NSH-100-M Hydrosila Gear Pump 100cc 160bar 2400rpm

Product Overview

The NSH-100-M / NSH-50-M / NSH-40-M / NSH32 / NSH16 are external gear pumps from the Hydrosila MASTER M-3 series. This series covers displacements from 6 to 100 cm³/rev, with a continuous pressure rating of 160 bar and peak pressure of 250 bar.

The MASTER series gear pumps are the standard configuration for Eastern European hydraulic systems, widely used in MTZ tractors, asphalt pavers, wheel loaders, road construction machinery, and agricultural equipment. 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.

Every unit is manufactured to GSTU/GOST standards, ensuring 100% drop-in interchangeability with genuine Hydrosila NSH (НШ) series pumps without any system modifications. 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 Hydrosila original equipment. All Hydrosila brand names and model codes are referenced solely to indicate compatibility and interchangeability. This product is manufactured by an independent producer.

Technical Specifications 

MASTER M-3 Series General Specifications

• Brand Series: Hydrosila MASTER M-3 (NSH / НШ)

• Product Type: Fixed Displacement External Gear Pump

• Design Standard: GSTU / GOST

• 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: Right-hand (CW) / Left-hand (CCW) available

• Seals: NBR (Nitrile rubber), FKM (Viton) optional

• Multi-Pump Configuration: Tandem pumps supported (up to 2 sections)

Model-Specific Specifications

NSH-100-M (НШ100М-3)

• Displacement: 100 cm³/rev

• Maximum Speed (n_max): 2,400 min⁻¹

• Max Flow Rate: Approx. 240 L/min @ 2,400 rpm

• Weight: 11.5 kg

• Group: Group 4

NSH-50-M (НШ50М-3)

• Displacement: 50 cm³/rev

• Maximum Speed (n_max): 3,000 min⁻¹

• Max Flow Rate: Approx. 150 L/min @ 3,000 rpm

• Weight: Approx. 3.94 kg

• Group: Group 3

NSH-40-M (НШ40М-3)

• Displacement: 40 cm³/rev

• Maximum Speed (n_max): 3,000 min⁻¹

• Max Flow Rate: Approx. 120 L/min @ 3,000 rpm

• Weight: Approx. 3.52 kg

• Group: Group 3

NSH32 (НШ32М-3)

• Displacement: 32 cm³/rev

• Maximum Speed (n_max): 3,000 min⁻¹

• Max Flow Rate: Approx. 96 L/min @ 3,000 rpm

• Weight: Approx. 3.18 kg

• Group: Group 3

NSH16 (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. 1.66 kg

• Group: Group 2

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 11.5 kg for the NSH-100-M, it provides excellent pressure containment at 160 bar continuous and 250 bar peak ratings—ideal for tractors, asphalt pavers, and other weight-sensitive mobile hydraulic equipment.

2. GOST/GSTU Standard Interface – 100% Drop-In Interchangeability

Manufactured to strict GSTU and GOST mounting dimensions and interface standards. Delivers 100% drop-in interchangeability with genuine Hydrosila NSH (НШ) series pumps—install directly with zero system modifications on MTZ tractors and other equipment.

3. Precision-Ground Gears for High Efficiency

Precision-machined gear pairs with optimized tooth profiles deliver high volumetric efficiency and high mechanical efficiency. Maintains stable flow output across the full pressure range, ensuring reliability and efficiency of critical functions such as lifting, steering, and braking.

4. Broad Speed Operating Range

Supports a wide speed range of 500 to 3,600 min⁻¹ (smaller displacements) / 2,400 min⁻¹ (larger displacements). Maintains stable flow characteristics from low-speed precision control to high-speed continuous duty.

5. Complete Displacement Coverage & Multi-Pump Expandability

Offers a complete displacement matrix from 6 to 100 cm³/rev. Supports tandem pump configurations (up to 2 sections) for flexible system expansion.

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 continuous 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

• Tractors: MTZ, YuMZ, LTZ, DT-75, T-150, T-25 series hydraulic systems

• Asphalt Pavers: Hydraulic drive and control systems

• Construction Equipment: Wheel loaders, graders auxiliary hydraulic systems

• Agricultural Machinery: Combine harvesters, implement hitch control hydraulics

• Road Construction Machinery: Rollers, 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

NSH series supports both right-hand (clockwise) and left-hand (counterclockwise) rotation configurations. The “L” suffix indicates left-hand rotation; unmarked indicates right-hand. Always verify that the drive motor/engine rotation matches the pump before installation.

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: -20°C to +80°C.