Stihl FS 94 Instruction Manual page 34

Ignition side of crankcase
: Use a punch to carefully drive out
the oil seal.
– Check and clean the crankcase
or replace if necessary.
– If this half of the crankcase is in
order, install a new ball bearing.
– Heat area of bearing seat to
about 160°C (320°F).
The bearing drops out as soon as
this temperature is reached.
Installing
The ball bearing must not be press-
fitted in the cold condition.
1
– Heat area of bearing seat to
about 160°C (320°F).
This operation must be carried out
quickly because the bearing
absorbs heat and begins to expand.
Series 4149 Powerhead
: Push the ball bearing (1) home
as far as stop.
– Check that the bearing is properly
seated. If necessary, use
press arbor 4224 893 7200 to
press the bearing fully home.
Starter side of crankcase
: Use a punch to carefully drive out
the oil seal.
– Check and clean the crankcase
or replace if necessary.
– If this half of the crankcase is in
order, install a new ball bearing.
– Heat area of bearing seat to
about 160°C (320°F).
The bearing drops out as soon as
this temperature is reached.
Installing
The ball bearing must not be press-
fitted in the cold condition.
1
– Heat area of bearing seat to
about 160°C (320°F).
This operation must be carried out
quickly because the bearing
absorbs heat and begins to expand.
: Push the ball bearing (1) home
as far as stop.
– Check that the bearing is properly
seated. If necessary, use
press arbor 4116 893 7205 to
press the bearing fully home.
– Install the crankshaft, b 5.6
– Install the oil seals,
b 5.3
The tapered crankshaft stub must
be free from grease.
– Reassemble all other parts in the
reverse sequence.
33