F12-060-RS-SV-T-000-0000-00 378054 Parker Bent Axis Fixed Motor

Product Overview

The F11/F12 series bent-axis fixed displacement piston motors are a flagship product line within the Parker Hannifin hydraulic transmission platform, classified as heavy-duty fixed displacement motor/pump series. Featuring a 40° bent-axis design with unique spherical pistons, these units are specifically engineered for demanding applications in both open and closed loop circuits. Designed to fully comply with Parker F11/F12 series mounting and interface standards, these motors offer 100% direct interchangeability with original Parker units—enabling plug-and-play replacement without any管路 modifications or adapter plates, significantly minimizing downtime and retrofit costs.

The F11/F12 series covers a wide displacement range from 5 to 250 cm³/rev. The F11 series is available in displacements 5, 6, 10, 12, 14, 19, 150, and 250 cm³/rev, while the F12 series covers 30, 40, 60, 80, 90, 110, 125, 152, 162, 182, and 250 cm³/rev. The unique timing gear design synchronizes shaft and cylinder barrel rotation, making the F11/F12 series highly tolerant to high ‘G’ forces and torsional vibrations. The laminated piston ring offers important advantages such as low internal leakage and thermal shock resistance. Every unit undergoes 100% factory testing under simulated real-world working conditions, validating pressure, flow, volumetric efficiency, and performance characteristics before shipment—ensuring reliable operation from the very first start.

Model Code Interpretation:

F12-060-RS-SV-T-000-0000-00

• F12 – Series code: Bent-axis fixed displacement motor/pump

• 060 – Displacement size: 59.8 cm³/rev

• RS – Rotation direction and shaft configuration (right-hand rotation / standard shaft)

• SV – Port configuration and mounting flange type

• T – Seal material and temperature range

• 000-0000-00 – Specific configuration code (standard version)

Technical Specifications 

F12-060-RS-SV-T-000-0000-00

• Model: F12-060-RS-SV-T-000-0000-00 (Part No.: 378054)

• Type: Bent-axis fixed displacement piston motor (heavy-duty)

• Displacement: 59.8 cm³/rev (3.65 in³/rev)

• Maximum Intermittent Pressure: 500 bar (7,252 psi)

• Maximum Continuous Pressure: 450 bar (6,527 psi)

• Maximum Intermittent Speed: 6,400 r/min

• Maximum Continuous Speed: 5,800 r/min

• Piston Count: 7 or 9-piston design

• Shaft-to-Barrel Angle: 40°

• Weight: Approx. 30 kg

• Housing Material: High-strength cast iron

• Medium: Mineral oil, synthetic hydraulic oil

• Operating Temperature Range: -40°C to +80°C (standard seals)

F11/F12 Series (Available Displacements) :

• F11 Displacement Options: 5, 6, 10, 12, 14, 19, 150, 250 cm³/rev

• F12 Displacement Options: 30, 40, 60, 80, 90, 110, 125, 152, 162, 182, 250 cm³/rev

• F11 Continuous Pressure: Up to 350 bar

• F11 Intermittent Pressure: Up to 420 bar

• F12 Continuous Pressure: Up to 450 bar

• F12 Intermittent Pressure: Up to 500 bar

Key Technical Advantages

1. 100% Direct Interchangeability – Zero Modification Required

The F11/F12 series is engineered to exact Parker mounting and interface specifications, with identical dimensions, port locations, and shaft end configurations. End users can replace original units directly without any管路 modifications or adapter plates—transforming unplanned downtime into scheduled, rapid maintenance while significantly reducing spare parts procurement costs and equipment downtime losses.

2. Unique Spherical Piston Design with 40° Bent-Axis Configuration

The spherical piston design with pistons positioned at a 40° angle relative to the drive shaft delivers exceptional power density while allowing unusually high shaft speeds. The compact, lightweight design enables the F11/F12 series to output superior performance within limited installation spaces.

3. Laminated Piston Ring Technology – Low Leakage and Thermal Shock Resistance

The laminated piston ring provides critical technical advantages—low internal leakage and excellent thermal shock resistance. This design significantly improves volumetric efficiency while enhancing reliability under severe temperature fluctuation conditions.

4. Timing Gear Design – High Vibration and Torsional Resistance

The unique timing gear design synchronizes shaft and cylinder barrel rotation, making the F11/F12 series highly tolerant to high ‘G’ forces and torsional vibrations. Heavy-duty roller bearings permit substantial external axial and radial shaft loads. The simple and straightforward design with very few moving parts results in exceptionally high reliability and long service life.

5. Superior Starting Torque and Low-Speed Performance

F11/F12 motors produce very high torque at start-up as well as at low speeds. The 7 or 9-piston design provides high starting torque and smooth motor operation.

6. 100% Factory Testing Under Simulated Working Conditions

Every F11/F12 series unit undergoes rigorous factory testing under simulated real-world conditions, validating pressure, flow, volumetric efficiency, noise levels, and thermal characteristics across the full operating range. Test media match actual operating conditions, ensuring each unit is ready for immediate installation and reliable operation upon delivery—eliminating the risk of “dead on arrival” components.

Application Areas

The F11/F12 series motors are widely deployed across the following industries and equipment types:

• Construction Machinery: Excavators, cranes, loader travel/swing drives

• Road Construction Equipment: Rollers, asphalt pavers

• Saw and Forestry Machinery: Saw motor versions extensively validated in extreme applications

• Mining Equipment: Mining machinery, drilling rigs

• Agricultural Machinery: Combine harvesters, tractors

• Marine & Shipbuilding: Marine winches, deck machinery

• Industrial Equipment: Injection molding machines, presses, conveyors

• Fan Drives: Fan motor applications

Expert Maintenance Tips

1. Hydraulic Fluid Cleanliness Management

The F11/F12 series utilizes bent-axis piston designs with minimal clearances between pistons and cylinder bores, making them highly sensitive to fluid contamination. It is recommended to install filters with ≤10μm filtration rating, maintaining fluid cleanliness to ISO 4406 19/17/14 or better. Never use degraded or substandard hydraulic fluids.

2. Case Drain and Backpressure Control

Ensure the case drain line is unrestricted with no flow restrictions. F11/F12 series case backpressure must not exceed 2 bar (29 psi) continuous and 10 bar (145 psi) peak. Excessive case backpressure will cause shaft seal damage and premature bearing failure. The drain line should return directly to the reservoir, not in parallel with the return line.

3. Air Bleeding and Pre-filling Before Start-up

Always bleed air from the motor housing via the highest vent port before initial start-up or after extended shutdown periods to prevent cavitation damage. Ensure the motor housing is completely filled with hydraulic fluid prior to starting.

4. Coupling Alignment Requirements

Maintain shaft alignment within 0.05 mm concentricity and 0.5° angular deviation between the drive shaft and the load shaft. Excessive misalignment will lead to premature bearing wear and shaft seal leakage. The use of flexible couplings is recommended to compensate for minor installation deviations. The F11/F12 series heavy-duty roller bearings can accommodate substantial external axial and radial loads, but proper alignment remains essential.

5. Temperature Monitoring

Standard seal operating temperature range for the F11/F12 series is -40°C to +80°C. For higher temperature applications, special seal options are available (up to +100°C). Monitor housing temperature during operation to avoid exceeding seal limits.

6. Periodic Inspection and Maintenance

Inspect shaft seals for leakage and listen for abnormal operating noise every 1,000 operating hours or every 6 months (whichever comes first). If reduced volumetric efficiency or insufficient output torque is observed, timely overhaul of the piston assembly and valve plate is recommended.