Stihl FS 90 R Product Instruction Manual - Page 45
Sharpening Metal Cutting, Blades
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Sharpening Metal Cutting Blades N Use a sharpening file (special accessory) 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 Resharpen frequently, take away as little material as possible: two or three strokes of the file are usually enough. Balancing N After resharpening about 5 times, check the cutting attachment for out-of-balance on a STIHL balancer (special accessory) or have it checked by a dealer and rebalanced as necessary - STIHL recommends a STIHL servicing dealer. 1 2 1 1 2 2 002BA042 KN N Resharpen the cutters (1) uniformly - do not alter the contour or the parent blade (2) in any way. See cutting attachment packaging for additional sharpening instructions. FS 90, FS 90 R English 43
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