CBN-F314 CBN-F320 CBN-F325 Hydraulic Gear Pump | High Pressure Tractor Oil Pump

The CBN-F300 Series (including CBN-F314, F316, F318, F320, and F325) high-pressure hydraulic gear pumps by Chengyuan Hydraulic are robust, heavy-duty power units designed for demanding mobile applications. Widely utilized as the primary hydraulic source for agricultural machinery (tractors, harvesters), forklifts, and industrial power packs, this series is renowned for its high volumetric efficiency and exceptional shock resistance. Covering specific variants like CBN-F325-AFPR (Right-hand) and CBN-F304-AFPL (Left-hand), we ensure precise directional matching. Every CBN pump undergoes 100% simulated operational load testing to guarantee that pressure pulsation and flow stability align perfectly with OEM standards, delivering proven 100% original-place interchangeability.

Technical Specifications 

• Product Series: CBN-F300 Reinforced High-Pressure Series

• Supported Models: CBN-F304, F310, F314, F316, F318, F320, F325

• Displacement Range:

  • CBN-F304: 4.0 $cm^3/rev$

  • CBN-F314: 14.0 $cm^3/rev$

  • CBN-F316: 16.0 $cm^3/rev$

  • CBN-F320: 20.0 $cm^3/rev$

  • CBN-F325: 25.0 $cm^3/rev$

• Rated Operating Pressure: 20 MPa (200 bar)

• Peak Operating Pressure: 25 MPa (250 bar)

• Rated Speed: 2000 rpm

• Maximum Speed: 3000 rpm

• Shaft End Types: A-type (Spline), P-type (Plain Key), H-type (Rectangular Spline)

• Mounting Flange: F-type (Rectangular 4-bolt flange)

• Port Options: Diamond flange or threaded ports (per specific model code)

• Rotation Options: R (Right/Clockwise) or L (Left/Counter-clockwise)

Key Technical Advantages:

• Axial Clearance Automatic Compensation: Featuring floating bushing technology that utilizes hydraulic pressure feedback to keep side plates tight against gear faces. This design maintains volumetric efficiency above 93%, even under continuous 25 MPa loads.

• High-Strength Extruded Aluminum Alloy Body: The pump housing is manufactured using specialized high-strength aluminum extrusion. Compared to standard cast bodies, it provides superior fatigue resistance and manages hydraulic pulses without the risk of housing rupture.

• Heavy-Duty DU Bushings: Equipped with high-performance DU sliding bearings. The self-lubricating layer protects the journals against scoring even during temporary lubrication starvation or oil temperature fluctuations, extending service life in harsh environments.

• Double-Lip High-Pressure Shaft Seals: Utilizing premium imported shaft seals designed for high-temperature and high-pressure resistance. It prevents oil leakage at the shaft end even under significant case backpressure, protecting the engine or gearbox.

Application Areas:

• Agricultural Machinery: Main hydraulic lift and power steering for various tractors (e.g., Foton, YTO, Jinma).

• Material Handling: Lift and tilt circuits for 1-3 ton forklift trucks.

• Small Construction Equipment: Auxiliary hydraulic power for mini-loaders and graders.

Expert Maintenance Tips:

• Verify Rotation Before Installation: Always check the “R” or “L” suffix against your old pump. Reverse rotation will blow the internal shaft seal instantly and contaminate the entire system with metal debris.

• Never Start Dry: Upon initial installation, you must pre-fill the pump with clean hydraulic oil via the inlet port and rotate the shaft manually. Running the pump dry for even a few seconds can score the floating side plates, causing a permanent loss in pressure.

• Stringent Filtration Requirements: It is highly recommended to maintain system cleanliness using $25 \mu m$ suction filters and $10 \mu m$ return filters to prevent abrasive particulates from damaging the precision gear mesh.