Makita RBC420 Original Instruction Manual

Contents

19Nylon cutting headThe nylon cutting head is a dual string trimmer head capable of both automatic andbump & feed mechanisms.The nylon cutting head will automatically feed out the proper length of nylon cord bythe changes in centrifugal force caused by increasing or decreasing rpms. However,to cut soft grass more efficiently, bump the nylon cutting head against the ground tofeed out extra cord as indicated under operation section.Operation- Increase the nylon cutting head speed to approx. 6,000 rpm. Low speed (under4,800 rpm) is not suitable, the nylon cord will not feed out properly at low speed.- The most effective cutting area is shown by the shaded area.If the nylon cord does not feed out automatically, proceed as follows:1. Release the throttle lever to run the engine idle and then squeeze the throttlelever fully. Repeat this procedure until the nylon cord feeds out to the properlength.2. If the nylon cord is too short to feed out automatically with the above procedure,bump the knob of the nylon cutting head against the ground to feed out thenylon cord.3. If the nylon cord does not feed out with procedure 2, rewind/replace the nyloncord by following the procedures described under “Replacing the nylon cord”.Replacing the nylon cord1. Put off cover from housing, pressing two cover locking tabs located oppositelyon side of the housing.2. Take off tap knob and spool from the housing.3. Put each one end of two cutting lines into each holes at inner most of the slot onone of spool outer flanges. Put the lines into spool gutters through each slit onthe flanges.Most effective cutting areaIdle speed Full speedTap knobPull upCoverLocking TabHousing WindowTab knob SpoolThere is a hole innermost of the slit.Slit