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| Home / Engines / Kubota Engines / Kubota D1703 |
Kubota D1703 Troubleshooting
| Engine Model: Kubota D1703 |
| Engine Type: 4-cycle vertical 3-cylinder water-cooled diesel engine |
| Total Displacement: 100.5 cu.in (1.7 L) |
| Rated Engine Power: 34.5 Hp (25.7 kW) at 3000 rpm |
| Fuel System: Indirect fuel injection |
| Engine hard to start or won't start |
Clogged fuel filter - Replace filter element.
Air in fuel system - Bleed fuel system.
Faulty fuel injection nozzles - Change fuel injection nozzles.
Fuel injection pump is not working correctly - Rebuild or replace pump.
Valve timing is improper - Adjust or change timing gear.
Restricted fuel pipes - Clean or change fuel pipes.
Wrong injection timing - Use correct injection timing adjustment.
Damaged piston rings and cylinder - Replace defective parts.
| Engine stalls after starting |
Clogged fuel filter - Replace filter element.
Fuel injection pump is not operating properly - Replacement or repair required.
Clogged air filter - Install new air filter element.
Incorrect nozzle opening pressure - Set up as recommended.
| Engine shuts off while running |
Wrong setting of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Dirty fuel filter - Replace filter element.
Engine is cold - Warm up engine as required.
Injection nozzles sticking or clogged - Repair or change injection nozzles.
| Engine stalls when idle |
Too low idle RPM - Adjust low idle speed.
Valve clearance is wrong - Check and adjust as required.
Fuel injection pump malfunctioning - Rebuild or replace pump.
| Reduced engine power |
Defective injection nozzle - If necessary, replace with a new nozzle.
Fuel hoses or lines are dirty - Fuel lines and hoses need to be cleaned.
Restricted intake air - Carry out maintenance on air filter.
Cylinder head gasket is blown - Install a new gasket.
Improper injection timing - Use correct injection timing adjustment.
Fuel injection pump is faulty - Change pump or rebuild it.
One of moving engine parts is faulty - Replace or repair damaged components.
| Engine overheats |
Radiator core is dirty or radiator cap is damaged - Clean radiator or change cap.
Insufficient coolant fluid - Refill to the correct level and inspect system for leaks.
Damaged or worn fan belt - Change as required.
Not enough engine oil - Add oil to the engine crankcase.
Cylinder head gasket is damaged - Install new cylinder head gasket.
Injection timing is wrong - Set the injection timing correctly.
| Oil pressure too low |
Engine oil insufficient - Check and refill the oil.
Oil pump is damaged - Repair or replace.
Oil filter element is dirty - Replace or service engine oil filter.
Stuck or worn relief valve - Replace or service relief valve.
Crankshaft bearing clearance is excessive - Test and replace or repair worn components.
Clearance of crankpin bearing is excessive - Check and change or repair defective parts.
| Excessive oil consumption |
External oil leaks: Seals or gaskets are wearing excessively - Change worn parts according to specifications.
Improper oil viscosity - Fill up with the proper oil viscosity.
Piston rings are stuck or worn - Piston rings need to be replaced.
Damaged valve guides or valve stems - Replace the valves.
Damaged pistons or cylinder liners - Check pistons and liners, change as required.
| Engine knocking or noise |
Engine is not warmed up to the required temperature - Warm up engine as required.
Insufficient engine oil - Need to add engine oil.
Timing of fuel injection pump is incorrect - Use the correct fuel injection pump timing adjustment.
Worn or broken pistons - Install new pistons.
Connecting rod is misaligned or defective - Connecting rod needs to be aligned or changed.
| Starter turns slowly |
Battery power is low - Charge the battery.
Battery drains quickly - Service charging system or change battery.
Disconnected wires or corroded battery terminals - Connect wiring properly or install new terminals.
| Starter motor is not working |
Battery is drained or worn - Recharge or change battery.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Low battery output - Battery needs to be recharged.
Starter motor is damaged - Repair or install a new starter.
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