CBQL Series Double Gear Pump | CBQL-F540/F532-CFH | CBQL-F525/F520-CFH

LIC Hydraulic’s CBQL Series tandem high-pressure gear pumps are the heavy-duty powerhouses of modern hydraulic systems. Specifically engineered for models like CBQL-F540/F532-CFH and CBQL-F525/F520-CFH, these pumps deliver dual independent oil flows from a single drive shaft. We guarantee 100% Drop-in Interchangeability for OEM maintenance. Every CBQL unit undergoes 100% factory load testing for volumetric efficiency and pressure stability to ensure peak performance in tipper trucks, mobile cranes, and industrial power units.

Technical Specifications

• Series ID: CBQL (Tandem High-Pressure Gear Pump)

• Primary Models: CBQL-F540/F532-CFH / CBQL-F525/F520-CFH

• Nominal Pressure (F Grade): 20 MPa (2900 PSI)

• Max Pressure: 25 MPa (3625 PSI)

• Displacement Combinations:

  • 40/32: Front 40 ml/r, Rear 32 ml/r

  • 25/20: Front 25 ml/r, Rear 20 ml/r

• Body Material: High-tensile Cast Iron for maximum structural integrity.

• Efficiency: ≥ 93% (at rated speed and pressure)

Key Technical Advantages

• Automatic Axial Compensation: Features floating side plates that use system pressure to optimize clearances. This ensures high volumetric efficiency even after thousands of operational hours.

• Reinforced Bearing Architecture: Equipped with heavy-duty composite bearings designed to handle high radial loads, significantly extending service life in demanding high-speed applications.

• Efficient Tandem Design: The CBQL integrates two pump groups into one compact housing, reducing the footprint and simplifying hydraulic piping for mobile equipment.

• Robust Contamination Tolerance: Unlike sensitive piston pumps, the CBQL gear pump offers superior resilience against minor oil impurities, making it ideal for harsh construction site conditions.

Expert Maintenance Tips

• Rotation Check: Always verify the rotation direction (Clockwise or Counter-clockwise) based on your PTO or engine drive. Operating a gear pump in the wrong direction will cause immediate seal failure.

• Inlet Sizing: Ensure the suction line is large enough to supply both pump stages simultaneously. Cavitation is the primary cause of noise and internal erosion in tandem pumps.

• Oil Quality: Maintain system filtration at ISO 4406 20/18/15 or better. Clean oil prevents premature wear on the gear teeth and side plates.