Troubleshooting - Oregon CHAINSAW Maintenance And Safety Manual

REMEDIES: (Z-DD)
Z. Such outer surface wear is normal over time. Replace rim sprockets
and spur sprockets when wear is 1/64" (0,4mm) deep. Never run
chain on severely worn sprockets. Severely worn sprockets could
break during operation. (picture 40)
AA. Such wear indicates that chain drive links are bottoming out on
the adaptator's splines. Replace the clutch drum. Replace the rim
sprocket. (picture 41)
BB. Do not attempt to repair cracked or broken clutch drums. Replace
the drum. (picture 42)
CC. Replace the drum. Have your chainsaw dealer adjust the chain-
brake strap. (picture 43)
DD. Replace the drum. Have your chainsaw dealer service the saw's
clutch. (pictures 44)
70.
DRIVE SPROCKETS
SPROCKET TROUBLESHOOTING
USEFUL INFORMATION DRIVE SPROCKETS