19MS 231, MS 231 C, MS 251, MS 251 C
4. Clutch
4.1 Clutch Drum
– Remove and install the clutch
drum, see instruction manual.
– Remove the needle cage.
– Clean the needle cage and
crankshaft stub, b 14
– Lubricate the needle cage and
crankshaft stub, b 14
– Inspect the clutch drum (1) for
signs of wear.
If there are signs of serious wear on
the inside diameter of the clutch
drum (1), check the remaining wall
thickness. If it is less than about
80% of the original thickness, install
a new clutch drum.
– Install the clutch drum.
4.2 Clutch
– Troubleshooting, b 4.2
– Remove the clutch drum, b 4.1
– Remove the shroud, b 6.4
!
80%
100%
5902RA018 TG
1
: Pull boot (1) off the spark plug.
– Unscrew the spark plug.
: Hold the locking strip (1)
0000 893 5904 so that the flat
side of its metal top faces the
piston and then push it into the
cylinder.
: The locking strip (1)
0000 893 5904 must butt against
the cylinder wall (arrow) and the
flat side of its metal top must rest
on the piston crown
– as shown in the illustration.
2310RA001 TG
1
2310RA002 TG
1
2310RA003 TG
1
: Apply wrench to hexagon (arrow)
and unscrew the clutch (1) – left-
hand thread.
Installing
Fit the cover washer (1) so that the
word "TOP" faces outwards.
: Position the clutch (2) on the
crankshaft stub so that the raised
hexagon (arrow) faces outwards.
: Fit the clutch (2) and tighten it
down firmly – left-hand thread.
– Remove the locking strip from the
cylinder.
– Reassemble all other parts in the
reverse sequence.
TOP
2310RA004 TG
1
TOP
2310RA005 TG
1
2
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