CBQL-E563/F550-CFH Double Gear Pump | CBQL-F550/F540-AFP | High Pressure Tandem Pump

LIC Hydraulic offers the CBQL Series Tandem Gear Pumps, a heavy-duty hydraulic solution built with high-strength cast iron housing. This dual-section design allows a single input shaft to power two independent pump sections, providing separate flow streams for different hydraulic circuits (e.g., main implements and steering). Engineered for the rigors of construction and mining environments, the CBQL series is renowned for its durability and high-pressure performance. Our units offer 100% drop-in interchangeability with original factory components, ensuring a perfect fit and reliable operation.

Technical Specifications

• Model 1: CBQL-E563/F550-CFH (63cc front / 50cc rear)

• Model 2: CBQL-F550/F540-AFP (50cc front / 40cc rear)

• Pressure Rating: 16 – 25 MPa (2320 – 3625 psi)

• Max Speed: 2000 – 2500 rpm

• Construction: High-tensile Wear-resistant Cast Iron

• Efficiency: $\geq 90\%$ Volumetric Efficiency

• Shaft/Flange: Available in standard SAE splined shafts and 2-bolt/4-bolt mounting patterns.

Key Advantages

• High-Pressure Stability: Features axial clearance compensation with floating side plates, maintaining high efficiency even under continuous high-load cycles.

• Dual-Circuit Independence: The front and rear pump chambers are fully isolated, preventing pressure interference between circuits and enhancing control precision for complex machinery.

• Low Noise Profile: Precision-ground gears with optimized tooth profiles minimize hydraulic ripple and vibration, extending the life of downstream valves and hoses.

• Superior Thermal Resistance: The cast iron body provides excellent dimensional stability across a wide temperature range, reducing internal bypass and overheating issues.

Common Applications

• Wheel Loaders: Combined power for lift/tilt and steering systems.

• Mobile Cranes: Dual flow for winch and slew operations.

• Motor Graders: Powering blade control and auxiliary hydraulics.

• Sanitation Trucks: High-flow supply for compactor and tailgate mechanisms.

Expert Maintenance Tips

• Filter Management: Maintain hydraulic fluid at ISO 19/16 cleanliness levels. Particles are the primary cause of side plate scoring and efficiency loss.

• Prevent Aeration: Due to the high total flow rate, ensure the inlet suction line is perfectly sealed. Any air ingress will cause cavitation, leading to rapid internal destruction of the gears.

• Shaft Alignment: Precise alignment with the prime mover is critical. Ensure the shaft coupling is free of radial loads to prevent premature shaft seal failure or bearing seizure.