Kubota D1105T Troubleshooting
| Engine Model: Kubota D1105T |
| Engine Type: 4-cycle vertical 3-cylinder liquid-cooled diesel |
| Total Displacement: 68.6 cu.in (1.12 L) |
| Rated Engine Power: 31.5 Hp (23.5 kW) at 3200 rpm |
| Aspiration Type: Turbocharged |
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| Engine starts up hard or doesn't start |
Fuel filter element clogging - Replace the filter element.
Air in fuel tank - Bleed fuel tank.
Defective or clogged injection nozzle - Service or change injection nozzles.
Fuel injection pump malfunctioning - Repair or change injection pump.
Valve timing is wrong - Correct or replace timing gear.
Fuel pipes clogging - Service fuel pipes.
Improper injection timing - Adjust injection timing as required.
Cylinder or piston rings are worn - Change faulty parts.
| Diesel starts but then stops |
Fuel filter element clogging - Replace the filter element.
Fuel injection pump is not working correctly - Replace injection pump or repair it.
Clogged air filter - Clean air cleaner element.
Nozzle opening pressure is not adjusted - Set up as recommended.
| Engine shuts off while running |
Fuel injection timing is wrong - Adjust according to specifications.
Fuel filter element is dirty - Change filter element.
Engine has not warmed up to the recommended temperature - Warm up the engine.
Injection nozzles are stuck or clogged - Repair or change injection nozzles.
| Engine shuts off while idling |
Incorrectly set low idle speed - Need to adjust idle speed.
Excessive valve clearance - Adjust to proper valve clearance.
Defective fuel injection pump - Replace injection pump or repair it.
Faulty or dirty injection nozzles - Test injection nozzles and change if necessary.
Restricted fuel lines or hoses - Clean fuel system lines and hoses.
Plugged air cleaner - Air filter maintenance required.
Leaking cylinder head gasket - Replace cylinder head gasket.
Incorrect injection timing - Adjust as recommended.
Fuel injection pump is faulty - Rebuild or change fuel pump.
Any of moving engine parts is worn - Repair or replace defective components.
Radiator core is clogged or radiator cap is leaking - Clean radiator or replace cap.
Coolant level is low - Top up coolant fluid and check system for leaks.
Fan belt is worn or faulty - Change the fan belt.
Not enough engine oil - Fill up the engine oil.
Defective cylinder head gasket - Gasket should be replaced.
Improper injection timing - Adjust as recommended.
| Insufficient oil pressure |
Low oil level - Need to add oil.
Oil pump is worn or damaged - Replace as required.
Clogged oil filter element - Clean or change engine oil filter.
Relief valve is stuck or broken - Change or clean relief valve.
Excessive crankshaft bearing clearance - Inspect and replace or repair faulty components.
Crankpin bearing clearance is excessive - Test and replace or repair worn components.
| Excessive engine oil consumption |
Oil leakage: Damaged gaskets or seals - Change worn parts according to specifications.
Wrong oil viscosity - Fill up with the proper oil viscosity.
Piston rings are stuck or worn - Change the piston rings as required.
Valve guides or stems are damaged - Replace the valves.
Pistons or cylinder liners are damaged - Check pistons and liners, install new parts as required.
Coolant temperature is low - Normalize the temperature by warming up the engine.
Insufficient engine oil - Check oil level and add oil as required.
Wrong setting of fuel injection pump timing - Adjust as recommended.
Pistons are broken or worn - Replace the pistons.
Connecting rod is worn or misaligned - Replace or align connecting rod.
Battery power is low - Charge the battery.
Battery is draining quickly - Service battery or replace it.
Disconnected battery cables or bad terminals - Check cables and clean or change terminals.
Battery is discharged or defective - Replace or charge as required.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Low battery capacity - Low battery charging, charge as required.
Starter motor failure - Starter needs to be changed.
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