Lubrication system 4. If the rotor nut is difficult to get loose, turn the rotor upside down and fasten the rotor nut in a vice. Turn the rotor anti-clockwise 1.5 turns by hand or use an M20 nut, see il- lustration. M20 IMPORTANT! x 1.5 The rotor must not be put in a vice. Never strike the rotor cover. This may cause damage resulting in imbalance. 133 316 5. Remove the rotor cover by holding the rotor in both hands and tapping the rotor nut against the table. Never strike the rotor di- rectly as this may damage its bearings. 133 317 OPM 300 en-GB 40 © Scania CV AB 2015, Sweden