Stihl MSA 120 C Instruction Manual page 41

15 Assembling the Chain Saw
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► Position the saw chain in the groove of the guide bar,
starting at the tip.
► Make sure that the cutters in the groove on the top side of
the guide bar face the tip of the bar. STIHL saw chains are
manufactured with arrows on the tie straps to help the
operator determine the proper direction of the chain.
Arrows on the tie straps on the top of the bar must point
toward the bar tip.
► Turn the tensioning gear clockwise until it stops.
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► Point the guide bar tip away from the chain sprocket (2),
with the teeth of the tensioning gear (4) facing away from
the motor.
► Place the saw chain around the chain sprocket.
► Slide the guide bar over the collar screw (3). The head of
the collar screw must protrude into the oblong hole.
0458-716-8621-C
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► Disengage the chain brake, @ 16.2.
► Direct the drive links into the groove of the guide bar
(arrow) while turning the tensioning gear (4)
counterclockwise until it stops.
The guide bar and saw chain must be firmly and securely
mounted on the chain saw.
► Fit the sprocket cover on the chain saw so that it is flush
with the housing.
► When fitting the chain sprocket cover, the teeth of the
adjusting wheel and the tensioning gear must mesh.
► If necessary, turn the adjusting wheel slightly until the
chain sprocket cover sits flush against the housing.
► Turn the wingnut clockwise until the chain sprocket cover
is firmly attached to the chain saw.
► Close the handle of the wingnut.
15.2.2 Removing the Guide Bar and Saw Chain
► Raise the handle of the wingnut to open and then turn the
wingnut counterclockwise until the chain sprocket cover
can be removed.
► Remove the chain sprocket cover.
► Turn the tensioning gear counterclockwise until it stops
and the saw chain is loose.
► Remove the guide bar, including the tensioning gear and
saw chain.
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