6
-4
DIESEL ENGINE
ENGINE LACKS POWER
Possible causes Actions
Carbon deposit at injection nozzle
inlet
•
Clean the inlet and needle valve carefully not to damage the nozzle inlet.
•
Check the nozzle. Replace with a new nozzle if necessary.
Leaks from valve due to low com-
pression
•
Defective valve or excessively worn ring, piston, and liner will result in low compression.
Replace it with a new one.
•
Polish the valve.
Lack of the fuel
•
Check the feul system.
Moving parts overheating
•
Check the lubrication system.
•
Check if the oil fi lter is working properly.
•
Filter screen or element with debris will degrade the lubricant cleaning screen.
Replace the element.
•
Check the injection timing
•
Proper injection timing (crank angle before top dead center)
BTDC 18˚- 3C093LWS/3C100LWS/3A139LWS/3A150LWS/3A150LWG/
3A165LWS/3B183LWS/4A200LWS/4A220LWS/4A220LWG
BTDC 24˚- 3C093LWG
BTDC 22˚(CTD, main) - 4B243LWS
BTDC 12˚(sub port) - 4A200TLWS/4A220TLWS
In correct valve adjustment
•
Check and adjust valve clearance when the engine is cold.
Intake ; 0.15mm Exhaust ; 0.15mm - 3C093LWS/3C093LWG/3C100LWS
Intake ; 0.25mm Exhaust ; 0.30mm - 3A139LWS/3A150LWS/3A150LWG/3A165LWS/
3B183LWS/4A200LWS/4A220LWS/4A220LWG/
4B243LWS
Intake ; 0.20mm Exhaust ; 0.20mm - 4A200TLWS/4A220TLWS
Air cleaner contamination
•
Clean or replace the element every 100hours of operation.
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