Repair; Disassembly; And Assembly Of Clutch - Stihl 009 User Manual

STIHL 009, 010, 011
2.3

Repair

2.3.1 Disassembly and
Assembly of Clutch
Top:
Locking screw 1107 191 1200
Bottom:
Locking screw in position
First remove the chain sprocket cover
and the cutting attachment. On Quick-
stop models it is necessary to dis-
engage the chain brake so that the
brake band releases the clutch drum.
Take out the spark plug and fit the
locking screw in its place. Use the
special wrench to turn the clutch and
the crankshaft clockwise until the
piston head butts against the locking
screw. Now use wrench to unscrew
the clutch.
Top:
Wrench 1113 890 3600
Bottom:
Unscrewing the clutch
Caution: The clutch has a lefthand
thread - unscrew it clockwise!
After unscrewing the clutch, remove the
chain sprocket, needle cage and thrust
washer from the crankshaft. Examine
clutch for signs of cracks or breaks.
If hairline cracks are found in the
sprung part of the clutch, fit a new
clutch. The cranked U-plate should
also be inspected for hairline cracks.
If any are found, fit a new Cranked
U-plate. Wash needle cage, thrust
Counterbored side of clutch
washer and stub of crankshaft with
clean gasoline. Replace needle cage
if it is faulty.
Lubricate needle cage, thrust washer
and stub of crankshaft with
antifriction bearing grease before
assembly. When refitting the clutch
make sure that the side on which the
thread is counterbored to a depth of
about 2 mm (0.08 in) faces the
crankcase. Tighten down clutch
with the wrench to a torque load of
30 Nm (3.0 kpm).
9