CBGJ1 CBGJ Series Hydraulic Gear Pump | High Pressure Single Gear Pump

Genlu Hydraulic proudly introduces our CBGJ1 and CBGJ Series heavy-duty engineering and mining-grade high-pressure cast iron external hydraulic gear pumps. Masterfully engineered for high-tonnage earthmoving applications, extreme dust environments, and continuous high-pressure cyclic shock profiles, this pump line thrives where standard aluminum alternatives fail. It is heavily utilized as the primary fluid aggregate within wheel loaders (notably 3-ton and 5-ton variations), mining dump trucks, industrial scrap balers, mobile crane outriggers, and heavy industrial hydraulic power stations. This series serves as a premium-engineered, highly robust, and exact drop-in replacement for global classic CBG/CBGJ series fixed displacement gear pumps. We specialize in cross-referencing and supplying the entire displacement span, prominently featuring the CBGJ1010, CBGJ1016, CBGJ1020, CBGJ1025, CBGJ1032, CBGJ1040, CBGJ1045, and CBGJ1050 single configurations alongside custom tandem/multi-stage pump configurations.

Serving as a heavy-duty “fluid power heart” in unforgiving industrial environments, Genlu’s CBGJ series gear pumps rigidly conform to universal geometric and installation standards. We guarantee 100% Drop-in Interchangeability across standard SAE 2-bolt/4-bolt pilot mounting flanges, SAE involute splined or parallel keyed drive shafts, and high-pressure standard SAE split-flange connection ports. Prior to shipment clearance, each cast iron gear pump assembly undergoes 100% full-rated pressure cyclic impulse simulation, floating thrust plate balance sealing audits, and thermal leakage logging, ensuring zero pressure drop and extreme structural endurance on high-vibration jobsites.

Technical Specifications 

• Product Line: CBGJ1 / CBGJ Series Heavy Duty High-Pressure Fixed Displacement External Hydraulic Gear Pump

• Displacement Model Matrix Covered:

  • CBGJ1010 (Geometric Displacement: 10.0 $cc/rev$)

  • CBGJ1016 (Geometric Displacement: 16.0 $cc/rev$)

  • CBGJ1020 (Geometric Displacement: 20.0 $cc/rev$)

  • CBGJ1025 (Geometric Displacement: 25.0 $cc/rev$)

  • CBGJ1032 (Geometric Displacement: 32.0 $cc/rev$)

  • CBGJ1040 (Geometric Displacement: 40.0 $cc/rev$)

  • CBGJ1045 (Geometric Displacement: 45.0 $cc/rev$)

  • CBGJ1050 (Geometric Displacement: 50.0 $cc/rev$)

• Continuous Rated Operating Pressure Boundary: 20.0 MPa (200 bar / 2900 psi)

• Maximum Intermittent Peak Pressure Threshold: 25.0 MPa (250 bar / 3625 psi)

• Permissible Operational Driven Shaft Velocities: Minimum 600 rpm; Maximum rated velocity 2400 rpm to 2500 rpm

• Drive Shaft Interface Configuration: Standard SAE involute splined shaft (Straight parallel keyed shaft available via custom build)

• Fluid Port Interface Connection: Standard SAE high-pressure split flange connection pattern

• Rotation Designation Configuration: Clockwise (Right-Handed: “R” code) / Counter-Clockwise (Left-Handed: “L” code) viewed from the drive shaft extension face

• Volumetric Efficiency Target (@ Rated Boundaries): $\ge 93\%$

Key Technical Advantages:

• High-Strength Ductile Cast Iron Housing Against Distortion: Unlike standard lightweight aluminum gear units, the entire main housing, front flange, and rear cover of the CBGJ1 series are forged from high-density ductile cast iron. This choice offers extreme rigid fatigue limits under continuous 25 MPa loads, removing any risk of housing dilation, bolt stretching, or micro-porosity fractures under aggressive physical impact.

• Axial Clearance Compensation via Floating Thrust Plates: Incorporates a floating “3-shaped” side thrust plate matrix fine-ground for precise running tracking. High-pressure oil is automatically directed beneath the sealing channel, shifting the thrust plates against the gear faces with micron-scale precision. This mechanism maintains volumetric efficiency above 93% even after heavy wear, preventing pressure drops when the oil heats up.

• Heavy-Duty DU Bearings and Anti-Trapping Relief Grooves: The gear journals are supported by heavy-duty DU composite sliding bushings that maintain a very low friction coefficient under extreme loads. Specialized asymmetric fluid unloading grooves machined into the side plates instantly vent trapping pressures during gear mesh, lowering noise and structural vibration.

• Precision Shaved Gears and Thru-Shaft Tandem Modularization: The internal steel drive and driven gears undergo precise CNC hobbing and shaving to ensure near-perfect involute contact. Furthermore, the rear housing supports modular thru-drive configurations, enabling engineers to tandem-couple multiple displacements (e.g., combining a CBGJ1040 with a CBGJ1016) on a single shaft to power independent fluid loops.

Application Areas:

• Heavy Construction & Earthmoving Machinery: Main work pumps, steering-assist aggregates, and fan-drive motors for large 5-ton wheel loaders and crawler excavators.

• Mining Operations & Rigid Haulage Equipment: High-tonnage hydraulic chassis lifting and tipping cylinders for articulated dump trucks and municipal waste equipment.

• Heavy Duty Material Handling & Port Crane Modules: Power supply units for mobile truck-mounted crane outriggers, port reach stackers, and industrial scrap compactors.

Expert Maintenance Tips:

• Rigidly Check Shaft Rotational Direction Match Prior to Power Coupling: When ordering or swapping a CBGJ1 series unit, always verify whether your machine circuit dictates Clockwise (R) or Counter-Clockwise (L) rotation. Because internal low-pressure intake and high-pressure discharge cavities are asymmetric, running the pump in reverse will direct high system pressure against the shaft lip seal, rupturing it and causing fluid loss within seconds.

• Mandatorily Pre-Fill the Internal Gear Cavity with Clean Oil Before First Start: Never run the pump dry. Due to the precision clearances inside these cast iron heavy-duty pumps, friction heat builds up instantly on dry components. Before mounting, pour clean hydraulic oil directly into the port and turn the drive shaft by hand 3-5 times to ensure a protective fluid film covers the gear faces and DU bushings before initial power-up.

• Secure Suction Flange O-Rings and Main Intake Lines Against Air Leaks: Heavy-duty gear configurations draw fluid at high velocities. If an intake hose clamp or an SAE split-flange O-ring develops minor cracks, air will be drawn continuously into the stream under localized vacuum. This triggers destructive cavitation, producing a distinct metallic rattling noise that can quickly pit the gear teeth and ruin the pump.