Stihl Chain Saw - Fuel and Refueling

Guide Bar Care
Guide Bars
In General:
Guide bars wear down
faster where most of the cutting
is done – on the underside of
the bar. You should check there
often for bent or worn guide
rails and cracked, burred edges.
Badly damaged bars must be
replaced. With proper
lubrication and light filing, you
can prevent most damage and
make the bar last longer.
Instructions:
Clean the bar grooves often.
Whenever you remove the
bar, turn it over so that it will
wear down evenly.
Check the groove depth
after a bar has been used for a
while. Old guide bar rails wear
down and the groove can
become too shallow for drive
links to pass through without
scraping. On solid nose bars,
measure the groove depth
where the heaviest cutting is
done. On sprocket nose bars,
measure the depth at the nose.
If the depth is less than it should
be, the nose should be
replaced.
Appearance
a) Evenly worn bar
rails - minimum depth
has been reached.
b) Unevenly worn bar
rails.
Appearance
Splayed bar rails
(groove spread).
Appearance
Pinched bar groove.
1110
Filing depth gauges. Check the depth gauge for the
correct height every time you sharpen the cutters.
If the depth gauge sticks up above the filing gauge,
first file it level with a flat file. Then make sure that all the
other depth gauges are filed to the same height. Finally,
slightly file each leading edge to round the corner back
to its original shape.
Use a depth gauge tool for accurate measurement and filing.
These tools, to fit different gauges of saw chain, are available
from your STIHL dealer.
ab