NSH-100A-3L Hydraulic Gear Pump | 100cc/rev 160 bar for MTZ Tractor

Product Overview

The NSH-100A-3L is a high-displacement hydraulic gear pump from the NSH series, featuring a 100 cc/rev displacement. It is specifically engineered for the hydraulic systems of MTZ series tractors, K-700/K-701 series heavy-duty tractors, and a wide range of construction and earth-moving machinery.

As an upgraded “ANTEY” series model, the NSH-100A-3L represents a modern evolution of the classic NSH gear pump design. The housing is manufactured from high-strength metal alloys, with slide bearings integrated into a monolithic block design that effectively distributes hydraulic loads and minimizes bearing wear—ensuring reliable operation even under extreme conditions.

Designed as a direct drop-in replacement for the aftermarket, the NSH-100A-3L fully complies with GOST mounting standards and offers 100% interchangeability with original NSH pumps and ANTEY-series pumps. Every unit undergoes 100% workload simulation testing prior to shipment, rigorously validating pressure retention and internal leakage performance to meet or exceed OEM specifications.

Model Code Breakdown: NSH-100A-3L

• NSH — Series designation

• 100 — Displacement of 100 cm³/rev

• A — Reinforced “A” version design

• 3 — Pressure version group (rated 16 MPa / 160 bar)

• L — Left-hand rotation (counter-clockwise)

Technical Specifications 

• Model: NSH-100A-3L (НШ-100А-3Л)

• Displacement: 100 cm³/rev

• Rated Pressure (Continuous): 160 bar (16 MPa)

• Maximum Pressure (Intermittent): 210 bar (21 MPa)

• Peak Pressure (Transient): 250 bar (25 MPa)

• Rated Flow: 141 L/min

• Rated Power Consumption: 66.4 kW

• Minimum Speed: 500 min⁻¹

• Maximum Speed: 2400 min⁻¹

• Rotation Direction: Left-hand (counter-clockwise)

• Weight: 16.5 kg

• Housing Material: High-strength metal alloy

• Bearing Type: Slide bearings, monolithic block design

Key Technical Advantages

1. Reinforced “A” Version Construction
The NSH-100A-3L belongs to the reinforced “A” version of the NSH-100 series, specifically optimized for heavy-duty applications. The housing is manufactured from high-strength materials, with slide bearings housed in a monolithic block that effectively withstands high hydraulic loads and extends service life.

2. Superior Pressure Capability
With a rated pressure of 160 bar and peak pressure up to 250 bar, this pump easily handles high-pressure shock loads encountered during lifting, dozing, and other heavy equipment operations. The three-stage pressure version design ensures stable output performance across varying load conditions.

3. Low Noise Operation
Noise levels are approximately 72–76 dB(A) at 150 bar and 1500 rpm—significantly better than competing products, providing a more comfortable working environment for operators.

4. Low Internal Leakage
Internal leakage is below 30 mL/min at rated pressure on new builds, ensuring high volumetric efficiency, reduced energy loss, and lower system operating temperatures.

5. 100% Factory Tested
Every pump undergoes 100% workload simulation testing prior to shipment, covering pressure retention verification, internal leakage detection, and flow validation—ensuring every unit meets design performance standards.

6. 100% Direct Interchangeability
Fully compliant with GOST mounting standards, with flange dimensions and spline shaft specifications identical to OEM NSH pumps and ANTEY-series pumps—direct drop-in replacement with zero modifications required.

Application Areas

The NSH-100A-3L is widely used in the hydraulic systems of the following equipment:

• Crawler Tractors: T-130, T-150, T-170G, HT3-17121, Belarus series

• Wheel Tractors: K-700A, K-701, K-702, K-703 series

• Bulldozers: T-901, T-1101, T-2501, T-3501, DET-250

• Pipe Layers: TG-121, TR-12, TR-20, T-122/222/301/302/503

• Loaders: PK-1202 wheel loaders

• Dump Trucks: BelAZ-754, MoAZ-7405

• Excavators: EO-2626, EO-2627, EO-2628, EO-2629A

• Road Machinery: DZ-13, DZ-115 motor scrapers

Expert Maintenance Tips

1. Rotation Direction Confirmation
The “L” suffix in the model designation indicates left-hand rotation (counter-clockwise). Before installation, always verify that the PTO rotation direction of the host machine matches the pump’s rotation direction—incorrect rotation will result in pump failure to supply oil and may cause severe damage within a short period.

2. Installation Precautions

• Thoroughly clean the mounting flange and spline shaft before installation to ensure no debris remains

• Use recommended torque values for mounting bolts—avoid over-tightening which may cause housing distortion

• Ensure correct inlet and outlet port connections; the inlet line must have no restrictions or sharp bends

3. First Start-Up and Bleeding

• Before first start-up, fill the pump with hydraulic oil through the inlet port to prevent dry start-up

• After start-up, run at low speed with no load for 2–3 minutes to ensure complete air evacuation from the system

• Check for abnormal noise or leakage

4. Fluid and Filtration

• Use high-quality mineral hydraulic oil compliant with GOST standards

• Maintain system oil cleanliness to ISO 4406 18/15 or better

• Regularly replace return line filters to prevent contaminants from entering the pump

5. Periodic Maintenance

• Check mounting bolt torque every 1,000 operating hours

• Regularly monitor system operating pressure to ensure it does not exceed rated values

• If flow output decreases or noise levels increase abnormally, inspect and replace worn components promptly