Fin. 10
f ig.
11
Fitting the oil s
eal
12
Fi
g.
l0
Place the extracting tool
in
posi-
tion
in
such a way that the two
hooks
(4)
gr
ip behind the
sheet
steel
rim
of
the oil seal. Pre-ten-
sion the two legs
(2)
evenly with
cylinder
head
screws
(1),
taking
core
lhat
shaft
(5)
and thrust
screw
(3)
are
in
alignment.
Screw
in
thrust screw
and
extrac
t
oil seal.
Fig
.
11
If the
gop
between
shaft
and
sheet
steel
rim
of oil seal
is
too
narrow
and
the extracting tool
cannot
completely be placed
in
position, toke
off
one
leg
of
the
extracting tool
and
insert both
hooks
(1)
in
inclined position.
Remount leg
and
exlract oil
seal
as
described under Fig.
10,
Note
:
tf
the oil seal has
gal
st
uck
(oxi
-
dation). the sheet steel
rim
may
break, Therefore
it
is
advisable
to knock the oil seal out
of
its
force
fit
by means
of
a tube.
Fig.
12
Before fitting the oil seal,
fill
the
space
around
the tension spring
with a litt
le
heat-resisting
grease
and
lightly
smear
the
seal
ing lip.
Ta
protect the sealing lip
of
the
oil seal from
damage
caused by
sharp
edges
on
the shaft, use
shell sleeve.
If
necessary, put
smooth adhesive t
ape
around
sharp
edges.
Pl
ace
oil seal
in
position
and
press
it
in
by means
of
a suitable
tube, taking
core
of
exact instal-
lation dimension
x,
a
and
y
(Fig.
8).
The oil seal must not be tilted
when being pressed
in.
Changing cranksha
ft
bearings
Heat
crankcase
halves to
about
100
...
150·
C
(212
...
302·
Fl.
Remove
outer
race of
bearing
and
cran
k
shaft
oi
ls
seals.
Insert new
outer
race
of
roller
bearing
into the warm
crankcase
half until they strike
a stop.
Press
in
oil
sea
l (with
sealing
lip inwards) until they
ore
flush.
Press
in
new
grooved
ball
bearing
into the worm crankcase half
on
the
magneto
side
un
t
il
it
strikes a stop. Press
in
crankshaft oil
sea
l until flush only
after
the crank-
case
halves have
been
screwed together.
Have a look
at
the
table
of
crankshaft
bearings
on
page
10.
Removal
of
inner race
of
roller
bearing
and
grooved
ball
bearing
Fig.
13
Puil
off
inner race
(1)
and
groov-
ed
boll
bearing
(S)
by means
of
the
appropriate
extractor
shells
(10
and
7),
clamping rings
(9
and
8)
and
withdrawal tool (11; re-
pair
tool no.
17
to
23).
Remove compensating washers
(2),
shim
(3),
spacer
(4)
or
spacer
bush.
Fig.
13
13
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