Stihl MS 311 User Manual - Page 18
Clutch, Disassembling
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4. Clutch - Troubleshooting, b 3.1 - Remove the shroud, b 6.4. - Remove the clutch drum, b 4.1 1 1 4903RA005 TG 4903RA106 TG 1 : Pull boot (1) off the spark plug. - Unscrew the spark plug. 4903RA001 TG : The locking strip (1) 0000 893 5903 must butt against the cylinder wall (arrow) as shown. - Pull the clutch shoes off the carrier. : Remove the retainers (1). 1 4903RA006 TG 4903RA003 TG 1 : Push the locking strip (1) 0000 893 5903 into the spark plug hole, wide end first, so that "OBEN-TOP" faces up. 4903RA002 TG : Apply wrench to hexagon (arrow) and unscrew the clutch (1). Note that the clutch has a left-hand thread. Disassembling 1 2 - Clean all parts, b 14 - Replace any damaged parts. If the clutch is noticeably worn, replace all three clutch shoes at the same time - not individual shoes - since runout may otherwise affect correct operation of the clutch. 4903RA004 TG : Use hook (2) 5910 890 2800 to remove the clutch springs (1). MS 311, MS 391 17