Guide Bars - Stihl OILOMATIC Manual

6.2

Guide Bars

A B
Appearance
A) Evenly worn bar rails – minimum
depth has been reached.
B) Unevenly worn bar rails.
Condition
B) Chain tips to one side and does
not cut straight.
Cause
A) Normal wear.
B) Incorrectly sharpened chain.
Remedy
A) Install new chain sprocket, guide
bar and chain. If only one of these
parts is replaced, it will be quickly
worn again by the other defective
parts.
B) Level the bar rails and sharpen
the chain properly.
If minimum groove depth cannot be
maintained, replace the cutting
attachment.
Chain and Bar Manual
Appearance
Splayed bar rails (groove spread).
Condition
Chain wobbles in the bar groove
and does not cut straight. Bottoms
of cutters and tie straps wear
quickly.
Cause
Force has been used, e.g. during
wedging.
Remedy
Replace the guide bar.
Appearance
Pinched bar groove.
Condition
Chain jams.
Cause
Force has been used, e.g. when
cutting attachment is pinched in the
cut.
Remedy
Open up the bar groove and
examine the whole bar for any signs
of cracks, especially at the point of
deformation. If any cracks are
found, replace the guide bar.
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