Safety Manual

MS 251, MS 251 C
English
28
Removing the chain sprocket cover
N Unscrew the nut and remove the
chain sprocket cover.
N Turn the screw (1)
counterclockwise until the tensioner
slide (2) butts against the left end of
the housing slot.
Disengage the chain brake.
N Pull the hand guard towards the
front handle until there is an audible
click – the chain brake is
disengaged.
Fitting the chain
WARNING
Wear work gloves to protect your hands
from the sharp cutters.
N Fit the chain – start at the bar nose.
N Fit the guide bar over the studs (1) –
the cutting edges on the top of the
bar must point to the right.
N Engage the peg of the tensioner
slide in the locating hole (2) –- place
the chain over the sprocket (3) at
the same time.
N Turn the tensioning screw (4)
clockwise until there is very little
chain sag on the underside of the
bar – and the drive link tangs are
engaged in the bar groove.
N Refit the sprocket cover and screw
on the nut only fingertight.
N Go to chapter on "Tensioning the
Saw Chain"
Mounting the Bar and Chain
(side chain tensioner)
533BA001 KN
1
2
001BA185 KN
001BA186 KN
143BA003 KN
3
1
1
2
4
001BA187 KN