Stihl FS 490 C-M Instruction Manual - Page 43

Sharpening Metal Cutting Blades N Use a sharpening file (see "Special Accessories") to sharpen dull cutting attachments. In case of more serious wear or nicks: Resharpen with a grinder or have the work done by a dealer - STIHL recommends a STIHL servicing dealer. N Sharpen frequently, take away as little metal as possible - two or three strokes of the file are usually enough. 1 2 1 1 2 2 N Resharpen the teeth (1) uniformly - do not alter the contour of the parent blade (2) in any way. See cutting attachment packaging for additional sharpening instructions. Keep the packaging for future reference. 002BA042 KN 002BA406 KN Balancing N After resharpening about 5 times, check the cutting attachment for out-of-balance on a STIHL balancer - see "Special Accessories" - or have it checked by a dealer and rebalanced as necessary - STIHL recommends a STIHL servicing dealer. English Maintaining the Mowing Head Placing power tool on the ground N Shut off the engine. N Lay your power tool on its back so that the cutting attachment mounting face is pointing up. Replacing Nylon Line Always check the mowing head for signs of wear before replacing the nylon line. WARNING If there are signs of serious wear, replace the complete mowing head. The nylon mowing line is referred to as "nylon line" or "line" in the following. The mowing head is supplied with illustrated instructions for replacing the nylon line. Keep the instructions for the mowing head in a safe place. N If necessary, remove the mowing head. FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L 41