Stihl OILOMATIC Manual page 54

Condition
Peened or chipped front corners on
all cutters and tie straps.
Cause
a) Chain sprocket is too small.
b) Chain tension too loose.
c) Bar groove is too wide at the point
of chain entry.
n all cases the chain hits the bar
groove entry area.
Remedy
a) Install a chain sprocket which
matches the guide bar.
b) Tension chain properly.
c) Replace the guide bar.
Note
If this damage has caused chain
joints to become stiff, install a new
chain.
Chain and Bar Manual
Condition
Notch peened on all cutters and tie
straps, also accompanied by
excessive burrs on bottoms of these
chain links, and on bar rails.
Cause
a) Chain knocks and vibrates as a
result of too loosely tensioned chain
or unevenly sharpened cutters
(angles, lengths).
b) New chain has been run on either
a worn sprocket with deep scores or
one of the wrong pitch
Remedy
a) Sharpen and tension chain
correctly.
b) Install new chain, chain sprocket
and guide bar.
Condition
Cracks in center of several tie
straps opposite cutters.
Cause
Chain has been run on a worn spur
sprocket. Insufficient chain tension.
Remedy
This chain is unserviceable; install a
new chain, chain sprocket and
guide bar. If only one of these parts
is replaced, it will be quickly worn
again by the other defective parts.
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