Mobile Hydraulic Pumps: Bosch Rexroth Series | Hidroman

Axial Piston Variable Displacement Pumps for Mobile Equipment: Bosch Rexroth Series and Selection Guide

Axial piston variable displacement pumps are essential components in mobile hydraulic systems, delivering controlled hydraulic flow for construction equipment, agricultural machinery, material handling systems, and other heavy-duty applications. Selecting the right hydraulic pump helps improve machine performance, support efficient power transmission, and maintain reliable operation under demanding working conditions.

Bosch Rexroth offers a range of axial piston pumps designed for different hydraulic circuit configurations, pressure requirements, and control strategies. Understanding the differences between pump series is an important step when specifying a new hydraulic pump, replacing an existing unit, or evaluating a mobile hydraulic system.

At Hidroman, we recognize the importance of matching hydraulic components to the actual operating requirements of the machine. This guide covers key Bosch Rexroth pump series, including A4VG, A10VG, A15V, A1VO, A10VO, and A11VO, along with practical considerations for hydraulic pump selection and replacement.

What Is an Axial Piston Variable Displacement Pump?

An axial piston variable displacement pump converts mechanical input power into hydraulic energy. Pistons arranged parallel to the drive shaft move within a rotating cylinder block, drawing hydraulic fluid into the pump and delivering pressurized fluid to the hydraulic circuit.

Unlike a fixed displacement pump, a variable displacement pump can adjust the volume of fluid delivered per revolution. Depending on its design and control system, this allows the pump to respond to changing flow demands and operating conditions.

Axial piston variable displacement pumps are commonly used in:

Excavators and earthmoving equipment
Wheel loaders and construction machinery
Agricultural and forestry equipment
Mobile cranes and material handling machinery
Hydrostatic drive systems
Specialized industrial and mobile hydraulic applications

Open-Loop vs. Closed-Loop Hydraulic Pumps

Understanding the hydraulic circuit is critical when choosing a replacement pump.

Open-circuit hydraulic pumps draw fluid from a reservoir and deliver it to valves, cylinders, and hydraulic motors. Return fluid flows back to the tank.

Closed-circuit hydraulic pumps circulate the main hydraulic flow between the pump and a hydraulic motor. These systems are commonly used in hydrostatic travel drives and other applications requiring controlled bidirectional power transmission.

A pump designed for one circuit type should not be assumed suitable for the other. Circuit configuration, pressure ratings, control options, and installation requirements must all be verified.

Bosch Rexroth Axial Piston Pump Series and Model Codes

Bosch Rexroth offers multiple axial piston pump families for mobile and other hydraulic applications. The following table provides a general overview of relevant series and their typical application categories.

Pump series or model designation	General application
A4VG	Closed-loop hydrostatic transmissions
A4VG/35	A4VG product family, Series 35 configurations
A4VG/40	A4VG product family, Series 40 configurations
A10VG/10	Closed-loop hydrostatic applications
A15V	Variable displacement axial piston pump family for applicable mobile hydraulic systems
A1VO	Open-circuit variable displacement pump applications
A10VO	Open-circuit axial piston pump applications
A10VNO	Related open-circuit pump family and configurations
A11VO	High-pressure open-circuit mobile hydraulic applications
A7VO	Open-circuit high-pressure hydraulic applications
A8VO	Pump applications including certain excavator hydraulic systems
A15VSO	Related axial piston pump family; verify the exact designation and application
A18VO	Axial piston pump family for applicable mobile hydraulic systems

Important: This is a general series identification guide, not a compatibility list. Not every series is suitable for every mobile machine. Exact specifications, series designations, displacement ranges, pressure ratings, and control options must be confirmed using the applicable Bosch Rexroth technical documentation.

1. Bosch Rexroth A4VG Variable Displacement Pumps

The Bosch Rexroth A4VG series is associated with closed-loop hydrostatic transmission systems. These pumps work with hydraulic motors to transfer power to machine travel drives and other suitable hydrostatic applications.

Typical application areas include:

Hydrostatic drives for mobile equipment
Construction and earthmoving machinery
Wheel and track drive systems
Specialized machines requiring controlled hydraulic power transmission

A4VG Model Designations

A4VG/35
A4VG/40

These designations identify A4VG product family configurations. They do not, by themselves, provide all the information required to order a replacement pump.

When selecting an A4VG pump, verify:

Nominal displacement
Maximum and continuous operating pressure
Maximum input speed
Control configuration
Charge pump requirements
Shaft and mounting flange dimensions
Hydraulic port connections
Rotation and installation requirements

The hydraulic motor, charge circuit, and control system must also be considered when replacing a pump in a closed-loop transmission.

2. Bosch Rexroth A10VG Pumps

The A10VG/10 designation is associated with a Bosch Rexroth variable displacement pump family used in closed-loop hydrostatic applications.

Selection depends on the machine's travel requirements, hydraulic motor characteristics, operating pressure, speed range, and control configuration.

A10VG Model Designation

A10VG/10

The A10VG and A4VG families should not be treated as interchangeable solely because both are associated with closed-loop applications. Their technical specifications and installation requirements can differ.

Always compare the complete pump part number with the original equipment documentation before ordering a replacement.

3. Bosch Rexroth A15V Variable Displacement Pumps

The A15V designation identifies an axial piston variable displacement pump family that may be relevant to selected mobile hydraulic applications.

The correct configuration depends on the required flow rate, operating pressure, input speed, and control requirements.

Key selection considerations include:

Required hydraulic flow and displacement
Continuous and intermittent operating pressure
Drive shaft speed
Hydraulic control and regulation type
Mounting and connection dimensions
Hydraulic fluid specifications
Operating temperature and duty cycle

Because configurations can vary, the exact A15V product designation and current technical documentation should be verified before specifying or purchasing a pump.

4. Open-Circuit Hydraulic Pumps: A1VO, A10VO, and A11VO

Open-circuit axial piston pumps are used in hydraulic systems that power cylinders, motors, and auxiliary functions. Depending on the machine design, these functions may include lifting, digging, steering, and equipment positioning.

Bosch Rexroth A1VO Series

The A1VO family includes variable displacement pumps for applicable open-circuit systems. Depending on the configuration, load-sensing control may be available to regulate pump output in response to hydraulic demand.

Bosch Rexroth A10VO Series

The A10VO family is used in open-circuit hydraulic applications. Appropriate variants may be considered for mobile machinery and other systems requiring variable hydraulic flow.

Bosch Rexroth A11VO Series

The A11VO family is associated with high-pressure open-circuit hydraulic applications, including selected mobile machinery. Certain configurations may support additional pump drive arrangements.

When comparing these pump families, evaluate the required flow, operating pressure, control strategy, mechanical interface, and hydraulic circuit design. Similar product names do not guarantee equivalent performance or direct interchangeability.

How to Select the Right Hydraulic Pump for Mobile Equipment

Choosing the correct axial piston pump requires more than matching the brand or nominal displacement. An incorrectly specified pump may contribute to excessive heat, insufficient hydraulic speed, poor machine response, energy losses, or premature component wear.

1. Determine the Required Flow Rate and Pressure

Calculate the required flow based on actuator speed, machine cycle time, engine speed, and system demand.

Verify both continuous and intermittent pressure requirements against the pump's approved operating limits. Maximum pressure should not be treated as a continuous operating rating unless the manufacturer's documentation explicitly permits it.

2. Identify the Hydraulic Circuit Type

Determine whether the machine uses an open-circuit or closed-circuit hydraulic system.

Closed-loop travel drives typically require pump and motor combinations designed for hydrostatic transmission operation. Open-circuit work functions use a different hydraulic arrangement.

Circuit compatibility must be confirmed before selecting a replacement pump.

3. Choose the Correct Pump Control

Available control options depend on the pump family and configuration. These may include pressure compensation, load-sensing control, power control, or electrohydraulic regulation.

The correct control type helps the pump respond appropriately to changing hydraulic demand and machine operating conditions.

4. Verify Mechanical Compatibility

Check all mechanical and installation interfaces, including:

Drive shaft dimensions and spline configuration
Mounting flange standard
Rotation direction
Port arrangement and connection sizes
Overall dimensions and available installation space
Drive power and input speed requirements

A pump that looks similar to the original unit may still require a different installation arrangement.

5. Consider Hydraulic Fluid and Filtration

Hydraulic oil viscosity, operating temperature, contamination level, and filtration performance affect pump reliability.

Maintain the oil cleanliness level specified by the equipment and pump manufacturers. Contamination, inadequate lubrication, and poor inlet conditions can accelerate wear and reduce service life.

Hydraulic Pump Troubleshooting and Replacement

Reduced hydraulic performance does not automatically mean that the pump has failed internally. Before replacing a pump, inspect the entire hydraulic system and confirm the source of the problem.

Common warning signs include:

Slow cylinder or motor movement
Reduced hydraulic power
Excessive operating temperature
Unusual pump noise or vibration
Unstable pressure or flow
Contaminated hydraulic fluid
Poor response from the pump control system

A systematic inspection should include inlet conditions, fluid level, filters, pressure readings, flow measurements, and control operation.

Where appropriate, qualified technicians can perform hydraulic performance testing to distinguish internal pump wear from problems elsewhere in the system.

Replacing a pump without identifying the underlying cause may result in repeated failures. Correct diagnosis, clean hydraulic fluid, and suitable operating conditions are essential parts of a reliable repair strategy.

Hydraulic Pump Replacement Support from Hidroman

Selecting a hydraulic pump for mobile equipment requires accurate technical information and careful compatibility checks. Hidroman supports hydraulic equipment inquiries by helping identify the information required to evaluate the appropriate pump and configuration.

For a hydraulic pump replacement inquiry, prepare the following information:

Equipment manufacturer, model, and year
Existing pump nameplate and complete part number
Required flow rate and operating pressure
Open-circuit or closed-circuit system configuration
Shaft, flange, and port connection details
Hydraulic schematic or technical documentation, if available

This information helps narrow down suitable pump configurations and reduces the risk of ordering an incompatible unit.

Availability, delivery time, and supply options should be confirmed for the exact requested part number.

Contact Hidroman to discuss your mobile hydraulic pump requirements and request a technical evaluation.

Frequently Asked Questions

What is an axial piston variable displacement pump?

It is a hydraulic pump that uses axial pistons to generate pressurized fluid and can adjust its displacement to regulate hydraulic flow according to the system's requirements.

What is the difference between a Bosch Rexroth A4VG and A10VG pump?

Both families are associated with closed-loop hydrostatic applications, but their design specifications, displacement options, controls, and installation requirements may differ. Always verify the complete model and part number.

What do A4VG/35 and A4VG/40 mean?

These designations identify product family configurations within the Bosch Rexroth A4VG range. They are not complete order numbers. The full part number is needed to identify the specific displacement, control, connections, and other configuration details.

Can I replace a Bosch Rexroth hydraulic pump with another model?

A replacement must be compatible with the hydraulic circuit, flow and pressure requirements, control system, shaft, mounting flange, ports, and drive characteristics. Similar appearance or nominal displacement alone is insufficient to establish compatibility.

How can I extend hydraulic pump service life?

Use the specified hydraulic fluid, maintain proper filtration and oil cleanliness, prevent inlet restrictions, monitor operating temperatures, and investigate abnormal noise or performance changes promptly.

What information is needed to identify a replacement hydraulic pump?

The complete nameplate code is the best starting point. Equipment details, operating pressure, flow requirements, circuit type, shaft dimensions, mounting interface, and control configuration are also important.

Conclusion

Axial piston variable displacement pumps are critical components in mobile hydraulic systems. Bosch Rexroth pump families such as A4VG, A10VG, A15V, A1VO, A10VO, and A11VO serve different hydraulic circuit configurations and operating requirements.

The right selection process starts with accurate identification of the existing pump, a clear understanding of the hydraulic circuit, and verification of all technical specifications.

For mobile hydraulic pump selection and replacement inquiries, contact Hidroman to discuss your application and determine the information needed for a suitable technical solution.

For more detailed information, please visit the following link.

https://www.boschrexroth.com/tr/tr/c/mobil-makineler-icin-eksenel-piston-degisken-pompalar/

All hydraulic components required for your machine are offered to you from a single address. With 20 years of experience in hydraulic system engineering, strong collaborations with the world's distinguished brands and following new technologies in the sector, we offer you perfect and competitive solutions.

We produce special solutions for you.

Our Hydraulic System Engineers produce package solutions for you. Hydraulic Components such as Hydraulic Hose, Bent Pipe with Union, Connection Element, Pipe Clamps, Hydraulic Filters, Line Type Valves that your machine needs are determined on-site by our Engineers and all equipment suitable for your needs are listed after the necessary system calculations and offered to you as a package solution.

Our customers choose Hidroman companies due to the creativity and efficiency of our employees. We are committed to diversity, innovations, technology, and we invest in skills through training and development.

We understand you very well with our machine manufacturing experience dating back to 1950.

OUR BRANDS

We manufacture in many areas under the roof of Hidroman. We manage each product group and production groups separately to increase our service quality. For more information: www.hidroman.com.tr

As Seide Makina A.Ş., we establish Hydraulic Hose Production Lines with Fittings and Twisted Steel Drawn Pipe Production Lines with Fittings. For more information:

www.seidehydraulics.com

www.seidemachine.com

As Heben Makina, we produce mobile construction equipment with hydraulic systems.

As Hydraulic Market, we offer hydraulic equipment and services to our customers via the internet with our online sales platform in Türkiye. For more information: www.hidrolikmarket.com.tr

As Hydraulic Store, we offer hydraulic equipment and services to our customers via the internet with our online sales platform abroad.

As Pneumatic Market, we offer our customers pneumatic equipment and services over the internet with our online sales platform in Türkiye. For more information: www.pnomatikmarket.com

As Ata Hydraulic Cylinder, we manufacture hydraulic cylinders and perform hydraulic cylinder revisions.

As Hydraulic Service, we are not only there for you in case of Hydraulic System Failures and Sudden Stops, but also ensure that your hydraulic system machines operate with more efficiency with our predictive maintenance work. For more information: www.hidrolikservis.com.tr

Customer - Supplier - Employee Collaboration on Sustainability
Great marketing is a powerful tool for change. We work with the world's leading expert brands on social and environmental issues, creating work that addresses stereotypes, changes minds and encourages healthier and more sustainable consumer choices.

Our ethical standards
We aim to create a consistent culture across Hidroman companies and locations, helping our employees apply high standards and make the right decisions. Respect for human rights is a fundamental principle for Hidroman and we apply rigorous privacy and data security standards.

Hydraulic Engineering Solutions That Suit Your Needs
Meet Hydraulic Component Kits that suit your needs!

We work to speed up your manufacturing with Good Engineering solutions.

With our ready-made kits, we undertake your stock costs and assembly costs, so your valuable time is yours. We think and implement everything so that you can produce better machines.

Perfect Solutions with Our Transparent Approach
With our transparent manufacturing approach, we open the doors of every stage of our production to you. Don't waste your valuable time on hydraulic components, we work to offer you good engineering solutions. Let us do all your work on hydraulic components, focus on your work without wasting time on your machine's hydraulic system improvements.

Value Added Service
· Independent application consultancy and engineering

· Active support with the selection of suitable components considering technical and economic criteria

· Analysis and optimization of the current design and development of the new system

· On-site assembly training and hydraulic seminars

Fast Supply
Meet our flexible customer-oriented solution methods; we produce special solutions for you so that you do not have problems with supply.

Our Strengths - Your Advantages
· We make the necessary machinery and equipment investments on your behalf to increase your efficiency and performance.

· We produce extra values by reducing the total cost.

We open branches for you, at your location, specifically for you and only to serve you.

Hidroman Makes a Difference with Its Customer-Focused After-Sales Service Approach!

Hidroman, which has a 20-year history in the Hydraulic System sector, offers an after-sales service approach focused on increasing customer satisfaction with maintenance contracts that aim to reduce the operating costs of its customers and increase efficiency.

Hidroman, the innovative brand of the Hydraulic Equipment sector, continues to make a difference with its after-sales services positioned in accordance with the needs of its customers as well as the services it offers before and after sales. Hidroman, which aims to provide uninterrupted and safe services to its customers with its operations throughout Turkey and Europe, defines a perfect customer experience as product reliability and after-sales service reliability.

Hidroman, which has made being with its customers throughout the life of the product in order to create brand loyalty a part of its corporate culture, organizes the services it offers within the scope of After-Sales Services under four main headings as supervision and assembly, commissioning, maintenance-repair and original spare parts supply. Supervision service; It covers consultancy and training services on issues such as efficient hydraulic equipment selection, rules to be considered for correct product installation and connection of the pump with other installation equipment. After the installation of the device, the commissioning service is also carried out by Hidroman’s expert technical staff.

In hydraulic equipment technologies used in many different areas, malfunctions may occur over time due to operating conditions. During the 10-year life of a piece of equipment, the initial investment cost and repair expenses constitute 10-15% of its total cost, while the remaining expenses are due to energy consumption. Hidroman examines all processes from the selection of the hydraulic system to all the equipment on which the hydraulic system will operate, and offers “efficient system solutions that aim to minimize energy consumption”.

In addition, with preventive and protective maintenance agreements, it aims to reduce the risk of failure of the device, extend its life and ensure that the device operates with high efficiency and low energy consumption.

Thanks to the advantages offered by Hidroman with preventive and protective maintenance services, the budget allocated by its customers for maintenance pays for itself in a short time.

In businesses where uninterrupted service is important, Hidroman intervenes in malfunctions in a short time and minimizes damages caused by labor losses. Offering its customers a 10-year original spare part guarantee in the hydraulic systems it sells, Hidroman delivers tested original spare parts from stock in case of malfunction, shortens malfunction periods and eliminates disruptions that may occur during this period.

Hidroman After-Sales Services department stated that they offer annual maintenance services in accordance with the needs of the business. It states that their aim with maintenance services is to increase hydraulic system efficiency, ensure continuous operation of the hydraulic system and to detect, monitor and prevent possible malfunctions in operating equipment and devices by using technological measurement, control, analysis and monitoring devices.

We aim to standardize the service provided by our authorized services by inspecting them at certain intervals. In addition, we follow the calibration processes of our technical equipment in line with quality certificates. We attach importance to communication channels to be established in order to increase customer satisfaction both in sales and service. We are at the service of our customers 24/7 with our competent services that can answer the questions of our customers who buy our products by trusting our brand. In order to measure the customer satisfaction rate, we organize surveys for our customers at certain intervals through our call center. As a result of the feedback we receive, we take action quickly to meet the expectations of our customers. The nature of the products and services in the market is changing rapidly with the effect of the digital transformation we are experiencing due to technological developments. For this reason, we see the development in our products and services as a constantly living process and we continue our improvement and development works without stopping.