SNP3NN SNP2NN Hydraulic Gear Pump | Danfoss Replacement | 17cc 26cc High Pressure Pump

The SNP/SNW Series (including SNP2NN and SNP3NN) by Chengyuan Hydraulic represents a range of high-performance aluminum gear pumps designed for the most demanding mobile hydraulic applications. Engineered to be 100% interchangeable with Danfoss (Turolla) technical standards, these pumps offer exceptional power density and reliability. Every unit undergoes 100% simulated condition testing to guarantee peak performance under real-world loads. With a rated pressure of 25 MPa, the SNP series combines lightweight design with heavy-duty durability, making it a premier replacement choice for global OEM machinery.

Technical Specifications 

• Model A: SNP3NN/026RN01BA (Group 3)

  • Displacement: 26.2 cc/rev

  • Rated Pressure: 25 MPa (3625 psi)

  • Peak Pressure: 27 MPa (3915 psi)

  • Max Speed: 3000 RPM

  • Shaft Type: 1:8 Tapered Shaft

• Model B: SNP2NN/017RN03CA (Group 2)

  • Displacement: 17.0 cc/rev

  • Rated Pressure: 25 MPa (3625 psi)

  • Peak Pressure: 28 MPa (4060 psi)

  • Max Speed: 3500 RPM

  • Shaft Type: SAE A Spline/Parallel Shaft

• Housing Material: High-strength Extruded Aluminum Alloy

• Efficiency: Volumetric Efficiency $\ge 95\%$

Key Technical Advantages

• Floating Side Plate Compensation: Features an advanced axial compensation mechanism that automatically adjusts clearances. This ensures consistent volumetric efficiency of over $95\%$ across the entire pressure and temperature range.

• Heavy-Duty Three-Piece Construction: The pump body is crafted from premium extruded aluminum with reinforced end covers. This robust design handles peak pressures up to 28MPa while providing superior heat dissipation to keep the system running cool.

• Precision-Engineered Gears: High-tensile steel gears are precision ground to a micron-level finish. This minimizes flow ripples and vibration, resulting in an ultra-quiet operation (typically below $75 \text{ dB(A)}$).

• High-Load DU Bushings: Equipped with world-class DU composite bearings that offer excellent self-lubricating properties and radial load capacity. This prevents shaft wear and significantly extends the service life in harsh outdoor environments.

Application Areas

• Material Handling: Primary lift and steering pumps for electric and internal combustion forklifts.

• Agricultural Equipment: Tractor hydraulic power take-off (PTO) and harvester header lift systems.

• Construction Machinery: Auxiliary circuits for rollers, mini-excavators, and street sweepers.

Expert Maintenance Tips

• Shaft Alignment: Ensure the alignment between the pump shaft and drive motor is within $0.05 \text{ mm}$. Never use a hammer to seat couplings, as this can damage the internal thrust plates.

• Pre-Lubrication: Fill the pump with clean hydraulic oil before initial startup. Always jog the motor to verify that the rotation matches the arrow on the pump body. Never run the pump dry.

• Filtration Standard: Use ISO VG46 anti-wear hydraulic oil. Ensure system filtration is maintained at $20 \mu\text{m}$ or better. Regularly monitor oil for signs of aeration or emulsification.