Kubota D1302 Troubleshooting
| Engine Model: Kubota D1302 |
| Engine Type: 4-cycle vertical 3-cylinder liquid-cooled diesel |
| Total Displacement: 79.3 cu.in (1.29 L) |
| Rated Engine Power: 30 Hp (22.4 kW) at 2800 rpm |
| Aspiration Type: Naturally aspirated |
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| Engine difficult to start or doesn't start |
Fuel filter element is dirty - Filter maintenance required.
Air in the fuel pipes - Bleed the fuel pipes.
Fuel injection nozzles fault - Install a new kit of correctly balanced nozzles.
Damaged fuel injection pump - Repair or replace injection pump.
Wrong valve timing - Correct or change timing gear.
Restricted fuel pipes - Service or change fuel pipes.
Improper injection timing - Check injection timing adjustment.
Excessive wear of piston rings and cylinder - Change faulty components.
| Diesel starts but immediately stops |
Fuel filter element is clogged - Change filter element.
Fuel injection pump is broken - Repair or change injection pump.
Air cleaner is dirty - Air filter maintenance required.
Unadjusted nozzle opening pressure - Adjust as recommended.
| Engine stalls during operation |
Improper fuel injection timing - Set it up as required.
Fuel filter element is dirty - Service the filter.
Engine has not warmed up to the recommended temperature - Engine is not warmed up to the required temperature.
Injection nozzles are stuck or clogged - Change or repair injection nozzles.
Too low idle RPM - Correct low idle settings.
Excessive valve clearance - Have it adjusted.
Fuel injection pump is not operating properly - Rebuild or replace pump.
Faulty fuel injection nozzles - Install a new kit of correctly balanced nozzles.
Fuel lines or hoses clogging - Fuel hoses and lines must be clean.
Intake air restriction - Air filter maintenance required.
Cylinder head gasket is damaged - Change cylinder head gasket.
Injection timing is improper - Adjust injection timing as required.
Fuel injection pump malfunctioning - Repair or replace injection pump.
One of moving engine parts is faulty - Repair or replace defective parts.
Clogged radiator fins or leaking radiator cap - Install new cap or clean radiator.
Coolant level is low - Fill radiator to proper level and check components for faults.
Damaged or worn fan belt - Replace the fan belt.
Engine oil insufficient - Add oil to the engine crankcase.
Cylinder-head gasket is leaking - Install new cylinder head gasket.
Injection timing is wrong - Adjust injection timing as required.
Lack of oil - Need to add oil.
Worn oil pump - Repair or replace.
Engine oil filter is plugged - Clean or change engine oil filter.
Relief valve is stuck or worn - Change or clean relief valve.
Clearance of crankshaft bearing is excessive - Test and replace or repair worn components.
Excessive crankpin bearing clearance - Test and replace or repair worn components.
| Engine consuming too much oil |
Oil leaks: Worn gaskets or seals - Replace defective parts.
Wrong oil viscosity - Use oil of proper viscosity.
Stuck or worn piston rings - Install new piston rings.
Valve guides and stems are worn - Install new valves.
Cylinder liners or pistons are worn - Check pistons and liners, replace as required.
Coolant temperature is low - Engine is not warmed up to the required temperature.
Lack of engine oil - Add oil to the engine crankcase.
Improper fuel injection timing - Set it up as required.
Scored or worn pistons - Pistons replacement required.
Connecting rod is not aligned or defective - Alignment procedure or replacement is required.
Battery power is low - Battery needs to be recharged.
Battery drains quickly - Service or replace the battery.
Faulty battery terminals or disconnected cables - Connect wiring correctly or install new terminals.
Battery is drained or defective - Replace or charge as required.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery output voltage - Charge the battery.
Defective starter motor - Starter needs to be changed.
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