Replacing
the
chain
sprocket
On
machines with chain brake
The chain brake must be disengaged before the chain
sprocket cover can be removed - pull hand guard back
toward handlebar.
First remove chain sprocket cover and bar and chain.
Loosen and unscrew spark plug with combination wrench.
Put clutch wrench through the slots of the outer cover plate
between the clutch shoes. Turn crankshaft
in
such a way
that the boring provided
in
the handle of the clutch wrench
is
in
line with the bar stud and then insert the tube
1115
893
4200 through this boring onto the stud. Loosen crankshaft
nut with a ring wrench SW
19.
Attention! Crankshaft nut and carrier have left hand
thread
-loosen
in
clockwise direction!
After unscrewing the nut remove outer guide washer,
wrench and tube. Now screwlocking screw intothe cylinder
by hand until
it
has a snug fit. Turn crankshaft
in
clockwise
direction until the piston top rests against the locking nut,
loosen and unscrew carrier with clutch wrench.
Now the inner guide washer, chain sprocket, needle cage
and cover plate can be removed from the crankshaft.
Before reassembly clean
bull
end of crankshaft, wash
needle cage
in
clean gasoline and apply ball bearing
grease. Check drive pin
in
cover plate. If it is twisted insert
24 a new one; a worn out boring must be replaced.
Top: Loosening the hexagonal nut
Bottom: Tightening the carrier (standard clutch)
Reassembling is1lone
in
reverse sequencea/disassembly.
W,hen
pulling' on the chain sprocket care must be taken
that the drive pin engages into the boring of the chain
sprocket. The beaded edge at the cover plate and at inner
guide plate must point towards the crankcase, Tighten
carrier with clutch wrench. Mount outer cover plate
in
such a way that the elevated area of the inner diameter
points towards the carrier.
The crankshaft nut must be tightened down securely,
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