Concrete Pump Hydraulic Pumps and Motors | Sales, Overhaul, Spare Parts

Concrete Pump Hydraulic Pumps and Motors – High‑Performance Solutions

High‑Performance Concrete Pump Hydraulic Systems

Hydraulic systems used in concrete pump trucks must operate continuously under heavy loads. Every function—moving the boom, shuttling the concrete piston back and forth, rotating the hopper and swinging the outriggers—is driven by hydraulic pumps and motors. The right pump selection, regular maintenance and high‑quality spare parts are therefore critical to both machine safety and operational efficiency. On this page we introduce the Rexroth hydraulic pump and motor models commonly found in Putzmeister, Schwing, Cifa, Sermac, Betonstar and other concrete pump brands, and we outline our sales, overhaul and spare part services.

Open and Closed Circuits in Concrete Pump Hydraulics

A typical concrete pump has several hydraulic pumps. The closed‑circuit main pump provides the high pressure and large flow rate needed to drive the main concrete piston forward and backward. Open‑circuit pumps feed auxiliary functions such as boom motions, outriggers (stabilisers), mixer rotation and water pumps. Pumps in these circuits are built for high pressure and long life; with proper oil filtration they will work reliably for years.

A4VG Series – Closed‑Circuit Main Pumps

The Rexroth A4VG series is the most widely used variable‑displacement closed‑circuit axial piston pump in concrete pump main drives. A swashplate mechanism adjusts the displacement according to engine speed and swashplate angle, allowing the operator to control material flow precisely. A4VG pumps stand out for several reasons:

Integrated charge pump and pilot oil circuit maintain boost pressure in the closed loop, ensuring safe operation at high speed and high outlet pressure.【14†L163-L170】
Smooth flow reversal through the neutral position of the swashplate keeps the concrete pistons perfectly synchronised.
High pressure capability: nominal ratings of 400–450 bar, with peak pressure up to 500 bar. These pumps can handle the toughest concrete pump applications.
Wide displacement range: from 40 cc to 280 cc per revolution. The most common models in concrete pumps are A4VG125, A4VG145, A4VG180 and A4VG110.

You will find A4VG pumps as the primary pump in machines like the Putzmeister BSF 36‑4, 42‑5 and 52‑5, Schwing S39SX and S46SX, Cifa K36 and K42, Sermac 5Z36 and 5Z42, and Betonstar 38 m and 42 m booms. We stock both new and reconditioned units; every overhauled pump is tested on our hydraulic bench before shipment.

A10VO and A10VSO Series – Open‑Circuit Auxiliary Pumps

For auxiliary circuits where variable flow is required, the Rexroth A10VO and A10VSO series are widely used. These medium‑pressure pumps are typically rated for 280 bar continuous pressure, with peaks up to 350 bar【12†L292-L300】. Key features include:

Swashplate design allows flow to be controlled by shaft speed and plate angle; operators can precisely regulate outriggers and boom movements.
High efficiency and quiet operation: A10V pumps are renowned for their efficiency and reduce overall noise in the hydraulic system【12†L278-L285】.
Models such as A10VO28, A10VO45, A10VO60, A10VO71, A10VO85 and A10VO100 are common in Putzmeister Elephant series, Schwing outriggers and mixer drives, and other auxiliary circuits. The A10VSO pumps are frequently used in industrial concrete batching plants for pressure and flow control【12†L292-L300】.

These pumps power boom extension/retraction, outrigger deployment, water pumps and concrete mixer drives on many machines. We carry original Rexroth A10VO/A10VSO pumps and refurbished units, and we provide repair services.

A7V Series – Bent‑Axis High‑Pressure Pumps

The Rexroth A7V series consists of bent‑axis axial piston pumps designed for very high pressures. They deliver the power needed for heavy‑duty functions in concrete pump hydraulics. Highlights include:

High power density and robust construction: A7V pumps produce 350 bar nominal and up to 450 bar maximum pressure in a compact package.
Wide displacement range: typical models include A7V28, A7V55, A7V80 and A7V107. In particular, A7V80 pumps are commonly used to drive Putzmeister and Schwing boom circuits, while A7V28 pumps can be found in smaller concrete pumps and mixer drives.
Adjustable swashplate: the displacement can be changed to provide high torque at low speed or high speed at low torque. This flexibility allows the pump to adapt to varying working conditions.

We supply new and remanufactured A7V pumps and offer rebuild and testing services for this series.

A2FO/A2F Series – Fixed‑Displacement Pumps and Motors

The A2FO (or A2F) series of Rexroth pumps and motors provide a fixed displacement option for concrete pump circuits. Built with a bent‑axis layout, these units deliver constant flow and are simple, reliable and capable of very high pressures.

High pressure capability: A2FO pumps are rated for 400 bar continuous and 450 bar peak pressure【23†L173-L181】, making them suitable for water pumps and other high‑pressure circuits.
Compact and long‑life design: the 30°–40° bent‑axis piston group provides high power in a short installation length【23†L173-L181】. Displacements range from 5 cc up to about 130 cc per revolution.
Typical applications: In Putzmeister concrete pumps, models such as A2F016/61L, A2F023/61L and A2F032 drive water pumps and auxiliary functions; similar models are used in Cifa and Schwing machines.

Hydraulic Motors and Other Components

Concrete pump systems also incorporate hydraulic motors where low speed and high torque are required. Models like BRHL 750, BRHL 470, BP500 and OMP160 are used on Putzmeister and Schwing mixer drives. We also supply adapter flanges, pump shafts, motor repair kits, pump housings, main pump seal kits and other parts. All components are available as new or refurbished, and we can source the right part number for your machine.

Concrete Pump Hydraulic Pump and Motor Codes Table

Below is a table of the Rexroth hydraulic pump and motor codes most commonly used in concrete pump machines. Each row lists the model name, a brief description, typical machine applications and compatible brands. If you need a code that is not listed here, please contact us; we supply hundreds of different codes.

Pump/Motor Model	Description & Technical Features	Typical Machine Applications	Compatible Brands
A4VG125, A4VG145, A4VG180, A4VG110	Variable‑displacement closed‑circuit pumps; integrated charge pump; 400–500 bar pressure rating; displacement options from 125 cc to 180 cc.	Main pump drive for concrete pistons; material pumping.	Putzmeister BSF 36‑4, 42‑5, 52‑5; Schwing S39SX, S46SX; Cifa K36, K42; Sermac 5Z36, 5Z42; Betonstar 38 m and 42 m booms.
A10VO28, A10VO45, A10VO60, A10VO71, A10VO85, A10VO100	Medium‑pressure (280 bar) variable‑displacement open‑circuit pumps; swashplate design; flow adjustable; low noise and high efficiency.	Outrigger stabilisers, boom motion, mixer drive, water pump.	Putzmeister Elephant series; Schwing concrete pumps; Cifa and Sermac boom controls; Betonstar machines.
A7V28, A7V55, A7V80, A7V107	Bent‑axis high‑pressure piston pumps; capable of 350–450 bar; compact with high power density.	Boom drive and other high‑pressure auxiliary circuits.	Putzmeister and Schwing boom drives; Sermac and Cifa mobile concrete pumps.
A2F016/61L, A2F023/61L, A2F032, A2F045, A2F060	Fixed‑displacement bent‑axis pumps/motors; 400 bar nominal pressure; simple, compact design.	Water pump, mixer drive or secondary circuits.	Putzmeister, Schwing, Cifa, Sermac, Betonstar concrete pumps.
BRHL 750, BRHL 470, BP500, OMP160	Hydraulic motors designed for low speed/high torque; used in mixer and rotation circuits.	Concrete mixer drive, drum rotation and water pump drive.	Putzmeister, Schwing, Sermac, Cifa, Zoomlion.
58010242, 58010244	OEM part numbers for Putzmeister and Schwing concrete pumps; correspond to A7V or A10VO pump variants (e.g. A7V80 R).	Main pump or auxiliary pump replacement.	Putzmeister concrete pump spare parts.

This table is illustrative and includes the most commonly requested models. In addition to Rexroth, we also stock Kawasaki, Danfoss, Linde, Parker and other brands of hydraulic pumps for concrete pumps. If you are looking for a specific part number or pump/motor model, please contact us via phone or WhatsApp.

Sales, Repair and Spare Part Services

Sales and Inventory Support: We sell new and overhauled hydraulic pumps for concrete pumps. Our warehouse stocks hundreds of popular part numbers so you don’t have to wait. Refurbished pumps are rebuilt with new bearings and seals and tested on our bench before delivery.

Technical Service and Overhauls: Concrete pump pumps operate at extreme pressure and can develop internal wear over time. Our technicians overhaul A4VG, A10VO, A7V and A2F pumps, replacing shafts, piston groups, plates, valves and seals as needed, and testing each unit to factory specifications.

Spare Parts and Accessories: We supply pump shafts, adapter flanges, seal kits, water pump housings, motor repair kits and other genuine and aftermarket parts for your hydraulic systems. We can cross‑reference original codes for Putzmeister, Schwing, Cifa, Sermac, Betonstar and other brands.

Consulting and Technical Support: If you are unsure which pump suits your machine, our technical team can help you choose the right model based on your application. Contact us via WhatsApp or email for any questions about concrete pump hydraulics.

Conclusion

Selecting the right hydraulic pump and motor for your concrete pump is critical to machine performance and safety. In this article we explored the roles of Rexroth A4VG, A10VO/A10VSO, A7V and A2F series pumps in concrete pump applications, detailing their technical features, typical uses and compatible models. We also presented our range of hydraulic motors and spare parts. Our company is your reliable partner for the supply, repair and servicing of concrete pump hydraulic pumps and motors. Contact us for any model code or technical support you need.