Casappa AP200 AP300 Series Gear Pump | AP200/22 D 245 | AP300 Triple Pump

The Casappa AP Series from LIC Hydraulic is a premier line of Modular Aluminum Gear Pumps engineered for maximum versatility and power density. Available in AP200 and AP300 frame sizes, these pumps feature a three-piece construction that allows for extreme customization. Models like the AP200/22 S 245 and the multi-section AP300/53D818-FP are the preferred choice for mobile equipment requiring independent flows for multiple functions. We provide 100% drop-in replacements, matching original Casappa specifications for mounting flanges, splined shafts, and porting patterns.

Technical Highlights

• Displacement Range: AP200 ($14\text{–}30\text{ cc}$), AP300 ($27\text{–}92\text{ cc/rev}$).

• Max Operating Pressure: Rated for continuous duty up to $250\text{–}280\text{ bar}$ ($4060\text{ psi}$).

• Body Material: High-tensile aluminum alloy with reinforced iron end caps.

• Drive Options: Wide range of SAE A, B, and C shafts and mounting configurations.

Core Advantages

• High Efficiency via Axial Compensation: The floating bushing blocks automatically adjust to pressure changes, maintaining an optimal seal against the gear faces. This results in superior volumetric efficiency even under high-load and high-temperature conditions.

• Customizable Multi-Section Design: The AP series allows for the integration of multiple pump stages from a single drive shaft, reducing the need for complex gearboxes and saving significant space in engine compartments.

• Rugged Durability: Hardened steel gears and high-load capacity bushings provide smooth operation and high resistance to cavitation and fluid contamination, common in construction and mining environments.

• Low Noise Output: Specialized gear profiles and a rigid body design dampen hydraulic ripples and mechanical vibrations, meeting strict indoor and outdoor noise emissions standards.

Expert Maintenance Tips

• Shaft Alignment: When replacing an AP series pump, ensure perfect alignment with the drive motor. Misalignment is the leading cause of premature shaft seal failure and bearing wear in modular pumps.

• Priming the System: Always pre-fill the pump through the suction port before the first start. Running an AP300 series pump “dry” will cause the pressure-compensated bushings to seize within seconds.

• Filtration Integrity: To protect the precision-lapped side plates and gear faces, maintain a fluid cleanliness level of ISO 18/16/13. Particulate matter in the oil is the primary driver of internal leakage and efficiency loss.