A10VNO85DFR/53L-VSD62N00 Rexroth Piston Pump 85cc 210bar

Product Overview

The A10VNO85DFR/53L-VSD62N00 is a Bosch Rexroth A10VNO Series 53 swashplate-type axial piston variable displacement pump with a nominal displacement of 85 cm³/rev (5.19 in³/rev), rated operating pressure of 210 bar (3050 psi), peak pressure capability of 250 bar (3600 psi), maximum speed of 2700 rpm, maximum flow of approximately 230 L/min at 2700 rpm, maximum drive power of approximately 80 kW at 210 bar, maximum torque of 284 N·m, and weight of approximately 22 kg. Designed for hydrostatic drives in open circuits, the pump features a swashplate-type axial piston rotary group, delivering output flow proportional to drive speed and displacement, with stepless variation via swashplate angle adjustment.

This model is equipped with DRF pressure-flow combined control, integrating pressure compensation and flow regulation for coordinated constant pressure holding and on-demand flow supply, with short response times and high control precision. The A10VNO series is specifically engineered for low-pressure applications such as tractor hydraulic systems and fan drives, featuring high power density, compact mounting dimensions, and low-noise operation as an economical alternative to fixed displacement pumps.

The pump is widely deployed in John Deere tractors (6170R, 6190R, 6210R models), Kirovets K-700 tractors, and various agricultural machinery, construction equipment, and industrial hydraulic systems. The OEM part number for A10VNO85 on John Deere equipment is R902478088.

Companion models A10VNO28 (28 cm³/rev, 3200 rpm max, weight approx. 11.5 kg), A10VNO45 (45 cm³/rev, 2900 rpm max, weight approx. 14 kg), and A10VNO63 (63 cm³/rev, 2700 rpm max, weight approx. 18 kg) complete the A10VNO series product matrix, covering a wide displacement range of 28–85 cm³/rev for system integration solutions across different flow requirements.

Every A10VNO85DFR/53L-VSD62N00 undergoes 100% simulated duty-cycle testing prior to shipment — covering pressure holding, flow output, control response, and internal leakage — ensuring complete drop-in interchangeability with original Rexroth pumps without installation or plumbing modifications.

Technical Specifications

A10VNO85DFR/53L-VSD62N00 Main Model Specifications:

• Model: A10VNO85DFR/53L-VSD62N00

• Brand: Bosch Rexroth

• Series: A10VNO Series 53

• Pump Type: Open-circuit swashplate axial piston variable displacement pump

• Nominal Displacement: 85 cm³/rev (5.19 in³/rev)

• Rated Operating Pressure: 210 bar (3050 psi)

• Peak Pressure: 250 bar (3600 psi)

• Maximum Speed (Vg max): 2700 rpm

• Maximum Flow at 2700 rpm: Approx. 230 L/min

• Maximum Drive Power at 210 bar: Approx. 80 kW

• Maximum Torque: 284 N·m

• Control Type: DRF pressure-flow combined control

• Direction of Rotation: L (left-hand, counter-clockwise, viewed from shaft end)

• Mounting Flange: SAE standard flange

• Shaft Type: 3/4 in 11T 16/32DP splined shaft (SAE J744 19-4)

• Port Connections: Outlet SAE flange (Code 61), 3/4 in; Inlet SAE flange (Code 61), 1 1/4 in

• Case Drain Port: ISO 11926, 3/4-16UNF-2B

• Pilot Pressure Port: ISO 11926, 7/16-20UNF-2B

• Housing Material: Cast iron

• Weight: Approx. 22 kg (with pressure control)

• Case Volume: 0.8 L

• Moment of Inertia: 0.006 kgm²

• Permissible Angular Acceleration: 2500 rad/s²

• Inlet Absolute Pressure Range: 0.8–5 bar

• Fluid Compatibility: Mineral-based hydraulic oil

A10VNO Series Same-Family Displacement Reference (nominal conditions):

• A10VNO28: 28 cm³/rev, 210 bar rated, 250 bar peak, 3200 rpm max, flow 90 L/min at 3200 rpm, max power 31 kW, max torque 94 N·m, weight 11.5 kg

• A10VNO45: 45 cm³/rev, 210 bar rated, 250 bar peak, 2900 rpm max, flow 131 L/min at 2900 rpm, max power 46 kW, max torque 150 N·m, weight 14 kg

• A10VNO63: 63 cm³/rev, 210 bar rated, 250 bar peak, 2700 rpm max, flow 170 L/min at 2700 rpm, max power 59 kW, max torque 210 N·m, weight 18 kg

• A10VNO85: 85 cm³/rev, 210 bar rated, 250 bar peak, 2700 rpm max, flow 230 L/min at 2700 rpm, max power 80 kW, max torque 284 N·m, weight 22 kg

Data based on 210 bar rated conditions without considering mechanical and volumetric efficiency.

Key Technical Advantages

1. DRF Pressure-Flow Combined Control — Precise Power Management and Fast Response

The A10VNO85DFR/53L-VSD62N00 features DRF pressure-flow combined control, integrating pressure compensation and flow regulation in a single controller. This control method achieves coordinated constant pressure holding and on-demand flow supply through pressure feedback and flow demand coordination: when system pressure reaches the set point, the pump automatically reduces displacement to only leakage flow, eliminating relief losses; when system pressure drops, flow output is automatically restored. The DRF control delivers short response times and high control precision, particularly suitable for tractor hydraulic hitch systems, fan drives, and other low-pressure applications requiring precise flow and pressure coordination.

2. High Power Density and Compact Structure — 80 kW from 22 kg

The A10VNO85 delivers approximately 80 kW maximum power at 2700 rpm and 210 bar, weighing only approximately 22 kg, with power-to-weight ratio leading among comparable products. The pump employs swashplate axial piston design with extremely compact mounting dimensions, enabling easy installation within the limited engine compartment of tractors. As an economical alternative to fixed displacement pumps, the A10VNO series achieves variable pump flexibility with fixed pump reliability through cost-optimized design.

3. Low Noise Operation and Excellent Suction Performance

The A10VNO series is designed with low-noise operation as a core objective, effectively suppressing pressure pulsation and fluid-borne noise through optimized valve plate flow passages and precision-machined rotary group. The pump delivers excellent suction performance with an inlet absolute pressure range of 0.8–5 bar, ensuring adequate suction even at maximum speed of 2700 rpm to prevent cavitation damage. Stable bearing design ensures long service life, with the drive shaft capable of withstanding axial and radial loads.

4. Flexible Modular Design and Broad Media Compatibility

The A10VNO series offers four displacement ratings from 28 to 85 cm³/rev within a shared mounting flange system, providing flexible flow matching for system design. The pump supports through-drive configuration, enabling tandem connection of multiple pumps for compact integration of multi-circuit hydraulic systems. Seals are standard NBR material, compatible with mineral-based hydraulic oil, anti-wear hydraulic oil (HLP/HM), and environmentally friendly hydraulic fluids.

5. Exceptional Field Interchangeability and Broad Compatibility

The A10VNO85DFR/53L-VSD62N00 features mounting flange, shaft specifications, and port layouts conforming to Rexroth A10VNO Series standards, enabling drop-in interchangeability with other A10VNO85 models of the same specification. The pump is directly compatible with John Deere 6170R, 6190R, 6210R tractors (OEM part number R902478088) and Kirovets K-700 agricultural machinery, installing directly without modifying mounting interfaces or plumbing layouts.

Application Areas

• Agricultural Machinery: John Deere 6170R/6190R/6210R tractor hydraulic systems, Kirovets K-700 tractor hydraulic hitch and steering systems

• Tractor Hydraulic Systems: Hydraulic hitch, steering, and auxiliary hydraulic circuits with DRF control for precise flow and pressure coordination

• Fan Drive Systems: Engine cooling fan hydraulic drives, high-speed capability and compact size meeting fan drive requirements

• Construction Machinery: Auxiliary hydraulic circuits for medium excavators and loaders

• Forestry Machinery: Hydraulic power systems for harvesters and forwarders

• Municipal Vehicles: Sanitation vehicle and street sweeper hydraulic power units

The A10VNO85DFR/53L-VSD62N00 is ideally suited for low-to-medium pressure hydraulic systems requiring 210 bar continuous working pressure and displacements in the 63–85 cm³/rev range — the classic configuration for tractor hydraulic systems and fan drive applications.

Expert Maintenance Tips

1. Shaft Alignment and Coupling Requirements

Maintain concentricity between the pump shaft and drive shaft within 0.05 mm. Flexible couplings are strongly recommended to accommodate minor angular misalignment. The A10VNO85DFR/53L-VSD62N00 features an SAE standard mounting flange and 3/4 in 11T splined shaft — never strike the shaft end during installation to avoid damaging internal seals and bearings. The drive shaft can withstand axial and radial loads, but sustained loads exceeding permissible limits should be avoided.

2. Pre-Start Priming Procedure

Before initial startup, the pump must be slowly filled through the case drain port with clean hydraulic oil to ensure adequate lubrication, cooling, and sealing during startup. Start the pump in jog mode until the pump and piping are sufficiently filled and vented. After complete venting, run at low pressure for 5–10 minutes, check piping and component tightness, then gradually increase to rated pressure.

3. DRF Controller Commissioning

Commission the DRF pressure-flow combined controller ensuring coordination between pressure compensation setting and flow regulation setting. The pressure compensation setting should be at least 10–15 bar below the system relief valve setting. During commissioning, first turn the pressure setting screw to the lowest pressure position, then gradually increase to the target pressure; the flow regulation setting should be adjusted according to actual system flow requirements. Adjustment must be performed with the pump at full displacement and low operating pressure to avoid system pressure oscillation.

4. Fluid Cleanliness and Filtration

Fluid cleanliness of NAS Class 9 (ISO 18/16/13) or better is recommended. Use pressure line filters with 10 μm filtration accuracy. Avoid suction filters, which increase suction resistance and cavitation risk; if essential, use with a vacuum switch monitor. Install a breather filter with filtration accuracy ≤10 μm on the reservoir and regularly check oil level and fluid condition.

5. Restart Procedure After Extended Shutdown

If the pump has been idle for more than 30 days, manually rotate the shaft several turns to verify free rotation before restarting. Check for abnormal leakage at the case drain port. After startup, operate at low pressure for 10–15 minutes until oil temperature reaches normal operating range before applying full load.