描述

Excavator Hydraulic Pump A4VG28 A4VG56 A4VG71 A4VG 71 A4VG85 A4VG90 A4VG180 A4VG110 A4VG125 A4VG175 Rexroth Piston Pump

A4VG180 – High‑Flow Variable Displacement Pump

The A4VG180 has a nominal 180 cm³/rev displacement, placing it in the high‑power‑density class. Its real strength is infinitely variable output: the swashplate angle adjusts in real time via hydraulic or electro‑hydraulic pilot signals, giving seamless flow control from zero to full capacity. This eliminates throttling losses and enables precise speed/torque regulation for hydraulic motors. Integrated proportional valves – such as HD (hydraulic remote), HZ (servo), or EP (electro‑proportional) – allow direct connection to PLCs or joystick networks in mobile equipment.

Swashplate Design – Built for Efficiency

The axial‑piston bent‑axis layout (fixed housing) achieves excellent volumetric and hydro‑mechanical efficiency, even at 450 bar continuous pressure. Hydrostatically balanced slippers reduce metal‑to‑metal contact and wear, while optimized piston/cylinder sealing cuts internal leakage across varying temperatures and pressures. The result is minimal energy loss and heat generation, lowering oil temperatures and reducing cooling demands.

Key Applications – Where It Excels

This pump is a specialist for demanding roles:

• Heavy mobile machinery (forestry harvesters, construction): powers closed‑loop track drives and boom/grapple functions with fast load‑sensing response under shock loads.

• Industrial production (large injection moulding machines): multiple units coordinate – one for clamp force, another for high‑speed injection – improving cycle times and part consistency.

• High‑dynamic test rigs (wind turbine gearboxes, vehicle axles): accurately simulates real‑world load profiles for durability validation.

Operational Advantages & Integration Essentials

Specifying the A4VG180 pays off in performance and longevity, but proper integration is key. Its robust, modular construction allows replacement of major sub‑assemblies (rotating group, control cover) without swapping the whole pump, cutting repair time and lifecycle costs. Filtration to ISO 4406 18/16/13 or better is mandatory to protect against contamination. Choose the right control: EP for programmable speed (winches, conveyors), DR for fixed‑pressure clamping, or DT for torque limiting to protect the prime mover. Also, correct charge‑pump sizing and an effective cooling/filtration circuit are essential to avoid cavitation and achieve full service life