Stihl HT 56 C-E Product Instruction Manual - Page 34

689BA027 KN English The chain sprocket is driven via a friction clutch. Have the chain sprocket replaced by a servicing dealer. STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. 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. Carbide-tipped saw chains (Duro) are particularly wear resistant. STIHL recommends you have your chain resharpened by a STIHL servicing dealer. 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 an increased risk of kickback, with resulting risk of injury. The saw chain cannot be locked in place on the guide bar. Therefore, it is best to remove the chain from the bar and resharpen it on a workshop sharpening tool (FG 2, HOS, USG). Chain Pitch a The chain pitch (a) is marked on the depth gauge end of each cutter. Mark (a) 7 1 or 1/4 6, P or PM 2 or 325 3 or 3/8 Chain Pitch inch mm 1/4 P 6,35 1/4 6,35 3/8 P 9,32 0.325 8,25 3/8 9,32 Select file diameter according to chain pitch - see table "Sharpening Tools". You must observe certain angles when resharpening the chain cutter. Filing and side plate angles A B A Filing angle 689BA021 KN 32 HT 56 C