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Help CenterDanfoss JR-L-S75C-LS-21-25-NN-N3-S1NE-A2NNNN-JJJ-NNN Hydraulic Axial Piston Pump
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Danfoss JR-L-S75C-LS-21-25-NN-N3-S1NE-A2NNNN-JJJ-NNN Hydraulic Axial Piston Pump
Overview
The Danfoss JR-L-S75C-LS-21-25-NN-N3-S1NE-A2NNNN-JJJ-NNN is a high-performance, variable-displacement axial piston pump from Danfoss's renowned Series 45 range. Engineered for open-circuit hydraulic systems, this pump is designed to deliver precise, reliable, and efficient power for a wide range of demanding mobile and industrial applications.
Technical Features
Axial Piston, Variable Displacement 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 needs, improving efficiency. The Series 45 "J-frame" design is known for its high performance and durability.
Model Code Breakdown – The model number provides specific details about the pump's configuration:
JR: J-frame axial piston open-circuit pump.
L: Counter-clockwise rotation (when viewed from the shaft end).
S75C: Displacement of 75 cc/rev and a maximum continuous rated pressure of 260 bar.
LS: Pressure-compensated / load-sensing control type.
21: Pressure compensator setting of 210 bar.
25: Load sensing (LS) setting of 25 bar.
High Pressure Capability – The pump has a maximum continuous pressure rating of 260 bar (3,770 psi), with a pressure compensator range of 100-280 bar and an LS pressure range of 10-40 bar. Some sources indicate a higher capability, with a minimum pressure of 310 bar and a maximum of 400 bar. The pump can operate at temperatures up to 400°F (204°C).
Displacement & Performance – With a maximum displacement of 75 cc/rev, this pump provides substantial flow for high-power applications. The Series 45 family offers displacements from 25 to 147 cm³/rev. It has a maximum shaft speed of up to 3600 rpm.
Variable Control Technology – The pump supports advanced control options, including pressure compensation (automatically adjusting displacement to maintain stable pressure) and load-sensing (regulating output pressure based on actual load demands). This intelligent control system minimizes energy loss while ensuring optimal system performance.
Robust & Durable Construction – Built with high-quality materials such as ductile iron for the pistons, stainless steel, cast iron, and bronze, the pump offers enhanced wear resistance and a long service life. The housing is made of cast iron.
Open Circuit & Bi-Directional Capability – Designed for open-circuit applications where fluid returns to the tank, the pump is configured for counter-clockwise rotation (as indicated by the "L" in the model code).
Versatile Mounting & Porting – The Series 45 pumps offer a variety of connecting flanges and shaft types for flexible installation. The pump features mechanical or packing seals and can be direct or belt-driven.
Compact & Lightweight – The pump weighs approximately 23.13 kg (51 lbs), making it suitable for space-constrained installations.
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 improves overall system efficiency.
High Power Density – The 75 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 allow it to withstand shock loads and transient pressure spikes without damage, protecting the hydraulic system.
Low Noise Operation – The pump is engineered for quiet operation, maintaining a low noise level even under high-pressure conditions. This is particularly important for indoor or noise-sensitive environments.
High Reliability – Danfoss products undergo strict quality control, ensuring the pump can withstand high pressure and high load working environments with a long service life.
Strong Adaptability – The pump can adapt to a variety of working environments and media, with a wide operating temperature range and good anti-pollution ability.
Easy Maintenance – The pump is designed with ease of maintenance in mind, simplifying service and reducing downtime.
Application Sectors
The Danfoss JR-L-S75C-LS-21-25-NN-N3-S1NE-A2NNNN-JJJ-NNN is a versatile pump widely used across numerous industries that require reliable and efficient hydraulic power. Its primary applications are in open-circuit hydraulic systems for mobile and industrial equipment.
| Industry Sector | Typical Applications |
|---|---|
| Construction Machinery | Excavators, wheel loaders, backhoe loaders, cranes, pavers, road rollers, compactors, and bulldozers. |
| Agricultural Equipment | Tractors, combine harvesters, forage harvesters, and other heavy agricultural machinery. |
| Material Handling | Forklifts, conveyor systems, stackers, and port machinery. |
| Industrial Systems | Injection molding machines, die-casting machines, machine tools, and automated production lines. |
| Mining & Energy Equipment | Rock drills, crushers, and other mining machinery. |
| Marine Machinery | Hydraulic steering, cranes, and other shipboard equipment. |
| Municipal Equipment | Street sweepers and other municipal vehicles. |
| Forestry & Drilling | Forestry machines and drilling rigs. |
Performance Specifications (Model-Specific)
| Specification | Value |
|---|---|
| Manufacturer | Danfoss (Sauer-Danfoss) |
| Series | 45 Series, J-Frame |
| Model Code | JR-L-S75C-LS-21-25-NN-N3-S1NE-A2NNNN-JJJ-NNN |
| Pump Type | Variable displacement axial piston pump |
| Circuit Type | Open circuit |
| Maximum Displacement | 75 cc/rev |
| Maximum Continuous Pressure | 260 bar (3,770 psi) |
| Maximum Pressure (Peak) | 400 bar (5,800 psi) |
| Rotation Direction | Counter-clockwise (L) |
| Weight | Approx. 23.13 kg (51 lbs) |
| Maximum Temperature | Up to 400°F (204°C) |
| Control Type | Pressure compensated / Load sensing (LS) |
| Pressure Compensator Setting | 210 bar (21) |
| Load Sensing Setting | 25 bar (25) |
Conclusion
The Danfoss JR-L-S75C-LS-21-25-NN-N3-S1NE-A2NNNN-JJJ-NNN is a high-performance, reliable, and efficient axial piston pump that embodies Danfoss's expertise in hydraulic technology. With its 75 cc displacement, variable displacement control, pressure rating of up to 260 bar (with peak capability up to 400 bar), and load-sensing/pressure compensation 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 construction machinery, agricultural equipment, and material handling systems to industrial machinery, mining equipment, marine systems, and municipal vehicles.
As a proven and versatile solution for open-circuit hydrostatic drives worldwide, the Danfoss JR-L-S75C-LS-21-25-NN-N3-S1NE-A2NNNN-JJJ-NNN delivers consistent performance, precise control, and long-term dependability for equipment across numerous industries.
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