CBN-F314L-TFHR Hydraulic Gear Pump 14 ml/r 20MPa Spline Shaft

Product Overview

The CBN-F314L-TFHR is a high-performance model from the CBN-F series of high-pressure gear pumps, specifically engineered for tractor, combine harvester, and agricultural machinery hydraulic systems. Featuring high-precision gear pairs, high-strength aluminum alloy extruded bodies, double floating bushings, and DU self-lubricating bearings, this pump delivers compact structure, high efficiency, low noise, and excellent contamination resistance.

The F-grade pressure rating delivers 20 MPa rated and 25 MPa maximum pressure capability, with a nominal displacement of 14 ml/r. The L suffix denotes left-hand (counter-clockwise) rotation. The TFHR suffix specifies rectangular spline shaft configuration, directly compatible with tractor PTO spline drive interfaces.

This pump serves as a direct interchangeability replacement for equivalent CBN-F314 series models, with fully compatible mounting dimensions and interfaces — making it the ideal choice for agricultural hydraulic system maintenance, upgrades, and replacements.

Technical Specifications 

• Model: CBN-F314L-TFHR

• Series: CBN-F Series High-Pressure Gear Pump

• Nominal Displacement: 14 ml/r

• Rated Pressure: 20 MPa

• Maximum Pressure: 25 MPa

• Rated Speed: 2000 r/min

• Maximum Speed: 3000 r/min

• Volumetric Efficiency: ≥95%

• Rotation Direction: Left-hand (L — Counter-clockwise)

• Shaft Type: Rectangular Spline (TFHR)

• Input Power: Approx. 12.5 kW (@ rated conditions)

• Body Material: High-strength aluminum alloy extruded profile

• Bearing Configuration: Double floating bushings + DU self-lubricating bearings

• Seal Material: NBR (standard)

• Mounting Type: Flange mounting

• Compatible Fluids: Mineral hydraulic oil and anti-wear hydraulic fluids

• Recommended Oil: ISO VG 46 anti-wear hydraulic oil

• Operating Oil Temperature Range: 10°C – 60°C

Key Technical Advantages

1. High Pressure Rating & Wide Speed Range

The F-grade pressure rating delivers 20 MPa rated and 25 MPa maximum pressure capability, suitable for medium-to-high pressure hydraulic systems. Speed range covers 500 to 3000 r/min, maintaining high volumetric efficiency even at low speeds.

2. Automatic Axial Clearance Compensation

Internally, the pump incorporates axial floating compensation and radial hydraulic balance technology, which automatically adjusts axial clearance based on operating pressure — ensuring consistently high volumetric efficiency of ≥95% throughout the pump’s service life.

3. DU Self-Lubricating Bearings & High-Strength Housing

DU self-lubricating bearings combined with double floating bushings significantly enhance bearing load capacity and impact resistance. The high-strength aluminum alloy extruded body delivers structural integrity while achieving lightweight design for easy installation and maintenance.

4. Rectangular Spline Shaft (TFHR) — Optimized for Tractor PTO Drive

The TFHR suffix specifies rectangular spline shaft configuration, directly matching standard tractor PTO spline interfaces. Compared to keyed connections, spline drives offer higher load capacity and superior alignment, effectively preventing drive failure caused by keyway wear.

5. Excellent Contamination Resistance & Low-Noise Operation

High-precision gear pairs and optimized flow path design provide superior contamination resistance. The compact structural design and precision manufacturing effectively reduce operating noise — particularly beneficial for agricultural machinery and construction equipment operating in noise-sensitive environments.

Application Areas

• Tractor Hydraulic Systems — Lift systems, power steering, hitch control

• Combine Harvesters — Header lifting, grain auger drives

• Agricultural Machinery — Seeders, fertilizer spreaders, sprayers

• Construction Equipment — Loaders, excavators, forklifts

• Mining Machinery — Underground equipment hydraulic power units

• Material Handling — Lift platforms, conveying equipment

• Industrial Equipment — Machine tool hydraulics, light industrial machinery

Compatible with major tractor brands including Dongfang Hong, Lovol, and John Deere.

Expert Maintenance Tips

1. Installation Requirements

• Shaft concentricity with the drive unit must be controlled within 0.1 mm

• For TFHR spline shaft engagement with tractor PTO spline coupling, ensure smooth spline meshing — never force-fit

• Flange bolts must be evenly tightened in a diagonal pattern to prevent housing distortion or seal failure

• Confirm rotation direction is left-hand (counter-clockwise) 

2. Piping & Filtration

• Inlet pipe diameter must not be smaller than the pump inlet port; piping should be as short as possible with minimal bends

• A filter must be installed on the inlet line with filtration rating ≥25 μm

• Thoroughly flush all piping with high-pressure oil before installation to prevent hard particle contamination

3. Pre-Start Checks

• Prime the pump by filling the housing with hydraulic oil before initial start-up

• Jog the motor to verify rotation direction is left-hand, matching pump marking; reverse rotation is strictly prohibited

• Recommended fluid: ISO VG 46 anti-wear hydraulic oil; use ISO VG 32 when ambient temperature is below 0°C

4. Operation & Maintenance

• Normal operating oil temperature should be maintained between 10°C and 60°C

• Replace hydraulic oil and filter after the first 500 hours of operation, then every 2,000 hours thereafter

• Periodically inspect pump housing connections for leaks; if abnormal noise or pressure instability occurs, shut down immediately for inspection

• For extended shutdown periods, drain the hydraulic system and store in a dry, well-ventilated environment