Unlike Komatsu (HPV) or CAT (SBS) pumps that are built exclusively for their own machines, Bosch Rexroth's A4VG and A10V series are true multi-brand components. Liebherr specifies them as OEM. Hitachi fits them as alternatives. Volvo EC-series uses them. Sany and XCMG excavators from China increasingly use Rexroth as their premium-spec option. This cross-compatibility makes a refurbished Rexroth A4VG71 one of the most versatile investments in excavator hydraulics — it may well fit your next machine too.
Which Excavator Brands Use Rexroth Pumps?
This cross-reference covers OEM-fitted and widely-accepted alternative Rexroth pumps for popular excavator brands in India's market:
Always confirm shaft configuration and port type with us before ordering — variants exist within model families.
The A4VG Series — Why Variable Displacement Matters for Excavators
What "Variable" Means in Practice
The A4VG is a variable-displacement pump — it adjusts output automatically based on what the excavator's hydraulic system demands at any moment. During light work (repositioning, slow travel), it reduces output to save energy. During heavy digging, it maxes out. This is why Rexroth A4VG-equipped excavators run cooler and consume less fuel than fixed-displacement alternatives.
What We Check in the A4VG During Refurbishment
The variable displacement mechanism (swashplate angle, control piston, servo valve) is fully inspected and adjusted in every A4VG refurbishment — not just the hydraulic components. A pump with a sticking servo valve will not respond correctly to load changes even if the pressure output is adequate. We test dynamic response as well as peak pressure.
Rexroth Excavator Pump Models Available
| Pump Model | Max Pressure | Displacement | Common Application |
|---|---|---|---|
| A4VG56 | 400 bar | 56 cc/rev | Mini excavators, light duty |
| A4VG71 | 400 bar | 71 cc/rev | 20-25T excavators — most common |
| A4VG180 | 400 bar | 180 cc/rev | Large excavators 35T+, cranes |
| A10VO28 | 280 bar | 28 cc/rev | JCB JS, Volvo EC small series |
| A10VO45 | 280 bar | 45 cc/rev | Volvo EC210/EC220, JCB JS220 |
| A10VO71 | 280 bar | 71 cc/rev | Volvo EC290/EC300 |
Why Contractors Choose Rexroth for Excavators
One Pump, Many Machines
If you run a mixed fleet — Liebherr, Volvo, Sany — the A4VG71 likely fits all of them. Standardising on a Rexroth refurbished unit reduces the number of spare pump types you need to carry.
400 Bar — Highest in Class
The A4VG series is rated to 400 bar — higher than most competitor designs. This headroom means the pump operates well within its limits in typical excavator use (250-350 bar systems), contributing to longer service life.
German OEM Seal Kits
We use genuine Bosch Rexroth seal kits in every A4VG refurbishment. These seals are designed for the specific pressure ratings and hydraulic fluid compatibility of Rexroth pumps — not a generic substitute.
Dynamic + Static Test Report
Unlike static pressure tests, we also verify the A4VG's servo response (control system) under varying load conditions. Both results appear in your written test report — a more complete picture of pump health.