| TROUBLESHOOTING | ||
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| Troubleshooting (engine) - continued |
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Symptom | possible problem | Solution | |
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Low engine power output and low speed, | Air fi lter blocked? | Clean or replace air fi lter. | |
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Incorrect valve clearances? | Adjust valves per engine specifi cation. | ||
black exhaust smoke. | |||
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Malfunction at injector? | See engine manual. | ||
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| Too much oil in engine crankcase? | Drain off engine oil down to uppermark on | |
| dipstick. | ||
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| Entire cooling air system contaminated/ | Clean cooling air system and cooling fi n | |
| blocked? | areas. | |
Engine overheats. | Fan belt broken or elongated? | Change belt or adjust belt tension. | |
Coolant insuffi cient? | Replenish coolant. | ||
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| Radiator net or radiator fi n clogged with dust? | Clean net or fi n carefully. | |
| Fan, radiator, or radiator cap defective? | Replace defective part. | |
| Thermostat defective? | Check thermostat and replace if necessary. | |
| Head gasket defective or water leakage? | Replace parts. | |
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