Stihl 020 Oiling Repair Clutch, Sprocket, Oil Gear

Oiling issue and repair. Stihl 020 is a saw that i like very much... There is different versions and different cc acordingly. I do now have the whole picture here and now...but think there is a super version with little higher cc and is in professional segment. Not sure what i have here...due to the id plate inscription has fadet during the years. It might be a professional saw, but early enough to miss the safety hand brake mechanism. The clutch has also different patent...depends on.. So a 020 Stihl has some differences along the production line and years. I guess it was produced quite long time span. Ok Here i dive into the oiling mechanism and the construct on how the sprocket or drum with fixed sprocket...activate the gear that runs the other gear that runs the oil pump he he. Could be helpful for others is my hope. Ok Interesting saw that some say is good balanced and was very popular. I am lucky to have several...but do not have the top handle version.