Bosch Rexroth A11VO60 open-circuit axial piston hydraulic pump

The A11VO60 is a variable-displacement axial piston pump of swashplate design, built for open-circuit hydrostatic drives. It belongs to Bosch Rexroth's A11VO series (sizes range from 40 to 260 cc/rev), with the "60" designating a maximum displacement of roughly 60 cc per revolution.

Technical Specifications

Control Options: Matching the Pump to the Application

One of the defining strengths of the A11VO60 is the sheer range of displacement control options Rexroth offers on the same base pump. This is where the ordering code (the long alphanumeric string like `A11VO60DRS/10R-NSC12N00`) really matters — it tells you exactly which control variant you have.

DR — Pressure Compensator Control

The pump automatically reduces displacement as system pressure approaches a set value, protecting the system from overpressure while maximizing available flow at lower pressures. This is the workhorse control for load-sensing-adjacent applications where a simple pressure cutoff is sufficient.

EP — Electric Proportional Control

A proportional solenoid adjusts swashplate angle in response to an electrical current signal, allowing an electronic controller (or operator input via joystick) to command displacement directly. Common on machines with electrohydraulic control architectures.

LR — Load-Sensing Control

The pump adjusts displacement to match actual downstream flow demand, sensed via a load-sensing line from the directional valve. This minimizes throttling losses and improves fuel efficiency compared to constant-flow or simple pressure-compensated systems.

Combination and Remote Controls

Rexroth also offers combined controls (e.g., load-sensing plus power limitation) and remote-pressure-adjustable variants, letting OEMs fine-tune behavior for specific duty cycles without redesigning the hydraulic architecture.

Installation and Operating Considerations

Fluid Cleanliness Is Non-Negotiable

Axial piston pumps run tight tolerances between pistons, barrel, and valve plate. Contamination is the single largest driver of premature wear in units like the A11VO60. Rexroth specifies a minimum cleanliness level of ISO 4406 20/18/15 — in practice, most well-run fleets target tighter than that, especially on machines with long service intervals.

Priming and Cavitation

The A11VO60 is self-priming, but inlet conditions still matter. Long or restrictive suction lines, undersized tank ports, or high fluid viscosity at cold start can starve the pump and cause cavitation — a leading cause of pitted pistons and scored barrels. On applications with high shaft speeds or challenging inlet geometry, the built-in charge pump (impeller) option, available on the A11VLO variant, is worth specifying.

Through-Drive Loading

Because the through drive supports mounting additional pumps up to 100% of nominal size, it's tempting to stack multiple functions onto one prime mover output. Just remember: the through-drive rating is a mechanical torque/power limit, not a suggestion — exceeding it shortens bearing and shaft life across the whole stack.

Temperature Management

Standard operation is rated for -25°C to +115°C fluid temperature. Cold starts below -25°C demand special measures (pre-warming, low-viscosity fluid, staged startup) to avoid starving internal lubrication before the oil warms. Sustained operation above 115°C accelerates seal degradation and oil oxidation regardless of what the pump itself can mechanically tolerate.

For more information on the A11VO60 hydraulic pump, please visit https://www.baolilaihydraulic.com/.

Specifications

Selection Table

Q1: Can the A11VO60 be used in a closed-loop circuit?

A1: No. The A11VO60 is purpose-built for open-circuit operation, drawing from and returning to a reservoir. For closed-loop hydrostatic drives, Rexroth's A4VG or similar closed-circuit pump families are the appropriate choice.

Q2: How often should the pump be serviced?

A2: There's no universal interval — it depends on duty cycle, fluid cleanliness, and operating environment. Most fleets tie pump inspection to fluid analysis results and case-drain flow trending rather than a fixed calendar schedule, catching wear trends before they become failures.

Q3: How to purchase an A11VO60 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 A11VO60 hydraulic pump?

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