Rexroth A10vo74dflr Pump A10vo80 A10vo60 Rexroth A10vo71 A10vo74 Hydraulic Piston Pumps Spare Parts A10VO A10VSO Series 32

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Rexroth A10vo74dflr Pump A10vo80 A10vo60 Rexroth A10vo71 A10vo74 Hydraulic Piston Pumps Spare Parts A10VO A10VSO Series 32

A10VO71 Hydraulic Pump – Core Operating Principle: The Swashplate Mechanism

The A10VO71 hydraulic pump is built around a field-proven axial piston, swashplate design that has set industry benchmarks for decades. Multiple pistons are arranged within a rotating cylinder group, driven directly by the input shaft… a field-proven axial piston, swashplate design that has set industry benchmarks for decades. Multiple pistons are arranged within a rotating cylinder group, driven directly by the input shaft. The stroke length of each piston—and therefore the pump’s overall output—is determined by the fixed-angle swashplate. Its angled surface converts rotational motion into reciprocating piston movement, and this is precisely where flow control originates: an external servo or proportional valve physically adjusts the swashplate angle on demand. Ranging from a neutral, zero-angle position (zero flow) to its fully deflected maximum angle, the pump delivers infinitely variable flow up to its rated 71 cm³/rev displacement—all without changing input shaft speed. This compact yet highly responsive mechanism forms the backbone of its load-dependent, on-demand hydraulic delivery.

Key Technical Data at a Glance

• Displacement: 71 cm³/rev (≈4.33 in³/rev).

• Pressure Rating: Maximum operating pressure up to 350 bar (≈5,075 psi) depending on configuration, with standard continuous-duty operation typically rated at 280 bar.

• Speed Range: Designed to accommodate a wide operational window; maximum speeds can reach 2400 rpm or higher, varying with control type and porting options.

• Defining Feature: A comprehensive portfolio of integrated control options, transforming the base pump into an intelligent, application-optimized system component.

Control Variants: The Intelligence Behind the Power

Selecting the appropriate control variant is the most consequential application decision when specifying the A10VO71. This choice directly dictates the pump’s operating behavior and, in turn, overall system efficiency and machine functionality.

Pressure Control (LR, LU, LRC)

• Function: Operates as a self-adjusting, high-efficiency pressure source. It automatically reduces displacement (“de-strokes”) to sustain a predetermined pressure setting, delivering only the minimum flow required to compensate for leakage or minor system fluctuations.

• Expert Application: In a plastic injection molding machine, an LRC-equipped A10VO71 delivers the high holding pressure necessary during the curing stage without engaging a pressure relief valve. The pump simply holds pressure at the setpoint with negligible flow, dramatically reducing energy waste and thermal buildup compared to conventional fixed-displacement systems.

Pressure/Flow Compensator (LRDS, LRDF)

• Function: Supplies a steady, preset flow rate to a given function regardless of load-induced pressure variations (within power limits). It combines priority flow regulation with integrated pressure-limiting protection.

• Expert Application: In the feed circuit of an industrial planer or surface grinder, constant table feed speed is essential for achieving a uniform finish. An LRDF-controlled A10VO71 maintains this feed rate consistently as the cutting tool engages the workpiece, irrespective of fluctuating resistance.

Load-Sensing Control (LRDS with LS port)

• Function: Represents the highest standard of hydraulic efficiency in multi-function systems. The pump continuously senses the highest pressure demand across all active functions via a dedicated LS (Load Sense) signal line. It then supplies only the necessary flow at a pressure marginally above that demand—defined as the Δp (delta-P).

• Expert Application: On a mobile crane performing simultaneous boom hoist, telescoping, and slewing operations, a load-sensing A10VO71 automatically delivers the precise pressure required by the most demanding function and distributes available flow according to the operator’s valve commands. This eliminates parasitic pressure drops across throttling valves, yielding substantial energy savings and significantly reducing cooling system demands.

Performance Characteristics & Design Advantages

The A10VO71’s lasting popularity among OEMs and remanufacturing shops stems from a proven set of performance-driven design attributes:

• High Power Density: Its compact, rugged structure delivers outstanding power output relative to its physical footprint and weight—a critical advantage in space-limited mobile equipment.

• Superior Overall Efficiency: Precision machining minimizes internal cross-port leakage (excellent volumetric efficiency), while refined mechanical kinematics reduce frictional losses (high hydromechanical efficiency). The tangible result is lower operating costs through reduced fuel or electrical draw and minimized waste heat rejection.

• Responsive and Stable Control Dynamics: The integrated control systems are widely recognized for their precise, stable, and rapid response, enabling smooth, predictable machine movements that enhance both operator productivity and worksite safety.

• Engineered for Serviceability: Designed with maintenance accessibility in mind. Major sub-assemblies—the rotating group, housing, and control cover—are physically separable, simplifying inspection, seal renewal, or major overhaul when performed with correct tooling and technical knowledge.

Common Industrial & Mobile Applications

The A10VO71’s combination of durability, efficiency, and controllability positions it as a versatile power solution across multiple sectors:

• Mobile Machinery: A staple hydraulic power source in excavators, wheel loaders, telehandlers, and cranes, driving work attachments, travel motors, and steering systems.

• Industrial Production: Essential to plastic injection molding machines, hydraulic presses, and machine tool auxiliaries (e.g., clamping, tool changers), where precise and repeatable force application is mission-critical.

• Material Processing: Provides dependable power for wood chippers, compactors, and balers, all of which operate under pulsating loads and challenging duty cycles.

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FAQ

Q1: What is the most common failure mode for an A10VO71, and how can it be prevented?

A1: Fluid contamination remains the primary cause of premature failure. The rotating group—particularly piston/bore interfaces and slipper/swashplate contact surfaces—experiences accelerated wear when fluid cleanliness is not adequately maintained. Strict compliance with ISO 4406 cleanliness standards, typically 18/16/13 or finer as specified by Rexroth, is essential. The most economical and effective prevention strategy is a disciplined preventive maintenance schedule incorporating regular filter element changes and routine oil analysis.

Q2: My pump is noisy. What could be the issue?

A2: Cavitation—recognizable as a suction-side rattle or gravelly noise—is a frequent culprit. Examine the inlet circuit carefully: verify that the suction hose is properly sized and free from kinks or restrictions, confirm that the tank breather is unobstructed, ensure the fluid viscosity is appropriate for the current operating temperature, and check that the pump is not mounted excessively above the oil level. Persistent whining or grinding sounds typically point to internal component wear or bearing distress.

Q3: How to purchase an A10VO71 hydraulic pump?

A3: To place an order, simply reach out using the contact form on the right sidebar or the contact details located in the top header bar. We welcome inquiries via email, online form, WeChat, WhatsApp, or whichever channel suits you best—our team is ready to assist with your purchase.

Q4: What is the price and delivery time of the A10VO71 hydraulic pump?

A4: Pricing and lead times are quoted on a case-by-case basis, depending on the exact model designation and specifications you require. Kindly provide your specific model number, and we will promptly respond with a detailed quotation and estimated delivery schedule.