Sachs SA 280A - Page 16

Fig. 14
Gauging axia l play of crankshaft
F ig. 14
Permissi ble
ax ia l pl ay 0.1 ... 0.2 mm
(0.0039
... 0.0079 in.).
Ex
amp le (a ccor d ing
to Fig. 17 page 15):
In sert inne r ra ce of
cylindrical roller bearin g
int o ou te r race.
Crankcase power takeoff s ide :
sea ling surfa ce (with
gaskeijtoinnerrace
of be aring 31.10 mm
C
ra nkc ase magneto side:
sealing su rface to inner
race of bearing + 49.00 mm
Crankcase gap 80.10 mm
Dimension a, Fig. 17
(or,
acco rding to the
engine ve rsion ,
Fig. 15
or 16) - 79.50 mm
0.60 mm
P er miss ib le ax ia l play - 0.20 mm
Diff
eren ce to be
taken up 0.40 mm
Th e diff e rence of 0.40 mm is tak en up by in se rting shims (2, Fig. 13) b etwee n the spacer
(3, Fig. 13) and the inner race of the cylindrica l roll er bea ring (1, Fig. 13) on the
crankpin power tak e off side.
Fitting the inner race of the cylindrical roller bearing
When fitting the inne r ra ce of the cyl indrical roller bea ring (do not forg et, acco rdi ng
to e ngin e ve rsion: space r bu sh 2, Fi g. 15, washer 2 and cr ankpin 3, Fig. 16 , and spacer
2, Fig. 17), an interm e diate plate (6 , Fig. 13) s hou ld a l ways be positioned betw ee n the
two crank webs. This plat e mu st be of such a size th at it can be s uppor ted at both
ends, the reby permitt in g the crankshaft to li e fr ee ly in po sition.
Never cl
amp the cra nks haft in a vic e at a c rank pin or at the w ebs and nev er try to
fit
the i nner ra ce by s triking it. T hi s will crush the webs and rende r the cran kshaft
un serv ic eab l e.
14