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| Home / Engines / Kubota Engines / Kubota D600 |
Kubota D600 Troubleshooting
| Engine Model: Kubota D600 |
| Engine Type: 4-cycle vertical 3-cylinder water-cooled diesel engine |
| Total Displacement: 36.6 cu.in (0.6 L) |
| Rated Engine Power: 14 Hp (10.3 kW) at 3200 rpm |
| Fuel System: Fuel injection pump |
| Engine starts hard or doesn't start |
Fuel filter plugging - Change filter element.
Air in fuel tank - Bleed fuel tank.
Defective or clogged injection nozzle - Inspect nozzles and replace if necessary.
Fuel injection pump is not working correctly - Repair or install a new fuel pump.
Improper valve timing - Set the valve timing correctly.
Plugged fuel pipes - Service fuel pipes.
Unadjusted injection timing - Adjust according to specifications.
Worn cylinder or piston rings - Replace defective components.
| Engine starts but then stalls |
Fuel filter plugging - Clean or replace the filter.
Fuel injection pump malfunctioning - Change or repair the pump.
Air filter clogged - Clean or replace the element.
Nozzle opening pressure is not adjusted - Adjust as required.
| Engine shuts off suddenly during operation |
Incorrect adjustment of fuel injection pump timing - Set the fuel pump timing correctly.
Fuel filter plugged - Change the filter element.
Engine is not fully warmed up - Warm up the engine.
Defective or stuck injection nozzles - Repair or change injection nozzles.
| Engine stalls at low idle speed |
Incorrectly set low idle speed - Adjust as required.
Valve clearance is not correct - Adjust valve clearance.
Fuel injection pump is defective - Repair or replace injection pump.
| Low engine power |
Dirty or faulty injection nozzles - Replace injection nozzles.
Clogged fuel lines or hoses - Fuel hoses and lines must be clean.
Clogged air filter element - Service air cleaner.
Blown cylinder head gasket - Gasket should be replaced.
Injection timing is out of adjustment - Adjust according to specifications.
Fuel injection pump is faulty - Rebuild or install a new injection pump.
One of moving engine parts is faulty - Repair or replace defective components.
| Engine overheated |
Clogged radiator fins or leaking radiator cap - Install new cap or clean radiator.
Low coolant level - Refill to the correct level and inspect system for leaks.
Loose or defective fan belt - Change the fan belt.
Engine oil level is low - Need to add engine oil.
Damaged cylinder-head gasket - Gasket should be replaced.
Injection timing is improper - Set the injection timing correctly.
| Oil pressure is low |
Oil level is insufficient - Checking oil level and add if necessary.
Oil pump is defective - Replace as required.
Engine oil filter is plugged - Replace or service engine oil filter.
Worn or dirty relief valve - Replace or service relief valve.
Excessive oil clearance of crankshaft bearing - Inspect and replace or repair faulty parts.
Excessive crankpin bearing clearance - Test and replace or repair worn components.
| Excessive oil consumption |
Oil leaks: Seals or gaskets are wearing excessively - Replace defective parts.
Incorrect oil viscosity - Use oil of proper viscosity.
Piston rings are stuck or broken - Change piston rings.
Valve stems and guides are worn - Valves need to be changed.
Pistons or cylinder liners are scored - Check pistons and liners, replace as required.
| Engine knocking sound or abnormal noise |
Engine is not preheated - Warm up to required temperature.
Insufficient engine oil - Need to add engine oil.
Incorrect adjustment of fuel injection pump timing - Adjust fuel injection pump as required.
Piston wear or scoring - Have pistons replaced.
Misaligned or faulty connecting rod - Align or change connecting rod.
| Starter cranks slow |
Battery capacity is low - Charge the battery.
Battery won’t hold charge - Service charging system or install new battery.
Disconnected battery cables or bad terminals - Check wiring and clean or replace terminals.
| Starter does not work |
Battery is low or faulty - Charge or replace the battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery output - Battery needs to be recharged.
Damaged starter motor - Repair or replace starter.
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