Ball Bearing / Crankcase - Stihl MS 441 Manual

Ensure that the sleeves (arrows)
enter the holes and that the housing
gasket is not jammed or buckled.
– Unscrew nuts.
– Turn spindle clockwise to remove
assembly tool.
– Take out screws M5x72 which
were fitted to prevent twisting.
: Fit screws (arrows) and tighten
them down working cross-wise.
– Tightening torques, b 3.5.
52
: Install circlip (1) in groove
(arrow).
– Examine and install piston,
b 8.7.2.
– Examine and install cylinder,
b 8.5.
– Reassemble all other parts in the
reverse sequence.
8.6.3

Ball bearing / crankcase

If the two halves of the crankcase
are damaged, they can be replaced
separately.
New crankcase halves are supplied
with the relevant parts already fitted
– see spare parts list. Those parts
1
which are not supplied with the new
crankcase halves must be removed
from the old halves and examined
or replaced if necessary.
The serial number must be punched
2.5 mm deep into the number strip
of the crankcase with figure stamps
before installing a new crankcase.
If the original crankcase is reused,
install new oil seals and ball
bearings, remove the gasket
residues and thoroughly clean the
sealing faces. The sealing faces
must be absolutely clean to ensure
a perfect seal.
Examine both crankcase halves for
cracks and all sealing faces for any
signs of damage.
– Refer also to the troubleshooting
chart, b 4.7.
– Remove crankshaft, b 8.6.1.
– Wear protective gloves to prevent
injury due to burns.
MS 441, MS 441 C