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Yangdong Co. Y90 Series Spécifications Page 35

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Vue de la page 34
III.Smokinl!
Exhaust
(see Table 6)
Table
6
Causes
1.Engines overloaded.
2.Fuel injectors not well atomized
3.Fuel unqualified
4.('ombustion incolnplete
Remedies
I.Reduce the load properly and
in
case
of
unsuited
matching. aqjustlnent should be lnade.
2.Check the injection pressure and fuel spray. Replace
then
in
case
of
damage.
3.
Use qualified fuel.
4.Mainly caused
by
unqualified fuel injectors
..
incorrect
advanced
fuel
injection angle,leakage at cylinder head
gaskets and lo\\' compression pressure.Remdy
in
accordance with specific problems.
IV.Knockin2 Noise in
Eneinc
(see Table 7)
Table
7
Causes
1.Advanced fuel injection angle incorrect.
2.Air trapped in fuel systems.
3.Fuel supply for each cylinder unbalanced.
4.Fuelunqualified.
5.Wear
of
certain components exceeds limits
Remedies
I.Readjust it according to specification.
2.Exhaust air.
3.Readjust fuel supply.
4.lJse qualified supply.
5.Replace theln.
V
.Lube
Oil
Insufficient
or
No
Pressure
(see Table 8)
Table
8
Causes
1.0illevel
in
oil sumps too
low.
2.Serious leakage
from
oil
pipelines.
3.0il strainers,oil filters and pipelines clogged.
4.0il gauges damaged or gauge lines clogged.
5.0il too thin.
6.f)il pump gears seriously
worn
off,with excessive
clearance.
7.Pressure relief valves
of
oil
filter cease to function.
8.Main bearings, connecting-rod bearings and camshaft
bushings seriously
worn
off
\\;ith
excessive clearance.
6-2
Renedies
I.Add oil
up
to nlark line
on
dip sticks.
2.Eliminate leakage.
3.Clean and replace elenlents
if
ner'essary.
4.Check
and
replace elenlents
if
necessary
5.lJse qualified oil.
6.Adjust the clearance or replace them.
7.Check
and
repair or readjust
theIne
8.Check
and
repair or replace theln.
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