Stihl TS 420 Manual page 45

1
2
: Fit the screw sleeve (2) over the
thread of the conical crankshaft
stub (1) and screw it on.
– Turn the spindle screw (1) to
draw the drilled plate towards the
ignition-side half of the
crankcase.
: Fit the installing tool with three
M5x72 screws (arrows) through
the holes marked "21" on the
drilled plate and secure it to
prevent it twisting; turn the
spindle screw (1) in clockwise.
– Draw the ignition-side half of the
crankcase in as far as possible.
44
The crankshaft also turns when it is
drawn in with the installing tool. For
this reason, ensure that the small
end (arrow) always faces upwards
towards the cylinder.
– Remove the installing tool.
1
: Fit a new gasket (1) and secure it
with the guide sleeves (arrows).
Installing the clutch-side half of
the crankcase
Avoid damage to the crankshaft
stub.
Examine and clean the mating
surfaces of the clutch-side half of
the crankcase (including the
cylinder sealing surface). The
mating surfaces must not be
damaged in any way whatsoever.
: Turn the M5x72 screws (arrows)
in as far as possible – for
guidance and to prevent twisting.
1
– Coat the cylindrical crankshaft
stub with oil.
– Align the crankcase half with the
cylindrical crankshaft stub and
the two screws and position it
(arrows).
Wear protective gloves – risk of
burns.
– Heat the inner race of the ball
bearing to approx. 150 °C
(300 °F).
: Push the crankcase home until it
makes contact.
The crankcase must be fitted
rapidly, as the heat is transmitted to
the crankshaft stub and the inner
bearing race contracts.
TS 410, TS 420