Oregon Chain Saw - Page 97

93
Drive Sprockets
SPROCKET TROUBLESHOOTING (CONTINUED)
 40  41
Cracks or breakage on the clutch Obvious wear or discoloration
drum. Remedy: See BB. around the outer circumference
of the drum skirt. Remedy: See CC.
 42
Excessive wear on the inside surface of the drum skirt. Remedy: See DD.
REMEDIES: (Z-DD)
Z. Such outer surface wear is normal over time. Replace
rim sprockets and spur sprockets when wear is 1/64”
deep. Never run chain on severely worn sprockets.
Severely worn sprockets could break during opera-
tion. This remedy applies to picture
 38 .
AA.Such wear indicates that chain drive links are bot-
toming out on the adapter’s splines. Replace the
clutch drum. Replace the rim sprocket. This remedy
applies to picture
 39 .
BB. Do not attempt to repair cracked or broken clutch
drums. Replace the drum. This remedy applies to
picture
 40 .
CC. Replace the drum. Have your chainsaw dealer
adjust the chain-brake strap. This remedy applies to
picture
 41 .
DD.Replace the drum. Have your chainsaw dealer
service the saw’s clutch. This remedy applies to
picture
 42 .
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