Stihl MS 441 C-M MAGNUM174 Product Instruction Manual - Page 48

English Checking and Replacing the Chain Sprocket 5 N Remove chain sprocket cover, saw chain and guide bar. N Release chain brake - pull hand guard against the front handle 62 1 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 Fit new chain sprocket 4 3 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 62 1 N Refit the rim sprocket - cavities toward the outside N Refit washer and E-clip on the crankshaft 001BA121 KN 001BA122 KN - after use of two saw chains or earlier - if the wear marks (arrows) are deeper than 0.02 in (0.5 mm) - otherwise the service life of the saw chain is reduced - use check gauge (special accessory) to test Using two saw chains in alternation helps preserve the chain sprocket. Use only STIHL original chain sprockets to help ensure reliable functioning of the chain brake. N Use a screwdriver to remove the Eclip (1) N Remove the washer (2) N Remove rim sprocket (3) (if so equipped), clutch drum (4) and needle cage (6). N Inspect transport profile for rim sprocket on the clutch drum (4) - if there are also heavy signs of wear, also replace the clutch drum N Remove clutch drum with integrated spur chain sprocket (5) (if so equipped) including needle cage (6) from the crankshaft - for powerheads with Quickstop Plus chain brake system, depress throttle trigger lockout beforehand 46 MS 441 C-M