AP300/75 D 280 Bucher High Pressure Gear Pump AP300 Series

Product Overview

The AP300/75 D 280 is a high-pressure external gear pump from the Bucher Hydraulics AP300 series (part of the broader AP100/AP200/AP300 family). With a displacement of 75 cm³/rev and clockwise rotation (D), it features an aluminum alloy body with cast-iron covers and optimized hydraulic compensation for high volumetric efficiency and long service life. This unit offers direct bolt-on interchangeability with OEM parts and undergoes 100% simulated duty testing for reliable high-pressure performance in mobile and industrial hydraulic systems.

Technical Specifications 

• Model: AP300/75 D 280 (also AP30075D280; S version available for counter-clockwise rotation)
• Pump type: External gear pump
• Displacement: 75.0 cm³/rev (4.575 in³/rev)
• Continuous pressure (P1): 170 bar (2400 psi)
• Intermittent pressure (P2): 190 bar (2700 psi)
• Peak pressure (P3): 220 bar (3150 psi)
• Minimum speed: Approx. 550–700 rpm (pressure-dependent)
• Maximum speed: 2000–2500 rpm (pressure-dependent)
• Rotation: D = Clockwise
• Materials: Aluminum alloy body, cast-iron front/rear covers, standard NBR seals
• Series: AP300 (family includes AP100, AP200, AP300 with wide displacement range)
• Notes: Optimized hydraulic compensation for high overall efficiency; recommended for mineral oil-based hydraulic fluids complying with ISO/DIN standards

Key Technical Advantages

1. True drop-in interchangeability: Manufactured to OEM dimensional and porting standards for bolt-on replacement without modifications, minimizing downtime.
2. High volumetric efficiency: Optimized hydraulic compensation design minimizes internal leakage for consistent flow and pressure output over the service life.
3. Robust construction & durability: Lightweight aluminum body combined with high-strength cast-iron covers and precision gears/plain bearings for continuous heavy-duty operation.
4. Wide operating range: Peak pressure up to 220 bar with flexible speed limits, low noise and high reliability across applications.
5. 100% simulated duty testing: Full pressure, flow, noise and endurance verification before shipment ensures ready-to-install performance.

Application Areas

• Agricultural machinery (tractors, harvesters)
• Construction and earth-moving equipment
• Forklifts, aerial work platforms and sweepers
• Hydraulic lifts and industrial power units
• Mobile and stationary systems requiring medium-to-high pressure gear pumps

Expert Maintenance Tips

• Confirm rotation direction (D = clockwise) and flange interface before installation; use recommended mineral oil-based fluids and maintain proper viscosity and cleanliness (ISO 4406).
• Start at low speed unloaded; check for leaks and noise. Avoid simultaneous maximum pressure and maximum speed.
• Regularly inspect seals and bearings; keep fluid clean to protect gear meshing surfaces.
• Ensure adequate suction line sizing to prevent cavitation; follow recommended pressure-line velocities.
• For multi-pump assemblies or special flange versions (e.g., FP), verify the exact order code and consult technical support.