CBQ-F550-AFPL CBQ-F573-AFP Hydraulic Gear Pump | High Pressure External Gear Pump

The CBQ-F500 Series (including CBQ-F550 and CBQ-F573) by Chengyuan Hydraulic is a high-pressure external gear pump engineered for demanding mobile and industrial hydraulic applications. Constructed with a high-strength three-piece cast iron housing, this series offers superior pressure stability and impact resistance. We guarantee 100% original-place interchangeability with global standards. Every CBQ pump undergoes 100% simulated condition testing at our facility to ensure that volumetric efficiency and mechanical reliability exceed OEM requirements.

Technical Specifications (Bulleted List)

• Model Codes: CBQ-F550-AFPL, CBQ-F573-AFP

• Displacement: $50\text{ ml/rev, } 73\text{ ml/rev}$

• Rated Pressure: $25\text{ MPa (3625 psi)}$

• Peak Pressure: $28\text{ MPa (4060 psi)}$

• Rated Speed: $2000\text{ RPM}$

• Max Speed: $2500\text{ RPM}$

• Mounting: Standard 4-bolt Flange (AFP/AFPL)

• Shaft Configuration: Splined Shaft (AFP) or Straight Keyed Shaft (AFPL)

• Weight: Approx. $12.5\text{–}14.8\text{ kg}$

Key Technical Advantages

• High-Tensile Cast Iron Casing: The body is crafted from premium anti-wear cast iron with secondary aging treatment. Compared to aluminum alternatives, it offers $30\%$ higher fatigue resistance under high-pressure pulsation cycles.

• Axial Clearance Floating Compensation: Utilizing floating side-plate technology, the pump automatically adjusts the end-face clearance based on working pressure. This keeps the volumetric efficiency above $92\%$ and significantly reduces heat generation.

• Self-lubricating DU Bearings: Equipped with high-performance composite bearings, the CBQ series provides excellent radial load support and shock absorption. This reduces friction loss and ensures a Long-life Service Cycle under heavy loads.

• Precision-Ground Gear Profile: Gears are manufactured from high-alloy steel with micro-grinding and tooth-shaving processes. This high-precision engagement ensures Low Noise Operation and smooth flow delivery at high speeds.

Application Areas

• Construction Machinery: Auxiliary hydraulic circuits for excavators, loaders, and bulldozers.

• Road Machinery: Steering and auxiliary systems for road rollers, graders, and pavers.

• Lifting Equipment: Outrigger and swing control circuits for truck cranes and mobile hoists.

Expert Maintenance Tips

• Inlet Vacuum Control: Ensure the suction filter’s flow capacity is at least $2$ times the pump’s rated flow to prevent cavitation damage.

• Pre-Lubrication: Before the initial startup, fill the pump with clean hydraulic oil through the outlet port. Never start the pump dry, as it will cause immediate damage to the internal bushings and plates.

• Rotation Verification: The CBQ series has a specific rotation direction. Verify the drive motor’s rotation before installation; incorrect rotation will cause immediate shaft seal failure.