37MS 440, MS 440 C
: Remove the gasket from the
crankcase.
VA
176RA108
– Unscrew the spindle of service
tool ZS (1) 5910 007 2220 (1) a
little (left-hand thread)
Make sure the retaining ring at the
clutch side has been removed –
b 6.3
VA
176RA332
2
: Position the service tool ZS (1)
5910 007 2220 against the
starter side so that the
number 12 (2) on the plate is at
the bottom.
The cylinder flange faces up.
: Fit three M5x72 screws (arrows)
in the holes marked "12" and
tighten them down against the
drilled plate.
: Turn spindle (1) counter-
clockwise until the crankshaft. is
pushed out of the ball bearing.
VA
176RA110
1
The crankshaft (1), connecting
rod (2) and needle bearing form an
inseparable unit. It must always be
replaced as a complete unit.
When fitting a replacement
crankshaft, always install new oil
seals and ball bearings.
VA
176RA111
1
2
: Drive out the deep groove ball
bearing on the flywheel side with
press arbor (1) 1120 893 7200.
VA
176RA112
1
: Drive out the deep groove ball
bearing on the clutch side with
press arbor (1) 1118 893 7200.
– Inspect both halves of the
crankcase for cracks and replace
if necessary.
VA
176RA113
1
The complete crankcase must be
replaced, even if only one half is
defective.
Check the condition of all other
parts, replace if necessary and
transfer to the new crankcase.
If only the ball bearings are
replaced, all rubber and polymer
components, such as the intake
hose, stop buffer and annular buffer
can remain in place.
If the crankcase has to be replaced,
all the components still fitted must
be reused.
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