Valmet 309 - Page 46

Use
lhe
a ioo
I
speclally
made for +he lnspec+lon
of
connecilng rod
(e.9.
Carl Larsson).
Place the
connecilng
rod bearlng
cap In lfs
posl+lon
noilng +he marklngs and tlghten
the
nuts evenly io +he torquo of 90 l{m
ln +he
case of 309, fll, 4ll and 6l'l englnes. Tlghten
the
connectlng rod screws
of the 612 englne
flrs+ io +he lorque o{ 30 Nm and then
each
sCf€ri 90o.
4.
l.,llth
the +ester
plns
ln a
verilcal
posl+ion you
can
deiernine
ihe
connocflna
rod
deflec+lon.
2. Fl+ the connectlng rod to ihe lnspecilon
iool
and ihe
olsion oln ln+o lis
bush.
Place
+he Indlca+or on fop of
l{Ifh ihe
+es+er
plns
of the
horizontal
posl+lon
check
l-he
tor
s lon
.
fhe
p
I sfon
p
In.
lndlca+or ln
a
connec+lng rod
5. Also
check the
connec+lng rod for any S-shaped
deflecl-lon.
Thls
is
done
by uslng a sllde
gauge
to measure
the dlstance bete€€n +he
pln
bush
ouier
edge and ihe
lnspec+lon tool
plane
surface.
Then +urn the connectlng rod the o+her
vay round
and measure +he
same
dlsfance agaln.
The
dlfference may
nol exceed 0,6 nrn.
420
l.4easure +he length of +he
612 englne connec+lng
rod
scrers and
compare them wl+h the nax length
glven
ln flg. 4 20.
lt lhe long+h of any
screw
exceeds +he max
llml+, replace fhe
scre{ wlth a
o9ll orlg r
l{9
recommend
that
you
rgplace screws
wlth new ones each
tlme
you
open them.
CON}ECTI NG ROD XEIGHT
CLASSES
E.
The
connec+lng
rods
are dlvided Into
rtelghi
classes a+ 2o-gramne Intervals. A le+ter
Indlcatlng
the welght class ls
markad
on
+he
connec+lng rod
slde
face.
The cyllndor ordlnal
number
ls stamDed on +he same slde as fhe
welghl class.
All
the
connecilng
rods In one
englne
mus+ be of the sano uelghi class, l.e.
+he max
pernlsslble
vlelghf dlflerence ls 20
g.
Le++ers lndlcate welghi
classes as tolloxs:
5 0 9 englne
s
s
I
K
Welght
1990
-
2010
2010
-
2030
2030
-
2050
2050
-
2010
Spcre
parf
no
4360
36562
8160
J6561
8560
56564
8360 36565
4-13
4
2l