SNW211367823 Sauer Danfoss SNW Series Hydraulic Motor Replacement

Product Overview

This SNW/SNZ series high-performance gear hydraulic motor is a direct drop-in replacement for Sauer Danfoss (now Danfoss Power Solutions) SNW series gear pumps and motors. It fully covers SNW1NN, SNW2NN, SNW3NN, and SNZ series displacement configurations, and is compatible with original equipment part numbers including SNW211367823, SNW194662958, SNW192958250, SNW204928775, 56153925.3327409, and 11203263.

The SNW series features a high-strength aluminum alloy housing and precision gear set design with hydraulic clearance compensation between the gears and aluminum housing, ensuring high volumetric efficiency under high-pressure, high-speed operating conditions. The displacement range covers 0.25 to 200 cm³/rev, delivering high power density and excellent cost-effectiveness. Every unit undergoes 100% simulated working-condition bench testing before shipment, verifying that displacement, pressure, speed, and torque characteristics fully match original Sauer Danfoss specifications.

Technical Specifications 

SNW/SNZ Series General Parameter Range (Based on Sauer Danfoss Official Technical Data):

• Model Series: SNW1NN / SNW2NN / SNW3NN / SNZ / SNP / SNM

• Displacement Range: 0.25–200 cm³/rev (covering full SNW1NN, SNW2NN, SNW3NN range)

• Rated Pressure: 200–250 bar (SNW2NN series, reference at 19 cc/rev displacement)

• Maximum Pressure: 250 bar

• Speed Range: 500–3000 rpm (SNW2NN series)

• Max Speed (SNW3NN series): 3000 rpm

• Working Pressure Range: Up to 35 MPa (SNW3NN/075 reference)

• Control Method: Fixed displacement, bidirectional rotation (SNM series) or unidirectional (SNU series)

• Mounting: SAE standard flange

• Material: High-strength aluminum alloy housing

• Weight: Reference 55 kg (SNW3NN/075 specification)

Specific Model Number Reference:

• SNW211367823: Standard SNW series specification, exact displacement confirmed by complete model code, drop-in interchangeable

• SNW194662958: SNW series, suitable for construction machinery and industrial drive systems

• SNW192958250: SNW series, compatible with Sauer Danfoss original interfaces

• SNW204928775: SNW series, compatible with multiple mounting flange and shaft configurations

• 56153925.3327409 / 11203263: Same-series compatible part numbers, direct interchangeability

Note: The above represents the general parameter range for the SNW/SNZ series. Exact displacement, pressure, and speed parameters for specific model numbers must be confirmed against the Sauer Danfoss official technical manual using the complete model code (e.g., SNW2NN/019RN01BQNNF5F4, SNW3NN/033LN07BNNNA4A3). We perform one-on-one verification based on your equipment nameplate information before shipment to ensure exact matching.

Key Technical Advantages

1. Hydraulic Clearance Compensation Technology
Hydraulic clearance compensation between the gears and aluminum housing automatically reduces axial clearance as working pressure increases, maintaining high volumetric efficiency and significantly reducing internal leakage. This technology ensures stable output performance even at 250 bar operating pressure.

2. High Power Density Compact Design
The aluminum alloy housing combined with precision gear sets achieves an extremely high power-to-weight ratio. The displacement range covers 0.25 to 200 cm³/rev, delivering maximum output torque within limited installation space, ideal for mobile equipment with strict space constraints.

3. Long-Life High-Wear-Resistant Bearing System
Utilizing high-performance anti-wear bearings that resist burnout under high-pressure and high-speed operating conditions, ensuring long-term reliable operation. The bearing system is optimized to simultaneously handle radial and axial loads, suitable for direct drive and gear-driven mounting configurations.

4. Low Noise Smooth Operation
Precision-ground gear sets combined with optimized tooth profile design effectively reduce pressure pulsation and operating noise. Gear meshing accuracy reaches micron-level tolerances, ensuring smooth, low-vibration operation across the full speed range, meeting the stringent noise control requirements of modern industrial equipment.

5. Modular Multi-Stage Configuration Compatibility
The SNW series supports single, tandem (SNW2NN+SNP2NN), and triple (SNW3NN+SNQ3NN+SNP2NN) modular configurations, flexibly adapting to multi-circuit hydraulic system requirements, reducing piping connections, and improving system integration.

Application Areas

• Construction Machinery: Wirtgen cold planers, excavator hydraulic drive systems

• Building Equipment: Concrete pump trucks, rotary drilling rigs, trenchless pipe laying equipment

• Agricultural Equipment: Combine harvesters, tractor hydraulic systems

• Material Handling: Forklifts, aerial work platforms, winch drives

• Industrial Equipment: Injection molding machines, machine tool hydraulic systems, lubrication systems

• Municipal Equipment: Snow removal vehicles, street sweepers, hydraulic drive units

Expert Maintenance Tips

Installation:

• Verify that flange pilot, shaft dimensions, and port specifications precisely match the original Sauer Danfoss SNW series. When interchanging part numbers such as 56153925.3327409 or 11203263, provide original nameplate photos so we can confirm interface compatibility.

• Prime the housing with clean hydraulic oil before first startup. Perform a 30-minute run-in at 30% maximum working pressure before full-load operation.

Operation & Maintenance:

• Use ISO VG 46 anti-wear hydraulic oil with cleanliness no lower than NAS Class 9 or ISO 18/15.

• Regularly monitor system pressure; continuous working pressure must not exceed 250 bar, and peak pressure should not exceed 110% of rated value for short durations.

• Inspect gear set wear every 1,000 operating hours. If volumetric efficiency drops by more than 15%, replace components promptly.

• Maintain oil temperature below 80°C to prevent viscosity degradation and seal aging.

Storage:

• For extended storage, install dust plugs on all ports and fill the housing with rust-preventive oil. Store at ambient temperatures between -20°C and +60°C, away from direct sunlight and moisture.