Doosan DE08TS - Troubleshooting Summary

DE08TS Diesel Engines Major Maintenance25
Condition Causes Remedies
1) Starting difficult
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Valve’s poor shut, stem distortion Repair or replace
(1) Compression pressure
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Valve spring damage Replace valve spring
lack
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Cylinder head gasket’s leak Replace gasket
•
Wear of piston, piston ring or liner Adjust
2) Idle operation abnormal
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Injection timing incorrect Adjust
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Air mixing at injection pump Remove air
3) Engine output insufficient
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Valve clearance incorrect Adjust
(1) Continuous output
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Valve tightness poor Repair
insufficient
•
Cylinder head gasket’s leak Replace gasket
•
Wear, stick, damage of piston ring Replace piston ring
•
Injection timing incorrect Adjust
•
Fuel injection amount insufficient Adjust injection pump
•
Nozzle injection pressure Adjust or replace
improper or stuck
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Supply pump’s function lowered Repair or replace
•
Fuel pipe system clogged Repair
•
Air suction amount insufficient Clean or replace air cleaner
•
Turbocharger poor Repair or replace
(2) Output insufficient when
•
Compression pressure insufficient Disassemble engine
in acceleration
•
Injection timing incorrect Adjust
•
Fuel injection amount insufficient Adjust injection pump
•
Injection pump timer’s function Repair or replace
insufficient
•
Nozzle injection pressure, Repair, replace
injection angle improper
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Supply pump’s function lowered Repair or replace
•
Air intake amount insufficient Clean or
replace air cleaner
4) Overheating
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Engine oil insufficient or poor Replenish or replace
•
Cooling water insufficient Replenish or replace
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Fan belt loosened, worn, damaged Adjust or replace
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Cooling water pump’s function Repair or replace
lowered
•
Water temp. regulator’s operation Replace
poor
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Valve clearance incorrect Adjust
•
Exhaust system’s resistance Clean or replace
increased