Rexroth A10CO45 Hydraulic Pump | A10CO45DFR1/52R High Pressure Piston Pump Replacement

Genlu Hydraulic proudly introduces our A10CO45 Series (specifically A10CO45DFR1/52R) high-performance axial piston variable displacement pumps. This series is engineered as a seamless, premium replacement for the classic Rexroth A10CO/A10VSO Series 52 technical platform. Purpose-built for mobile machinery, commercial vehicle chassis, and mid-to-high pressure industrial circuits, its core DFR1 controller features advanced load-sensing and pressure-limiting functionality, precisely matching flow output to instantaneous system demand. Genlu guarantees 100% Drop-in Interchangeability in SAE shaft ends, mounting flanges, through-drive profiles, and port geometries compared to original Rexroth units. Each A10CO45 pump is validated through 100% simulation testing under rated load conditions to ensure exceptional volumetric efficiency, low noise, and rapid dynamic response compliance.

Technical Specifications 

• Product Series: Rexroth A10CO Series Axial Piston Variable Pump (Series 52)

• Complete Model Code: A10CO45DFR1/52R-VWC12H502D-S1818

• Displacement: 45 cc/rev

• Rated Operating Pressure: 25 MPa (250 bar)

• Peak Pressure: 31.5 MPa (315 bar)

• Max Speed: 2600 rpm (at absolute suction pressure)

• Max Flow Rate: Approx. 117 L/min (at rated speed)

• Control Mode: DFR1 (Load-sensing with pressure limiter, flow & pressure control)

• Direction of Rotation: Clockwise (R, viewed from shaft end)

• Sealing Material: FKM / Viton (Designation V, high temperature & synthetic fluid resistant)

• Through Drive: Supported for tandem pump combinations

Key Technical Advantages:

• DFR1 Load-Sensing Intelligence: Features a dual-spool control block (flow control and pressure cutoff) that monitors load pressure to dynamically adjust the swashplate angle. It shifts the pump to minimum displacement during standby or pressure-holding phases, dramatically lowering energy consumption and oil temperature rise.

• Swashplate Optimization & Quiet Operation: The robust 9-piston swashplate architecture, combined with a hydrodynamically optimized valve plate fluid-relief groove design, suppresses pressure pulsations, lowering airborne operational noise to strict industrial compliance levels.

• Bimetallic Valve Pair Longevity: The interface between the cylinder block and the valve plate is bonded using an advanced high-strength bimetallic cladding process to resist adhesive wear. The hardened, ultra-precision ground pistons resist abrasive degradation under heavy duty or dusty environments.

• High-Torque Through-Drive Versatility: The Series 52 housing design includes a highly rigid through-drive configuration at the rear, enabling the tandem mounting of secondary gear or piston pumps to drive complex, multi-circuit mobile operations.

Application Areas:

• Environmental & Municipal Vehicles: Refuse compactors, street sweepers, and truck-mounted upper hydraulic utility drives.

• Mobile & Agricultural Machinery: Mini-loader auxiliary circuits, truck-mounted cranes, and specialized harvesters.

• Industrial Hydraulic Power Units: Small-to-medium hydraulic power packs, shearing machines, scrap balers, and industrial automation stations.

Expert Maintenance Tips:

• Mandatory Pre-priming and De-aeration: Following installation and prior to initial startup, the pump housing must be completely filled with clean hydraulic oil via the highest available case drain port (L or L1) to prevent immediate piston shoe and swashplate friction failure from dry running.

• X-Port Control Line Connection: Because the DFR1 relies on load-sensing, ensure the X control port is properly connected to the LS signal line of the directional control valve. If load sensing is not required, the X-port must be plumbed in strict accordance with pressure bypass guidelines.

• Strict Case Backpressure Limits: Ensure that the case drain line routes independently and directly back to the reservoir. The internal case pressure must never exceed 0.1 MPa (1 bar), as excessive backpressure will trigger premature front shaft seal leakage or blowouts.