PI 037-15 Lohr am Main, 2015-09-14

Additional size for axial piston variable pump A1VO

The new size 28 is externally identical in design to the size 18 and offers a high power density in the smallest of spaces.

High power density for compact installation spaces

  • Compact design for the tightest of installation spaces
  • Easy to install connections – positioned laterally or to the rear
  • Additional, space-optimized charge pump available on request

For tractors in the power class of between 37 and 66 kW (50-90 hp), manufacturers are focusing increasingly on high-performance, energy-efficient axial piston variable pumps as a technological alternative to fixed displacement units with external gear pumps. With the third size in the A1VO axial piston pump series – size 28 – Rexroth will offer an even finer gradation for application-oriented, easy to install solutions in these vehicles.

The new variant increases the scalability of the A1VO series, which Rexroth already offers in sizes 18 and 35. Despite the cube number of 28 ccm, the new size shares the same compact housing as the already existing size 18. It can therefore be compactly installed in the tightest of installation spaces. The connections, which are optionally positioned laterally or to the rear, are easily accessible and make installation particularly easy. On request, Rexroth will also factory-equip both variants NG 28 and NG 35 with an additional space-optimized charge pump for the shared oil circuit.

The expanded A1VO portfolio is primarily suitable for compact tractors with power outputs of up to 66 kW (90 hp). The variable pumps supply different functions of the working hydraulics, such as the hitch control or the steering. Even in hydrostatic fan drives of larger agricultural vehicles, the demand-controlled power generation ensures low fuel consumption and thus low exhaust emissions.

At a nominal pressure of 250 bar and a maximum pressure of 280 bar, the A1VO size 28 provides a high power density in a compact installation space and achieves an efficiency of nearly 90 percent. The high permissible self-priming speeds further complement this power comparison. Adjusting the cradle decouples the speed of the diesel engine from the pump power and produces the flow, according to the actual need. On the new size 28, the speed in continuous operation and at maximum swivel angle has been set to 3,200 rpm. As a result, the A1VO size 28 covers an even wider performance range.

Economical, precise, safe, and energy efficient: drive and control technology from Bosch Rexroth moves machines and systems of any size. The company bundles global application experience in the market segments of Mobile Applications, Machinery Applications and Engineering, Factory Automation, and Renewable Energies to develop innovative components as well as tailored system solutions and services. Bosch Rexroth offers its customers hydraulics, electric drives and controls, gear technology, and linear motion and assembly technology all from one source. With locations in over 80 countries, more than 33,700 associates generated sales revenue of approximately 5.6 billion euros in 2014.

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The Bosch Group is a leading global supplier of technology and services. It employs roughly 360,000 associates worldwide (as per April 1, 2015). The company generated sales of 49 billion euros in 2014.* Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiary and regional companies in some 60 countries. Including its sales and service partners, Bosch is represented in roughly 150 countries. This worldwide development, manufacturing, and sales network is the foundation for further growth. In 2014, Bosch applied for some 4,600 patents worldwide. The Bosch Group’s strategic objective is to create solutions for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.”

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*The sales figure disclosed for 2014 does not include the former joint ventures BSH Bosch und Siemens Hausgeräte GmbH (now BSH Hausgeräte GmbH) and ZF Lenksysteme GmbH (now Robert Bosch Automotive Steering GmbH), which have since been taken over completely.


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Susanne Herzlieb
Maria-Theresien-Straße 23
97816 Lohr am Main
Phone: +49 9352 18-1573

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