SNP2NN/8,0RN02AAP1F5F4NNNN/NNNNN Danfoss Hydraulic Gear Pump 8.4cc 250bar

Product Overview

The SNP2NN/8,0RN02AAP1F5F4NNNN/NNNNN is a Danfoss SNP2NN Series (Group 2) aluminum-bodied fixed displacement external gear pump. Originally part of the Sauer-Danfoss and Turolla product lines, it now belongs to the Danfoss GearMe product family.

The SNP2NN Series features a high-strength extruded aluminum body, cover, and flange, delivering an optimal balance of lightweight construction and structural robustness. The pressure-balanced design ensures sealing pressure automatically adapts to operating conditions, improving overall efficiency and minimizing energy consumption. The series offers displacements from 3.9 to 25.2 cc/rev, with rated pressures up to 250 bar and maximum speeds up to 4,000 rpm. The SNP2NN Series is ideal for small to medium off-highway vehicles and industrial applications.

As an original specification model within the Danfoss SNP2NN line, this product enables direct form-fit-function interchangeability with original Danfoss/Turolla units—no modifications to piping or mounting interfaces required. Our replacement solution strictly adheres to Danfoss technical standards and undergoes 100% simulated in-service testing to ensure performance, reliability, and service life identical to OEM products. It is the ideal choice for hydraulic system maintenance and upgrades in agricultural machinery, construction equipment, and industrial applications.

Technical Specifications 

Applicable Model (Primary):

• SNP2NN/8,0RN02AAP1F5F4NNNN/NNNNN

Reference Part Numbers:

• 111.20.278.00

• 111.20.A32.00

Series Technical Specifications (per Danfoss official documentation):

• Product Series: Danfoss SNP2NN Aluminum Gear Pump

• Pump Type: Fixed Displacement External Gear Pump

• Body Material: High-Strength Extruded Aluminum Alloy

• Gear Material: Case-Hardened Steel Gears — wear, abrasion and contamination resistant

• Bearings: Teflon®-coated bushings for extended life under extreme temperature, pressure and speed conditions

• Mounting Flange: 02 — German 4-bolt flange, pilot diameter 80mm

• Drive Shaft: AA — Cylindrical shaft with key

• Rotation: R — Clockwise (viewed from shaft end)

• Shaft Seal: P1 — Single shaft seal

• Ports: F5 (Inlet) / F4 (Outlet) — Metric female ports

• Integral Valve: N — No integral pressure relief valve

This Model Detailed Specifications:

• Geometric Displacement: 8.4 cm³/rev (model code 8,0; actual displacement 8.4cc)

• Rated Operating Pressure: 25 MPa (250 bar / 3,625 psi)

• Maximum Peak Pressure: 28 MPa (280 bar / 4,060 psi)

• Maximum Speed: 4,000 min⁻¹

• Minimum Speed: Approx. 800 min⁻¹ (at rated pressure)

• Theoretical Flow (@4,000 rpm): Approx. 33.6 L/min

• Operating Temperature Range: -20°C to +80°C (standard seals)

• Fluid Compatibility: Mineral hydraulic oil

• Filtration Requirement: Per Danfoss standards

• Weight (SNP2NN Series): 2.3 – 3.3 kg

Key Technical Advantages

1. High-Strength Extruded Aluminum Body — Lightweight with Superior Strength
The SNP2NN Series features a high-strength extruded aluminum body, cover, and front flange, delivering an optimal balance of maximum strength and minimum weight. The lightweight design simplifies installation and reduces overall equipment load, making it particularly suitable for weight-sensitive mobile hydraulic applications.

2. Pressure-Balanced Design for High Volumetric Efficiency
The pressure-balanced design ensures sealing pressure automatically adapts to operating conditions, improving overall efficiency and minimizing energy consumption. Pressure balance plates improve internal sealing, reduce leakage, and maintain operating pressure under high flow output.

3. Teflon®-Coated Bushings — Extended Life Under Extreme Conditions
Teflon®-coated bushings extend service life under extreme temperature, pressure, and speed conditions. The integrated gear shaft design minimizes deformation under pressure.

4. Case-Hardened Steel Gears with Excellent Contamination Resistance
Case-hardened steel gears provide protection against wear, abrasion, and fluid contamination. The SNP Series exhibits low sensitivity to fluid contamination, maintaining reliable operation under typical industrial fluid cleanliness conditions.

5. Modular Design with Flexible Multi-Pump Configurations
The SNP2NN Series supports single, tandem, and multiple pump configurations, stackable with SNP1NN, SNP2NN, and SNP3NN pumps. The modular design and compact short versions enhance flexibility. Standardized mounting dimensions ensure complete interchangeability with original products.

Application Areas

• Agricultural Machinery: Tractor hydraulic systems, combine harvesters, sprayers, balers

• Construction Equipment: Small to medium excavators, loaders, telescopic handlers

• Material Handling Equipment: Forklift hydraulic systems

• Municipal & Sanitation Vehicles: Street sweepers, cleaning vehicles

• Industrial Hydraulic Systems: Small to medium industrial hydraulic power units

• Off-Highway Vehicles: Working and steering circuits

Expert Maintenance Tips

1. Installation Precautions

• The SNP2NN Series is a uni-directional rotation pump—verify that the system’s required rotation direction matches the pump’s identification marking before installation. This model features clockwise rotation (R).

• Ensure coaxial alignment between the pump and drive shaft; flexible couplings are recommended to avoid radial loads on the pump shaft.

• The suction line diameter must not be smaller than the pump inlet port; minimum speed should not fall below 800 rpm to prevent cavitation.

2. Fluid Management

• Use mineral hydraulic oils conforming to ISO/DIN standards.

• System fluid cleanliness must meet Danfoss-recommended standards.

• Prime the pump by filling the housing with hydraulic fluid through the suction port before initial start-up. Never run the pump dry.

3. Start-Up & Commissioning

• Use jog start method for initial start-up; verify correct rotation direction before continuous operation.

• Allow the pump to run under no-load (low pressure) conditions for 2-3 minutes to purge air and ensure proper lubrication.

• Gradually increase to operating pressure while monitoring noise, temperature, and system pressure for normal operation.

4. Routine Maintenance

• The SNP2NN gear pump itself is maintenance-free; however, regular maintenance of the entire hydraulic system is essential for trouble-free pump operation.

• Inspect system fluid cleanliness and condition every 1,000-2,000 operating hours.

• Regularly replace return line filters and suction strainers to prevent contaminant ingress into the pump body.