Valmet 309 - Page 10

CYLIIDER
BLCOK AND FLYB}EEL TIOUSING
co{sTRt cT I oN
CYL
INDER
BLOCK
CYL
INDER
ELOCK
(4II)
l.
Cy I Inder
block
2.
Boarlng
bush
J.
Scrow
4.
Bearlng
cap
5.
Bearlng
cap
(9ulde
bearing)
o. Ptn
DUsh
7.
Cy
I lnder
I lner
8.
0-r Inq
seal
lno
9.
Ptug
icamshafi
llne)
10.
D
lpstlck
p
tpe
I
l.
Nui
12.
S+ud
'-
lJ.
Screw
14.
Sea I Inq
rlno
15.
P
luq
16.
Cup
p
lug
17.
Draln
cock
18. Pressure
qauoe
sender
19.
P
lpe
The
cylinder block
fo.ms
l-he
englne body to
whlch +he
other englne
conponents are flxed.
The
cyllnder llners
(7)
are of ret type t{hlch
nEans thä-t ihe
coolan+
comes
dlrecily
ln+o
contac+ rlth +he llner
ou+e. su.face. Th6
seal ing be+Heen +he
cyllnder llner lo|ler end
and
cyllnder block
comprlses of +ro o-rlngs
(8)
whlch
have been
placed
ln the
g.ooves
on the
cyllnder llner.
The top end ls sealed by means
of
a
head
gaske+
sl+uafed between +he
cyllnder
llner flange
and
cyllnder
head.
The accurö-te
flf+ln9
of the
cyllnder llner flange and
+he
mating
face of ihe flange
ln the cyllnder block
ls also
essentlal for ihe iop
end seallng.
l{e
ask
you
io note
thls
especially in connec+lon
v.l-i'h
cy
l
inder
llner
assenbly.
6l11612 englnes
höve an o-rlng
seal also
ln +he
top end of +he
cyllnder
llner. There
are
coollng grooves
whlch
nake fhe
coollng
of the
hot top
part
nore
efllclent.
The cyllnder
block
Incorporates
+he
camshafi-
whlch
has +ho Jronl
bearlng
poln+
(j09,
l and
4ll
englnes)
equlpped
rlfh a
separa+e bearlng
bush
(2)
r{hlle the
other
bearlng
poln+s
have
been machlned
In the
cyllnder
block dlrectly.
ln
611/612
englnos
€ve.y
camshaf+ bearlng
poini
has a
separöle bearlng
bush.
The
rear
end o{ the
camshaft
llne ls
blocked
wlth
a dlsc
plug
In 309,
fl I and 4ll
englnes
rhereas the
6ll
and 6'12
englnes
have a
plug
equlpped
r,lth
an o-rlng
seal.-
On
both
sldes of the rear
maln
bearlna
+here are
posltlons
for gulde
b€arlng
shells
icrankshafi
axlal
bear
ings).
2-3