Product Overview
The NSH32M-3, NSH-6, NSH-14, NSH-16, NSH-32, NSH-40, NSH-50, NSH-70A, and NSH-100A series hydraulic gear pumps are high-performance external gear pumps originating from the Soviet/Russian NSh (НШ) gear pump technology platform. These pumps are widely compatible with MTZ (Minsk Tractor Works) series tractors and their variants, serving as the core power components for hydraulic systems in agricultural machinery, construction equipment, and industrial vehicles.
This series features external gear pump construction, manufactured in accordance with GOST 19027-89 standards. M series models (NSH6M–100M) feature high-strength aluminum alloy housings with maximum continuous pressure of 160 bar. A series models (NSH70A–100A) are high-displacement versions for higher flow rate applications.
Key Interchangeability Advantage: Our NSH series gear pumps are manufactured to strict Russian NSh original design specifications, ensuring 100% direct interchangeability with original units. All mounting interfaces, flange dimensions, spline shaft specifications, and port positions are identical to the original product—directly replacing original pumps on MTZ-80/82, DT-75, T-150, K-700, DON series combines, and numerous other equipment models with no modifications required. Every pump undergoes 100% factory performance testing under simulated operating conditions, guaranteeing plug-and-play reliability with zero performance deviation.
Model Code Breakdown (based on NSh series designation rules):
NSH (НШ) = Series: External Gear Pump (Насос Шестеренный)
6 / 14 / 16 / 32 / 40 / 50 / 70A / 100A = Nominal displacement (cm³/rev)
M = Aluminum housing standard type (160 bar continuous)
-3 = Spline specification code
L / R / П = Rotation direction: Left-hand / Right-hand
Technical Specifications
NSH Series – General Specifications
Product Series: NSH (NSh) Series External Gear Pump
Origin Standard: Russian GOST 19027-89
Pump Type: External Gear Pump
Direction of Rotation: Right-hand (R) or Left-hand (L) (fixed, model-dependent)
Housing Material: High-strength aluminum alloy (M series) / Aluminum alloy (A series)
Gear Material: Case-hardened special alloy steel
Bearing Type: Metal-fluoroplastic composite plain bearings
Seals: NBR (Nitrile Butadiene Rubber)
Operating Temperature Range: -30°C to +120°C
Recommended Fluid: Mineral hydraulic oil
Mounting Position: Optional
NSH-6 / NSH6M
Displacement: 6.0 cm³/rev
Maximum Continuous Pressure (P₁): 160 bar
Maximum Intermittent Pressure (P₂): 210 bar
Maximum Peak Pressure (P₃): 250 bar
Maximum Speed: 4200 rpm
Minimum Speed: 500 rpm
NSH-14 / NSH14M
Displacement: 14.0 cm³/rev
Maximum Continuous Pressure (P₁): 160 bar
Maximum Intermittent Pressure (P₂): 210 bar
Maximum Peak Pressure (P₃): 250 bar
Maximum Speed: 3600 rpm
Minimum Speed: 500 rpm
NSH-16 / NSH16M
Displacement: 16.0 cm³/rev
Maximum Continuous Pressure (P₁): 160 bar
Maximum Intermittent Pressure (P₂): 210 bar
Maximum Peak Pressure (P₃): 250 bar
Maximum Speed: 3600 rpm
Minimum Speed: 500 rpm
NSH-32 / NSH32M-3
Displacement: 32.0 cm³/rev
Maximum Continuous Pressure (P₁): 160 bar (190 bar on some models)
Maximum Intermittent Pressure (P₂): 210 bar
Maximum Peak Pressure (P₃): 250 bar
Maximum Speed: 2400 – 3000 rpm
Minimum Speed: 500 rpm
Rated Flow: 36 – 45.1 L/min
Rated Power: 13.94 – 26.6 kW
Weight: 3.5 – 6.2 kg
NSH-40 / NSH40M
Displacement: 40.0 cm³/rev
Maximum Continuous Pressure (P₁): 160 bar
Maximum Intermittent Pressure (P₂): 210 bar
Maximum Peak Pressure (P₃): 250 bar
Maximum Speed: 3600 rpm
Minimum Speed: 500 rpm
NSH-50 / NSH50M
Displacement: 50.0 cm³/rev
Maximum Continuous Pressure (P₁): 160 bar
Maximum Intermittent Pressure (P₂): 210 bar
Maximum Peak Pressure (P₃): 250 bar
Maximum Speed: 3600 rpm
Minimum Speed: 500 rpm
NSH-70A
Series: NSH A Series High-Displacement Gear Pump
Displacement: 70.0 cm³/rev
Maximum Operating Pressure: 160 bar
Compatible Models: MTZ series tractors and large agricultural machinery
NSH-100 / NSH100A / NSH100A-3L
Series: NSH A Series High-Displacement Gear Pump
Displacement: 100.0 cm³/rev
Maximum Continuous Pressure: 160 bar
Maximum Operating Pressure: 100 bar
Maximum Speed: 3600 rpm
Minimum Speed: 500 rpm
Compatible Models: MTZ series tractors, combine harvesters, bulldozers
Key Technical Advantages
1. High-Strength Aluminum Housing for Lightweight High Power Density
M series models feature high-strength aluminum alloy housings, delivering substantial weight reduction while maintaining structural integrity. The lightweight design simplifies installation and reduces the load on host machinery—particularly critical for weight-sensitive mobile equipment applications.
2. Metal-Fluoroplastic Composite Plain Bearings for Long Service Life and High Reliability
Employing metal-fluoroplastic composite plain bearings effectively reduces friction and wear, extending product service life. Combined with case-hardened special alloy steel gears, wear resistance and fatigue resistance are significantly enhanced.
3. Precision Design for High Volumetric Efficiency and Low Noise Operation
The NSH Series features precise and detailed design, delivering high volumetric efficiency and high mechanical efficiency. Optimized gear design and compact precision construction effectively reduce operating noise and pulsation. The NSH32M-3 achieves efficiency of 81%.
4. Wide Displacement Coverage for Flexible Equipment Compatibility
The NSH Series offers displacements from 6 to 100 cm³/rev across multiple options, covering everything from light tractors to heavy construction equipment. Available in both right-hand and left-hand rotation directions. The broad displacement and rotation options ensure precise matching to installation and performance requirements across diverse equipment.
5. Extensive Compatibility Coverage
The NSH Series pump is the core power component of MTZ tractor hydraulic systems, with performance directly affecting the reliability and efficiency of critical functions such as lifting, steering, and braking. These pumps are compatible with MTZ 500/800/900/1220/1221/2022 series tractors, HTZ-150, YuMZ-6 series tractors, Rostselmash SK5M/Niva/DON 1500 combines, KAMAZ, BELAZ, and numerous other vehicle models and variants. MASTER series pumps are fully interchangeable with У, УК, Г, Д, and Ж series pumps.
Application Areas
MTZ Series Tractors: MTZ-80, MTZ-82, MTZ-1221 and other Belarus tractor hydraulic systems
Combine Harvesters: DON-680, DON-1200, DON-1500, Rostselmash SK5M, Niva series combines
Crawler Tractors: DT-75 series crawler tractors
Heavy Construction Vehicles: K-700 Kirovets tractors, T-150 tractors
Mining Vehicles: BELAZ mining dump trucks
Trucks & Commercial Vehicles: KAMAZ series trucks
Loaders & Construction Equipment: Wheel loaders, bulldozers, graders
Agricultural Machinery: Various agricultural tractors, sprayers, seeders hydraulic systems
Expert Maintenance Tips
1. Model Confirmation and Selection
Complete NSH series model should include: Series + Displacement + Material Code (M/A) + Rotation (R/L) + Spline Specification (-3/-4) , e.g., NSH32M-3.
M series features aluminum housing with continuous pressure 160 bar; A series features high-displacement versions (70/100 cm³/rev).
NSH-6 maximum speed is 4200 rpm; all other models have maximum speed 3600 rpm. Verify original drive speed during selection.
MTZ-80/82 tractors use right-hand rotation pumps (clockwise when viewed from shaft end).
2. Rotation Direction Confirmation
3. First Start-Up & Oil Priming
Prime the pump housing with clean hydraulic oil before first start-up; ensure suction line is fully filled—never run dry.
Recommended fluid: GOST-spec mineral hydraulic oil.
Maintain operating temperature within -30°C to +120°C.
Minimum speed: 500 rpm.
4. Filtration & Fluid Cleanliness
5. Operating Monitoring
Continuous operating pressure must not exceed 160 bar (M series).
If abnormal noise or pressure fluctuation occurs, first check suction lines for leakage or blockage.
Regularly check torque on pump and piping connection bolts to prevent loosening from vibration.
