Kubota D1105-E4B Troubleshooting
| Engine Model: Kubota D1105-E4B |
| Engine Type: 4-cycle vertical 3-cylinder indirect injection liquid-cooled diesel |
| Total Displacement: 68.6 cu.in (1.12 L) |
| Rated Engine Power: 24.8 Hp (18.5 kW) at 3000 rpm |
| Aspiration Type: Naturally aspirated |
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| Engine starts up hard or will not start |
Fuel filter plugged - Clean or replace the filter.
Air in the fuel pipes - Bleed the fuel pipes.
Faulty or dirty injection nozzles - Replace injection nozzles.
Defective fuel injection pump - Repair or install new pump.
Valve timing is improper - Correct or change timing gear.
Fuel pipes are clogged - Clean fuel pipes.
Injection timing is out of adjustment - Adjust according to specifications.
Excessive wear of piston rings and cylinder - Change defective components.
| Engine starts but stalls suddenly |
Dirty fuel filter - Service the filter.
Fuel injection pump is defective - Replace or repair injection pump.
Plugged air cleaner - Service air cleaner.
Unadjusted nozzle opening pressure - Set up as recommended.
| Engine stalls during operation |
Incorrect adjustment of fuel injection pump timing - Adjust as recommended.
Clogged fuel filter - Change filter element.
Coolant temperature is low - Warm up engine as required.
Stuck or clogged injection nozzle - Repair or replace injection nozzles.
Low idle speed setting is not correct - Adjust low idle speed.
Incorrect valve clearance - Adjust to proper valve clearance.
Defective fuel injection pump - Replace injection pump or repair it.
Defective injection nozzle - Change fuel injection nozzles.
Clogged fuel hoses or lines - Clean fuel system hoses and lines.
Clogged air cleaner - Service air cleaner.
Cylinder head gasket is damaged - Cylinder-head gasket replacement required.
Injection timing is incorrect - Check injection timing adjustment.
Fuel injection pump is defective - Replacement or repair required.
Any of moving engine parts is worn - Replace or repair damaged components.
Dirty radiator fins or faulty radiator cap - Change cap or clean radiator.
Low engine coolant - The cooling system needs to be refilled and checked for faults.
Broken or loose fan belt - Replace as required.
Engine oil level is insufficient - Check oil level and add oil as required.
Cylinder-head gasket is leaking - Replace the gasket as required.
Incorrect injection timing - Adjust as recommended.
Low oil level - Fill the crankcase with oil.
Oil pump is defective - Install a new pump.
Clogged oil filter element - Change or service engine oil filter.
Relief valve is seized or worn - Relief valve need to be replaced or cleaned.
Excessive crankshaft bearing clearance - Inspect and change or repair worn components.
Excessive crankpin bearing clearance - Inspect and change or repair worn components.
| Engine using too much oil |
External oil leaks: Worn gaskets or seals - Install new components.
Oil viscosity is incorrect - Use oil of proper viscosity.
Piston rings are stuck or broken - Have piston rings replaced.
Damaged valve stems or valve guides - Valves need to be changed.
Pistons or cylinder liners are damaged - Inspect liners and pistons, replace as necessary.
Engine not warmed up - Warm up engine as required.
Engine oil insufficient - Checking oil level and add if necessary.
Improper setting of fuel injection pump timing - Set up as recommended.
Scored or worn pistons - Replace the pistons as required.
Connecting rod is defective or not aligned - Align or change connecting rod.
Low battery voltage - Charge the battery.
Battery won’t hold charge - Service charging system or install new battery.
Disconnected wiring or bad battery terminals - Connect wiring correctly or install new terminals.
Battery is discharged or defective - Charge or change the battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Low battery output - Battery needs to be recharged.
Starter motor is damaged - Starter needs to be changed.
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