Drive Sprocket Care; Troubleshooting Chain Wear - Stihl OILOMATIC saw chain Manual

Drive Sprocket Care

Drive sprockets must always match the chain
which is being used. A servicing dealer is best
equipped to match and replace corresponding chains
and sprockets.
If the wear marks on the
sprocket are significantly more
than .02 inch or .5 mm, you
should replace the sprocket.
Never install a new chain on
a worn sprocket. A well-cared-
for sprocket will usually last
through two chains.
TIP:
A general rule of thumb is to
replace one sprocket for every
two chains, one bar for every
two sprockets and every four
chains (4=2=1).
4 chains
2 sprockets
1 bar
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Appearance
Excessive wear
on teeth.

Troubleshooting Chain Wear

Following are some of the most common problems.
Condition:
Damaged top and/or side on cutter. Chain won't cut
straight.
Cause:
Cutter has hit material other than wood.
Remedy:
File cutter to remove the damage. File other cutters to
same size.
Condition:
Cutter angle blunt on top edge or sloping back on side
edge. Chain must be forced to cut.
Cause:
File too large or held too high.
Remedy:
File to correct angle with proper file.
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