Product Overview
The F11-005-MB-CN-K-000-0000-00 is the smallest displacement frame size in Parker’s (originally VOAC Hydraulics) F11 series of bent-axis fixed displacement axial piston pumps/motors, featuring a displacement of 4.9 cm³/rev and a weight of just 4.7 kg. Originating from the VOAC Volvo Hydraulics product line in Trollhättan, Sweden, the F11 series employs a 40° bent-axis design, laminated piston rings and timing gear synchronization, enabling bidirectional operation in both open and closed circuits with a reputation for high speed, high power density and compact construction.
The model code breaks down as follows: F11 identifies the series; 005 denotes the 4.9 cm³/rev displacement; MB is the mounting flange and shaft end configuration; CN denotes the main port configuration and shaft seal type (nitrile rubber low pressure); K is the port orientation and option code; 000-0000-00 is the standard option combination. The F11-005 is the smallest and fastest frame size in the F11 series, achieving a maximum intermittent speed of 14,000 rpm and maximum continuous speed of 12,800 rpm. This makes it irreplaceable in pump applications demanding extremely high speed and compact packaging.
Every F11-005 unit undergoes 100% simulated operating-condition bench testing prior to shipment, covering pressure cycling, speed stepping and thermal shock. Mounting flange, shaft end and port dimensions comply with CETOP/ISO/SAE standards and are identical to the original Parker/Volvo F11-005, ensuring true drop-in interchangeability with zero modification required.
Technical Specifications
F11 Series Frame Size Specifications:
F11-005 (This Model): Displacement 4.9 cm³/rev, max intermittent pressure 420 bar, max continuous pressure 350 bar, max intermittent speed 14,000 rpm, max continuous speed 12,800 rpm, max self-priming speed 5,000 rpm, theoretical torque at 100 bar 7.8 N·m, weight 4.7 kg
F11-006: Displacement 6.0 cm³/rev, max intermittent pressure 420 bar, max continuous pressure 350 bar, max intermittent speed 11,200 rpm, max continuous speed 10,200 rpm, theoretical torque at 100 bar 9.5 N·m, weight 6.5 kg
F11-010: Displacement 9.8 cm³/rev, max intermittent pressure 420 bar, max continuous pressure 350 bar, max intermittent speed 11,200 rpm, max continuous speed 10,200 rpm, theoretical torque at 100 bar 15.6 N·m, weight 6.5 kg
F11-012: Displacement 12.5 cm³/rev, max intermittent pressure 420 bar, max continuous pressure 350 bar, max intermittent speed 10,300 rpm, max continuous speed 9,400 rpm, theoretical torque at 100 bar 19.8 N·m, weight 7.5 kg
F11-014: Displacement 14.3 cm³/rev, max intermittent pressure 420 bar, max continuous pressure 350 bar, max intermittent speed 9,900 rpm, max continuous speed 9,000 rpm, theoretical torque at 100 bar 22.7 N·m, weight 7.5 kg
F11-019: Displacement 19.0 cm³/rev, max intermittent pressure 420 bar, max continuous pressure 350 bar, max intermittent speed 8,900 rpm, max continuous speed 8,100 rpm, theoretical torque at 100 bar 30.2 N·m, weight 11 kg
F11-005 Additional Specifications:
Model Code: F11-005-MB-CN-K-000-0000-00
Type: Bent-axis axial piston, fixed displacement
Function: Pump / motor dual-purpose (L counterclockwise or R clockwise)
Number of Pistons: 7
Theoretical Flow at Rated Speed: 20.8 l/min (5.5 gpm at 4,600 rpm)
Outlet Pressure: 5,000 psi (350 bar)
Max Drain Temperature: 115°C; min -40°C
Shaft Seal: Nitrile rubber (NBR) low pressure
Shaft: Metric keyed
Mounting Flange: CETOP flange
Origin: Made in Sweden
Key Technical Advantages
1. Ultra-High Speed Capability — 14,000 rpm Intermittent
The F11-005 achieves a maximum intermittent speed of 14,000 rpm and continuous speed of 12,800 rpm, the highest in the F11 series. This speed level leads the field among hydraulic pumps/motors of comparable displacement, making it ideal for high-speed cutting, saw drives and turbine test stands. Low piston weight and compact rotating group design are the engineering foundations enabling such high speeds.
2. 40° Bent-Axis Geometry with Laminated Piston Rings
The 40° bent-axis angle delivers a compact envelope at equivalent displacement with a weight of only 4.7 kg. Laminated piston rings provide excellent volumetric efficiency and thermal shock stability, minimizing internal leakage and maintaining stable volumetric efficiency under rapid pressure cycling. The small housing size and high power-to-weight ratio offer an ideal solution for space-constrained installations.
3. Timing Gear Synchronization and High Vibration Tolerance
The unique timing gear design synchronizes the drive shaft and cylinder barrel, enabling the F11-005 to withstand high G-forces and torsional vibration. Few moving parts and robust construction deliver high reliability and long service life. The motor produces high torque at startup and low speeds, with smooth low-speed operation free of stick-slip.
4. Heavy-Duty Roller Bearings
The output shaft is supported by heavy-duty roller bearings capable of handling substantial external axial and radial loads, extending bearing life and overall reliability.
5. 100% Simulated Load Testing & Drop-In Interchangeability
Each F11-005 unit is bench-tested under simulated operating conditions prior to dispatch. Mounting flange, shaft end and port dimensions comply with CETOP standards, matching the original Parker/Volvo F11-005 exactly, enabling direct replacement without any interface modification.
Application Areas
The F11-005 is deployed across demanding hydraulic applications in both open and closed loop circuits:
Forestry: saw drives, feller bunchers, skidders, forwarders
Industrial Cutting: high-speed saw drives, cutting machine drives, turbine test stands
Construction: skid steer loaders, aerial work platforms, fan drives
Marine: deck cranes, constant tension winches, hatch covers
Oil & Gas: nitrogen pumpers, frac trucks, coil tubing units
Mining & Drilling: drill head drives, dust collector drives
Industrial: shredders, industrial conveyors, dust collectors
Expert Maintenance Tips
1. Shaft Seal Replacement and Installation: The F11-005 uses a nitrile rubber low pressure shaft seal. When replacing the shaft seal, use the specified tooling and inspect the shaft sealing surface for corrosion and other damage. Be careful not to cut the seal on the shaft key or spline. For N-seal configurations, the chamfer of the back-up washer should face the seal when installed.
2. Oil Cleanliness and Viscosity Control: Maintain system oil cleanliness at ISO 4406 18/16/13 or better. As a high-speed pump, the F11-005 demands stricter viscosity control; VG 46 is recommended at 60°C operating temperature. Maximum drain temperature is 115°C and minimum is -40°C. Replace hydraulic oil and filter after the first 500 hours, then follow a 2,000-hour or annual replacement cycle.
3. Self-Priming Speed Limit: When used as a pump, the F11-005 has a maximum self-priming speed of 5,000 rpm. Exceeding this speed causes insufficient suction, cavitation and severe damage to the piston group and valve plate. Ensure the suction line diameter is sufficient, the suction filter is clean and inlet pressure remains within recommended limits.
4. Drain Line Management: The drain port must return to the reservoir independently—housing back pressure must not exceed 2 bar. The drain line end must remain submerged to prevent air ingestion. Fill the housing with clean hydraulic oil before first startup.
5. Pump/Motor Function Switching: The F11-005 can operate in either pump or motor mode. In pump applications, function L (counterclockwise) or R (clockwise) is typically used, with both rotation directions available. When switching function modes, verify that rotation direction matches system requirements and confirm the valve plate is installed in the correct orientation.
