge pump is standard across the series.

What control types are available for the A4VG Rexroth Piston Pump?

Hydraulic (HD, HW, DA, DG), electric (EP, EZ, ET) and electronic/BODAS (BT) controls are available.

Is the A4VG Rexroth Piston Pump designed for bidirectional operation?

Yes — flow can be smoothly reversed through the neutral swashplate position without additional valving.

Source Original & High-Performance Pumps from a Proven Manufacturer and Supplier

OEMs, system integrators and distributors requiring genuine A4VG Rexroth Piston Pump units or high-quality equivalent variable displacement piston pumps are invited to contact an established manufacturer and supplier. As a dedicated factory offering both original branded equipment and its own premium POOCCA series of axial piston pumps engineered to match the performance of series such as the A4VG Rexroth Piston Pump, POOCCA delivers competitive factory-direct pricing, short lead times, customization capabilities and comprehensive technical support. Contact the team today at sales@kamchau.com or +86 18927498997 to discuss specifications, request quotations or arrange supply agreements for production programs. Partner with a trusted manufacturer committed to quality, reliability and customer success.