Stihl GS 461 Notice D'emploi page 23

20 Taking Care of the Guide Bar
20 Taking Care of the Guide
Bar
► Flip the guide bar – each time the chain is
changed – to avoid uneven wear, especially at
the sprocket nose and on the bottom
► Periodically clean the water inlet hole (1),
water outlet channel (2) and bar groove (3)
► Measure groove depth – using the measuring
tool on the file gauge (special accessory) – in
the area with the greatest wear
If the groove is not at least 6 mm deep:
► Replace guide bar
Otherwise the drive links will grind against the
base of the groove – tie straps will not lie against
the bar.
If the guide bar runs in the cut:
► Check guide bar for uneven wear (ridge offset)
► Flip the guide bar, if necessary remove the
bore of the guide bar with guide bar straight‐
ener
21 Checking and Replacing
the Chain Sprocket
► Remove chain sprocket cover, diamond abra‐
sive chain and guide bar
0458-761-8221-B
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21.1 Replacing rim sprocket
– If the diamond abrasive chain is being
replaced, also replace the rim sprocket
– If the wear marks (arrows) are deeper than
0.5 mm – otherwise the service life of the dia‐
mond abrasive chain is reduced – use check
gauge (special accessory) to test
Using two diamond abrasive chains in alternation
helps preserve the chain sprocket.
21.1.1 Removing rim sprocket
If only the rim sprocket is removed, the clutch
drum does not need to be removed.
3
► Remove cap (1)
► Remove rim sprocket (2)
► Inspect transport profile on the clutch drum (3)
– if there are also heavy signs of wear, also
replace the clutch drum (3)
21.1.2 Installing rim sprocket
► Fit rim sprocket (2)
► Fit cap (1)
English
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