Casappa AP300 Series Gear Pump Replacement | AP300/93 High-Pressure Hydraulic Pump

Genlu Hydraulic proudly introduces our industrial-grade AP300 Series high-pressure external gear pumps. This series is fully engineered to match global standards, providing a seamless, high-value drop-in replacement for Casappa AP300 original equipment, with full coverage across the AP100, AP200, and AP300 displacement ranges. We specifically highlight our supply capability for high-performance units such as the AP300/93 D 280 and AP300/93 D 2B80.

As a robust power source for heavy-duty mobile machinery, the AP300 series is renowned for its high volumetric efficiency and exceptional resilience against contamination. Genlu guarantees 100% Drop-in Interchangeability across mounting flanges (SAE), drive shaft splines, porting dimensions, and internal pressure-compensation architectures compared to original Casappa assemblies. Every pump undergoes 100% full-pressure load stability and volumetric verification on our digital benches, certifying consistent, high-torque output for demanding duty cycles.

Technical Specifications 

• Product Series: Casappa AP300 Series High-Pressure External Gear Pump

• Representative Models: AP300/93 D 280, AP300/93 D 2B80

• Geometric Displacement: 93.1 cc/rev (for AP300/93)

• Nominal Operating Pressure: 250 bar

• Peak Transient Pressure: 300 bar

• Maximum Rated Speed: 2500 rpm

• Pump Architecture: Pressure-compensated external gear design

• Drive Shaft Specification: Standard SAE Splined or Tapered Shaft

• Compatible Hydraulic Fluids: Mineral hydraulic oils, anti-wear fluids

• Approximate Unit Weight: 16.5 kg

Key Technical Advantages:

• Advanced Axial Pressure Compensation: Precision-engineered compensation plates dynamically adjust side-clearances in response to system pressure. This maximizes volumetric efficiency by minimizing internal leakage at peak loads.

• High-Strength Aluminum Housing: Constructed from forged high-strength aluminum alloy, the pump housing provides superior torsional rigidity and thermal conductivity, preventing thermal deformation during prolonged high-pressure operations.

• Precision-Ground Gear Profiles: The gear teeth are ground to ultra-high-precision involute profiles, reducing mesh vibrations and resulting in exceptionally smooth, quiet operation in sensitive environments.

• High-Pressure Sealing Integrity: Equipped with premium high-pressure shaft seals, the AP300 effectively resists thermal-induced fatigue, resolving common maintenance issues regarding leakage at the drive shaft interface.

Application Areas:

• Construction Equipment: Auxiliary pumps for excavators, mini-loaders, and heavy-duty earthmoving machinery.

• Agricultural Machinery: Power source for tractor hydraulic linkages and harvester auxiliary circuits.

• Industrial Power Packs: High-pressure power units for presses and stationary hydraulic systems.

Expert Maintenance Tips:

• Prevent Inlet Cavitation: The AP300 series requires consistent fluid flow at the suction port. Inadequate inlet supply can damage the internal compensation plates, leading to pressure decay. Periodically verify the condition of the suction filter.

• Enforce Fluid Cleanliness Standards: Maintain fluid cleanliness at ISO 4406 18/16/13. High-quality filtration is critical for longevity; always replace or clean the hydraulic filter when installing a new pump to prevent particulate wear.

• Perform Initial Priming: Manually fill the pump with clean hydraulic fluid through the inlet port before mounting. Operate under no-load conditions for 5-10 minutes to purge system air; aeration is the primary cause of internal gear-tip wear and must be avoided.