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Help CenterDanfoss JR-R-S65C-LS-26-20-NN-N-3S1N0-A2NNNN-JJJ-NNN Hydraulic Axial Piston Pump
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English Summary: Danfoss JR-R-S65C-LS-26-20-NN-N-3S1N0-A2NNNN-JJJ-NNN Hydraulic Axial Piston Pump
Overview
The Danfoss JR-R-S65C-LS-26-20-NN-N-3S1N0-A2NNNN-JJJ-NNN is a high-performance, variable-displacement axial piston pump from Danfoss's Series 45 J‑Frame family. Engineered for open-circuit hydraulic systems, this pump delivers precise, reliable, and efficient power for demanding mobile and industrial applications. It is widely used as a main pump in high-power machinery.
Technical Features
Model Code Breakdown – The model number provides specific details about the pump's configuration:
JR-R: J‑Frame, open‑circuit axial piston pump with clockwise rotation (viewed from the shaft end).
S65C: Maximum displacement of 65 cc/rev.
LS: Control type – Load Sensing (LS) with Pressure Compensator (PC).
26: Pressure compensator setting (indicating 260 bar).
20: Load sensing (LS) differential setting (indicating 20 bar).
Variable Displacement Axial Piston Design – The pump utilizes a swashplate design, allowing for stepless, precise flow control by adjusting the displacement. This enables the pump to match output exactly to the system's demands, improving overall efficiency and reducing energy waste.
High Pressure & Speed Capability – With a displacement of 65 cc/rev, this pump provides substantial flow for high‑power applications. It operates at a continuous working pressure of 260 bar and can withstand peak pressures up to 400 bar (5,800 psi). The pump has a speed range of 500 to 2,800 rpm.
Advanced Control Technology – The pump supports load‑sensing control, which regulates output pressure based on actual load demands, and pressure compensation, which automatically adjusts displacement to maintain stable pressure. This intelligent control system minimizes energy loss while ensuring optimal system performance.
Robust & Durable Construction – Built with a ductile iron housing and high‑strength steel shaft, the pump offers enhanced wear resistance and a long service life. The pump features flange mounting and NPT ports for flexible installation. It weighs approximately 23.1 kg.
High Efficiency – The Series 45 pumps are designed for high volumetric and mechanical efficiency, providing excellent performance and energy savings. The pump also operates with low noise and vibration.
Core Functionalities
Precise Flow Control – As a variable displacement pump, its output flow is infinitely adjustable. By controlling the swashplate angle, the pump can deliver exactly the flow rate required, from zero to maximum displacement.
Energy‑Efficient Operation – The combination of load‑sensing and pressure compensation controls ensures the pump only generates the power needed for the load. This reduces energy waste, minimizes heat generation, and lowers overall power consumption.
High Power Density – The 65 cc displacement combined with 260 bar continuous pressure capability delivers exceptional power in a relatively compact package.
Overload Protection – The pump's robust design and high peak pressure capability (400 bar) allow it to withstand shock loads and transient pressure spikes without damage, protecting the hydraulic system.
High Reliability – Built with high‑quality materials and precision engineering, the pump ensures long service life and reliable operation.
Versatile System Integration – The pump can be used in a wide variety of applications and integrated with different control options to suit specific requirements.
Application Sectors
The Danfoss JR-R-S65C-LS-26-20-NN-N-3S1N0-A2NNNN-JJJ-NNN is a versatile pump widely used in high‑power mobile and industrial equipment. Its primary applications are in open‑circuit hydraulic systems.
| Industry Sector | Typical Applications |
|---|---|
| Agricultural Equipment | High‑power wheel tractors, combine harvesters (header drive, fan, and other working functions), self-propelled sprayers. |
| Construction Machinery | Backhoe loaders, wheel loaders, asphalt pavers, road milling machines, compactors, crawler dozers, small excavators. |
| Forestry Equipment | Forestry machines – auxiliary open circuit of the manipulator. |
| Material Handling | Forklifts, material handling systems. |
| Industrial Systems | CNC machine tools, steel mill hydraulic machinery, die-casting machinery, plastic machinery, blow molding equipment, paper mill hydraulic systems, oilfield equipment. |
| Municipal Vehicles | Road sweepers, garbage compactors. |
| Specialty Vehicles | High‑altitude work platforms, concrete mixer trucks. |
Performance Specifications
| Specification | Value |
|---|---|
| Manufacturer | Danfoss (Sauer‑Danfoss) |
| Series | 45 Series, J‑Frame |
| Model Code | JR‑R‑S65C‑LS‑26‑20‑NN‑N‑3S1N0‑A2NNNN‑JJJ‑NNN |
| Pump Type | Variable displacement axial piston pump |
| Circuit Type | Open circuit |
| Maximum Displacement | 65 cc/rev |
| Continuous Working Pressure | 260 bar (3,770 psi) |
| Maximum Pressure (Peak) | 400 bar (5,800 psi) |
| Speed Range | 500 – 2,800 rpm |
| Rotation Direction | Clockwise (viewed from shaft end) |
| Weight | Approx. 23.1 kg (51 lbs) |
| Housing Material | Ductile iron |
| Shaft Type | Cylindrical shaft |
| Mounting Type | Flange mounting |
| Port Type | NPT ports |
Conclusion
The Danfoss JR-R-S65C-LS-26-20-NN-N-3S1N0-A2NNNN-JJJ-NNN is a high‑performance, reliable, and efficient axial piston pump that embodies Danfoss's expertise in hydraulic technology. With its 65 cc displacement, variable displacement control, pressure rating of up to 400 bar peak, and load‑sensing capabilities, it delivers precise, energy‑efficient power for demanding open‑circuit hydraulic systems. Its defining features include a robust high‑pressure design, advanced control options, high efficiency, low noise, and durable construction. These attributes make it an ideal solution for a wide range of heavy‑duty applications — from agricultural equipment and construction machinery to material handling systems, forestry equipment, industrial automation, and municipal vehicles. As a proven and versatile solution for open‑circuit hydrostatic drives worldwide, the Danfoss JR-R-S65C-LS-26-20-NN-N-3S1N0-A2NNNN-JJJ-NNN delivers consistent performance, precise control, and long‑term dependability for equipment across numerous industries.
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