Av Handle System; Repair - Stihl 064 Service Manual

STIHL 064, 066

AV HANDLE SYSTEM

7.
7.1

Repair

Annular buffers and plugs at
clutch side
The crankcase and tank housing
are connected by vibration damp-
ing rubber buffers. Damaged rub-
ber buffers (annular buffers) must
always be replaced.
Annular buffers must be replaced
in sets of the same hardness
(three degrees of hardness are
available).
Harder buffers are installed for
more accurate control but reduced
vibration damping, while the softer
buffers offer better vibration damp-
ing.
Removing annular buffers at
clutch side:
- Remove chain sprocket cover,
chain and bar.
- Take out the pan head screw and
lift away the inner side plate.
- Pry out the plugs with a screw-
driver.
- Unscrew the annular buffer
mounting screws.
- Use a screwdriver to pry the an-
nular buffers out of their seats.
Annular buffers and plugs at
ignition side
Note: It is necessary to remove
the tank housing, see 11.10, for
access to the upper annular buffer.
Remove the upper annular buffer
at the ignition side as follows:
- Remove the carburetor box cover.
- Remove the air filter from the
filter base.
- Pull off the spark plug terminal.
- Remove the shroud.
- Remove fan housing.
- Pry out the plug with a screw-
driver.
- Take out the mounting screw.
- Use a screwdriver to pry the
annular buffer out of its seat.
No disassembly work is required
to remove the lower annular buffer
at the ignition side.
- Pry out the plug with a screw-
driver.
- Take out the mounting screw.
Rubber buffer on inboard side
of crankcase
- Use a screwdriver to pry the
annular buffer out of its seat.
Note: It is necessary to remove
the tank housing, see 11.10, for
access to the rubber buffer on the
inboard side of the crankcase.
Installing new annular buffers:
- Position annular buffer, washer
first, in crankcase seat.
- Insert the mounting screw and
tighten it down firmly.
- Push the plug into the annular
buffer.
Note: Coat front bead on plug with
a little oil to ease installation.
Assembly is now a reversal of the
disassembly sequence.
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