Rexroth A4VG variable hydraulic pump for Dynapac F14C concrete paver D967045593 D967045473 4700390602 4812155785 4700383958 378164 381280

The Rexroth A4VG series variable displacement axial piston pump is a high-performance hydraulic component utilized in heavy-duty mobile equipment such as the Dynapac F14C concrete paver. This closed-circuit pump is engineered to deliver precise, reliable, and efficient power for the demanding hydrostatic travel drives of a high-production paver.

Key Design and Functional Characteristics:

• Variable Displacement:​ Its defining feature is the ability to vary the swashplate angle, which changes the piston stroke and thus the pump's displacement and output flow. This allows for seamless, infinite control of the vehicle's travel speed and torque without requiring a gearbox, directly matching power output to the instantaneous load demand for optimal efficiency.
• Closed-Loop Circuit:​ The A4VG operates in a closed-loop configuration for the travel drive. The pump's two main work ports are directly connected to the hydraulic motors. This design is highly efficient for drives requiring frequent speed changes, braking, and reversing, as it minimizes losses and allows for smooth, responsive control in both forward and reverse directions.
• Integrated Charge Pump:​ The unit incorporates a small, fixed-displacement charge pump (typically a gear pump) mounted on the back. This serves critical functions: it replenishes the closed circuit, provides cooling flow, and maintains pressure for the servo-control system that operates the swashplate.
• Advanced Control Options:​ The pump is compatible with various electro-hydraulic or hydraulic proportional controls (e.g., HD type). In a modern paver like the F14C, this likely interfaces with the machine's electronic control system, enabling precise joystick or foot-pedal control over speed, direction, and acceleration profiles, contributing to smooth pavement operation.
• Robust Construction:​ Built for the harsh environment of road construction, it features a durable axial piston design, high-pressure capabilities (typically up to 450 bar continuous), and efficient tapered roller bearings to handle significant radial and axial loads from the driveline.

Role in the Dynapac F14C Paver:

On the Dynapac F14C, one or more A4VG pumps are the heart of the hydrostatic travel drive system. They convert the engine's mechanical power into controlled hydraulic power. This system provides the infinitely variable ground speed essential for precise paving work, from slow creep during mat placement to faster transit speeds. The pump's smooth control and responsive characteristics ensure consistent traction, stable speed under load, and reliable operation, which are fundamental to achieving uniform pavement density and surface quality.

In summary, the Rexroth A4VG pump in the Dynapac F14C is a sophisticated, high-efficiency hydraulic component that provides the precise, reliable, and variable power transmission required for the machine's critical travel and propulsion functions, directly supporting its performance and paving accuracy.

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Q1: What is the primary function of the Rexroth A4VG variable displacement pump in the Dynapac F14C paver?

A1: Its primary function is to provide the precise, variable, and efficient hydrostatic power for the machine's travel drive system. It allows for infinitely variable control of the paver's ground speed and torque, enabling smooth operation from slow paving to faster transit speeds, which is essential for high-quality concrete placement.

Q2: Why is the "closed-circuit" design of the A4VG pump particularly advantageous for a paver's travel system?

A2: The closed-circuit design is highly efficient for drives requiring frequent speed changes, braking, and reversing. It minimizes energy losses by directly connecting the pump's ports to the hydraulic motors, allowing for smooth, responsive, and immediate control in both forward and reverse directions—critical for the precise maneuvering and consistent operation of a paver.

Q3:What is the price and delivery time of the Rexroth A4VG pump for Dynapac concrete paver？

A3: The specific price and delivery time will depend on the equipment model or specific product model you provide.

Q4:How to purchase a Dynapac concrete paver hydraulic pump?

A4:You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.