LRR030DLS1925NNN3C2AGA6NPLANNNNN Danfoss Hydraulic Pump 30cc 350bar

Product Overview

The LRR030DLS1925NNN3C2AGA6NPLANNNNN is a key model in the Danfoss Sauer Series 45 L-frame open-circuit swashplate axial piston variable displacement pump family, with 30 cm³/rev displacement. The Series 45 features a cradle swashplate design with a single servo piston and polymer-coated journal bearings, delivering infinitely variable flow from zero to maximum displacement. LRR denotes right-hand (clockwise) rotation.

This model is equipped with DLS = Load Sensing (LS) + Pressure Compensated (PC) dual control. The DLS1925 code indicates an LS stand-by pressure setting of 19 bar and a pressure compensator setting of 25 MPa (250 bar). This configuration enables the pump to automatically adjust output flow and pressure based on load demand, making it widely used in open-circuit hydraulic systems across agricultural and construction machinery.

Our product provides a fully interchangeable direct replacement for the original Danfoss Sauer Series 45 LRR030DLS1925 pump, with identical mounting dimensions, port specifications, and shaft configurations. Every unit undergoes 100% simulated duty-cycle testing—performance-validated under rated pressure, peak pressure, and full speed range to ensure volumetric efficiency, pressure-flow characteristics, control response, noise levels, and thermal characteristics meet or exceed original OEM specifications.

Technical Specifications

• Full Model: LRR030DLS1925NNN3C2AGA6NPLANNNNN

• Brand: Danfoss Sauer

• Series: Series 45 L-Frame

• Rotation: R = Right-hand (Clockwise)

• Max. Displacement: 30 cm³/rev (1.83 in³/rev)

• Rated / Nominal Pressure: 260 bar (3,771 psi)

• Peak Pressure: 350 bar (5,075 psi)

• Min. Input Speed: 500 rpm

• Max. Speed: ~3,600 rpm

• Rated Speed: 3,200 rpm

• Theoretical Flow @ Rated Speed: 96 L/min (25.4 US gal/min)

• Theoretical Torque @ Max Displacement: 0.477 Nm/bar

• Control Type: DLS = Load Sensing + Pressure Compensated

• LS Stand-By Setting: 19 bar

• PC Setting: 25 MPa (250 bar)

• Mounting Flange: SAE B 2-Bolt

• Shaft Style: Splined Shaft ANSI B92.1

• Port Position: Radial

• Housing Material: High-Strength Cast Iron

• Volumetric Efficiency @ 2,800 rpm: ≥ 96%

• Design Service Life: > 15,000 hours (dusty field conditions)

• Weight: Approx. 22–25 kg

Key Technical Advantages

1. Cradle Swashplate Design with Polymer-Coated Journal Bearings
The Series 45 L-frame pumps feature a cradle swashplate design with a single servo piston and polymer-coated journal bearings. This design significantly reduces swashplate friction, improves control response speed, and extends overall pump life. A bias spring and internal forces increase the swashplate angle, while the servo piston decreases it, enabling stepless variable control from zero to maximum displacement.

2. Load Sensing + Pressure Compensated Dual Control (DLS)
DLS control is one of the most efficient control combinations in the Series 45. Load Sensing (LS) control enables the pump to dynamically adjust output flow based on load demand—delivering flow only when the system requires it, substantially reducing energy losses. Pressure Compensated (PC) control automatically switches the pump to pressure maintenance mode when system pressure reaches the set value, protecting the system from overload. LS stand-by is set at 19 bar, with PC set at 25 MPa.

3. Superior Volumetric Efficiency & Long Service Life
The Series 45 pump features a nine-piston reciprocating design with precision-machined components, achieving up to 96% volumetric efficiency at 2,800 rpm. Abrasion-resistant coatings extend service life beyond 15,000 hours in dusty field conditions. Heavy-duty tapered roller bearings further extend the pump’s service cycle.

4. High Power Density & Wide Speed Range
Delivers 30 cm³ displacement and 3,600 rpm maximum speed in a compact L-frame package. Minimum speed of 500 rpm supports low-speed high-torque applications. Theoretical flow at rated speed reaches 96 L/min.

5. Modular Mounting & Through-Drive Capability
Available with SAE B 2-bolt flange mounting, splined or keyed shaft options, and axial or radial port configurations. Through-drive capability allows multiple pumps to be mounted in series on a single input shaft for multi-circuit system solutions.

Application Areas

The Series 45 LRR030 pump is widely used as the main working hydraulic pump across a broad range of agricultural and construction equipment:

• Agricultural Machinery: Main working hydraulic pump for Fendt, Claas, Deutz-Fahr, SAME, Lamborghini, and Valtra tractors

• Telescopic Handlers: Main working functions pump (boom lift and tilt) for JCB, Manitou, and Merlo

• Wheel Loaders: Main working hydraulics for Caterpillar, Volvo CE, and Wacker Neuson

• Backhoe Loaders: Working circuit for Case and New Holland

• Combine Harvesters: Auxiliary pump in tandem configuration for Claas and Deutz-Fahr

• Rollers/Compactors: Working functions and cooling fan drive for Bomag, Dynapac, and Hamm

• Forestry Machinery: Auxiliary hydraulic circuit for Ponsse

Expert Maintenance Tips

1. Shaft seals and all O-rings must be replaced after every disassembly.

2. Pre-lubricate all moving parts with clean hydraulic fluid before assembly.

3. Purge all air from the pump housing and prime with hydraulic oil before initial start-up to prevent dry-start damage.

4. Monitor case drain flow regularly—an abnormal increase indicates potential piston or slipper wear.

5. LS stand-by pressure setting should not be less than 15 bar to enhance system stability. For fan-drive applications, 20 bar is recommended as a starting point.

6. Ensure hydraulic system filtration meets β₁₀ ≥ 75 (ISO 4406 cleanliness code不低于 18/16/13) to maximize pump service life.

7. Regularly verify the pressure compensator setting to ensure it operates within the correct pressure range.