Rexroth A8VO variable hydraulic pump for Doosan DX420LC DX340LCA DX520LC Excavator 400914-00251 400914-00295 K1004523B 401-00369 401-00253B

The Rexroth A8VO series is a variable displacement axial piston pump widely used in heavy-duty construction equipment, including the Doosan DX420LC, DX340LCA, and DX520LC excavators. It serves as the primary hydraulic power source for the machine's implements, travel, and swing functions.

Design and Principle:
This pump utilizes a swashplate design where the piston stroke—and thus the displacement—is varied by changing the angle of the swashplate. This allows for precise, demand-based flow and pressure control, optimizing efficiency. The A8VO is typically an open-loop pump.

Key Features and Benefits for Doosan Excavators:
• Load-Sensing Control (Common): Often equipped with a load-sensing (LS) control system. It automatically adjusts pump output to match the system's pressure and flow demands, minimizing energy loss and reducing heat generation. This is crucial for excavator efficiency.

• High Power Density: Delivers high power in a compact, robust package suitable for the limited space and harsh operating conditions of an excavator.

• Excellent Efficiency: Advanced design reduces internal leakage and mechanical losses, improving fuel economy for the carrier machine.

• Durability: Built with high-quality materials to withstand continuous operation under high pressure, vibration, and contamination shocks typical in excavation work.

• Multiple Control Options: Can be configured with various controls (e.g., hydraulic, electro-proportional) to integrate precisely with the excavator's hydraulic system and electronic controllers.

Function in the Excavator:
In these Doosan models, the A8VO pump(s) draw hydraulic fluid from the tank and deliver variable, high-pressure flow to the main control valve. This valve then directs flow to the cylinders (boom, arm, bucket) and hydraulic motors (travel, swing). The pump's variable output ensures powerful, responsive, and controllable movements while conserving energy during low-demand or idle periods.

Summary:
The integration of the Rexroth A8VO variable pump is a key factor in the performance of Doosan DX-series excavators. It provides the necessary hydraulic power with intelligent, load-sensing control, contributing directly to the machine's productivity, controllability, and overall operational efficiency. Its reliability is essential for the demanding lifecycle of these earth-moving machines.

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Q1: What is the primary function of the Rexroth A8VO pump in Doosan DX-series excavators?

A1:Its primary function is to serve as the main hydraulic power source, generating variable, high-pressure flow to operate the excavator's key functions: the implement cylinders (for boom, arm, and bucket movement) and the hydraulic motors (for travel and swing).

Q2: Does the specific A8VO model remain the same across different Doosan excavator models like the DX420LC and DX520LC?

A2:No, not exactly. While the pump series is the same, the specific pump subtype (e.g., displacement size like A8VO 107) and its control configuration (hydraulic or electro-proportional) can vary based on the specific excavator model, size, and the manufacturer's (Doosan's) hydraulic system design for that machine.

Q3:What is the price and delivery time of the A8vo hydraulic pump for Doosan Excavator？

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

Q4:How to purchase a Doosan excavator hydraulic pump?

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