19Replacing the nylon cord (BUMP & FEED)WARNING: Make sure that the cover of the nylon cutting head is secured tothe housing properly as described below. Failure to properly securethe cover may cause the nylon cutting head to fly apart resulting inserious personal injury.Press inward on the housing latches and lift upward to remove the cover.Discard any of the remaining nylon cord.Hook the middle of the new nylon cord to the notch located at the center of thespool between the 2 channels provided for the nylon cord. One side of the cordshould be about 80 mm longer than the other side.Wind both ends firmly around the spool in the direction marked on the head forleft hand direction indicated by LH.CoverLatchesPress Press80 mmFor left handrotation SpoolCAUTION: The cutting tools shown in the illustration are not to be sharpened.Manual resharpening will result in imbalances of the cutting toolcausing vibrations and damage to the equipment.NOTE: To increase the service life of the cutter blade it may be turned overonce, until both cutting edges have become blunt.RESHARPENING THE CUTTING TOOLNYLON CUTTING HEADThe nylon cutting head is a dual line trimmer head that has bump & feedmechanism.The nylon cutting head will feed out the proper length of nylon line after tappingthe nylon cutting head on the ground by changes in centrifugal force caused byincreasing or decreasing rpms.OperationIncrease the nylon cutting head speed to approx. 6,000 min– -1.Bump the nylon cutting head lightly on the ground.The most effective cutting area is shown by the shaded area.–If the nylon cord does not feed out, rewind/replace the nylon cord by following–the procedures described under “Replacing the nylon cord.”Most effective cutting areaWind all but about 100 mm of the cords, leaving the ends temporarily hookedthrough a notch on the side of the spool.100 mmNotches