LD-A4VG71 71cc High Pressure Closed Circuit Variable Piston Pump | Heavy-Duty Hydraulic Pump HYDSUNRIDA

LD-A4VG71 71cc High Pressure Closed Circuit Variable Piston Pump | Heavy-Duty Hydraulic Pump HYDSUNRIDA

HYDSUNRIDA LD-A4VG71 71cc closed circuit variable piston pump, 400bar nominal & 450bar peak pressure, 1:1 OEM replacement, ISO9001 & SGS certified, factory direct supply for construction and mining machinery.SEO Meta Long: Premium LD-A4VG71 71cc high-pressure closed circuit hydraulic piston pump. 1:1 non-destructive replacement for imported pumps, strict factory testing, heavy-load resistance, cost-effective price and full after-sales service for engineering hydraulic systems.

1. Product Overview

LD-A4VG71 is a heavy-duty closed-circuit variable piston pump with 71cc displacement and 400bar rated pressure. It supports 24/7 full-load continuous operation for medium and heavy-duty hydraulic systems.Featuring stable performance, low leakage and high efficiency, LD-A4VG71 achieves 1:1 non-destructive replacement of standard A4VG71 pumps. No equipment modification or system debugging is required to cut maintenance costs.

2. Quality Certification & Testing

LD-A4VG71 holds ISO9001 and SGS certifications, complying with national industrial hydraulic standards for stable and reliable quality.Each pump undergoes strict pressure, flow, leakage and endurance tests, ensuring ultra-low failure rates under continuous heavy loads.

3.1 Basic Specifications

• Peak Pressure: 450 bar

• Applicable Circuit: Closed hydraulic circuit

• Hydraulic Oil Viscosity: 35-55 mm²/s

• Working Performance: 24h non-stop full-load continuous operation

• Warranty: 12-month complete machine warranty

3.2 Control Modes

• DA Speed Control: Adaptive speed regulation for stable machinery operation

• EZ Proportional Control: Precise electro-mechanical adjustment

• HD Hydraulic Control: Sensitive hydraulic servo regulation for heavy loads

4. Core Advantages

4.1 1:1 Zero-Modification Replacement

Fully compatible with standard A4VG71 dimensions and parameters. Direct replacement for imported pumps reduces procurement and upgrade costs.

4.2 Factory Direct Supply

Factory direct sales with competitive pricing. Sufficient spot stock supports fast delivery and bulk orders.

4.3 Heavy-Load Durability

High-strength alloy core parts and precision grinding deliver excellent pressure and wear resistance for long-term stable operation.Optimized variable structure minimizes internal leakage and heat generation, improving system efficiency and running stability.

4.4 Low Heat & High Efficiency

4.6 Custom OEM/ODM Service

Customizable pressure and flow parameters are available to fit complex and special working conditions.

4.7 Full-Cycle After-Sales Service

Complete professional support including free model selection, installation guidance and reliable after-sales technical service.

5. Full Series Standard Models (LD Upgrade Version)

LD-A4VG71 is an upgraded version with higher precision, better sealing and stronger durability than standard pumps.

5.1 DA Speed Sensing Control Series

LD-A4VG71DA1D3L/32R-NZCXX, LD-A4VG71DA2D3L/32R-NZCXX, LD-A4VG71DA1D2L/32R-NZCXX, LD-A4VG71DA2D2L/32R-NZCXX

5.2 EZ Proportional Control Series

LD-A4VG71EZ1D3L/32R-NZCXX, LD-A4VG71EZ2D3L/32R-NZCXX, LD-A4VG71EZ1D2L/32R-NZCXX, LD-A4VG71EZ2D2L/32R-NZCXX

5.3 HD Hydraulic Control Series

LD-A4VG71HD3D3L/32R-NZCXX, LD-A4VG71HD2D3L/32R-NZCXX, LD-A4VG71HD3D2L/32R-NZCXX

5.4 General Standard Series

LD-A4VG71 32R-NZCXX, LD-A4VG71 32N-NZCXX, LD-A4VG71-NZCXX

6. Application Fields

Suitable for construction machinery, mining equipment, concrete machinery, industrial machine tools and hydraulic test benches. Ideal for imported pump replacement and domestic substitution of closed-circuit hydraulic systems.