CBQL-E563/F532-CFH Gear Pump | CBQL-F550/F525-CFH Double Pump

The CBQL Series from LIC Hydraulic is a high-performance, multi-stage axial pressure-compensated gear pump. Specifically designed for heavy-duty construction machinery, models like the CBQL-E563/F532-CFH and CBQL-F550/F525-CFH combine two independent displacement pumps on a single drive shaft. This tandem configuration allows for the simultaneous powering of steering and working hydraulic circuits. Constructed with high-strength aluminum bodies and ductile iron covers, these pumps are 100% load-tested to ensure durability under peak pressures. We guarantee 100% mechanical interchangeability for a seamless, cost-effective replacement of OEM components.

Technical Specifications 

• Series: CBQL Series (High Pressure Double Pump)

• Displacement Combinations:

  • E563/F532: Front $63\text{ ml/r}$ / Rear $32\text{ ml/r}$

  • F550/F525: Front $50\text{ ml/r}$ / Rear $25\text{ ml/r}$

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

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

• Max Speed: $2500\text{ RPM}$

• Rotation: C (Clockwise)

• Mounting: F (Flange mounting)

• Shaft Type: H (Spline or custom)

Key Technical Advantages

• Floating Bushing Technology: Utilizing axial pressure compensation, the floating bushings automatically adjust clearances based on system pressure. This ensures a consistent volumetric efficiency of over $93\%$, even after prolonged high-pressure operation.

• High-Capacity DU Bearings: Equipped with premium composite bearings, the CBQL series operates with minimal friction under high speeds and heavy loads, significantly reducing heat generation and extending service life.

• Optimized Vibration Dampening: The three-piece housing and precision-ground gear sets are designed to minimize flow ripple and mechanical vibration, protecting your hydraulic lines and enhancing overall machine stability.

• Compact Integration: By consolidating multiple circuits into a single tandem unit, the CBQL series reduces the need for multiple PTOs, simplifies plumbing, and saves valuable installation space.

Application Areas

• Wheel Loaders: Main pump for steering and lifting circuits in 3-ton to 5-ton loaders.

• Road Rollers & Pavers: Powering vibration mechanisms and auxiliary propulsion.

• Sanitation Trucks: Multipurpose hydraulic drives for waste compaction and sweeping.

• Mining Equipment: Power source for medium-duty drilling rigs and conveyors.

Expert Maintenance Tips

• Suction Line Integrity: Given the high flow rates of tandem pumps, ensure the suction line is airtight and adequately sized. Keep intake fluid velocity below $1.5\text{ m/s}$ to prevent cavitation and internal pitting.

• Circuit Calibration: After installation, perform separate pressure tests for the front and rear sections to ensure that each circuit’s relief valves are correctly calibrated to design specifications.

• Filtration Standards: To protect the precision gear surfaces, maintain an oil cleanliness level of at least ISO 18/16/13 (NAS 9). High-efficiency return filters ($20\text{ }\mu\text{m}$) are highly recommended.

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