Product Overview
The JRR060BBS3020NNN3C2N2A8NNNNNNNNNN and JRRS60BAL2430NNE3S1N9A2N NNN JJJ NNC both belong to the Sauer Danfoss Series 45 open-circuit axial piston variable displacement pump family, Frame J configuration, with a displacement of 60 cc/rev (3.66 in³/rev). The Series 45 family covers displacements from 25 cm³ to 147 cm³, with continuous operating pressures up to 310 bar and peak pressures reaching 400 bar. These pumps feature a single servo piston design with a cradle-type swashplate set in polymer-coated journal bearings.
The key distinction between the two models lies in their control method: JRR060BBS3020NNN3C2N2A8NNNNNNNNNN utilizes pressure compensator (PC) control, while JRRS60BAL2430NNE3S1N9A2N NNN JJJ NNC features load sensing (LS) control. Both models share identical mounting interfaces, drive shaft configurations, and external dimensions—only the control spool and adjustment method differ.
Every pump undergoes 100% simulated operating-condition testing before shipment, including rated pressure hold, flow characteristic verification, and control response validation—delivering immediate reliability upon installation.
Technical Specifications
Model Identification:
JRR060BBS3020NNN3C2N2A8NNNNNNNNNN — 60 cc/rev, pressure compensator (PC) control, clockwise rotation, SAE 2-hole mounting flange
JRRS60BAL2430NNE3S1N9A2N NNN JJJ NNC — 60 cc/rev, load sensing (LS) control, clockwise rotation, SAE 2-hole mounting flange
Displacement:
Pressure Ratings:
Speed Range:
Theoretical Flow:
Control Types:
JRR060: Pressure Compensator (PC) Control — Pump automatically reduces displacement to maintain constant pressure when system pressure reaches the set value
JRRS60: Load Sensing (LS) Control — Automatically adjusts displacement based on load pressure signal, delivering only the flow required by actuators
Optional controls: pressure compensation, load sensing, power control, electro-proportional control, etc.
Structural Parameters:
Pump type: Open-circuit swashplate axial piston variable displacement
Series: Series 45 Frame J
Mounting flange: SAE 2-bolt (SAE B 2-bolt)
Drive shaft: SAE splined (13T 16/32) or keyed
Rotation: Clockwise (right-hand), viewed from shaft end
Port position: Axial (rear) or side
Weight: Approximately 28.0 kg
Through-drive: Supported (optional pass-through drive for multi-circuit systems)
Key Technical Advantages
1. Precise Model Coding Enables 100% Drop-in Interchange
The Series 45 model code system encompasses displacement, control type, mounting flange, drive shaft, port position, rotation direction, and control pressure settings. The mounting flange, drive shaft spline, and port layout of JRR060BBS3020NNN3C2N2A8NNNNNNNNNN and JRRS60BAL2430NNE3S1N9A2N NNN JJJ NNC are identical, enabling direct bolt-on replacement of original Sauer Danfoss pumps without piping modification or adapter plates.
2. High Power Density in Compact Package
The Series 45 Frame J delivers 310 bar continuous working pressure and 400 bar peak pressure at 60 cc/rev displacement. The one-piece housing design reduces leak points and simplifies maintenance. The compact rotating group achieves high power output within constrained installation spaces, suitable for the tight engine compartments of mobile machinery.
3. Load Sensing Control Significantly Reduces Energy Consumption
The LS load sensing control on JRRS60 automatically adjusts pump displacement based on actual load pressure at the actuator, delivering only the required flow. When actuators stop, the pump reduces displacement to near zero, maintaining only standby pressure—significantly reducing energy loss and heat generation compared to fixed displacement pump systems.
4. Precision Machining for Extended Service Life
Piston-cylinder interfaces undergo precision lapping, and the valve plate is optimized to reduce pressure pulsation and flow ripple. The swashplate is supported by polymer-coated journal bearings, effectively reducing friction coefficients. Heavy-duty taper roller shaft bearings provide long service life. As the cylinder block rotates on the drive shaft, nine pistons sequentially complete suction and discharge strokes, maintaining stable volumetric efficiency at 310 bar.
5. Through-Drive Capability for Multi-Circuit Systems
Series 45 pumps support through-drive configurations, enabling tandem installation of a second pump or other hydraulic component behind the primary pump. In typical configurations such as Claas Lexion, Case IH, and New Holland CR series combine harvesters, the main closed-circuit pump drives the undercarriage while the JRR060 serves as an auxiliary open-circuit pump for the working hydraulics—the header, elevator, and other actuators of the threshing unit.
Application Areas
Combine harvester hydraulic systems (Claas Lexion, Case IH, New Holland CR series)
Wheel loaders and backhoe loaders (Volvo L70/L90, Case 580/590 series)
Telescopic handlers (JCB 530/540 series) and agricultural tractors
Tractors and sprayers (Case IH Magnum/Puma, New Holland T7/T8 series)
Injection molding and die-casting machine hydraulic power units
Cold milling machines and road construction equipment
Forestry machinery, sweepers, and mini-excavators
Expert Maintenance Tips
1. Pre-Installation Model Verification
Verify the complete model code on the pump nameplate before installation. Pay particular attention to control type (JRR060 = pressure compensator; JRRS60 = load sensing), rotation direction, drive shaft spline, and mounting flange specification. The mounting interfaces of both models are identical, but control line connections differ: the LS port of JRRS60 must be connected to the load sensing signal line.
2. Hydraulic Fluid Cleanliness Requirements
Use ISO VG 32-68 anti-wear hydraulic oil with cleanliness level no lower than ISO 4406 22/18/13. Suction filter rating should be no coarser than 10 μm. Recommended operating viscosity range: 9-110 cSt. Operating temperature range: -40°C to +82°C, with intermittent maximum of +104°C.
3. LS Line Connection (JRRS60 Specific)
The LS port line of the load sensing pump must be connected to the system load signal port. The line must remain sealed with no leakage. LS line leakage prevents the pump from properly responding to load demand, causing sluggish system operation or abnormal pressure rise. The LS standby pressure is factory-set at 20 bar; adjustments should be made via the adjustment screw on the control valve.
4. First Start-Up Procedure
Fill the pump housing with clean hydraulic oil before first start. Run at 500-800 rpm unloaded for 5-10 minutes to purge air. Confirm no suction line leakage and steady oil flow from the case drain line before gradually increasing speed and loading. Case drain back pressure must not exceed 0.5 bar, and the drain line end should always remain submerged below the reservoir oil level.
5. Routine Maintenance
Replace hydraulic oil filters every 2,000 operating hours or annually. Periodically inspect the pump exterior for leaks and check the drive shaft seal for aging or cracks. If flow decline or pressure instability is observed, prioritize inspection of the valve plate and piston-cylinder wear. Recommended overhaul interval: no more than 8,000 operating hours or 5 years.
