NSH10M-NSH14M-NSH16M-NSH32M-NSH40M-NSH50M Gear Pump 160bar

Product Overview

The NSH10M / NSH14M / NSH16M / NSH32M / NSH40M / NSH50M series gear pumps are high-performance external gear pumps engineered to Russian NSh (НШ) standards, widely used in MTZ tractors, three-axle truck tractors, loaders, and agricultural machinery. The numbers in the model code (10, 14, 16, 32, 40, 50) indicate nominal displacement in cm³/rev, while the “M” suffix denotes aluminum alloy housing and 160 bar continuous pressure rating.

Engineered with a high-strength aluminum alloy housing and precision-ground gear pairs, the pump delivers compact structure, light weight, high efficiency, and low noise. NSH series pumps are specifically designed for mineral oil applications in hydraulic systems of tractors, combines, loaders, graders, and other equipment.

Every unit is manufactured to original equipment specifications (GSTU/GOST standards), ensuring 100% drop-in interchangeability with genuine NSH series pumps without any system modifications (covering models from 6 to 100 cm³/rev). Each pump undergoes rigorous 100% simulated duty-cycle testing on dedicated test benches to validate pressure-flow-efficiency performance curves.

Brand Disclaimer: This product is a high-quality compatible replacement engineered for full interchangeability with original NSH (НШ) series equipment. All NSH/НШ brand names and model codes are referenced solely to indicate compatibility and interchangeability. This product is manufactured by an independent producer.

Technical Specifications 

NSH M Series General Specifications

• Brand Series: NSH (НШ) M Series Gear Pump

• Pump Type: Fixed Displacement External Gear Pump

• Design Standard: GSTU / GOST Standards

• Housing Material: High-Strength Aluminum Alloy

• Hydraulic Fluid: Mineral Oil

• Continuous Pressure (P₁) : 160 bar

• Intermittent Pressure (P₂) : 210 bar

• Peak Pressure (P₃) : 250 bar

• Minimum Speed (n_min) : 500 min⁻¹

• Rotation Direction: Clockwise (CW) / Counterclockwise (CCW) available

• Mounting: Flange-mounted

• Seals: NBR (Nitrile rubber)

Model-Specific Specifications

NSH10M (НШ10М-3)

• Displacement: 10 cm³/rev

• Maximum Speed (n_max): 3,600 min⁻¹

• Max Flow Rate: Approx. 36 L/min @ 3,600 rpm

• Weight: Approx. 3.5 kg

NSH14M (НШ14М-3)

• Displacement: 14 cm³/rev

• Maximum Speed (n_max): 3,600 min⁻¹

• Max Flow Rate: Approx. 50 L/min @ 3,600 rpm

• Weight: Approx. 4.0 kg

NSH16M (НШ16М-3)

• Displacement: 16 cm³/rev

• Maximum Speed (n_max): 3,600 min⁻¹

• Max Flow Rate: Approx. 58 L/min @ 3,600 rpm

• Weight: Approx. 4.2 kg

NSH32M (НШ32М-3)

• Displacement: 32 cm³/rev

• Maximum Speed (n_max): 3,600 min⁻¹

• Max Flow Rate: Approx. 115 L/min @ 3,600 rpm

• Weight: Approx. 6.0 kg

NSH40M (НШ40М-3)

• Displacement: 40 cm³/rev

• Maximum Speed (n_max): 3,600 min⁻¹

• Max Flow Rate: Approx. 144 L/min @ 3,600 rpm

• Weight: Approx. 6.8 kg

NSH50M (НШ50М-3)

• Displacement: 50 cm³/rev

• Maximum Speed (n_max): 3,600 min⁻¹

• Max Flow Rate: Approx. 180 L/min @ 3,600 rpm

• Weight: Approx. 7.5 kg

Key Technical Advantages

1. Lightweight Aluminum Alloy Construction

The high-strength aluminum alloy housing delivers significant weight reduction compared to traditional cast iron equivalents. Weighing only approx. 7.5 kg for the NSH50M model, it provides excellent pressure containment at 160 bar continuous rating—ideal for three-axle truck tractors and weight-sensitive mobile hydraulic equipment.

2. Precision-Ground Gears for High Efficiency

Precision-machined gear pairs with optimized tooth profiles deliver high volumetric and mechanical efficiency. Volumetric efficiency reaches 81% or higher, maintaining stable flow output across the full pressure range.

3. Broad Speed Operating Range

Supports a wide speed range of 500 to 3,600 min⁻¹, maintaining stable flow characteristics whether operating at low-speed precision control or high-speed continuous duty—one pump for diverse application requirements.

4. High-Pressure Rating & Extreme Reliability

Rated continuous pressure of 160 bar, intermittent pressure of 210 bar, and peak pressure up to 250 bar. The aluminum alloy housing with precision sealing ensures long-term reliability under high-pressure, high-frequency, continuous-duty operations.

5. Complete Displacement Coverage & 100% Drop-In Interchangeability

Offers a complete displacement matrix from 10 to 50 cm³/rev (full series covers 6–100 cm³/rev). All models are manufactured to GSTU/GOST standards, ensuring 100% drop-in interchangeability with genuine NSH (НШ) series pumps—install directly with zero system modifications.

6. 100% Simulated Duty-Cycle Testing

Every pump is 100% tested on dedicated hydraulic test benches under simulated real-world operating conditions—validating pressure-flow characteristics and efficiency curves at rated pressure (160 bar), intermittent pressure (210 bar), peak pressure (250 bar), and full speed range—ensuring zero-defect, plug-and-play performance upon installation.

Application Areas

• Three-Axle Truck Tractors: Hydraulic lift systems, auxiliary hydraulic systems

• Agricultural Machinery: MTZ tractor hydraulic systems, combine harvester implement drives

• Construction Equipment: Loaders, graders auxiliary hydraulic systems

• Municipal & Road Machinery: Street sweepers, road construction equipment hydraulics

• Industrial Equipment: Forklifts, material handling equipment hydraulic systems

Expert Maintenance Tips

1. Fluid Cleanliness Control

Maintain system fluid cleanliness to ISO 4406 19/17/14 or better. Install a ≤10 μm absolute filtration filter upstream of the inlet port to prevent particle contamination from damaging precision gear pairs and bearings.

2. Inlet Line Requirements

Keep suction lines short and straight with adequate diameter—not less than the port size. Recommended suction line flow velocity: ≤1.5 m/s to prevent cavitation from excessive inlet resistance. Inlet pressure must be maintained between 0.8–2.0 bar (absolute) .

3. Coupling Alignment Precision

Ensure pump shaft-to-drive shaft coaxiality deviation ≤0.05 mm and angular deviation ≤0.5° during installation. Flexible couplings are strongly recommended. If the drive involves sprockets or V-belt pulleys, an independent outboard bearing MUST be installed to protect pump shaft bearings.

4. First-Start Priming Procedure

Before initial startup, prime the pump by bleeding air through the drain port or a loosened outlet fitting. Perform 2–3 jog starts with the outlet open (no load) until oil fills the pump cavity without air bubbles, then connect the load circuit for full operation.

5. Rotation Direction Confirmation

Always verify that the drive motor/engine rotation matches the pump before installation. NSH series supports both clockwise (CW) and counterclockwise (CCW) rotation configurations.

6. Viscosity & Temperature Monitoring

Recommended operating viscosity: 12–100 cSt. During cold starts when viscosity exceeds the recommended range, ensure adequate suction conditions or preheat the fluid to prevent cavitation damage. Recommended operating temperature range: +15°C to +80°C.