Rexroth Core Series Part I: Piston Pump Types and Why They Matter
Note on this series: This is the first in our Rexroth Core Series, spotlighting high-demand Rexroth components and how Hydraulic Parts Source (HPS) supports distributors, rebuilders, and service teams through core purchasing and supply. In Part 1, we’re diving into Rexroth piston pumps, including popular models like the A4V, A6, A10V, and SYDFE. Stay tuned for Part 2, where we’ll cover motors like the A2F and directional control valves (DCVs) such as the 4WE6 and 4WE10. In Part 3, we’ll go deeper into our in-house repair capabilities for Rexroth piston pumps, and servicing models like the A4V, A6, and SYDFE.
When it comes to sourcing hydraulic cores for repair or remanufacturing, few names carry the weight of Rexroth. Known for their unmatched engineering and reliability, Rexroth piston pumps are a staple in demanding mobile and industrial applications.
Rexroth is known for its high productivity, adaptable components, and high precision.
Due to growing demand, Hydraulics Parts Source not only offers Bosch-Rexroth’s popular A10VSO series piston pumps, but repair services on Proportional valves, and the SYDFEE series using the A10VSO DFEE proportional controls.
In this article, we’re breaking down some of the most requested models in the piston pump family — A4V, A6, A10V, and SYDFE — to help you understand what they are, how they work, and why professionals seek them out again and again.
We’ll explore what makes these pumps so effective in the field — and why HPS remains a trusted source for cores.
A4V Series – High-Pressure Workhorse
The Rexroth A4V series is a variable axial piston pump designed for open or closed circuit applications, often found in mobile and industrial hydraulics. With swashplate design and pressure-flow control capabilities, these pumps are optimized for high-pressure systems and are known for their durability in rugged environments.Why it's popular:
- Handles pressures up to 400 bar
- Excellent for construction, marine, and heavy machinery
- Reliable operation in demanding conditions
- Known for long service life and consistent performance
When customers seek A4V cores, it's typically to maintain or rebuild high-performance hydraulic systems that cannot afford downtime.
A6 Series – Compact and Powerful
The Rexroth A6 series includes pumps like the A6VM and A6VE—variable displacement axial piston motors with bent-axis design, often used in closed circuit applications. They’re designed for high speeds and compact spaces, making them ideal for mobile applications like agricultural or forestry equipment.Why it's popular:
- High speed capability
- Compact bent-axis design
- Smooth operation with low noise
- Ideal for hydrostatic travel drives and winches
A10V Series – Versatile and Dependable
The A10V series is one of Rexroth’s most versatile axial piston pump lines. Used in open circuit applications, the A10V is common in mobile and industrial equipment where responsive control and reliability are required.This series includes the popular A10VSO and A10VO models and offers several displacements and configurations.
Why it's popular:- Wide displacement range (10 to 140 cc)
- Proven in agriculture, construction, and industrial systems
- Simple to service and rebuild
- Cost-effective and widely supported in the market
SYDFE – Electro-Hydraulic Precision
The SYDFE system is not a pump itself but a modular electro-hydraulic pump control system that uses a variable displacement axial piston pump like an A4V, combined with electronic controls for highly dynamic and energy-efficient performance.Why it's popular:
- Delivers energy savings and precise pressure/flow control
- Integrates with servo drives for closed-loop feedback
- Reduces heat generation and increases efficiency
- Ideal for presses, plastics, and other industrial automation systems
Why Rexroth Piston Pump Cores Are in Demand
Rexroth piston pumps are known for their engineering precision, robust construction, and long lifespan, but even the best pumps eventually need service or replacement.For repair shops, remanufacturers, and distributors, Rexroth cores are a valuable resource. They allow for:
- Cost-effective rebuilds
- Reliable replacements
- Faster turnaround times for customers
- Sustainability through remanufacturing
Whether you're stocking cores for rebuilds or trying to make smart purchasing decisions, knowing the strengths of each pump gives you an edge in the hydraulic market.
Hydraulic Parts Source is a leading fluid power remanufacturer, and we’re ready to serve you. Contact us today to experience OE quality for a fraction of the time and cost by calling (866) 985-6370 or get a quote by emailing sales@hydparts.com.