Bosch Rexroth A10VO swashplate hydraulic pump for the Volvo Engineering Equipment 11096983 11116948 11172711 11173952 11707191 15079526 17458121

The A10VO is an axial piston variable-displacement pump with a swashplate design, made by Bosch Rexroth for open-circuit hydraulic systems. In plain terms, it's a pump whose output flow can be adjusted on the fly — without changing engine speed — by tilting an internal swashplate that changes the stroke length of the pistons inside the pump.

The pump is available in displacement sizes ranging from roughly 45 to 180 cubic centimeters, with a nominal pressure rating of 280 bar and a maximum pressure rating of 350 bar, depending on the series and configuration. Flow output is proportional to drive speed and displacement, and you can smoothly adjust it by changing the swashplate angle. Rexroth builds the pump with two case drain ports, strong suction characteristics, low operating noise, and a favorable power-to-weight ratio compared to older gear-pump designs — all traits that matter a lot in mobile equipment where space and weight are always at a premium.

Why Volvo Uses the A10VO in Its Equipment Lineup

Volvo Construction Equipment doesn't manufacture its own hydraulic pumps for most models; instead, it sources proven, high-volume components from established hydraulics suppliers and integrates them into machine-specific circuits. The A10VO family fits that role well for a few concrete reasons.

Reliability at High Duty Cycles

Excavators and loaders run their hydraulic pumps continuously for entire shifts, often at high load. The A10VO series is built with a mounting flange to SAE J744 and flanged ports to SAE J518 standards, has good suction characteristics, allows axial and radial loading of the drive shaft, and offers a long service life — all of which matter on a machine that may run 2,000+ hours a year.

Compact Packaging Around the Engine Bay

Volvo's excavator and wheel loader engine bays are tightly packaged, especially on Tier 4 Final and Stage V machines where emissions equipment competes for space with the pump drivetrain. Rexroth notes that later A10VO variants were engineered to be lightweight and compact, needing the same installation space as earlier series while handling higher pressures — a useful trait for OEMs retrofitting newer engines into existing chassis designs.

Multi-Purpose Use Beyond the Main Circuit

The A10VO isn't only a working-hydraulics pump. It's suited to steering drives, hydrostatic fan drives, and general working hydraulics, which is why you'll find A10VO or closely related A10VNO variants driving the cooling fan on some Volvo diesel platforms, in addition to the main implement circuit on the excavator or loader itself.

Where the A10VO Fits in a Volvo Hydraulic Circuit

Example: Excavator Boom, Arm, and Bucket Functions

On a mid-size Volvo excavator, the A10VO (or a tandem pump built from two A10VO-family sections) sits directly behind the engine, driven off the flywheel housing. As the operator moves the joysticks, a load-sensing signal travels back to the pump's DFR-style controller, which adjusts swashplate angle to deliver exactly the flow the active function needs — whether that's a fast, low-pressure bucket curl or a slow, high-pressure lift at full boom extension.

Example: Constant Fan and Steering Support

Smaller-displacement A10VO units are frequently paired with the main pump to handle secondary loads. In many Volvo dump truck and excavator applications, a compact A10VO (commonly in the 28–45 cc range) drives the hydrostatic fan or supports the steering circuit independently of the main working pump, so a cooling-fan fault doesn't rob flow from the boom and arm.

Example: Wheel Loader Steering and Implement Sharing

On Volvo wheel loaders, variable A10VO-type pumps are often set up to prioritize steering hydraulics under load-sensing logic, then release excess flow to the loader arm and bucket circuits once steering demand is satisfied — a strategy that keeps the machine controllable even during simultaneous steering and lift operations.

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Q1: Does a whining pump always mean pump failure?

A1: Not necessarily. Suction-side problems — a restricted strainer, low reservoir level, or a collapsed suction hose — are common causes of pump noise and should be ruled out before assuming the rotating group itself is damaged.

Q2: Where can I find the exact replacement part number?

A2: Cross-reference the full type code stamped on the original pump's nameplate against Volvo's parts catalog or a Rexroth mobile hydraulics distributor — the type code, not just the "A10VO" family name, determines fit and function.

Q3: What is the price and delivery time of the A10VO hydraulic pump for Volvo Engineering Equipment?

A3: The specific price and delivery time will depend on the equipment model or specific product model you provide.

Q4: How to purchase an A10VO hydraulic pump for Volvo Engineering Equipment?

A4: Visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.