CBGJ Series High Pressure Gear Pump | CBGJ3125 CBGJ2100 Tandem Pump Replacement for Loader & Excavator

Genlu Hydraulic proudly introduces our CBGJ Series (including CBGJ1, CBGJ2, and CBGJ3 single configurations, as well as multiple tandem variations) heavy-duty, high-pressure cast iron gear pumps. This series is fully engineered to benchmark the rigorous technical profiles required by large-flow, intense-load hydraulic systems in modern earthmoving and construction equipment. Serving as the robust hydraulic power core for 5-ton to 8-ton wheel loaders, crawler excavators, and truck cranes, these pumps utilize a high-tensile three-piece cast iron chassis and fully floating thrust bushings for adaptive clearance control. Genlu guarantees 100% Drop-in Interchangeability across spline drive shafts, heavy-duty mounting flanges, and oil port bolt circles compared to OEM equivalents. Every single or tandem CBGJ pump undergoes strict 100% simulation testing under dynamic peak loads to certify long-term volumetric capability and anti-shock reliability in the field.

Technical Specifications 

• Product Series: CBGJ / CBGJ1 / CBGJ2 / CBGJ3 Series High-Pressure Cast Iron Gear Pumps

• Key Model Identifier: CBGJ3125/1010A-XF-l, CBGJ2100/1016-XF, CBGJ2100/1010-XF (Tandem Formats)

• Displacement Layout:

  • Front Main Pump: 100 cc/rev (CBGJ2100 family) / 125 cc/rev (CBGJ3125 family)

  • Rear Auxiliary Pump: 10 cc/rev (1010 series) / 16 cc/rev (1016 series)

• Nominal Operating Pressure: 25 MPa (250 bar)

• Peak Transverse Pressure: 27.5 MPa (275 bar)

• Permissible Operational Speeds: 500 rpm to 2500 rpm (Rated velocity at 2000 rpm)

• Pump Configuration Type: Inline Tandem Double Stage Setup (Dividing or combining main work and steering circuits)

• Shaft Spline & Flange Formats: Code XF / Involute splined shaft profile with rectangular/diamond cast iron mounting flange

• Direction of Rotation: Clockwise (Right-hand, standard) / Counter-clockwise (Left-hand, designated by suffix “-l”)

Key Technical Advantages:

• Heavy Duty Three-Piece All-Cast Iron Casing: Unlike standard aluminum alloy pumps, the CBGJ body is poured from premium nodular or high-density gray cast iron. This delivers unmatched volumetric stability under cyclic 25 MPa pressure spikes and severe mechanical chassis vibrations without any fracture vulnerabilities.

• Hydraulic Swell Axial Gap Compensation: The assembly integrates precision floating DU-lined thrust bushings backed by pressurized balance tracks. This dynamic architecture seals end-face boundaries adaptively as circuit resistance rises, holding volumetric efficiency consistently above 93%.

• High-Load Resilient Journal Roller Bearings: The hardened gear shafts run on specialized high-capacity heavy roller/journal bearings. This configuration enables the gears to withstand residual axial/radial alignment stresses originating from the engine PTO, reducing gear-tooth case scoring.

• Modular Extensible Through-Shaft Tandem Design: Utilizing robust internal splined coupling kits, configurations like the CBGJ3125/1010A connect multiple pumps into a single footprint driven by one power takeoff. This optimizes engine bay space envelopes and slashes complex hydraulic circuit hard-line plumbing.

Application Areas:

• Heavy Earthmoving & Mobile Vehicles: Primary working/steering pumps for 5t/6t/8t heavy wheel loaders, heavy crawler dozers, and motor graders.

• Lifting & Road Compaction Fleet: Main winching circuits for hydraulic truck cranes, asphalt mixing plants, and double-drum vibratory rollers.

• Specialized Logistics & Mining Equipment: High-pressure dump truck bed hoists and high-volume multi-way spool valve supply nodes for municipal waste compactors.

Expert Maintenance Tips:

• Verify Rotational Alignment (Critical Protocol): CBGJ pumps are direction-specific, indicated strictly by model codes (e.g., “-l” for counter-clockwise, absent for clockwise). Always map the engine PTO output orientation before bolting. Running a pump backwards will instantly rupture the low-pressure shaft oil seal and score the internal bushings.

• Deploy Rigid Steel-Reinforced Suction Lines: Tandem assemblies (like the CBGJ3125 scale) draw massive instantaneous fluid columns. The inlet line must feature a high-vacuum, steel-wire braided suction hose. Any wall collapse or internal layer delamination will induce destructive cavitation, generating deep screaming notes and leading to immediate tooth erosion.

• Enforce Strict Cleanliness and Thermal Audits: Mobile hydraulics encounter highly hostile dust factors; fluid filtration must maintain a rating of $\le 25\mu m$. Additionally, keep continuous operating thermal metrics under $80^\circ\text{C}$. Overheated oil destroys fluid film viscosity, accelerating boundary friction across the thrust bearings.