Piston
Nol
e:
In
case
Ihere are pistons with
square-pro
fil
ed
and
l-profiled rings,
fil
the l
oller
in
lo
Ihe
upper
recess (l
eg
points upward).
Heat
piston to 70 ...
80·
(
(158
...
1
76·
F)
and
fit
it
in position
on
the connecting r
od
by
means
of
th
e fixing bo1l. Arr
ow
on
piston crown must point
10
the exhaus
l.
In
se
rt
gudgeon
pin -
wi
th the
aid
of
withdr
awal
1001
(3,
Fig. 6) a nd inserti
on
bush
(2,
Fig. 6
),
if
necessary.
Use
slolled
board
(I, Fig.
6).
(o
ver
Ih
e crankcase,
fi
l Ihe two wire
ci
rcl
ips, making
su
re Ihal they
ar
e
corre
c
tl
y
seale
d.
Cy
lind
er
and
cy
lin
de
r he
ad
Scrape
off
th
e projecting
ends
of
the
gas
ke
t.
locate
Ihe
cy
linder flange
gaskel
wilh Ihe
graphiled
side facing the cr
ankcase.
Put pist
on
on slot
led
wooden
board
(1,
Fi
g.
6),
lightly
oi
l the cylinder
and
place
il in
pas ilion
over
the pislo
n,
laking
core
not 10
rolale
Ihe
cy
linder, olherwise
il
might
damage
the piston
ri
ng
s.
Remove
sl
olle
d bOard
and
secure cylinder
wi
lh 4 nuts M 10. These nuls should be
tightened
diago
nally, with 0 torque 01 4.6 .. .4.8 kpm (33.3 ... 34.7 I
t.
lb.) f
or
SW
14
(1
4
mm
across
fl
als)
and
a torque
012.
0 ... 2.2 kpm (14.7
...
15.9
It
.
lb.)
for
SW
17
(17
mm
ac
ross Ilals).
Fit
the cylinder head (decompressor lowards
power
takeoff side)
and
secure
il
wilh
4 hexagon h
ead
boilS M 10 x 55
(in
the
case
of
the SACHS
SA
340 C with 6 screws
M 8 x 60).
Ti
ghten bolts
diago
nally wilh a torque
of
4.6 ... 4.8
kpm
(33.3 ... 34.7
ft
.
lb
.)
for
M 10 x
55
and
with a lorque 0
12
.2
... 2.6 kpm (15.9 ... 18.8
fl.
lb.) for M 8 x 60.
Armature
base
plate
and
labyrinth ring
Inserl W oodruff key inio crankshaft.
Pass the insula
ti
ng lube with
lead
and
the ignition l
ead
(nol
in
the
ca
se
of
75
W
eq
uipment) throu
gh
th
e holes
in
the crankcase. Place
armature
bose p
late
(4,
Fig. 5)
in pos
it
i
on
so
tha
t the marks
(3,
Fig. 5)
are
li
ned up,
and
secure it
wi
th 3 fillist
er
head
screws M 5 x 12
and
washers.
Torque
0.4 ... 0.5 kpm (2.9 ... 3.6
It
. lb
).
Not
e:
N
ew
armature bo
se
plales hove no
li
ming mark
and
should be adjust
ed
by means
of
the longitudinal slots.
Put socket with r
ubber
cop
(2,
Fi
g.
5)
on
ig
nit
io
n l
ead
and
scr
ew
it
in
la the crankcase.
Fit
ru
bber
sleeve (I,
Fi
g.
5)
on
Ihe ignit
io
n tead. Hong spring into
ig
nition
lead
(laking
car
e I
hat
the
sp
ring
ge
ls inlo conl
act
wi
th the
core
of
the ignition lead)
and
inserl inlo
spar
k plug t
er
mina
l.
Inse
rt
labyrinth
ri
ng
(5,
Fig.
5)
and
secure it with 4 fillisler
head
screws M 5 x 4.
Magneto
flywheel
On
equipments 12 V
40
W a nd 12 V
75
W, check flyweight for ignition setting a nd com
fo r free movement
and
fill
annular
groove in com bore wi
th
heat
-resisling grease.
Degrease
the t
aper
of the crankshaft
and
Ihe
magneto
flywheel (on equipmen
ls
12
V
40
Wan
d 12 V
75
W take
care
of lubrica
nl
applied).
F
it
on magn
eto
housing wi
th
screwed
in
flywheel, making sure that the W
oodru
ff
key
engage
s accurate
ly
with
Ih
e
groove
in
Ihe flywheel.
Note:
Fig. 53
The
contact-breaker
hub of ma9-
neta flywheel with screwed
In
contact-
br
ea
k
er
hub musl
be
so
posilioned thai the mark
wL
w
on
anti-clockwise rota
ti
ng m
agneto
flywheel
and
Ihe
mar
k
~
R·
on
clockwise rotating
magneto
flr.-
whe
el
is
li
ned up with Ihe ho e
marked
"Rl
W
in
the
magneto
housing.
fig.
54
T
oke
core
when filling m
agneto
flywheel
on
to keyway thol
th
e
grooves marked
OR"
and
"l"
en-
gage
correctly,
i.
e. use
groove
marked
WL"
for
mognelo
fly
-
wheel
ro
latin
g anti -clockwise.
'"
"'~,
Fif!
.
54
35
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