Installation - Stihl MS 441 Manual

: Position flange (2) of assembly
tool 5910 893 2101 against
crankcase half on ignition side so
that the number 20 (arrow) is at
the bottom.
: Insert three screws M5x72 (3)
through the holes marked "20"
and tighten them down against
the crankcase half.
21.3 34
20
20
20
2.3
10.4
39.3
Assembly tools without "20" holes
can be reworked as illustrated.
The drilled plate is shown as seen
from above.
Values are stated in millimetres.
MS 441, MS 441 C
: Turn spindle (1)
counterclockwise until the
crankshaft has been forced out of
the housing half on the ignition
side.
2
: Crankshaft (1), con-rod (2) and
the needle bearing between them
form a complete unit which must
always be replaced as such.
– Examine the two halves of the
crankcase and ball bearings and
replace if necessary, b 8.6.3.
8.6.2

Installation

Before installing the crankshaft,
it must be cleaned with a little
commercially available solvent-
based degreasant not containing
any chlorinated or halogenated
hydrocarbons.
1
Ignition side
The crankshaft stub must not be
damaged.
Examine and clean the sealing
faces of the crankcase half on the
ignition side (including the cylinder
sealing face). There must not be
any sign of damage on the sealing
faces.
1
– Line the crankshaft up so that the
tapered stub (arrow) faces the
ball bearing on the ignition side.
Wear protective gloves to prevent
injury due to burns.
– Heat inner race of ball bearing to
approx. 150 °C (300 °F).
: Press crankshaft fully home on
the crankshaft stub.
The crankshaft must be fitted
quickly, as the heat is transferred to
the stub and the inner race
contracts again.
49