DCA-25USIXF/DCA-25USI2XF—TROUBLESHOOTING (ENGINE)
TABLE 19. ENGINE TROUBLESHOOTING (CONTINUED)
SYMPTOM | POSSIBLE PROBLEM | SOLUTION | |
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| Fuel filter clogged or dirty? | Clean or change. | |
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| Air cleaner clogged? | Clean or change. | |
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| Fuel leak due to loose injection | Tighten nut. | |
| pipe retaining nut? | ||
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| Injection pump malfunctioning? | Repair or replace. | |
Engine revolution is not smooth. |
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Incorrect nozzle opening | Adjust. | ||
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| pressure? | ||
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| Injection nozzle stuck or | Repair or replace. | |
| clogged? | ||
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| Fuel over flow pipe clogged? | Clean. | |
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| Governor malfunctioning? | Repair. | |
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| Excessive engine oil? | Reduce to the specified level. | |
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| Piston ring and liner worn or | Repair or replace. | |
Either white or blue exhaust gas | stuck? | ||
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is observed. |
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Incorrect injection timing? | Adjust. | ||
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| Deficient compression? | Adjust top clearance. | |
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| Overload? | Lessen the load. | |
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| Low grade fuel used? | Use the specified fuel. | |
Either black or dark gray |
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Fuel filter clogged? | Clean or change. | ||
exhaust gas is observed. | |||
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| Air cleaner clogged? | Clean or change. | |
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| Deficient nozzle injection? | Repair or replace the nozzle. | |
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| Incorrect injection timing? | Adjust. | |
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| Engine's moving parts seem to | Repair or replace. | |
| be seizing? | ||
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Deficient output. | Uneven fuel injection? | Repair or replace the injection pump. | |
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| Deficient nozzle injection? | Repair or replace the nozzle. | |
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| Compression leak? | Replace head gasket, tighten cylinder head bolt, glow plug and | |
| nozzle holder. | ||
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