CBG Series High Pressure Gear Pump | CBG-2032 CBG-2040 CBG-2050 CBG-2063 | Hydraulic Pump

The CBG Series high-pressure gear pumps by Chengyuan Hydraulic are axial-compensated units specifically engineered for the rigorous demands of heavy-duty construction machinery. This series is fully compatible with industry-standard models, ranging from CBG-2032-BF to CBG-2063-BF. Featuring high-strength housings paired with precision-ground gears, these pumps utilize floating side-plate technology for automatic pressure compensation. Every unit undergoes 100% simulated condition testing to guarantee peak volumetric and mechanical efficiency at rated pressures. Providing 100% original-place interchangeability, the CBG series is the premier choice for maintenance and upgrades in bulldozers, loaders, and road rollers.

Technical Specifications :

• Model Range: CBG-2032, CBG-2040, CBG-2050, CBG-2063 (BF suffix: Flange mount/Square shaft)

• Displacements: $32\text{, } 40\text{, } 50\text{, } 63\text{ cm}^3\text{/rev}$

• Rated Pressure: $20\text{ MPa (200 bar / 2900 psi)}$

• Peak Pressure: $25\text{ MPa (250 bar / 3625 psi)}$

• Speed Range: $600\text{–}2500\text{ rpm}$

• Volumetric Efficiency: $\ge 93\%$ at rated conditions

• Mounting Type: Standard 4-bolt diamond flange or rectangular flange

• Shaft Options: Straight key, spline, or rectangular shaft (per specific code)

Key Technical Advantages

• Pressure-Balanced Floating Side Plates: These plates utilize internal hydraulic pressure to maintain minimal end-face clearance against the gears. This automatically compensates for thermal expansion and ensures superior volumetric efficiency even at $20\text{ MPa}$.

• Heavy-Duty DU Bearings: Integrated composite DU bearings offer exceptional impact resistance and self-lubricating properties. They are designed to withstand significant axial and radial loads caused by frequent load shifts in heavy machinery.

• High-Strength Three-Piece Housing: The robust body material, combined with precision-machined 8-shaped cavities, suppresses fluid pulsation and structural vibration, significantly extending the pump’s operational fatigue life.

• Advanced Sealing System: Equipped with premium high-pressure skeleton oil seals and NBR/FKM combinations, the pump ensures zero leakage even in extreme environments such as dusty mines or high-temperature sites.

Application Areas:

• Road Machinery: Vibration or drive circuits for road rollers, graders, and pavers.

• Construction Machinery: Work-tool pumps for wheel loaders and hydraulic control systems for bulldozers.

• Lifting Equipment: Winch and swing mechanisms for truck-mounted cranes.

Expert Maintenance Tips:

• Rotation Verification: CBG pumps are typically available in Clockwise (R) or Counter-clockwise (L) rotations. Always verify the drive source direction before installation; reversing rotation will blow the shaft seal within seconds.

• Inlet Vacuum Control: Ensure the suction line is sufficiently sized and the filter is clean. Large displacement pumps like the CBG series are prone to cavitation if suction resistance is too high, leading to rapid plate damage.

• Fluid Cleanliness: While gear pumps are more contamination-tolerant than piston pumps, maintaining oil cleanliness at ISO 4406 19/16 or better will significantly prolong service life.