Stihl FS 40, Service Manual

Page: 49 / 82

48 Series 4144 Components FC, FS, KM
:
Carefully separate the metering
diaphragm (2) and gasket (1).
The diaphragm material is
subjected to continuous alternating
stresses and eventually shows
signs of fatigue, i.e. the diaphragm
distorts and swells and has to be
replaced.
– Check the metering diaphragm
for signs of damage and wear
and replace if necessary.
– Install a new gasket.
:
Remove the flange (1).
:
Remove the cap (1).
296RA233 TG
1
2
545RA186 TG
1
545RA187 TG
1
:
Check the cap (1) and replace if
necessary
:
Line up the gasket (1) and
metering diaphragm (2) with the
holes (arrows).
– Place the gasket (1) and
metering diaphragm (2) in
position.
:
Position the cap (1) in the annular
groove (arrow).
– Fit the end cover.
296RA315 TG
1
545RA188 TG
1
2
545RA190 TG
1
– Place the flange in position
– stub (1) must be on same side
as throttle shutter.
:
Insert two screws (arrows) to hold
the flange, gasket and diaphragm
in position.
– Insert the other screws.
:
Insert the screws (arrows) and
tighten them down firmly in an
alternate pattern.
– Reassemble all other parts in the
reverse sequence.
– Check operation.
545RA191 TG
1
545RA192 TG
1