Rexroth AA2FLO Open circuit fixed hydraulic pump

The AA2FLO is a fixed-displacement axial piston pump designed specifically for open circuit hydraulic systems. Unlike variable displacement pumps that adjust flow based on demand, the AA2FLO delivers a constant flow per revolution—making it ideal for applications where steady, predictable output is critical.

Key Design Features

-Axial Piston Configuration: The pistons are arranged parallel to the drive shaft, rotating around a swashplate angle. This design minimizes pulsation and ensures smooth fluid delivery.

-Open Circuit Compatibility: Designed to draw fluid from a reservoir and return it after use, making it suitable for standard hydraulic circuits without closed-loop complexity.

-Fixed Displacement: Once installed, the displacement (measured in cm³/rev) is set. Common sizes range from 28 cm³ up to 200 cm³ per revolution, depending on the specific model variant.

Primary Applications

This pump isn't a one-size-fits-all solution—it’s purpose-built for environments where simplicity and durability outweigh the need for variable control.

Mobile Equipment

-Agricultural Machinery: Tractors, harvesters, and sprayers often rely on the AA2FLO for auxiliary functions like fan drives or conveyor belts.

-Construction Vehicles: Excavators and skid-steer loaders use it for cooling fans or secondary implement circuits.

Industrial Hydraulics

-Machine Tools: Constant coolant or lubrication flow in CNC machines.

-Press Systems: Reliable clamping force generation where flow consistency is non-negotiable.

Marine & Offshore

-Winch Drives: Steady tension control in mooring systems.

-Deck Machinery: Hydraulic cranes requiring predictable lifting speeds.

Common Failure Modes and How to Avoid Them

No pump is invincible, but knowing the weak points keeps your system running longer.

Cavitation

-Cause: Starved inlet due to clogged suction strainer or too-high oil viscosity.

-Symptoms: Loud knocking noise, erratic flow, pitted pistons.

-Fix: Check oil temperature (ideal: 40–55°C), replace filter, verify line diameter meets Rexroth's minimum recommendation.

Slipper Pad Wear

-Cause: Low oil viscosity or water contamination, breaking down the hydrodynamic film.

-Symptoms: Reduced volumetric efficiency, metallic particles in oil analysis.

-Fix: Switch to ISO VG 46 or 68 hydraulic oil; install a water removal filter.

Shaft Seal Leakage

-Cause: Excessive case drain backpressure > 2 bar.

-Fix: Verify the drain line is unobstructed and sized at least one tube size larger than the manufacturer's spec.

For more information on the A2FLO hydraulic pump, please visit https://www.baolilaihydraulic.com/product/.

Specifications

Selection Table

Q1: Can the AA2FLO be used in a closed-loop hydrostatic transmission?

A1: No. The AA2FLO is strictly an open circuit pump. Closed-loop applications require a bi-directional variable displacement pump with an integral charge pump, such as the Rexroth A4VG series.

Q2: What maintenance interval does Rexroth recommend?

A2: Oil change every 2,000 hours or annually (whichever comes first). Replace the return filter every 500 hours. Full pump inspection recommended at 8,000 hours.

Q3:How to purchase an A2FLO 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 A2FLO hydraulic pump?

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