Uchida‑Rexroth AP2D‑21 Hydraulic Pump for SK30UR Mini Excavator

Uchida‑Rexroth AP2D‑21 Hydraulic Pump for SK30UR Mini Excavator

4 week ago

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 4 year year

Product details

Uchida‑Rexroth AP2D‑21 Hydraulic Pump for SK30UR Mini Excavator

Product Overview

Uchida‑Rexroth AP2D‑21 is a reliable axial Hydraulic piston pump, acting as the main power source of the hydraulic system for Kobelco SK30UR mini excavator Machine. This compact hydraulic pump converts mechanical power from the engine into high‑pressure hydraulic oil, delivering stable flow and pressure to drive travel motor, swing motor, hydraulic cylinder and other actuators. With mature Uchida‑Rexroth manufacturing technology, the Hydraulic piston pump features small installation size, light weight and high volumetric efficiency, perfectly matching the narrow installation space of mini excavator. Its stable output ensures coordinated action of the whole hydraulic system, so that the excavation, travelling and slewing movements of the Machine can be carried out smoothly. It is widely used for original replacement, equipment overhaul and aftermarket spare‑parts supply of SK30UR mini excavator.

Technical Specifications

‑ Model: AP2D‑21

‑ Brand: Uchida‑Rexroth

‑ Product Type: Axial Hydraulic piston pump, main hydraulic pump for mini excavator

‑ Displacement: 21cc/rev

‑ Rated working pressure: 245 bar

‑ Peak pressure: 280 bar

‑ Drive form: Splined shaft input

‑ Mounting: Standard flange installation

‑ Applicable Machine: Kobelco SK30UR Mini Excavator

‑ Working medium: Anti‑wear hydraulic oil for construction hydraulic system

‑ Operating temperature: ‑20℃ ~ +85℃

‑ Feature: Compact structure, low‑speed high‑torque performance, strong anti‑pollution capacity, good interchangeability, durable for frequent cyclic operation of small construction Machine.

Working Principle

Engine power drives the input shaft of the Hydraulic piston pump. The pistons inside the cylinder block reciprocate against the swash‑plate, completing oil suction and high‑pressure oil discharge. The pressurized hydraulic oil is transmitted through pipelines and control valves to every actuator of the hydraulic system, providing power for all hydraulic actions of the excavator Machine. After long‑time heavy‑load work, internal components including pistons, cylinder block and valve plate will wear gradually. This will cause internal leakage, pressure drop, slow movement or weak power of the Machine. Replacing a qualified AP2D‑21 hydraulic pump can fully restore the power performance of the excavator and keep the hydraulic system in normal working condition.

Core Advantages

1. Uchida‑Rexroth original‑grade quality, stable pressure output, greatly improving the reliability of the whole hydraulic system.

2. Miniaturized compact design, perfectly fits the limited installation space of SK30UR small‑size Machine.

3. High‑precision friction pairs, low internal leakage and high efficiency, reducing energy loss and heat generation of the Hydraulic piston pump.

4. Good contamination‑resistance performance, suitable for dusty and harsh construction‑site working environment.

5. Standard installation dimensions, direct replacement without extra machining, shortening maintenance downtime of the Machine.

Application Range

AP2D‑21 Hydraulic piston pump is the core power component of the open‑loop hydraulic system. It is specially used for Kobelco SK30UR mini excavator Machine. Suitable for machinery repair workshops, hydraulic maintenance stations, construction equipment leasing companies and global spare‑parts suppliers.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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4 year

Address: Ningbo, China

Main Product: hydraulic motor , gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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