Valmet 309 - Page 41

COi'NTERBALA
CE
IGCH^NI
ST4
4II
45
Counterbalonca
rFchanlsm 4l
I
l. Body
2.
Bal I
5.
Shaft
4.
Thrust
p
lato
5. Bearlng
bush
6.
Counferba lance
7. Pln
8.
Shlm
9. Hexagon
socket
10. Lcck
screv
ll.
Banjo boli
12. Connectq-
li.
Lube
oll
plpe
So.ie
of ihe
,tll
englnes
are furnlshed tlth
a
counierbö lance
nEhnanlsm rhere
ihe
eccenirlc
reighis
ro+ailng ai a speed
double +he speed
of
the englne
compensaie
rlth
+helr
orn
Inerila
the Ine-tla fq@s
caused
by the
pd-fs rlth +o
and fro rptlon,
lhe
pls+ons
and l-he s|nall
end
of conneqt lng rods.
The bodv
(l)
of
ihe coun+erbalan@
rEchanlsm ls
flxed io ihe cyllnder block
bottorn face.
The
shafis
(3)
locaied
in the body have
b€arlngs
bushes
(5)
for ihe actual counferba
lances
(6).
The counierba lan@s
are drlven by the
gear
rlm
on
ihe
ci-ankshaf+
through
gears.
The
bearlngs
of iho counierbalance
assembly are
lubrlcaled
by the eflglne
pressure
lubrlca+lon
sysiem
ihrough
a lube oll
plpe
(lJ).
The clearance
b€fneon lhe
gear
of fhe counter-
balance
nechanlsm
and
the crankshafi
gear
rlm
ls ödjusied lrlth +he shlms
(8)
placed
be+we€n
+he body and
ihe
cyllnd€t'
blck.
4-A