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| TROUBLESHOOTING | |
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| Troubleshooting (Engine) - continued |
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Symptom | Possible Problem |
| Solution | |
Low engine power output and low speed, | Air filter blocked? |
| Clean or replace air filter. | |
Incorrect valve clearances? |
| Adjust valves per engine specification. | ||
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 | |
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| dipstick. | ||
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| Entire cooling air system contaminated/ |
| Clean cooling air system and cooling fin | |
| blocked? |
| areas. | |
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Engine overheats. | Fan belt broken or elongated? |
| Change belt or adjust belt tension. | |
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Coolant insufficient? |
| Replenish coolant. | ||
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| Radiator net or radiator fin clogged with dust? | Clean net or fin carefully. | ||
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| Fan, radiator, or radiator cap defective? |
| Replace defective part. | |
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| Thermostat defective? |
| Check thermostat and replace if necessary. | |
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| Head gasket defective or water leakage? |
| Replace parts. | |
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| Troubleshooting (Trash Pump) |
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Symptom | Possible Problem |
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| Solution |
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| Not enough priming water in the |
| Add water. | |
| housing? |
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| Engine speed too low? |
| Increase throttle. | |
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| Strainer plugged? |
| Clean strainer. | |
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| Suction hose damaged? |
| Replace or repair hose, and clamps. | |
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Pump does not take on water. | Air leak at suction port? |
| Check that fittings are tight and properly sealed. | |
| Pump is located too high above water |
| Move pump closer to water. | |
| line? |
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| Debris collecting in pump housing? |
| Clean pump housing. | |
| Too much distance between impeller and |
| Adjust clearance by adding shims or replace | |
| volute? |
| impeller. Min. .006 inch - Max. .020 inch | |
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| Water leaking out weep hole between |
| Check condition of mechanical seal and gaskets, | |
| pump and engine? |
| between pump end and engine housing. | |
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| Engine speed too low? |
| Increase throttle speed. | |
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Pump takes in water, little or no discharge. | Suction strainer partially plugged? |
| Clean strainer. | |
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Impeller/Volute worn? |
| Adjust clearance by adding shims or replace | ||
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| impeller/volute. | ||
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| Fittings/clamps are not sealed properly? |
| Tighten, replace or add clamp. (Keep extra seals | |
Suction hose leaks at inlet. |
| on pump). | ||
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| Hose diameter is too large? |
| Use smaller diameter hose or replace hose. | |
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Discharge does not stay on coupling. | Pressure too high? |
| Check pressure, add additional clamp. | |
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Hose kinked or end blocked? |
| Check hose. | ||
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| Impeller jammed or blocked? |
| Open pump cover and clean dirt and debris from | |
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| inside housing. | ||
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Impeller does not turn, pump is hard to start. | Impeller and volute binding? |
| Adjust clearance by removing shim from behind | |
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| impeller. | ||
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| Defective engine? |
| See Engine Owner's Manual. | |
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