23
WORKSHOP MANUAL
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c)
Then put the left half of the crank mechanism into
the jig and use the S-204 guiding insert to press in the
centre pin. Fit the bearing Nr. 6206 C 36 (packed with
grease) and the distance ring on the centre pin. Smear
the distance ring with grease and fit on it the labyrinth
packing so that its lower part under the collar is turned
toward the right half of the crank mech. Then press in
the other bearing.
d)
Fit the right inner flywheel on the centre pin (the
crankpin is allready pressed in) so that it is turned
through 180°. After align it according to the index
lines, press it together with the assembled left side of
the crank mechanism
e)
Fit the connecting rod with the bearing and distance ring
on the crankpin of the right flywheel and then reposition the
crank mechanism in the pressing jig, so that the largest
possible area of the crankpin bears against the side of the
press drum. Then locate the right outer flywheel, adjust it in
the perpendicular position on the crankpin according to the
index lines, and press the assembly together.
3.3.
Crank mechanism – centering
Before the centering the crank mechanism
check that the index lines coincide and that
they are in a single plane. If necessary, tap the
right or left flywheel with copper mallet and
bring it to the required position. Check axial
clearance of the connecting rod according to
the limits given in the table. When centering
the crank mechanism, never tap the flywheels
or crankpins with the iron hammer. Use the S-
201 lever or the S-203 special pliers only when
it is necessary to spread the flywheels apart.
Following description can be considered as a
basic guide to the centering of the crank
mechanism, because this job has to be done by
experienced and skilled worker. For aligning
the crankmechanism by tapping the flywheels,
the mechanism has to be removed from the
centres of the centering fixture. This fixture
must be in perfect order to ensure that the
measuring results will not be distorted. Here,
also include instructions for removing the
ascertained excentricity deviations exceeding
those recommended by the documentation i.e.
greater that 0,02-0,03 mm.