Stihl MSA 120 C Instruction Manual page 67

7 Assembling the Saw
► Place the guide bar (6) on the tensioning gear (4) so that
both pegs on the tensioning gear (4) engage the holes in
the guide bar.
The guide bar (6) may be either way round. The logo on the
guide bar may also be upside down.
► Insert and tighten down the screw (5).
4
► Fit the chain in the bar groove so that the arrows on the tie
straps on top of the bar point in the direction of rotation.
► Turn the tensioning gear (4) clockwise as far as stop.
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3
► Fit the guide bar with tensioning gear and chain on the
saw and check the following points:
– The tensioning gear (4) faces the user.
– Chain drive links are seated in teeth of chain sprocket
(2).
– Head of screw (3) locates in slot in guide bar (6).
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► Disengage the chain brake.
► Rotate the tensioning gear (4) counterclockwise until the
chain fits snugly against the bar. Make sure the drive link
tangs engage the bar groove.
The guide bar and chain are positioned against the saw.
► Fit the sprocket cover so that it is flush with the saw.
► If the sprocket cover is not flush with the saw: Turn the
adjusting wheel slightly and refit the sprocket cover.
The teeth of the adjusting wheel and tensioning gear must
mesh.
► Rotate the wingnut clockwise until the chain sprocket
cover is firmly seated.
► Fold down the grip of the wingnut.
7.1.2 Removing the bar and chain
► Raise the grip of the wingnut.
► Rotate the wingnut counterclockwise until the chain
sprocket cover can be removed.
► Remove the sprocket cover.
► Turn the tensioning gear (4) clockwise as far as stop.
The chain is now slack.
► Removing the bar and chain
► Take out the screw in the tensioning gear.
► Remove the tensioning gear.
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