Sachs SA 340 - Page 14

Fig. 14
Gauging axial play of crankshaft
Fi g. 14
Permissible axial play 0.1 ... 0.2
mm (0.0039 ... 0.0079 in.).
Example:
Inse rt inner race of
cylindrical roller bearing
into outer race.
C rankcase po wer t akeoff
si de : seali ng s urfac e
(with
gas ket) to inner
ra · ce of bear ing 40.60 mm
Crankcase magneto
s ide: seali ng su rface to
inn erraceofbearing + 39. 50 mm
C
rankcase gap 80.10 mm
Dimension of
crankshaft, measured
over both cr ank webs,
with a 5 mm thick
s
pac er on power
takeoff and magneto
side - 79.00 mm
Axial
play
Permissible ax ia l
play
Difference
to be t aken up
1.10 mm
- 0.20 mm
0.90 mm
The diff ere nc e of 0.90 mm is tak en up by inser ting shims (2, Fig. 13) be tw ee n the sp ac er
(3, Fig.
13 ) and the inne r rac e of the cylindrica l ro ll e r bearin g (1, Fig. 13) on the cr ank -
pin power ta keoff si de.
Fitting the inner race of the cylindrical roller bearing
Wh en fitting the inner rac e of the cylindrical roller bea ri ng ( do not forg et space rs 3,
Fig .
13 on crankpin pow er tak eo ff side), an intermedia te plate (5, Fig. 13 ) sho ul d a l-
way s be p os itioned be tw ee n the two crank we bs . This plat e must be of such a si ze
that it ca n be s upported at both e nds, there by pe rmitt i ng t he crank s haft to li e free ly
in
po sition.
Ne
ver c lam p the crankshaft in a vic e at a crankpin or at the webs and neve r try to fit
the inner race by striking it. Th is will crush th e we bs and re nder the cra · nkshaft
uns erviceable .
12