Stihl MS 880 R MAGNUM Product Instruction Manual - Page 46
Maintaining and, Sharpening the Saw Chain
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English Install spur chain sprocket / rim sprocket N Clean crankshaft stub and needle cage and lubricate with STIHL lubricant (special accessory) N Slide needle cage onto the crankshaft stub N After refitting, turn the clutch drum and/or spur chain sprocket approx. 1 full turn so that the carrier for the oil pump drive engages N Refit the rim sprocket - cavities toward the outside N Refit washer and E-clip on the crankshaft Maintaining and Sharpening the Saw Chain Cutting effortlessly with a correctly sharpened chain A properly sharpened chain slices through wood effortlessly and requires very little feed pressure. Do not work with a dull or damaged chain as it will increase the physical effort required, produce unsatisfactory results and a higher rate of wear. N Clean the chain. N Check the chain for cracks in the links and damaged rivets. N Replace any damaged or worn parts of the chain and match the new parts to the shape and size of the original parts. It is absolutely essential to comply with the angles and dimensions specified below. If the saw chain is incorrectly sharpened - and in particular if the depth gauge is set too low - there is a risk of increased kickback of the saw, with resulting risk of injury. 3/8 Use only special saw chain sharpening files. Other files have the wrong shape and cut. Select file diameter according to chain pitch - see table "Sharpening Tools". You must observe certain angles when resharpening the chain cutter. A 689BA021 KN B A Sharpening angle B Side plate angle Chain type Rapid Micro (RM) Rapid Super (RS) Picco Micro (PM) Angle (°) AB 30 75 30 60 30 75 Cutter shapes Micro = Semi-chisel Super = Full chisel The specified angles A and B are obtained automatically if the recommended files or sharpening tools and correct settings are used. The angles must be the same on all cutters. If the angles are uneven: Chain will run roughly, not in a straight line, wear quickly and finally break. 689BA020 KN The chain pitch (e.g. 3/8") is marked on the depth gauge end of each cutter. 44 MS 880
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