11Turn the machine upside down, and you can replace the cutter blade or thenylon cutting head easily.– Insert the hex wrench through the hole in the gear case and rotate thereceiver washer (3) until it is locked with the hex wrench.– Loosen the nut (1) (left-hand thread) with the socket wrench and removethe nut (1), and clamp washer (2).With the hex wrench still in place.– Mount the cutter blade onto the shaft so that the guide of the receiverwasher (3) fits in the arbor hole in the cutter blade. Install the clamp washer(2) and secure the cutter blade with the nut (1).[Tightening torque: 13 - 23 N-m]NOTE: Always wear gloves when handling the cutter blade.NOTE: The cutter blade-fastening nut (with spring washer) is a consumablepart. If there appears any wear or deformation on the spring washer,replace the nut.NOTE: The clamp washer (2), and nut (1) are not necessary for mounting thenylon cutting head. The nylon head should go on top of the receiverwasher (3).– Screw the nylon cutting head onto the shaft.– Make sure that the blade is the left way up. RotationMOUNTING OF CUTTER BLADE OR NYLON CUTTING HEADHex wrenchLoosenTightenHex wrenchLoosen Tighten