Stihl MSA 220.0 T Instruction Manual page 28

English
► Place the chain around the chain sprocket.
► Slide the guide bar (8) over the collar
screw (6). The head of the collar screw must
protrude into the oblong hole.
► Fit the pin of the tensioning gear in the hole (7)
of the guide bar.
► Disengage the chain brake,
► Direct the drive links into the groove of the
guide bar (arrow) while turning the side chain
tensioner (3) clockwise until it stops.
The guide bar and chain must be firmly and
securely mounted on the chain saw.
► Fit the sprocket cover on the saw so that it is
flush with the housing.
► Turn the nut clockwise until the chain sprocket
cover is firmly attached to the saw.
15.2.2 Removing the Guide Bar and Chain
► Unscrew the nut securing the chain sprocket
cover.
► Remove the chain sprocket cover.
► Turn the side chain tensioner counterclock‐
wise until it stops and the chain is loose.
► Remove the guide bar and chain.
NOTICE
■ The top and bottom of the guide bar are sym‐
metrical, and the bar may be mounted with the
printing facing up or down. Flipping the guide
bar each time the chain is sharpened or
changed will help reduce uneven wear and
improve its service life.
15.3 Tensioning the Chain
WARNING
■ To reduce the risk of severe personal injury
from chain derailment, check chain tension
frequently, 5.5. At operating temperatures,
the chain stretches and sags. New chain tends
to stretch more than used chain. Tension the
chain so that the drive links cannot come out
of the groove on the underside of the guide
bar.
28
16.2.
3
15 Assembling the Chain Saw
To properly tension the chain:
► Switch off the chain saw,
► Engage the chain brake,
► Remove the battery,
2
1
► Loosen the nut (2).
► Disengage the chain brake,
► Lift the guide bar tip.
► Turn the side chain tensioner (1) clockwise to
tighten the chain.
The chain is properly adjusted when the dis‐
tance (a) between the underside of the guide
bar and the chain is within 0.04 in. (1 mm) and
0.08 in. (2 mm) and can still be pulled easily
along the bar by hand. Always wear gloves
when handling the chain.
► If the chain cannot be moved along the guide
bar, it is too tight.
– Reduce the tension by turning the side
chain tensioner counterclockwise until the
chain can move freely along the guide bar.
– Ensure that the drive links remain in the
groove and that the distance (a) between
the underside of the guide bar and the chain
is within 0.04 in. (1 mm) and 0.08 in.
(2 mm).
► Once the chain is properly tensioned, lift the
guide bar tip and tighten the nut to secure the
chain sprocket cover.
► Finally, ensure that the distance a between the
underside of the guide bar and the chain is
within 0.04 in. (1 mm) and 0.08 in. (2 mm).
NOTICE
■ Always release tension on the chain after fin‐
ishing work. The chain contracts as it cools
down. If it is not slackened, it can damage the
drive shaft and bearings. Properly re-tension
the chain before using the saw again.
18.2.
16.1.
17.2.
a
16.2.
0458-007-8201-B