F1-081-R Parker F1 Series Axial Piston Motor 81.6cc

Product Overview:

The Parker F1 series (F1-25, F1-41, F1-51, F1-61, F1-81/F1-081-R, F1-101) are fixed-displacement bent-axis axial piston hydraulic motors designed for truck hydraulics, mobile equipment, and open-circuit industrial applications. Featuring spherical pistons with laminated piston rings and positive timing-gear synchronization, they deliver low leakage, high efficiency, and excellent resistance to temperature shocks. Manufactured to original Parker specifications for 100% drop-in interchangeability and fully tested under simulated operating conditions, these motors provide reliable high-pressure performance as direct replacements for genuine Parker F1 units.

Technical Specifications (Bulleted List):

• Model series: F1-25, F1-41, F1-51, F1-61, F1-81 (F1-081-R), F1-101
• Displacement: F1-25 = 25.6 cm³/rev; F1-41 = 40.9 cm³/rev; F1-51 = 51.1 cm³/rev; F1-61 = 59.5 cm³/rev; F1-81 = 81.6 cm³/rev; F1-101 = 102.9 cm³/rev
• Continuous operating pressure: 250 bar
• Intermittent operating pressure: 350 bar
• Continuous shaft speed: F1-25 = 2300 rpm; F1-41 = 2000 rpm; F1-51 = 1800 rpm; F1-61 = 1700 rpm; F1-81 = 1500 rpm; F1-101 = 1400 rpm
• Intermittent shaft speed: up to 3000 rpm (smaller sizes)
• Theoretical torque at 350 bar: F1-25 = 142 Nm; F1-41 = 227 Nm; F1-51 = 284 Nm; F1-61 = 331 Nm; F1-81 = 453 Nm; F1-101 = 572 Nm
• Control type: Fixed displacement, bi-directional (R = clockwise)
• Weight (approx.): 8.5 kg (F1-25 to F1-61); 12.5 kg (F1-81/F1-101)
• Key features: Bent-axis design, laminated piston rings, timing-gear synchronization, ISO mounting flange and shaft end

Key Technical Advantages:

1. Laminated piston rings combined with spherical pistons minimize internal leakage, maximize volumetric efficiency, and provide superior resistance to thermal shocks—ideal for demanding truck and mobile applications.
2. Positive timing-gear synchronization ensures precise piston-to-barrel coordination, reducing noise, vibration, and wear on bearings and rotating groups for extended service life.
3. High power density in a compact, lightweight package (as low as 8.5 kg) enables easy installation on truck PTOs and in space-constrained environments while delivering strong torque output.
4. Full dimensional, interface, and performance interchangeability with original Parker F1 motors, backed by 100% simulated duty-cycle testing, guarantees consistency, reliability, and lower maintenance and downtime costs.

Application Areas:

Truck hydraulic systems (cargo cranes, hook loaders, forestry cranes, concrete mixer trucks), mobile construction equipment, industrial hydraulic drives, material handling machinery, and other open-circuit applications requiring fixed-displacement high-pressure axial piston motors.

Expert Maintenance Tips:

1. Ensure the drain port is correctly connected (maximum drain pressure 3 bar) and that inlet pressure is adequate to prevent cavitation; maintain proper shaft and flange alignment.
2. Fully fill and bleed the unit before first start-up. Use high-quality mineral hydraulic oil with a viscosity around 30 mm²/s; protect against low-temperature starts and high-temperature shocks.
3. Periodically inspect piston rings and bearings for wear; monitor case temperature and external leakage. Avoid prolonged operation above intermittent pressure limits.
4. When replacing, confirm exact displacement, rotation direction (R/L), and port configuration match the original. Perform unloaded and loaded test runs after installation to verify proper function.