3 Parker HannifinPump and Motor DivisionTrollhättan, SwedenService ManualSeries F11Bulletin HY30-5503-M1/UKGeneral informationF11 is bent axis, fixed displacement heavy-duty motor/pump series. They can be usedin numerous applications in both open andclosed loop circuits.Series F11 is available in the followingframe sizes and versions:- F11-5, -6, -10, -12, -14 and -19 withCETOP mounting flange and shaft end.- F11-6, -10, -12 and -14 with ISO flangeand shaft- F11-6, -10. -12, -14 and -19 with SAEflange and shaftThanks to the unique spherical piston de-sign, F11 motors can be used at unusuallyhigh shaft speeds. Operating pressures to420 bar provides for the high output powercapability.The 40° angle between shaft and cylinderbarrel allows for a very compact, lightweightmotor/pump.The laminated piston ring offers importantadvantages such as low internal leakageand thermal shock resistance.The pump version has highly engineeredvalve plates for increased selfpriming speedand low noise, available with left and righthand rotation.The F11 motors produce very high torque atstart-up as well as at low speeds.Our unique timing gear design synchronizesshaft and cylinder barrel, making the F11very tolerant to high ’G’ forces and torsionalvibrations.Heavy duty roller bearings permit substan-tial external axial and radial shaft loads.The F11’s have a simple and straightfor-ward design with very few moving parts,making them very reliable motors/pumps.The unique piston locking, timing gear andbearing set-up as well as the limited num-ber of parts add up to a very robust designwith long service life and, above all, provenreliability.Note! F11-150 and -250 have been updated to F12-150 and -250. They can be found inthe service manual for F12. We also refer to after sales information, SI 09/01 and SI 09/04.