Stihl 009 Instruction Manual - Page 46

: Hold the file horizontally for all chain types (at right angle to side of guide bar) and file according to the angles marked on the filing tool. : Avoid touching the tie straps and drive links with the file. : Rotate the file at regular intervals while filing to avoid one-sided wear. : Use a piece of hardwood to remove burrs from cutting edge. : Check angles with the filing gauge. All cutters must be the same length. If the cutters are not the same length, they will have different heights. This makes the chain run roughly and can cause it to break. Find the shortest cutter and then file all other cutters back to the same length. This can be very time consuming - it is best to have it done in the workshop on an electric grinder. a Depth gauge setting The depth gauge determines the height at which the cutter enters the wood and thus the thickness of the chip removed. Specificed distance or setting between depth gauge and cutting edge = a: This setting may be increased by 0.2mm (0.008") for cutting softwood in mild weather season - no frost. Chain pitch Inch 1/4 3/8 PMN 3/8 PM 0.325 3/8 0.404 (mm) (6.35) (9.32) (9.32) (8.25) (9.32) (10.26) Depth gauge setting "a" mm (Inch) 0.65 (0.026) 0.45 (0.018) 0.65 (0.026) 0.65 (0.026) 0.65 (0.026) 0.80 (0.031) 689BA023 KN 689BA024 KN Lowering depth gauges The depth gauge setting is reduced when the chain is sharpened. Use filing gauge to check the setting every time you sharpen the chain and, if necessary, lower the depth gauge with a flat or triangular file so that it is level with the filing gauge. Round off depth gauges parallel to the stamped marking. After sharpening Clean the chain thoroughly, remove filings or grinding dust - lubricate the chain by immersing it in an oil bath. Before long out-of-service period Clean the chain with a brush and immerse it in an oil bath. 44