Rexroth A10VO 32 series A10VO100 axial piston hydraulic pump

The A10VO is a swashplate-design, variable-displacement axial piston pump built by Bosch Rexroth for open hydraulic circuits. It's designed for hydrostatic transmissions, where flow is proportional to drive speed and displacement, and adjusting the swashplate angle allows flow to be varied smoothly. In plain terms: instead of pushing a fixed amount of oil per revolution, like a gear pump, the A10VO adjusts how much oil it delivers on the fly based on the angle of an internal swashplate. That's what lets a single pump match output to load demand instead of wasting energy (and generating heat) by dumping excess flow over a relief valve.

The "100" in A10VO100 refers to the displacement size. Within the A10VO family, displacement sizes span 28, 45, 71, 100, and 140 cm³/rev (1.71 to 8.54 in³/rev), so the 100-size sits toward the larger end — suited for machines that need more flow at a given speed than the smaller 28, 45, or 71 frames can deliver.

How the A10VO100 Works

Inside the housing, a cylinder barrel holds a set of pistons arranged parallel to the drive shaft — hence "axial piston." As the shaft rotates, the pistons ride against the angled swashplate, which forces them in and out of their bores. That reciprocating motion draws hydraulic fluid in on one stroke and pushes it out under pressure on the next.

The genius of the variable-displacement design is that the swashplate angle isn't fixed. A control mechanism — hydraulic, mechanical, or electro-hydraulic depending on the variant ordered — tilts the swashplate to increase or decrease piston stroke length in real time. Steeper angle, longer stroke, more flow per revolution. Flatten the angle toward zero, and flow drops toward nothing even while the shaft keeps turning.

Pressure and Flow Control Options

The A10VO100 is available with several control types, and picking the right one matters as much as picking the right displacement size:

DR (pressure control): limits maximum system pressure by de-stroking the pump automatically once a set pressure is reached, protecting the circuit without a separate relief valve doing all the work.

DFR / DFR1 (pressure-flow control): combines flow control with a pressure override. On this control type, pressure control takes priority over flow control, and the DFR1 variant has no connection between the X-port and tank.

ED / ER (electro-hydraulic pressure control): lets an electrical signal set the target pressure electronically, which is common on machines with electronic load-sensing or CAN-bus control systems. In the ED version, the valve is set to a specific pressure by a variable solenoid current, and as load pressure changes, the pump's swivel angle adjusts to hold that electrically set pressure — meaning the pump only delivers as much fluid as the connected consumers actually need.

HD (hydraulic displacement control): allows remote or manual displacement adjustment via a separate control signal.

Pressure Ratings

The A10VO series is rated for a nominal pressure of 4000 psi (280 bar), with a peak pressure rating of 5100 psi (350 bar). Those figures apply across the family, including the 100-size frame, though exact continuous-duty limits can shift slightly by control type and mounting configuration — always confirm against the current datasheet for your specific model code before finalizing a system design.

Installation and Maintenance Considerations

Combination and Tandem Mounting

The A10VO family is often paired in tandem or combination setups to run two independent hydraulic circuits off a single input shaft. Combination pumps let you achieve mutually independent hydraulic circuits without a splitter gearbox, and when ordering them, the model codes for the front and rear pump are joined with a "+" — for example, A10VO85DFR1/52R-VSC12K04 + A10VO45DR/52R-VSC11N00. It's also permissible to tandem-mount two single pumps of the same size without an additional support bracket, provided mass acceleration stays under about 10 g. That last point matters more than it sounds — skip the bracket on a heavier or higher-vibration application and you risk fatigue failure at the mounting flange over time.

Handling and Storage

Don't underestimate the transport and pre-commissioning steps. If you need to run the pump without a second unit on the through-drive, the spacer and hub must be removed, and since the standard metallic protective cover isn't pressure-rated, it has to be swapped for a pressure-resistant cover before startup. Skipping this is a surprisingly common field mistake that ends in a blown cover and a fluid spray under pressure.

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Specifications

Selection Table

Q1: Can I tandem-mount two A10VO100 pumps?

A1:Yes, tandem or combination mounting is supported and commonly specified for machines needing two independent circuits from one input shaft. Follow Rexroth's mass-acceleration and bracket guidance for your specific configuration rather than assuming a bracket-free setup is always fine.

Q2: What's the difference between DR, DFR, and ED control types?

A2: DR is straightforward pressure control (de-strokes the pump at a set max pressure). DFR adds flow control with pressure override priority. ED and ER are electro-hydraulic variants that let an electrical signal — rather than a purely hydraulic/mechanical linkage — set the target pressure, which is useful for electronically managed systems like fan drives.

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.