Parker F12-080-MS-SV-U-000-000-0 Hydraulic Motor 3780786

Parker F12-080-MS-SV-U-000-000-0 Hydraulic Motor (Part No. 3780786)

The Parker F12-080-MS-SV-U-000-000-0 (Part Number: 3780786) is a heavy-duty, fixed-displacement axial piston motor belonging to Parker’s renowned F12 series. Designed with a robust 40-degree bent-axis configuration, this unit is engineered to endure extreme operating pressures and high rotational speeds in demanding marine, mobile, and industrial hydraulic circuits. Featuring an 80.4 cm³/rev displacement, high volumetric efficiency, and exceptional thermal shock resistance, this motor provides reliable power transfer under continuous high-load conditions.

Model Details

• Manufacturer: Parker Hannifin
• Series: F12 (Fixed Displacement Bent-Axis Piston Motor/Pump)
• Model Code: F12-080-MS-SV-U-000-000-0
• Part Number (MPN): 3780786
• Condition: New / Unused Surplus

Technical Details: Parker F12-080 Hydraulic Motor

Important Features

1. High Power-to-Weight Ratio: The compact 40-degree bent-axis design minimizes envelope dimensions and maximizes output capacity.
2. Laminated Piston Rings: Best in class internal sealing, excellent resistance to thermal shock and low mechanical loss.
3. Heavy-Duty Bearings – Uses rugged roller bearings that can handle high external radial and axial shaft stresses.
4. Integrated Timing Gear: Locking the cylinder barrel and the shaft with excellent tolerance to extreme G-forces and torsional vibrations.

Applications

• Marine winch drives, steering gear systems, and deck machinery
• Offshore crane drives and heave compensation units
• Heavy mobile construction equipment (excavators, loaders)
• Forestry harvesters and industrial shredders

Engineer Expert’s Guide

Marine Engineer’s Recommendation: When commissioning this high-speed piston motor in marine steering or deck crane applications, ensure the case drain line is routed directly back to the hydraulic tank above the fluid level with an independent connection. Never loop or restrict the drain line, as backpressure exceeding 2 bar will blow the high-pressure shaft seal (FPM/Viton). Additionally, pre-fill the motor housing with clean hydraulic fluid through the highest drain port prior to initial start-up to prevent dry-running friction on the piston slippers during system priming.

Frequently Asked Questions (FAQs)

What is the primary difference between a Parker F11 and F12 series motor?

The F12 series features a rigid 40-degree angle design with heavy-duty roller bearings capable of handling higher external shaft loads and higher peak operating speeds (up to 6,700 RPM intermittent) compared to legacy iterations.

Can this motor run safely in reverse rotation?

Yes, the Parker F12-080 is fully bidirectional, supporting both clockwise and counter-clockwise rotation depending on fluid inlet port direction.

What viscosity grade of hydraulic oil is recommended for this motor?

For optimum performance and bearing life, use anti-wear (HM/HV) hydraulic fluids with a recommended operating viscosity range between 15 to 30 mm²/s (cSt), ensuring fluid cleanliness meets or exceeds ISO 4406 cleanliness code 18/16/13.