Checking And Replacing The Chain Sprocket - Stihl MS 311 Manual De Instrucciones

Checking and Replacing
the Chain Sprocket
N Remove chain sprocket cover, saw
chain and guide bar.
N
Release chain brake – pull hand
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 ensure reliable functioning of the
chain brake.
MS 311, MS 391
5
6
2
1
4
3
6
N Use a screwdriver to remove the E-
clip (1)
N
Remove the washer (2)
N Remove rim sprocket (3)
N Inspect transport profile on the
clutch drum (4) – if there are also
heavy signs of wear, also replace
the clutch drum
N Remove clutch drum or spur chain
sprocket (5) including needle
cage (6) from the crankshaft – with
versions with two chain brake
systems, press throttle lock
beforehand
Install spur chain sprocket / rim
sprocket
N Clean crankshaft stub and needle
cage and lubricate with STIHL
lubricant (special accessory)
N
Slide needle cage onto the
crankshaft stub
N After refitting, turn the clutch drum
and/or spur chain sprocket approx.
1 full turn so that the carrier for the
oil pump drive engages
N Refit the rim sprocket – cavities
2
toward the outside
1
N Refit washer and E-clip on the
crankshaft
English
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