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Yangdong Co. Y90 Series Spezifikationen Seite 19

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Seitenansicht 18
SECTION.4 ENGINE ADJUSTMENT
Fig. t Adjustment
of
valve lashes
3. slip a feeler gauge
between
th,-:~
rocker arnl
and
the
tip
of
the
intake
or
exhaust
valve steins of
the
1st
cyl inder respectively to check and adjust the
valve
la~;,hcs.lntake
va.ive lash and exhaust
valve
cover
ofthning
gear housing.
2.Turn
the
crankshaft
to rnake sure that the
piston
of
1st
cylinder is
at
the conlpression
TDC
position.'The tirrling nlark
on
the inspection
window
of
the fly\vheei housing exactly points to the
'.
0"
tnark
on
the tly\vhecl ritn
'!or
th{~
"
011
rnark on
th{~
crankshaft
pulley
is
aligned
\,,"ith
the pointer on
the
I
..
-\d.iustJnent
of
Valve
I.J3sh
When
the
engine is
maintained
and
repaired.,it is
necessary
to
check
and
adjust
the
valve
lashes.'fhe
recommended
nlethod
of
adjusting
the
valve systenl and valve lash is as follows:
stands.
1.Remove
the
cylinder
head
cover.(~heck
and
tighten the nuts fastening the rocker
aml
shaft
tash
in
cold
l11ust
be tht: value specified
in
section)
.1l·len after
turnin~~
the crankshaft
by
180"
to adjust the valve lash
of
other cylinders according to the engine firing order(! - 3- 4-2)for the
four cylinder engine
and'
-3-2
tor
three cylinder engine.
II.
Adjustment
of
In
it~tion
Tiolinf,!
1\1 obtain
the
tnosl econon1ical specific
111ei
conSllInption
and
to ensure norlnal operation
of
th~
engineJnjection
tirning should
be
adJusted properly.For the
Model
485
die~el
engincs,the
ang)c at
\vhich
injection begins
should
be the value specified in section I .
'fhe
adjusting
inl~thod
of
injection timing
is
as l(lllo\\'s:
1.
Vent
the air trapped
in
the fuel system'land t,
~ln
the crankshaf-t
to
f111
up the injection
pUlnp
\Vl!h
fuel.l)isconnect
Hle
injection pipe
of
the
1st
cyiinder..turn the crankshaft
slowly
in
the
direction
of
its rota[;on and at the satne
tin1C
ohserve
the
fuel level
in
the
hele
of
fuel pipe union.
\Vhen this
fuel
level iust starts to risc'!stop lurn
the
crankshaft
imtnediately.
4-1
Seitenansicht 18
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