Smoking Exhaust; Knocking Noise In Engine - YANGDONG SERIES Y85 Operation & Maintenance Manual

ill. Smoking Exhaust (see Table 6)
Table 6
Causes
I.Engines overloaded.
2.Fuel injectors not well atomized.
3.Fuel unqualified.
4.Combustion incomplete.
.1
Remedies
l.Reduce the load properly and in case of unsuited
Illatching.adjuslment should be made.
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
101'1
compression pressure.Remedy
in accordance with specific problems.
Causes
IV. Knocking Noise in Engine (see Table 7)
Table 7
I
Remedies
-l-.A-d-v-an-c-'e-.d-fl-le-I-i-n-je-c-t-io-n-a-' n -gl-e-i-n-co-rr-ec-t-.
--~eadjust
it according to specification.
2.Air trapped in fuel systems. 2.Exhaust air.
3.Fuel supply for each cylinder unbalanced. 3.Readiust fuel suppiy.
4.Fuel unqualified. 4.Use clualified supply.
5.Wear of certain components exceeds limits. 5.RepJace them.
V.Lube Oil Insufficient or No Pressure (see Table 8)
Table 8
Causes Remedies
1. Oil level in oil sumps too low.
2. Serious leakage from oil pipelines.
3. Oil strainers, oil filters and pipelines clogged.
4. Oil gauges damaged or gauge lines choked.
5. Oil too thin.
6. Oil pump
~cars
seriously worn off, with excessive
clearance:.
7. Pressure relief valves of oil filter cease to function.
8. Main bearings, connecting - rod bearings and
camshaft bushinJ!;s seriously worn off with excessive
clearance.
6-2
l.Add oil up to mark line on dip sticks.
2.Eliminate leakage.
3.Clean and replace elements if necessary.
4.Check and replace elements if necessary.
S.Use qualified oil.
6.Adjust the clt:urdnce or replace them.
7.Check and repair or readjust them.
8.Check 'and repair or replace them.