Cutting Attachment; Mounting The Bar And Chain - Stihl MS 391 Safety Manual

English

Cutting Attachment

STIHL is the only manufacturer in the
industry to produce its own chain saws,
guide bars, saw chains and chain
sprockets.
A cutting attachment consists of the saw
chain, guide bar and chain sprocket.
The cutting attachment that comes
standard is designed to exactly match
the chain saw.
1
a
t = a : 2
– The pitch (t) of the saw chain (1),
chain sprocket and the nose
sprocket of the Rollomatic guide bar
must match.
– The drive link gauge (2) of the saw
chain (1) must match the groove
width of the guide bar (3).
If non-matching components are used,
the cutting attachment may be damaged
beyond repair after a short period of
operation.
14
Mounting the Bar and
Chain
Removing the chain sprocket cover
N
Unscrew the nuts and take off the
2
chain sprocket cover.
3
2
N
Turn the screw (1)
counterclockwise until the tensioner
slide (2) butts against the left end of
the housing slot.
Disengaging the chain brake.
N
Fitting the chain
1
N
Pull the hand guarad towards the
front handle until there is an audible
click – the chain brake is
disengaged.
Wear work gloves to protect your
hands from the sharp cutters.
Fit the chain – start at the bar nose.
MS 311, MS 391