CBN Gear Pump | CBN-E310 CBN-E314 CBN-F310 Hydraulic Pump

Genlu Hydraulic excels as a world-class engineered component manufacturer, fluid technology supplier, and strategic global partner for high-efficiency medium-displacement hydraulic gear pumps optimized for demanding agricultural, material handling, and industrial applications. The CBN Series High-Pressure External Hydraulic Gear Pump (comprising the CBN-E300 rated baseline and the CBN-F300 high-pressure variant platforms) is custom-manufactured as a premium, lightweight, and 100% drop-in interchangeable alternative to the ubiquitous external micro-heavy gear pumps integrated worldwide. We manage complete inventory readiness across all standard single and multi-stage configurations, including CBN-E304, CBN-E306, CBN-E310, CBN-E314, CBN-E316, CBN-E320, CBN-E325, and high-pressure groupings CBN-F304, CBN-F306, CBN-F310, CBN-F312, CBN-F314, and CBN-F316.

Operating as the primary power muscle for tractor three-point hitch lift links, industrial forklift steering/mast lifting systems, mini-excavator auxiliary manifolds, and recycling baler power stations, a small external gear pump must deliver sustained volumetric performance under fluctuating high temperatures, harsh cyclic shocks, and extreme dust contamination. Genlu’s CBN series gear pumps conform precisely to worldwide fluid power standards. We guarantee flawless plug-and-play mechanical interchangeability across generic SAE or metric 2-bolt diamond mounting flanges, standard input drive shafts (involute splined, keyed, or flat tang shaft variations), port connection interfaces (split diamond flange or generic threaded BSPP/Metric openings), and inner balance plates. Prior to shipping clearance, every single pump assembly undergoes 100% Full-Simulation Condition Testing to validate structural pressure holding, absolute zero dynamic outer leakage, and strict low-noise compliance under full continuous load.

Technical Specifications

• Product Line: CBN Series External High-Pressure Hydraulic Gear Pump (E-Pressure Class and F-Pressure Class Series)

• Core Covered Specific Configurations: CBN-E304, CBN-E306, CBN-E310, CBN-E314, CBN-E316, CBN-E320, CBN-E325, CBN-F304, CBN-F306, CBN-F310, CBN-F312, CBN-F314, CBN-F316

• Geometric Displacement Metric Groupings:

  • 304 Code: 4.0 $cc/rev$

  • 306 Code: 6.0 $cc/rev$

  • 310 Code: 10.0 $cc/rev$

  • 312 Code: 12.0 $cc/rev$

  • 314 Code: 14.0 $cc/rev$

  • 316 Code: 16.0 $cc/rev$

  • 320 Code: 20.0 $cc/rev$

  • 325 Code: 25.0 $cc/rev$

• Continuous Rated Operating Pressures:

  • CBN-E Configurations: Rated at 160 bar (16.0 MPa / 2320 psi) continuous; intermittent peaks up to 200 bar

  • CBN-F Configurations: Rated at 200 bar (20.0 MPa / 2900 psi) continuous; intermittent peaks up to 250 bar

• Permissible Driving Rotational Velocity Envelope: From 600 rpm (Minimum threshold to establish fluid suction) up to 3000 rpm (Maximum rated speed limits)

• Drive Shaft Profile Options: Involute splined shaft (standard 4-tooth or 6-tooth configurations), cylindrical straight keyed shaft, or direct coupling flat tang shaft profiles

• Fluid Connection Ports: Diamond flange bolt split-block interfaces or generic internal pipeline threads (G, BSPP, PT, NPT, or Metric threads)

• Shaft Rotational Orientation: Right-Hand Configuration (Clockwise rotation when looking directly onto the shaft face); Left-Hand Configuration (Counter-Clockwise variation available)

• Main Housing Metal Processing: High-tensile, monolithic extruded impact-molded aluminum alloy housing

• Total Pump Dry Assembly Mass: Approximately 2.8 kg to 4.2 kg (Ultra-compact, lightweight structure)

Key Technical Advantages:

• Monolithic Extruded High-Tensile Aluminum Shell to Combat Structural Swelling: The central pump barrel is extruded from premium-grade pure aluminum alloy. This structural metallurgical process eliminates the hidden subsurface air porosity common in budget sand-cast alternatives, delivering fatigue strength that prevents housing body “swelling” distortion under continuous 200+ bar pressure pulses.

• Floating Bushing Design for Automatic Axial Clearance Compensation: The internal gear assembly is held by floating DU bearing blocks. High-pressure oil is routed through precise multi-ring backing seals to the rear faces of these bushings, creating a hydrostatic bias force that gently presses them flat against the gear faces. This self-compensating mechanism minimizes end-play clearances over extended service cycles, keeping volumetric efficiency above 95%.

• Precision Rolling-Shaved Gear Set Paired with Self-Lubricating Composite Bearings: The primary drive shafts are forged from high-tensile alloy steel and finished with a multi-axis shaving and rolling micro-polish to lower gear mesh friction. The internal support journals use imported self-lubricating DU composite sleeves (backed by steel with a sintered bronze inner layer and a low-friction PTFE-lead overlay), ensuring wear resistance during intermittent dry-starts.

• Modular Multi-Stage Tandem and Triple Cascading Capacity: The front frame and rear cover assemblies feature standardized interconnecting flanges. By using modular internal joining splines, multiple CBN units can be linked together into a single tandem or triple gear pump (e.g., CBN-E310 + E304). This configuration reduces the number of primary electric motors needed and simplifies overall fluid plumbing constraints.

Application Areas:

• Modern Agricultural Machinery & Utility Tractors: Powering three-point rear linkage lift actuators on medium-to-heavy wheel tractors and main header steering circuits on combine harvesters.

• Material Handling Vehicles & Warehouse Logistics: Primary hydraulic power units for steering and mast lifting gear loops on 1.5-ton to 3.5-ton internal combustion and electric forklifts.

• Compact Industrial Power Packs: Compact closed fluid stations driving scrap paper recycling balers, commercial truck tailgates, and municipal waste compaction systems.

Expert Maintenance Tips:

• Enforce Rigid Drive Alignment Constraints to Prevent Shaft Failure: Aluminum-bodied gear pumps have less casing rigidity than cast-iron alternatives. When coupling a CBN pump to an electric motor or diesel engine flywheel, the maximum shaft alignment runout error must remain within 0.05 mm. Angular or parallel misalignment creates high cyclic shear forces on the drive shaft, which can wear out the shaft seal and cause shaft fatigue failure within hours.

• Verify Large Suction Line Sizing and Guard Against Intake Hose Collapse: External gear pumps generate strong vacuum pull, especially larger sizes like CBN-E320 and CBN-E325. The internal diameter of the suction line must be at least 1.5 times larger than the discharge line, and you must use an steel-wire reinforced high-pressure suction hose. Using an unreinforced soft hose can cause it to collapse under vacuum during cold-weather startups with high oil viscosity, starving the pump and causing high-temperature metal seizure within 30 seconds.

• Execute Pre-Commissioning Air Venting and Audit Main Relief Valve Set-Points: CBN gear pumps do not have external case drain ports and rely on internal oil routing for cooling. After installing a new pump, loosen the main discharge fluid line and rotate the drive shaft manually several times to purge trapped air pockets. Before starting the system under power, verify that the primary circuit pressure relief valve is calibrated below the pump’s peak rating (never exceed 20 MPa for E-series or 25 MPa for F-series) to prevent overpressure housing failure if an actuator jams.