31MS 210, MS 230, MS 250
– Pull the piston out of the cylinder
– b 6.5.
: Ease the hookless snap rings out
of the grooves in the piston
bosses.
VA
135RA085
: Use the assembly drift (2)
1110 893 4700 to push the piston
pin (1) out of the piston.
If the piston pin is stuck, release it
by tapping the end of the drift lightly
with a hammer. Hold the piston
steady during this process to
ensure that no jolts are transmitted
to the connecting rod.
– Remove the piston from the
connecting rod.
– Inspect needle cage and replace
if necessary.
If needle cage is press-fitted,
replace the crankshaft.
: Inspect piston rings and replace if
necessary – b 6.7.
VA
135RA087
: Fit needle cage (arrow) in the
connecting rod (not MS 210).
– Oil the needle cage.
: To ease assembly, heat the
piston slightly and push it over
the connecting rod.
Installed position of piston:
1 = Arrow
2 = Long stub of crankshaft
: Push the assembly drift, small
diameter first, through the piston
and small end (needle cage) and
line up the piston.
: Fit the piston pin (1) on the
assembly drift (2) and slide it into
the piston (the pin slides home
easily if the piston is warm).
: Modify sleeve of the installing tool
5910 890 2210 as shown:
a = 16 mm (11/16")
b = 8 mm (5/16")
VA
135RA093
a
b
6.6 Piston
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