Stihl MS 311 Product Instruction Manual - Page 45

Checking and Replacing the Chain Sprocket N Remove chain sprocket cover, saw chain and guide bar. N Release chain brake - pull hand guard against the front handle Fit new chain sprocket - 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 ensure reliable functioning of the chain brake. 001BA121 KN 001BA122 KN 5 62 1 4 3 62 1 N Use a screwdriver to remove the Eclip (1) N Remove the washer (2) N Remove rim sprocket (3) N Inspect transport profile on the clutch drum (4) - if there are also heavy signs of wear, also replace the clutch drum N Remove clutch drum or spur chain sprocket (5) including needle cage (6) from the crankshaft - with versions with two chain brake systems, press throttle lock beforehand 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 MS 311, MS 391 43