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| Home / Engines / Kubota Engines / Kubota D1305 |
Kubota D1305 Troubleshooting
| Engine Model: Kubota D1305 |
| Engine Type: 4-cycle vertical 3-cylinder water-cooled diesel engine |
| Total Displacement: 76.9 cu.in (1.3 L) |
| Rated Engine Power: 24.8 Hp (18.5 kW) at 2850 rpm |
| Fuel System: Indirect fuel injection |
| Engine starts hard or won't start |
Dirty fuel filter - Clean the filter or install new filter element.
Air in the fuel lines - Bleed the fuel lines.
Fuel injection nozzles are damaged - Inspect nozzles and replace if necessary.
Fuel injection pump is defective - Replace injection pump or repair it.
Valve timing is wrong - Adjust or replace timing gear.
Restricted fuel pipes - Service or change fuel pipes.
Wrong injection timing - Adjust as recommended.
Damaged piston rings and cylinder - Replace defective components.
| Diesel starts but stalls suddenly |
Dirty fuel filter - Replace the filter element.
Fuel injection pump is not operating properly - Replace injection pump or repair it.
Clogged air filter element - Change air filter element.
Incorrect nozzle opening pressure - Set up as recommended.
| Engine shuts off suddenly while running |
Timing of fuel injection pump is incorrect - Set up as recommended.
Fuel filter element is clogged - Change filter element.
Engine is not preheated - Warm up the engine.
Injection nozzles sticking or clogged - Change or repair injection nozzles.
| Engine stalls when idling |
Low idle speed setting is not correct - Adjust the low idle speed.
Valve clearance is wrong - Check and adjust.
Fuel injection pump is damaged - Repair or change injection pump.
| Engine power is insufficient |
Defective injection nozzle - Check injection nozzles and replace if required.
Clogged fuel hoses or lines - Clean fuel hoses and lines.
Dirty air filter - Service air cleaner.
Worn cylinder head gasket - Replace cylinder head gasket.
Improper injection timing - Adjust according to specifications.
Fuel injection pump is defective - Rebuild or replace pump.
Any of moving engine parts is worn - Repair or replace defective components.
| Engine overheated |
Radiator core is clogged or radiator cap is leaking - Change cap or clean radiator.
Engine coolant is insufficient - Fill the cooling system and check components for leaks or other faults.
Excessive wear of the fan belt - Belt change is required.
Engine oil level is low - Fill up the engine oil.
Worn cylinder head gasket - Gasket should be replaced.
Injection timing is wrong - Set the injection timing correctly.
| Oil pressure is low |
Engine oil level low - Fill the crankcase with oil.
Defective oil pump - Replace as required.
Dirty oil filter element - Replace or clean engine oil filter element.
Stuck or worn relief valve - Replace or clean relief valve.
Excessive oil clearance of crankshaft bearing - Inspect and replace or repair faulty components.
Excessive oil clearance of crankpin bearing - Inspect and replace or repair faulty parts.
| High engine oil consumption |
Oil leaks: Gaskets or seals may be damaged - Install new components.
Wrong oil viscosity - Use correct viscosity oil.
Worn or stuck piston rings - Piston rings replacement required.
Damaged valve stems or valve guides - Change the valves.
Pistons or cylinder liners are scored - Inspect pistons and liners, replace as required.
| Engine noises or knocks |
Engine has not warmed up to the recommended temperature - Engine is not warmed up to the required temperature.
Engine oil level is low - Checking oil level and add if necessary.
Improper fuel injection timing - Set up as recommended.
Pistons are scored or worn - Pistons replacement required.
Connecting rod is misaligned or defective - Need to change or align the connecting rod.
| Starter motor cranks slow |
Low battery power - Battery is drained, recharge it.
Battery discharges quickly - Battery needs to be serviced or replaced.
Corroded battery terminals or disconnected wires - Connect wiring properly or install new terminals.
| Starter motor is not working |
Battery is discharged or worn - Recharge or change battery.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Low battery voltage - Charge the battery.
Starter motor failing - Repair or replace starter.
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