Rexroth 52 and 53 series A10VO axial piston pump A10VO100 hydraulic pump

The A10VO is a variable-displacement axial piston pump built by Bosch Rexroth for open-circuit hydraulic systems. "Open circuit" means the pump draws fluid from a reservoir/tank and discharges it to the system, with return flow going back to the same tank — as opposed to a closed-circuit pump (like the A10VG) that's typically paired with a hydraulic motor in a self-contained loop.

The pump uses a swashplate design: pistons arranged radially around a rotating cylinder block are driven in and out by the angle of an adjustable swashplate. Tilt that swashplate more, and each piston travels farther per revolution, increasing displacement and flow. Bring it back toward neutral, and displacement drops. This is what makes the A10VO a variable pump rather than a fixed-displacement unit — flow output can be matched to the load in real time instead of being wastefully dumped over a relief valve.

A10VO100: Specifications and What They Mean in Practice

The A10VO series spans frame sizes from NG10 up through NG100 (where "NG" refers to nominal size, roughly corresponding to displacement). The A10VO100 sits at the top of that range.

Core specs for the A10VO series 52/53 line (A10VO100 included):

Displacement range across the series: 10 cm³ to 100 cm³ per revolution

A10VO100 displacement (Vg max): approximately 100 cm³/rev

Nominal pressure: 250 bar (3,600 psi)

Maximum pressure: 315 bar (4,550 psi)

Circuit type: Open circuit

Flow behavior: Proportional to drive speed and displacement; infinitely variable via swashplate angle

Fluid compatibility: HLP mineral oils per DIN 51524, with defined cleanliness requirements (ISO 4406 20/18/15 as a baseline, tightening to 19/17/14 for lowviscosity/hightemperature operation)

What "100" Actually Tells You

The "100" in A10VO100 refers to the maximum geometric displacement in cubic centimeters per revolution — it is not a pressure rating, horsepower figure, or frame bolt pattern number, though people confuse all three when searching for parts. At a given input speed, a larger displacement number means more theoretical flow output. A pump running at 1,800 rpm with 100 cm³/rev displacement produces more flow than a 45 cm³/rev unit at the same speed — which is exactly why frame size selection is one of the first calculations in any hydraulic circuit design, long before you start picking control valves.

Control Options You'll See on an A10VO100

The A10VO100 is available with a range of control types, and this is where model codes get long:

DR — Pressure control (limits max system pressure)

DFR — Pressure and flow control combined

DRG — Load-sensing pressure and flow control

EO / ER / ED — Electrohydraulic and electroproportional pressure/swivel angle controls

LR / LRDR — Power control variants, sometimes combined with pressure control

Each control type changes how the pump responds to load changes — a pressure-compensated (DR) pump behaves very differently under a stalled cylinder than a load-sensing (DRG) unit feeding a proportional valve bank. Getting this wrong isn't just an inefficiency issue; it can cause instability, hunting, or heat generation in the circuit.

Installation and Maintenance Considerations

A few things experienced hydraulic technicians flag consistently with A10VOseries pumps:

Fluid cleanliness is nonnegotiable. The tight tolerances in the piston/cylinder block assembly are unforgiving of contamination. Filtration to the specified ISO 4406 cleanliness class isn't a suggestion — it's the single biggest lever on service life.

Case drain matters. The case drain line must be able to flow freely back to the tank below the fluid level, with minimal backpressure, or shaft seals fail prematurely.

Throughdrive capability. Many A10VO units support a throughdrive shaft, letting a second pump (of equal or smaller nominal size) mount in tandem. This is common in machines that need independent circuits — steering and implement hydraulics, for example — without a separate splitter gearbox.

Startup priming. On initial startup or after a fluid change, the pump housing should be prefilled, and air bled from the system before running under load; axial piston pumps have limited self-priming ability, and dry running for even a short period can score internal components.

Viscosity and temperature limits. Cold starts matter — running the pump before the fluid reaches a workable viscosity is one of the more common (and avoidable) causes of premature wear.

For more information on the A10VO100 hydraulic pump, please visit https://www.baolilaihydraulic.com/product/.

Specifications

Selection Table

Q1: What does A10VO100 mean on a Rexroth pump nameplate?

A1: It identifies the pump as part of the A10VO family (open-circuit, swashplate, variable-displacement axial piston pump) with a maximum geometric displacement of 100 cm³ per revolution. The full type code on the nameplate will also specify series (52 or 53), control type, shaft, seal material, and port configuration.

Q2: How do I identify the correct control type for a replacement pump?

A2: Read the full model/ordering code off the existing pump's nameplate — control type (DR, DFR, DRG, EO, ED, etc.) is embedded in that code. If the nameplate is illegible, the machine's hydraulic schematic or OEM parts catalog will specify it; guessing based on symptoms alone risks ordering an incompatible control housing.

Q3: How to purchase an A10VO100 hydraulic pump?

A3: You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.

Q4: What is the price and delivery time of the A10VO100 hydraulic pump?

A4: The specific price and delivery time will be provided based on the specific model you provide.