A18VO55DRS Hydraulic Piston Pump
Product Overview
The A18VO55DRS is a high‑performance variable‑displacement axial Hydraulic piston pump, serving as the core power source of the hydraulic system for construction and industrial Machine. This advanced hydraulic pump adopts a dual‑pump tandem structure, which can independently supply pressure oil for different hydraulic circuits, realizing flexible flow distribution and load matching. With compact design, high volumetric efficiency and strong overload resistance, it is widely applied to small and medium‑sized excavators, construction machinery and special equipment. The stable output of this Hydraulic piston pump directly determines the power performance, action smoothness and operation reliability of the entire hydraulic system and the matched Machine. It is suitable for OEM matching, equipment overhaul and aftermarket spare‑parts replacement, and can adapt to harsh working conditions such as high temperature, dust and heavy load.
Technical Specifications
- Model: A18VO55DRS
- Product Type: Variable‑displacement axial Hydraulic piston pump, main hydraulic pump for mobile hydraulic system
- Displacement: 55cc per revolution
- Rated continuous working pressure: 350 bar; Peak pressure up to 400 bar
- Control mode: Load sensing, pressure compensation, variable displacement control
- Structure: Tandem dual‑pump integrated design
- Mounting form: Flange connection, splined shaft input
- Working medium: Anti‑wear hydraulic oil for engineering hydraulic system
- Operating temperature: -20℃ ~ +85℃
- Feature: Low noise, excellent anti‑pollution performance, precise pressure control, good interchangeability, durable under long‑term heavy‑load operation of construction Machine
Working Principle
The engine drives the input shaft of the Hydraulic piston pump, and the pistons inside the cylinder block reciprocate along the swash plate to complete oil suction and high‑pressure oil discharge. The built‑in control valve adjusts the inclination angle of the swash plate in real time according to the load feedback signal of the hydraulic system, changing the displacement of the hydraulic pump to match the flow demand of the Machine, reducing energy consumption and hydraulic heat generation. When the internal friction pairs such as pistons, valve plates and cylinder blocks are worn, the hydraulic pump will suffer increased internal leakage, decreased output pressure and insufficient power of the Machine. Replacing a qualified A18VO55DRS can restore the hydraulic power performance of the equipment and keep the hydraulic system running stably.
Core Advantages
1. Mature axial piston technology, stable high‑pressure output under continuous heavy‑load operation, effectively improving the reliability of the hydraulic system.
2. Tandem dual‑pump design optimizes the oil supply logic of multiple actuators, reduces mutual interference between circuits, and improves the action coordination of the construction Machine.
3. Load‑sensing variable control intelligently matches flow and load, lowers energy loss and oil temperature rise, and prolongs the service life of the Hydraulic piston pump.
4. High‑precision machining of friction pairs, strong contamination resistance, adapting to the harsh working environment of construction sites.
5. Standard mounting dimensions, direct replacement without secondary processing, greatly shortening the maintenance time of the equipment.
Application Range
The A18VO55DRS Hydraulic piston pump is an important power component for the open‑loop hydraulic system of engineering machinery. It is widely used in small and medium excavators, aerial work platforms, foundation equipment and other heavy‑duty Machine. It can be used for new equipment supporting, old equipment renovation and aftermarket spare‑parts supply, meeting the stringent requirements of various construction working conditions.
