CBQ-F550-CFPL Hydraulic Gear Pump 50 cm³/rev 20 MPa

Product Overview

The CBQ series is a representative high-pressure external gear pump product line, covering models including CBQ-F550, CBQ-F560, CBQ-F563AFHL, CBQ-G540-AFP, CBQ-F550-CFPL, and CBQ-F563-CFPL, with displacements ranging from 20 to 63 cm³/rev. These pumps are widely used in forklifts, construction machinery, agricultural equipment, and various industrial hydraulic systems.

As a professional hydraulic component manufacturer, we provide 100% interchangeable replacement solutions for the CBQ series. Every CBQ series gear pump undergoes 100% performance testing under simulated actual operating conditions—from displacement accuracy and pressure stability to volumetric efficiency—fully benchmarked against industry-leading standards.

The CBQ series pump body is manufactured from high-strength aluminum alloy, achieving significant weight reduction while maintaining structural rigidity. Gear units are precision-machined and hardened, featuring an axial clearance auto-compensation mechanism that ensures the pump maintains high efficiency throughout its entire service life.

Model Code Explanation:

• CBQ: Product code

• Pressure Grade: F = 20 MPa; G = 25 MPa

• Gear Modulus: 5

• Nominal Displacement: Number (e.g., 550 = 50 cm³/rev, 560 = 60 cm³/rev, 563 = 63 cm³/rev)

• Mounting Type: A = Oval flange; C = Square flange

• Port Type: F = Flange connection; S = Metric thread; G = Inch thread

• Shaft Type: P = Plain key; H = Rectangle spline; Φ = SAE spline

• Rotation: L = Left-hand (counter-clockwise); R = Right-hand (clockwise, may be omitted)

Technical Specifications 

CBQ-F550 / CBQ-F550-CFPL

• Series: CBQ-F5 high-pressure gear pump

• Nominal Displacement: 50 cm³/rev

• Rated Pressure: 20 MPa (200 bar)

• Peak Pressure: 25 MPa (250 bar)

• Minimum Speed: 500 min⁻¹

• Rated Speed: 2,000 min⁻¹

• Maximum Speed: 2,500 min⁻¹

• Volumetric Efficiency: ≥ 93%

• Housing Material: High-strength aluminum alloy

• Gear Modulus: 5

• Mounting Type: Oval flange (A)

• Port Type: Flange connection (F)

• Shaft Type: Plain key (P) / Rectangle spline (H) optional

• Rotation: Left-hand (L) / Right-hand (R) optional

• Inlet Diameter: 35 mm

• Outlet Diameter: 25 mm

• Weight: Approx. 7.3 kg

CBQ-F560

• Series: CBQ-F5 high-pressure gear pump

• Nominal Displacement: 60 cm³/rev

• Rated Pressure: 20 MPa

• Peak Pressure: 25 MPa

• Minimum Speed: 500 min⁻¹

• Rated Speed: 2,000 min⁻¹

• Maximum Speed: 2,500 min⁻¹

• Volumetric Efficiency: ≥ 93%

• Housing Material: High-strength aluminum alloy

• Gear Modulus: 5

• Weight: Approx. 8.0 kg

CBQ-F563 / CBQ-F563-CFPL / CBQ-F563AFHL

• Series: CBQ-F5 high-pressure gear pump

• Nominal Displacement: 63 cm³/rev

• Rated Pressure: 20 MPa

• Peak Pressure: 25 MPa

• Minimum Speed: 500 min⁻¹

• Rated Speed: 2,000 min⁻¹

• Maximum Speed: 2,500 min⁻¹

• Volumetric Efficiency: ≥ 93%

• Housing Material: High-strength aluminum alloy / Cast iron (AFHL suffix)

• Gear Modulus: 5

• Operating Temperature: 30–90°C

• Inlet Diameter: 35 mm

• Outlet Diameter: 25 mm

• Weight: Approx. 8.0 kg

CBQ-G540-AFP

• Series: CBQ-G5 high-pressure gear pump

• Nominal Displacement: 40 cm³/rev

• Rated Pressure: 25 MPa

• Peak Pressure: 28 MPa

• Minimum Speed: 600 min⁻¹

• Rated Speed: 2,500 min⁻¹

• Maximum Speed: 3,000 min⁻¹

• Volumetric Efficiency: ≥ 93%

• Housing Material: Cast iron

• Gear Modulus: 5

• Mounting Type: Oval flange (A)

• Port Type: Flange connection (F)

• Shaft Type: Plain key (P)

• Weight: Approx. 6.8 kg

Important Note: The above specifications are compiled from publicly available industry technical data. Different suffix codes (CFPL, AFHL, AFP, etc.) represent different mounting configurations, sealing options, and housing materials. CBQ-F563AFHL features a cast iron housing for higher strength requirements; CBQ-F550-CFPL and CBQ-F563-CFPL feature plain key shaft configurations. Please refer to the product nameplate or technical agreement for exact specifications.

Key Technical Advantages

1. High-Strength Aluminum Alloy Housing — Lightweight with High Strength

The CBQ series pump body is manufactured from high-strength aluminum alloy, achieving significant weight reduction while maintaining structural rigidity and impact resistance. With total weight ranging from only 5.7 to 8.0 kg, it is substantially lighter than traditional cast iron pump bodies—particularly suitable for weight-sensitive applications such as forklifts and mobile machinery.

2. Axial Clearance Auto-Compensation — High Efficiency Throughout Service Life

The CBQ series features an axial clearance auto-compensation mechanism, which automatically compensates for clearance changes caused by wear and thermal expansion through precision fit between floating side plates and gear end faces. This design ensures the pump maintains high volumetric efficiency (≥ 92–93%) throughout its entire service life, significantly extending effective product lifespan.

3. Large Modulus Gear Design — High Strength and Reliability

With a gear modulus of 5, the CBQ series far exceeds the modulus standards of ordinary gear pumps. Large modulus gears offer higher tooth root strength and bending resistance, capable of withstanding greater impact loads—delivering exceptional reliability in heavy-duty applications such as construction machinery.

4. Wide Speed Range — Excellent Operating Condition Adaptability

The CBQ series supports a wide speed range of 500–3,000 min⁻¹. Even at speeds as low as 500 min⁻¹, it maintains high volumetric efficiency, ensuring stable operation during idle or low-speed conditions. High-speed capability meets the demands of high-productivity operations.

5. Flexible Configuration Options — Meeting Diverse Requirements

The CBQ series offers rich configuration options—including plain key, rectangle spline, and SAE spline shaft types; oval and square flange mounting types; and flange, metric thread, and inch thread port types. Both aluminum alloy and cast iron housing materials are available—cast iron housing (AFHL suffix) is recommended for applications requiring higher strength and wear resistance.

Application Areas

• Forklift Hydraulic Systems: Hydraulic power pumps for 4.5-ton forklifts

• Construction Machinery: Hydraulic systems for loaders, rollers, excavators, and related equipment

• Agricultural Machinery: Tractor hydraulic suspension systems

• Mining Machinery: Hydraulic power supply for underground equipment

• Industrial Hydraulic Power Units: Various industrial hydraulic stations

• Metallurgical Equipment: Continuous casting and rolling mill hydraulic systems

• Sanitation & Environmental Equipment: Garbage compactors, street sweepers, etc.

• Light Industry Machinery & Dump Trucks: Hydraulic lifting systems for dump trucks

Expert Maintenance Tips

1. Verify Rotation Direction

CBQ series pumps must only be operated in the specified rotation direction. Always verify that the rotation direction marked in the model code — L = Left-hand (counter-clockwise), R = Right-hand (clockwise)— matches the drive motor’s rotation. Reverse operation will prevent proper suction and damage the shaft seal.

2. Never Run Dry

Avoid dry running under all circumstances. Ensure the pump cavity is fully filled with hydraulic fluid before startup; otherwise, severe wear or seizure of gears and bearings may occur.

3. Fluid Cleanliness Management

Gear pumps are sensitive to fluid cleanliness. Maintain fluid cleanliness to ISO 4406 19/16 or better. Install appropriately rated filters on the pump suction side and regularly inspect filter element condition. Operating temperature range is 30–90°C.

4. Speed and Pressure Limits

• F Pressure Grade (F550/F560/F563): Rated pressure 20 MPa, peak 25 MPa; minimum speed 500 min⁻¹, maximum 2,500 min⁻¹

• G Pressure Grade (G540): Rated pressure 25 MPa, peak 28 MPa; minimum speed 600 min⁻¹, maximum 3,000 min⁻¹

• Peak pressure is permitted for short-term transient conditions only — never exceed rated pressure during continuous operation

5. Housing Material Selection Considerations

• Aluminum alloy housing (standard CBQ-F5 series): Lightweight with good heat dissipation, suitable for standard operating conditions

• Cast iron housing (CBQ-F563AFHL and other AFHL suffix models): Higher strength and better wear resistance, recommended for heavy-duty applications with high impact and high loads

• Select the appropriate housing material based on actual operating load intensity and impact frequency

6. Regular Inspection and Maintenance

Inspect the system filter element condition every 500 operating hours. Regularly monitor the pump for abnormal operating noise—if abnormal noise or system pressure drop is detected, shut down immediately for inspection. While the axial clearance auto-compensation mechanism maintains high efficiency over the long term, professional service is recommended when significant performance degradation is observed.