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A4VG Charge Pump | A4VG28, A4VG45, A4VG125, A4VG250 | Hydraulic Gear Feed Pump
| Model Number | A4VG28 A4VG40 A4VG45 A4VG56 7190 125 180 250 |
|---|
Product Description
A4VG Series Hydraulic Gear Charge Pumps for Closed-Loop Systems
Product Overview: The A4VG Series Charge Pump (also known as a Feed Pump) is a critical auxiliary component for closed-loop hydraulic drive systems, specifically designed to mount on Rexroth A4VG axial piston pumps. This featured selection covers the entire displacement spectrum, including compact models A4VG28/40/45, mid-range A4VG56/71/90, and heavy-duty configurations A4VG125/180/250. Positioned at the rear of the main pump, this gear pump provides essential cooling flush oil, compensates for internal leakage, and supplies necessary pilot control pressure. Engineered with high-precision gear sets, it maintains extremely stable flow output at high RPMs, making it the premier choice for overhauling road rollers, pavers, and tunnel boring machine drive systems.
Key Technical Advantages:
Precision Replenishment: Purpose-built for closed-loop duty, delivering stable charge pressure to prevent main pump cavitation during high dynamic loads.
Elevated Pressure Resilience: Constructed with reinforced pump bodies capable of handling instantaneous shock pressures generated during frequent system starts and stops.
Superior Volumetric Efficiency: Optimized side-plate compensation technology ensures over 93% efficiency across various oil temperatures, minimizing pilot system fluctuations.
OEM-Grade Fitment: Strictly adheres to A4VG rear through-drive shaft specifications, ensuring 100% “Plug-and-Play” replacement without manifold modifications.
Durable Mobile Architecture: Optimized for harsh construction environments with high-contamination-resistant bearings, extending overall service intervals.
Detailed Models & Parameters:
Core Series: Rexroth A4VG Charge / Feed Pump Series.
Model Keywords: A4VG28, A4VG40, A4VG45, A4VG56, A4VG71, A4VG90, A4VG125, A4VG180, A4VG250.
Displacement Range: Compatible with all charge specifications for A4VG pumps from 28cc to 250cc.
Functional Roles: Replenishment, Pilot Pressure Supply, Cooling Circulation.
Target Applications: Concrete mixer drum drives, road roller travel systems, paver hydraulics, and rotary drilling rigs.
Company Profile
We adhere to international quality management standards and provide a 1-year warranty including maintenance and replacement. We have established long-term strategic cooperation with many well-known brands and continuously launch new products to meet market development. Flexible payment terms are supported, including USD settlement, Alipay, Western Union and T/T.
Relying on our standardized production base and professional foreign trade team, we provide competitive factory direct prices, efficient logistics channels and punctual delivery. FJZY Hydraulic is devoted to being your trustworthy long-term partner in hydraulic and agricultural machinery fields.
Our Advantages
Fast & Reliable Delivery
Extensive Partnerships
We collaborate with numerous factories, offering a wide range of product selections and providing you with instant quote responses
Strict Quality Assurance
Quality first is our principle. We provide a one-year warranty service, ensuring you receive top-tier quality products with confidence.
Competitive Pricing
Through efficient production and close cooperation, we offer highly competitive prices, guaranteeing a cost-effective experience for you.
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