Kubota D905 Troubleshooting
| Engine Model: Kubota D905 |
| Engine Type: 4-cycle vertical 3-cylinder liquid-cooled diesel |
| Total Displacement: 54.8 cu.in (0.89 L) |
| Rated Engine Power: 23.5 Hp (17.5 kW) at 3800 rpm |
| Aspiration Type: Naturally aspirated |
____________________________________________________________________________________
| Diesel engine hard to start or doesn't start |
Fuel filter element is dirty - Service the filter.
Air in the fuel pipes - Bleed the fuel pipes.
Defective or clogged injection nozzle - Inspect nozzles and replace if necessary.
Fuel injection pump is damaged - Rebuild or change fuel pump.
Valve timing is out of adjustment - Correct or replace timing gear.
Fuel pipes are dirty - Clean or replace fuel pipes.
Injection timing is wrong - Set up as recommended.
Cylinder or piston rings are worn - Change faulty parts.
| Engine starts and immediately shuts off |
Dirty fuel filter - Replace the filter element.
Fuel injection pump malfunctioning - Repair or change injection pump.
Plugged air cleaner - Clean or replace element.
Nozzle opening pressure is incorrect - Adjust according to specifications.
| Engine stalls after running |
Improper setting of fuel injection pump timing - Adjust as recommended.
Fuel filter element is dirty - Service or replace the filter.
Coolant temperature is low - Engine is not warmed up to the required temperature.
Defective or stuck injection nozzles - Repair or replace injection nozzles.
| Engine stalls when idling |
Incorrectly set low idle speed - Adjust low idle speed.
Valve clearance is out of adjustment - Adjust valve clearance.
Fuel injection pump malfunctioning - Repair or replace injection pump.
Clogged or burnt injection nozzle - Check and replace nozzles if required.
Fuel hoses or lines clogging - Clean fuel system lines and hoses.
Air filter is dirty - Clean or change.
Leaking cylinder head gasket - Install new cylinder head gasket.
Injection timing is wrong - Set the injection timing correctly.
Fuel injection pump is damaged - Repair or change injection pump.
Any of moving engine parts is worn - Change or repair damaged parts.
Clogged radiator fins or damaged radiator cap - Clean radiator or change cap.
Lack of coolant in cooling system - Add coolant fluid to cooling system and also check it for leaks.
Excessive wear of the fan belt - Belt change is required.
Lack of engine oil - Add oil to the engine crankcase.
Cylinder-head gasket is leaking - Gasket should be replaced.
Injection timing is out of adjustment - Adjust as recommended.
Low crankcase oil level - Fill up the engine oil.
Oil pump malfunction - Inspect and change as required.
Dirty oil filter element - Service or replace engine oil filter.
Relief valve is stuck or broken - Change or clean relief valve.
Clearance of crankshaft bearing is excessive - Check and replace or repair defective parts.
Excessive crankpin bearing clearance - Inspect and change or repair worn components.
Oil leaking: Seals or gaskets are wearing excessively - Change to repair leaks.
Oil viscosity is incorrect - Use proper viscosity oil.
Worn or stuck piston rings - Change the piston rings as required.
Damaged valve stems or valve guides - Replace the valves.
Scored pistons or cylinder liners - Check pistons and liners, change as required.
Low coolant temperature - Normalize the temperature by warming up the engine.
Engine oil insufficient - Need to add engine oil.
Improper fuel injection timing - Set it up as required.
Broken or worn pistons - Have pistons replaced.
Connecting rod is not aligned or defective - Need to change or align the connecting rod.
Low battery power - Recharge the battery.
Battery drains quickly - Battery needs service or replacement.
Bad terminals or disconnected battery cables - Check cable connections and replace or service terminals.
Battery is low or faulty - Replace or charge as required.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Low battery capacity - Battery needs to be recharged.
Starter motor failure - Repair or replace starter.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Outboard Engines Technical Specifications |
