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6 Maintenance <br />6.5.2.2 Install the F-impeller <br />1. Prepare the shaft: <br />a) Polish off any flaws with a fine emery cloth. <br />The end of the shaft must be clean and free from burrs. <br />b) Coat the inner conic, the outer cylindrical surfaces, and the thread of the conical <br />sleeve with a thin layer of grease. <br />The proper lubrication is grease for bearings, for example Exxon Mobil Unirex N3, <br />Mobil Mobilith SHC 220 or equivalent. <br />NOTICE: <br />Surplus grease can cause the impeller to become loose. Remove surplus grease <br />from conical and/or cylindrical surfaces of shafts and/or sleeves. <br />2. Mount the impeller: <br />a) Fit the conical sleeve onto the shaft. <br />b) Fit one plain washer with a thickness of 2 mm (0.08 in), eight adjustment washers <br />with a thickness of 0.5 mm (0.02 in), and eight adjustment washers with a thickness <br />of 0.2 mm (0.0,08 in) onto the impeller. <br />c) Lubricate the impeller screw threads and contact surface. <br />Ensure that all parts are'clean. <br />d) Press the impeller onto the shaft with the impeller screw. <br />3. Fasten the impeller: <br />a) Prevent the impeller from rotating by inserting the rod through the pump housing <br />outlet. <br />b) Tighten the impeller screw. <br />If applicable; use the.rod. <br />Tightening torque: 65 Nm (48 ft•lb). <br />Tighten a further 1 /8 turn, 45' after tightening to the correct torque. <br />52 Flygt'3102 Installation, Operation, and Maintenance Manual <br />