38 DIESEL ENGINE
POSSIBLE CAUSE
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! Check and clean injection nozzles, being careful not to damage the orifice.
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! Replace injection nozzle(s) if not working properly after cleaning.
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! Check valves for leakage – grind valves to correct.
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! Check for bad valves, piston wear, ring damage or wear, or liner wear.
Have parts replaced.
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! Check and service fuel system
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! Check for and repair leaks. Fill to correct oil level.
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! Check for clogged oil filter and replace.
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! Check oil pump and lubrication system.
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! Check to see if engine bearing clearance is within specifications.
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! Follow oil and filter service instructions to prevent future occurrences.
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! Proper injection timing (crank angle before top dead center)
- Model 3CO93: 22
o
- Model 3CO93G: 24
o
- Models 3A139, 3A165, 4A200, 4A220: 18
o
- Models TD1300, TD1400, TD1700: 20
o
- Model 4A200T, 4A220T: 12
o
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! Check and adjust valve clearance when the engine is cold.
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Models 3CO93, 3CO93G, TD1300, TD1400, TD1700: intake 0.1mm, exhaust 0.1mm
- Models 3A139, 3A165, 4A200, 4A220: intake 0.25 mm, exhaust 0.30 mm
- Model 4A200T, 4A220T: intake 0.15mm, exhaust 0.15 mm
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! Clean or replace the element every 100hours of operation.
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! Check the injection pump and valve assembly. Replace as required.
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! NOTE: Poor quality fuel or improper fuels will accelerate injection pump wear.
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! Adjust to proper pressure 140~150 kgf/cm
2
(13.73~14.7Mpa, 1991~2133psi)
Clogged or faulty fuel injector
Low compression
Insufficient fuel flow
Seizure of moving parts
Incorrect fuel injection timing
Improper valve clearance
Dirty air cleaner
Fuel injection pump wear
PROBLEM: LOW ENGINE POWER OUTPUT
CORRECTIVE ACTIONS
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