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Crankshaft
The
double-bearing
cr ankshaft
is
a
casting
made
of
high-
strength cast
iron and
has
two cranks
arranged
in
the
same plane
at
an
angle
of
180°.
It
con.sists
of
two
(front and rear) journals,
a
web
and two
crankpin s.
The
crankshaft
ts
installed
in
the engine crankcase
in
two
bea-
rings
30 and 39
(Fig.
6).
Fitted
on the
fro nt
end of the
crankshaft
are
driving
pinion
4
of
the
t iming gear and
a
centrifuge,
the ta-
pered and of the
rear
journal
is
provi ded
with flywheel
22.
If
operated
under
normal
conditi
ons,
the
crankshaft together
with
the crankpin
sliding bearings
will
h
ave a
long
service
life. But in
Fig.
6.
Engine (longitud inal
section)
:
I -
oil
pump drive gear;
2-
front bearing
bod
y with
oil
pump;
3
-
centrifuge
screen;
4-
driving timing pinion;
5-
gasket
of
driving
tim
ing p
inion
;
6 -
centrifuge
washer;
7
-
sea ling r ing;
8 -
gasket
of
centrifuge
washer;
9 -
centrifuge
body;
10-
centrifuge
cover;
I I
-centrifuge sealing
r
ing;
12
-
contact breaker
holder
with cleat;
/3-
mo·
torcycle contact breaker DM302·01;
14-
cover fastening nut;
I
S-
breather;
16-
lock·
ing ring fo
r
covers;
17-
ignition coil
6204;
18 -
crankcase
front
cover;
I9-
cam-
s
haft front
bearing;
20-
ramshaft with gear;
21-
generator with
gear;
22
-
flywhee
l
with
clutch pins;
23-
camshaft
rear bea
ring;
24-
cr
ankshaft
g land;
25
-
clutch
dri-
ving pressure
disk;
26
-
clutch driven
disk;
27-
flywheel
lock
washer;
28-
flywhee
l
Woodruff key;
29-
flywheel
fastening
bolt;
30-
cran
kshaft
rear
bearing;
31
-clutch
driving
bearing disk;
32-
clutch
d
riving
inter
mediate
disk;
33-
su
mp
gasket;
34-
drain
plug;
35-
clutch pressure spring;
36-
oil header;
37-
oil intake
pipe;
38-
dis-
tributor
box
gasket;
39
-
crankshaft
front bearing;
40-
dist
ributor box cover
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