A4VSO 125cc Cast-Iron Hydraulic Axial Piston Pump for Industrial Machines 350bar

Product Specification

A4VSO 125cc Cast-Iron Hydraulic Axial Piston Pump for Industrial Machines 350bar

Features:

Technical data:

Specifications:

Applications:

Competitive Advantage:

1. With optional explosion‑proof and corrosion‑resistant coatings, the A4VSO hydraulic pump is engineered to withstand harsh chemical, petrochemical, and marine environments without compromising performance. These specialized surface treatments provide a barrier against aggressive media—such as acidic condensates, saline spray, and volatile vapors—ensuring long‑term structural integrity and minimizing maintenance in safety‑critical installations. The explosion‑proof variant conforms to ATEX and IECEx standards, enabling safe deployment in zones with flammable gases or dust. OEMs in offshore drilling, chemical processing, and mining sectors gain confidence that their liquid power systems will maintain both compliance and continuous operation under the most demanding conditions.

2. The A4VSO piston pump combines a lightweight housing design with exceptional power density, delivering higher flow rates and pressures from a compact footprint. This optimized axial piston pump architecture reduces overall system weight, making it ideal for weight‑sensitive applications such as aerospace ground support equipment, high-speed rail maintenance vehicles, and mobile medical platforms. Lower mass translates to reduced transport costs and improved maneuverability without sacrificing hydraulic performance. Integrators can achieve greater payload capacities or enhanced mobility in off‑road and rail systems, while also meeting stringent industry weight regulations for airborne and track‑borne equipment.

3. Through advanced low‑viscosity start design, the A4VSO hydraulic pump reliably initiates operation at temperatures as low as -40 ℃, ensuring consistent fluid delivery during cold starts in arctic, alpine, or refrigerated environments. The specialized seal materials and optimized internal clearances reduce cold‑start torque requirements and prevent cavitation, enabling immediate actuator responsiveness in sub‑zero conditions. This cold‑weather capability is critical for applications such as polar drilling rigs, high‑altitude rescue vehicles, and cold storage facility equipment where equipment readiness and minimal pre‑heating are essential for operational safety and efficiency. OEMs and operators benefit from reduced warm‑up times and extended service intervals even in freezing climates.

The Analysis For Rexroth A4VSO Piston Pump Common Breakdown: 

1. Feedback sensor failure causing sluggish closed‑loop response: In A4VSO axial piston pumps equipped with displacement feedback sensors, sensor signal drift or dropout prevents the closed‑loop control system from obtaining accurate real‑time displacement data. Consequently, the controller accumulates error, manifesting as delayed response, oscillations, and overshoot in the hydraulic circuit. This can exacerbate system instability and compromise precision. To remedy the issue, operators should recalibrate or replace the feedback sensor module and verify the integrity and shielding of associated cabling to ensure reliable communication between the hydraulic pump and control electronics.

2. Axial seal failure causing internal leakage: When the axial seal ring between the valve plate and pump housing experiences permanent deformation or misalignment during installation, high‑pressure oil at the piston port leaks axially into the low‑pressure chamber. This internal bypass reduces effective displacement and results in diminished output flow and inability to maintain load pressure. During service, disassemble the valve plate assembly, verify O‑ring dimensions and condition, and properly reposition or replace the seal to restore correct sealing function and stable displacement in the hydraulic pump.

3. Pump shaft bending due to motor overload: If the hydraulic circuit demands torque beyond the pump’s design specifications, the drive motor may impart torque shocks that overload the pump shaft. Prolonged operation under such overload conditions can induce micro‑bending of the shaft, resulting in misalignment between the shaft and swashplate. This misalignment causes inaccurate swashplate angle regulation and piston slap within the barrel. Operators should ensure system loads remain within rated limits and, during troubleshooting, utilize laser alignment tools to verify motor‑pump concentricity. If misalignment is detected, realign or replace the pump shaft to restore proper axial piston pump function.