Komatsu PC27MR Hydraulic Pump Assembly 708-1S-00261
Product Overview
Komatsu PC27MR Hydraulic Pump Assembly 708‑1S‑00261 is an original‑spec variable‑displacement Hydraulic piston pump, serving as the core power source for the hydraulic transmission of Komatsu PC27MR mini excavator Machine. This integrated hydraulic pump supplies stable high‑pressure hydraulic flow for the whole hydraulic system, driving slewing, walking, arm and bucket movements of the compact construction equipment. The assembly includes pump body, rotating group, control valve and built‑in relief components, fully matching the original hydraulic circuit layout. Adopting swash‑plate axial piston structure, it features high volumetric efficiency, compact size, low noise and strong anti‑pollution performance. It is widely used for OEM replacement, field overhaul and aftermarket spare‑parts matching of small excavators. The stable operation of this Hydraulic piston pump directly guarantees the working reliability and service life of the entire hydraulic system and the matched Machine.
Technical Specifications
- Model: Komatsu PC27MR Hydraulic Pump Assembly
- OEM Part No.: 708‑1S‑00261
- Product Type: Variable‑displacement axial Hydraulic piston pump, main hydraulic pump for mini excavator hydraulic system
- Displacement: Matched for 2.7‑ton compact excavator
- Rated continuous working pressure: 280 bar; Peak pressure: 320 bar
- Max rotating speed: 2600 rpm
- Control mode: Load‑sensing pressure compensation control
- Installation: Standard flange mounting, splined shaft connection
- Working medium: Anti‑wear hydraulic oil for mobile construction hydraulic system
- Operating temperature: -20℃ ~ +85℃
- Feature: Integrated valve block design, compact structure, precise dimensional matching, excellent interchangeability, suitable for narrow installation space of small engineering Machine
Working Principle
The engine drives the input shaft of this Hydraulic piston pump, pistons reciprocate inside the cylinder block to realize oil suction and high‑pressure oil discharge. The built‑in load‑sensing control unit automatically adjusts the swash‑plate angle according to load feedback from the hydraulic system, changing pump displacement to match the flow demand of the Machine, reducing energy consumption and heat generation. When internal pistons, valve plates or sealing parts of the hydraulic pump are worn, faults such as weak digging force, slow movement, high internal leakage and oil leakage will occur. Replacing the qualified 708‑1S‑00261 pump assembly can fully restore the hydraulic power performance of the excavator and keep the hydraulic system running stably.
Core Advantages
1. Strictly conforms to Komatsu original dimension standards, direct replacement without secondary processing, greatly shortens maintenance time of the mini excavator Machine.
2. Mature axial piston structure, high volumetric efficiency, stable pressure output under frequent start‑stop and light‑heavy load conditions, improving the stability of the hydraulic system.
3. Integrated relief valve and load‑sensing control, effectively absorb hydraulic impact, protect the hydraulic pump and executive components from overload damage.
4. High‑precision friction pairs and heavy‑duty seals, strong contamination resistance, adapts to dusty and harsh construction site environments, extending service life of the Hydraulic piston pump.
5. Complete assembly delivery, avoiding assembly errors during on‑site maintenance, ensuring stable performance after installation.
Application Range
Komatsu PC27MR Hydraulic Pump Assembly 708‑1S‑00261 Hydraulic piston pump is a key power component for the open‑loop hydraulic system of compact construction Machine. It is specially applied to Komatsu PC27MR mini excavators, and can also be used for renovation and matching of similar small engineering machinery. Widely supplied for machinery repair workshops, maintenance stations, construction equipment leasing companies and global aftermarket spare‑parts trading business.
