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Hydraulic pumps A4VTG071_A4VTG090 Replacement Hydraulic Piston Pump

100% Interchange With Rexroth's A4VTG pump
Warranty: 12 Months just like OEM Pump
Mark: SENHENGYUAN Hydraulics
Short Lead Time, Prompt Delivery

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Product Description

Product Overview

The A4VTG071/090 Rexroth-Interchangeable Hydraulic Piston Pump is a drop-in replacement for original Rexroth A4VTG series pumps (e.g., A4VTG71HD1D/32R-NZD10F001S, A4VTG90HD1D/32R-NZD10F002S), designed to eliminate costly system overhauls (e.g., reengineering mounting brackets or modifying hydraulic lines). This variable displacement pump matches OEM dimensional specifications (ISO 3019-2 flange mounting, SAE J744 shaft diameter), interface standards (SAE O-ring boss ports), and performance parameters (flow rate, pressure stability), ensuring seamless compatibility with existing machinery. Its robust design incorporates a swashplate control mechanism (with electro-hydraulic proportional actuation) that enables precise flow regulation, making it suitable for closed-loop hydraulic systems in heavy industry (e.g., mining haul trucks, offshore drilling rigs). It also features a built-in pressure relief valve (set to 420 bar) and a contamination indicator (ISO 4413 class 21/19/16) to protect against system damage, extending service life to over 10,000 hours.

Product Features

Precise Displacement Control: Available in 71 cc and 90 cc variants—71 cc for medium-power systems (e.g., excavator swing mechanisms) and 90 cc for high-power applications (e.g., mining truck drives)—with electro-hydraulic proportional control for flow adjustment. The response time of < 0.5 seconds (from 0% to 100% flow at 300 bar) ensures rapid adaptation to load changes, critical for dynamic machinery .

High Pressure Handling: Sustains continuous operating pressure of 350 bar (5,076 psi) with peak pressures up to 400 bar (5,801 psi)—capable of powering 100-ton mining haul truck wheel motors and offshore drilling rig winches. The pump’s pistons, coated with a 5μm thick chrome layer (hardness: HRC 60), resist wear even under high-pressure conditions .

Energy Efficiency: Achieves 94% overall efficiency (volumetric efficiency: 96%, mechanical efficiency: 98%) through optimized piston-cylinder geometry (tight clearance of 0.002-0.003mm) and low-friction swashplate bearings (ceramic-coated raceways). This reduces heat generation by 25% compared to original Rexroth pumps, minimizing the need for large cooling systems .

Durable Construction: Forged steel cylinder block (EN 10083-3) and hardened alloy pistons (AISI 4140) withstand shock loads up to 500 kN, while fluoroelastomer (FKM) seals resist chemical degradation from mineral oils and synthetic fluids. The pump also features a corrosion-resistant zinc-nickel coating (12 μm thick) for offshore and humid environments .

Applications

Perfect for retrofitting in mining equipment (haul truck hydraulic drives, loader lift cylinders), construction machinery (excavator swing mechanisms, bulldozer blade controls), metal extrusion presses (aluminum profile extrusion hydraulic systems, copper tube drawing machines), and offshore drilling rigs (drill string rotation drives, platform jacking systems). Its interchangeability makes it a cost-effective solution for maintaining aging Rexroth-equipped systems in steel and aluminum processing plants—for example, replacing a worn A4VTG71 in a steel mill’s continuous casting machine can restore system efficiency from 82% to 94%, reducing annual energy costs by $8,000+.

Manufactured by "SENHENGYUAN Hydraulics", these high quality replacement hydraulic piston pumps for Rexroth "A4VTG071" and "A4VTG090" feature genuine design and are completely interchangeable with the original Rexroth "A4VTG071" and "A4VTG090" pumps.

As our quality assurance, all pumps come with a 12-month warranty.

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