12MOUNTING OF CUTTER BLADE OR NYLON CUTTING HEADTurn the machine upside down, and you can replace the cutter blade or nyloncutting head easily.– Insert the hex wrench through the hole in the gear case and rotate thereceiver washer (4) until it is locked with the hex wrench.– Loosen the nut (1) (left-hand thread) with the socket wrench and remove thenut (1), cup (2), and clamp washer (3).Hex wrenchMounting of cutterblade with the hex wrench still in placeCAUTION: Always use shoulder strap when using metal blade.– Mount the cutter blade onto the shaft so that the guide of the receiver washer(4) fits in the arbor hole in the cutter blade. Install the clamp washer (3), cup(2), and secure the cutter blade with the nut (1).[Tightening torque: 13 - 23 N-m]CAUTION: 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.Mounting of nylon cutting head– The clamp washer (3), cup (2), and nut (1) are not necessary for mountingthe nylon cutting head. The nylon cutting head should go on top of thereceiver washer (4).– Insert the hex wrench through the hole in the gear case and rotate thereceiver washer (4) until it is locked with the hex wrench.– Then screw the nylon cutting head onto the shaft by turning it counter-clockwise.– Remove the hex wrench.(3)(2)(1)Hex wrenchLoosenLoosenTightenTightenHex wrenchHex wrench(4)(4)Rotation– Make sure that the blade is the left way up.