Parker F11-250 Bent Axis Fixed Displacement Motor 242cc 350bar

Product Overview

The Parker F11-250 is a Parker Hannifin F11 series bent-axis fixed-displacement axial piston motor/pump (larger sizes corresponding to F12 series updates), featuring a patented spherical piston design and gear synchronization for open and closed circuit high-speed, high-pressure applications. With a displacement of approximately 242 cm³/rev, continuous operating pressure up to 350 bar, and intermittent pressure up to 420 bar, it offers high overall efficiency and power-to-weight ratio. Our F11-250-LF-SH-S-000, F11-250-QF-SE-D-000, F11-250-RF-SH-F-000 and related configurations are manufactured to original technical specifications, providing 100% interchangeability (flange, shaft end, and port positions fully match OEM) and 100% simulated-duty testing. They deliver reliable performance under high-speed, high-pressure, and heavy-duty conditions as cost-effective direct replacements for genuine Parker F11/F12 units.

Technical Specifications 

• Models: F11-250-LF-SH-S-000; F11-250-QF-SE-D-000; F11-250-RF-SH-F-000 (series F11-250 and related)
• Displacement: approx. 242 cm³/rev
• Continuous pressure: up to 350 bar
• Intermittent/peak pressure: up to 420 bar (short duration)
• Maximum continuous speed: approx. 2400–2700 rpm
• Maximum intermittent speed: approx. 3000 rpm
• Minimum continuous speed: 50 rpm
• Control: Fixed displacement (usable as pump or motor, bidirectional)
• Approx. weight: 77 kg
• Design: Bent-axis fixed-displacement piston motor/pump for open and closed circuits

Key Technical Advantages

1. Patented spherical piston and gear synchronization design deliver the highest overall efficiency, excellent starting torque, smooth operation, and outstanding power-to-weight ratio.
2. Supports high speeds and pressures, ideal for high-speed indirect drives and heavy-duty applications with long service life and high reliability.
3. Compact construction and optimized sealing provide low noise and strong resistance to thermal shock, with flexible use in both open and closed circuits.
4. Full dimensional and performance interchangeability plus rigorous simulated-duty testing guarantee drop-in replacement of original Parker units, minimizing downtime and lifecycle costs.

Application Areas

Suitable for construction equipment, forestry machinery, agricultural machinery, mining equipment, marine and offshore applications, municipal vehicles, and industrial hydraulic systems requiring high speed, high pressure, and compact design. Typical uses include excavators, loaders, crushers, fan drives, winches, conveyor systems, and various high-speed open/closed-circuit transmissions.

Expert Maintenance Tips

• Verify exact match of mounting flange, shaft end, and port orientation before installation; avoid forced assembly that can damage seals or bearings.
• Maintain hydraulic fluid cleanliness to recommended standards; regularly check case drain pressure and temperature.
• When used as a pump, observe self-priming speed limits; when used as a motor, monitor minimum speed and flow to prevent cavitation.
• Use matching filter elements and seals during service; record operating pressure and speed profiles to detect early efficiency decline.