Checking And Replacing The Chain Sprocket - Stihl MS 231 Notice D'emploi

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 0.5 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.
STIHL recommends use of original
STIHL chain sprockets in order to
ensure optimal functioning of the chain
brake.
MS 231, MS 231 C, MS 251, MS 251 C
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)
N
Inspect transport profile on the
N
clutch drum (4) – if there are also
heavy signs of wear, also replace
the clutch drum
Remove clutch drum or spur chain
N
sprocket (5) including needle
cage (6) from the crankshaft – with
QuickStop Super chain brake, press
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 – with
QuickStop Super chain brake, press
throttle trigger lockout beforehand
Refit the rim sprocket – cavities
N
toward the outside
Refit washer and E-clip on the
N
crankshaft
2
1
English
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