Replacing The Chain Sprocket - Stihl 090 Instruction Manual / Owners Manual

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Replacing the chain sprocket
Remove chain sprocket cover and
cutting
attachment.
Loosen and remove spari< plug with combination wrench.
Screw locking screw from your tool set Into cylinder and
tum crankshaft clockwise until the piston rests against the
locking screw thus locking the crankshaft.
On 090/090 AV proceed as follows:
Loosen hexagonal nut with combination wrench.
Attentionl The hexagonal nut is of lell hand thread-
loosen clockwise!
Remove front washer, spacer ring, clutch, spiet-sleeve,
rear washer, chain sprocket and needle cage.
Clean needle cage in clean gasoline and grease with
roller bearing grease.
When replacing the chaln sprocket assembling is done in
reverse sequence. Thereby care has to be taken that the
rear washer with the arched Indent at Its outer diameter
is pointing towards the crankcase.
Tighten hex. nut with torque wrench at a torque ot 5.0 kpm
(36.2 Ibf. ft.).
On the 090 G the chain sprocket is held In place with pipe
plier; and the crankshaft nut is loosened by turning left:-
anticiockwlse. Remove washer underneath the nut and
pull off chain sprocket by means of special puller
1109 890 4401.
Top:
Inserted
locking saew
Center.
Loosening the crankshaft nut (090/090 AV)
Bottom: Sequence
of
component
parts (090/090 AV)
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