Product Overview
The JRLS75CPC24NNNNN3S1N9A2NNNNJJJNNN is a Danfoss JRL/JRLS series Series 45 swashplate-type axial piston variable pump from the Sauer Danfoss Series 45 J Frame product family, with a geometric displacement of 75 cm³/rev, designed for open-circuit hydraulic systems. The pump features a swashplate-type axial piston design with pressure compensator control (CPC), a rated continuous working pressure of 260 bar, a maximum peak pressure of 350 bar, a maximum self-priming speed of 2400 min⁻¹, and a theoretical flow of approximately 180 L/min.
Model code breakdown (using JRLS75CPC24NNNNN3S1N9A2NNNNJJJNNN as example): JRLS denotes Series 45 J Frame swashplate variable pump, left-hand rotation (CCW); 75 indicates 75 cm³/rev geometric displacement; CPC denotes pressure compensator control; 24 indicates pressure setting of 240 bar; NNNNN indicates standard configuration interfaces; 3 indicates SAE-C flange mounting; S1 indicates splined shaft (ANSI B92.1); N9 indicates port configuration; A2 indicates auxiliary mounting option; NNNNJJJNNN is the standard suffix configuration. The series covers displacements from 25 to 75 cm³/rev, including JRL045, JRL051, JRL060, JRL065, and JRL075, widely deployed in mobile and industrial hydraulic applications.
Each unit is manufactured to exact Sauer Danfoss Series 45 specifications, with mounting flange (SAE-C 2-bolt/4-bolt), splined drive shaft, port locations, and control interfaces fully dimensionally matched for drop-in interchangeability. Every pump undergoes 100% simulated load testing on our test bench, validating flow characteristics, pressure compensator response accuracy, and sealing integrity across the 260 bar rated and 350 bar peak pressure ranges before shipment.
Technical Specifications
JRLS75CPC24NNNNN3S1N9A2NNNNJJJNNN Core Specifications
Model: JRLS75CPC24NNNNN3S1N9A2NNNNJJJNNN
Series: Danfoss Series 45 J Frame (JRLS Series)
Pump Type: Swashplate-type axial piston variable pump
Geometric Displacement: 75 cm³/rev (4.58 in³/rev)
Theoretical Flow (at 2400 rpm): 180 L/min
Rated Working Pressure (Continuous): 260 bar (3770 psi)
Maximum Working Pressure (Peak): 350 bar (5075 psi)
Maximum Speed (Continuous): 2400 min⁻¹
Maximum Speed (Intermittent): 2880 min⁻¹
Minimum Speed: 500 min⁻¹
Control Type: CPC — Pressure Compensator, setting 240 bar
Circuit Type: Open circuit
Rotation Direction: Left-hand (CCW, viewed from shaft end)
Mounting Flange: SAE-C 2-bolt/4-bolt flange
Drive Shaft: Splined shaft (ANSI B92.1, t14 12/24dp)
Port Position: Radial
Weight (approx.): 29 kg
JRL/JRLS Series 45 Full Displacement Range
JRL045/JRLS45: 45 cm³/rev, rated pressure 260 bar, peak 350 bar, max speed 2650 min⁻¹
JRL051/JRLS51: 51 cm³/rev, rated pressure 260 bar, peak 350 bar, max speed 2650 min⁻¹
JRL060/JRLS60: 60 cm³/rev, rated pressure 260 bar, peak 350 bar, max speed 2400 min⁻¹
JRL065/JRLS65: 65 cm³/rev, rated pressure 260 bar, peak 350 bar, max speed 2400 min⁻¹
JRL075/JRLS75: 75 cm³/rev, rated pressure 260 bar, peak 350 bar, max speed 2400 min⁻¹
Series 45 General Specifications
Displacement Range: 25–75 cm³/rev (J Frame)
Rated Pressure Range: 26–31 MPa (260–310 bar)
Maximum Pressure Range: 35–40 MPa (350–400 bar)
Speed Range: 500–3360 min⁻¹
Control Options: LS (Load Sensing), PC (Pressure Compensator), CPC (Pressure Compensator Control)
Data referenced from Danfoss Series 45 official technical documentation. The series is renowned for high efficiency, compact lightweight construction, and proven reliability in open-circuit hydraulic systems.
Key Technical Advantages
1. Pressure Compensator Control (CPC) for Energy-Efficient Operation
The JRLS75CPC24 features pressure compensator control. When system pressure reaches the set value (240 bar for this model), the swashplate mechanism automatically reduces the tilt angle, decreasing displacement to only the flow required for system leakage compensation rather than full displacement output. This characteristic significantly reduces power consumption during holding or light-load conditions, effectively controlling oil temperature rise and extending hydraulic system service life. The pressure compensator control spool is precision-machined for high setting accuracy and repeatability, ensuring stable system pressure over extended operation.
2. Swashplate Axial Piston Design with Excellent Suction Performance
The JRLS75 utilizes a swashplate-type axial piston design with a rotating cylinder block and stationary swashplate, providing excellent suction performance. Pump flow is proportional to drive speed and swashplate angle, with infinitely variable flow achieved by adjusting the swashplate angle. Piston-to-bore clearances are controlled to micron-level tolerances through precision lapping, maintaining high volumetric efficiency under rated conditions. The swashplate is supported by high-capacity bearings, minimizing control torque and ensuring short control response times that quickly track system load changes.
3. Compact Lightweight Design with High Power Density
The JRLS75 delivers 75 cm³/rev displacement with a single pump weight of approximately 29 kg, achieving a leading power density among comparable products with compact installation dimensions. The lightweight design reduces overall vehicle or equipment weight, contributing to improved fuel economy and handling performance. The pump body supports both SAE-C 2-bolt and 4-bolt flange mounting options to accommodate different OEM mounting interface requirements.
4. High-Quality Splined Drive Shaft with Long-Life Bearings
The JRLS75 features a splined drive shaft conforming to ANSI B92.1 standards (t14 12/24dp), with spline teeth precision-machined and heat-treated to ensure reliable torque transmission and long service life. The pump incorporates high-capacity internal bearings optimized to reduce roller edge loads, significantly extending bearing service life. Sliding contact surfaces receive specialized surface treatment to maintain stable clearances under continuous high-pressure operation, reducing leakage and wear.
5. OEM Interchangeability and 100% Simulated Load Testing
The JRLS75CPC24NNNNN3S1N9A2NNNNJJJNNN features mounting flange dimensions (SAE-C 2-bolt/4-bolt), splined drive shaft specifications, inlet/outlet port positions, and pressure compensator control interfaces fully matched to the original Sauer Danfoss pump, enabling direct replacement without piping or bracket modification. Every pump undergoes 100% simulated load testing on our test bench, validating flow characteristics, pressure compensator response accuracy, and sealing integrity across the 260 bar rated and 350 bar peak pressure ranges, ensuring first-time pass on commissioning.
Application Areas
The JRLS75CPC24NNNNN3S1N9A2NNNNJJJNNN and JRL/JRLS series are widely deployed in the following machinery and systems:
Construction Equipment: Main hydraulic pumps for hydraulic excavators, wheel loader working hydraulic systems, bulldozer hydraulic drives
Mobile Machinery: Combine harvester travel drives, tractor hydraulic suspension systems, grape harvester hydraulic circuits
Road Machinery: Asphalt paver travel drives, road roller vibration and travel circuits
Material Handling: Telescopic handler hydraulic transmissions, lifting machinery hydraulic systems
Industrial Hydraulics: Injection molding machine hydraulic power units, die-casting machine hydraulic systems, forging machinery hydraulic drives
Agricultural Machinery: Various mobile hydraulic equipment requiring open-circuit variable piston pumps
Expert Maintenance Tips
Pre-Installation Checks:
Verify pump rotation direction is left-hand (CCW, viewed from shaft end). Reverse operation is not permitted.
Fill the pump housing with clean hydraulic oil (ISO VG46 anti-wear hydraulic oil recommended) before installation to prevent dry-start damage to piston pairs and valve plate.
Check drive shaft-to-coupling alignment. Use a flexible coupling; radial deviation ≤ 0.05 mm, angular deviation ≤ 0.5°.
Verify that the pressure compensator setting matches system requirements. This model is factory-set at 240 bar.
Pressure Compensator Adjustment (CPC Control):
The pressure compensator setting should be 10%–15% below the system high-pressure relief valve setting. After adjustment, tighten the sealing nut and record the setting dimension for future maintenance reference.
Periodically check the pressure compensator control spool for smooth movement and freedom from sticking.
Maintain system cleanliness at NAS Class 9 (ISO 18/15) or better to prevent contaminants from causing spool sticking.
Hydraulic Fluid and Filtration:
Use ISO VG46 anti-wear hydraulic oil with a viscosity range of 10–65 cSt.
Maintain system cleanliness within NAS Class 9 (ISO 18/15).
The suction port must be equipped with a 100 μm (150 mesh) or finer reservoir-type filter; the return line must have a line-type filter of 10 μm or finer.
Replace all hydraulic fluid after the first 100 hours, then every 2000 hours or annually.
Operational Monitoring:
Continuous working pressure must not exceed 260 bar; short-term peak pressure must not exceed 350 bar.
Case drain pressure should normally remain below 2 bar. Ensure the drain line is unobstructed and returns below the oil level in the reservoir.
Pump housing temperature must not exceed 90°C. If exceeded, inspect the cooling system and circuit leakage.
Every 1000 hours, verify pressure compensator settings for drift and re-adjust if necessary.
