Idiomas disponibles
Idiomas disponibles
Checking and Replacing the
Chain Sprocket
Remove chain sprocket cover, saw
N
chain and guide bar.
Release chain brake – pull hand
N
guard against the front handle
Fit new chain sprocket
after use of two saw chains or
–
earlier
if the wear marks (arrows) are
–
deeper than 0.02 in (0.5 mm) –
otherwise the service life of the saw
chain is reduced – use check gauge
(special accessory) to test
Using two saw chains in alternation
helps preserve the chain sprocket.
Use only STIHL original chain sprockets
to help ensure reliable functioning of the
chain brake.
MS 250
5
6
2
1
4
3
6
Use a screwdriver to remove the E-
N
clip (1)
Remove the washer (2)
N
Remove rim sprocket (3) (if so
N
equipped), clutch drum (4) and
needle cage (6).
Inspect transport profile for rim
N
sprocket on the clutch drum (4) – if
there are also heavy signs of wear,
also replace the clutch drum
Remove clutch drum with integrated
N
spur chain sprocket (5) (if so
equipped) including needle cage (6)
from the crankshaft – for
powerheads with Quickstop Plus
chain brake system, depress
throttle trigger lockout beforehand
Install spur chain sprocket / rim sprocket
Clean crankshaft stub and needle
N
cage and lubricate with STIHL
lubricant (special accessory)
Slide needle cage onto the
N
crankshaft stub
After refitting, turn the clutch drum
N
and/or spur chain sprocket approx.
1 full turn so that the carrier for the
oil pump drive engages
Refit the rim sprocket – cavities
N
toward the outside
2
1
Refit washer and E-clip on the
N
crankshaft
English
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