Valmet 309 - Page 82

Ch€ck
the exhaust
manlfold
for
seallng and ih€
torque
of
the retalnlng
nufs
(60
Nm) as
rell
as
posslble
danages
(cracks,
dls+ortlon,
@rroslon,
etc.).
Also
Inspec+ ihat
ihe iurbo
ls
properly
flxed
to the
exhaust manltold.
Flx
fhe
oxhous+
manlfold
uslng always new
g€skeis.
Run
lhe
englne
rarm and
check ihe
torque
of the
refalnlng nuis
(60
Nn).
Ensura thai
fhere
6re no
extra obs+ructlons
ln
the-exhaust
plpe
or
In +he
sllencer whlch mlgh+
bulld
up exc€sslve
b€ck-pressurs
fo the
exhaust
gosos
coolng from
ihe turbln€
vrh€el.
TIJRtsOCMRGER
(DS
engl
nes)
To
ensure
+hai
+h9 turbo
functlon ls
faulfless
4. Measure
the
end play
of the
turbo
shaft.
Sef
the tip
of the
dlat
gauge
on the
shafi
end
and
nbve
the
shaff
longltudlnally,
back and
forih.
uqflpa.e
th€
resul+
rlth
the ratlng.
lf
the
€bove
Inspectlons
reveal
dahages
oi.
excess
lve reaa,
renove
.i'he
turbo
for
-repalr
(lnstruqtloos,
polnt
8 2 B).
lf ihe
englne
operaflon
Is
no+ normal
and ihe
lufP
Is noi
dörnaged
o|.
excesslvely
worn,
fhe
folloying
reasons
may
lle behlnd
fhe
irouble:
-
alr
fllfer
clogged
-
leaks
In lnle+
or
exhaust plpes
leaks
ln
gaske+
ot turbo
moun+lng
flonge
-
lnjectlon
pump
ilmlng
lncorreci
ör opeiailon
rau
tty
-
fhrofile
leverage
talsely
adjusiod
-
lnjecfors
falsely
adJusiäd
oi
malfuncflonlng
-
fuel
fged
pressura
lor
(9.q.
fuel
fllfer
clogged
)
- englne
coopresslon
pressure
lovr,
valve
cl6arances
ml
sadJ
usted
REI,|oV
ING I}E
TURBOCHARGER
R€rnove.
+he_re+alnlng
scrors
of +he
exhåusf plpe
and take
off
ihe
plpe.
Dlsconnoct
+he lurbo
alr
p
lpes.
remove
the
p
lpe.
,.
ifffi:
the
turbo
ftxtng
screrls
and remove
the
,.
:li::.f."T:r"Jlve
ptuss
rn
ihe
rurbo
lnte+
ond
6.
^.
DEIEilIINING
IHE
@T{DITION
OF T}C TURBOCMRGER
lf
you
suspeci
fhai +he operailon of the
iurbo
ls
unsa+lsfactory,
check lhe follov.tng:
l.
Check
the
condlilon
of ihe turblne
rheel and
the
+urbo
rotor vlsually.
The
btades
should
have no
damag€,
bend or
qlhe
ear coused by
forolgn parf
lc les.
2.
S€€
+hot fhere
are no
oll leaks lnio +he
furblne
houslng
o|.
iurbo
houslng
+hrough
the
shaf+
se€
ls.
otel
Durlng ldllng th6re nay
occur
sllght
oll
leakage
ln +he
compresslon slde.
Thls ls
however,
no reason
for
concern, unless ll-
causes
hlgher ol I consumptlon.
J. Meosure
the radlal
play
of ihe furbo
shoft.
+he flp
of the
dlal gauge
on +he
slde
of
shatt
and
move
the
shaf+
laterally.
Compare
rosu
lt
wlih ihe
ratlng.
8-4
aa
2.
B.
t7
fhe
the