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Kubota V1702 Troubleshooting
| Engine Model: Kubota V1702 |
| Engine Type: 4-stroke 4-cylinder water-cooled diesel engine |
| Total Displacement: 106.7 cu.in (1.7 L) |
| Rated Engine Power: 40 Hp (29.8 kW) at 2800 rpm |
| Fuel System: Indirect fuel injection |
| Engine starts hard or doesn't start |
Dirty fuel filter - Change filter element.
Air in fuel tank - Bleed fuel tank.
Fuel injection nozzles are faulty or clogged - Clean or change injection nozzles.
Fuel injection pump is not operating properly - Install a new fuel pump or repair.
Valve timing is wrong - Set the valve timing correctly.
Fuel pipes are clogged - Clean or change fuel pipes.
Injection timing is improper - Adjust injection timing as required.
Damaged piston rings and cylinder - Change faulty components.
| Diesel starts but immediately stops |
Fuel filter plugging - Service the filter.
Fuel injection pump damage - Replace injection pump or repair it.
Dirty air cleaner - Clean or change.
Unadjusted nozzle opening pressure - Adjust according to specifications.
| Engine stops running suddenly |
Wrong setting of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Clogged fuel filter - Clean the filter or install new filter element.
Coolant temperature is low - Warm up the engine.
Injection nozzles are stuck or clogged - Service or change injection nozzles.
| Engine stalls while idling |
Wrong adjustment of low idle speed - Adjust the low idle speed.
Excessive valve clearance - Adjust valve clearance according to specifications.
Defective fuel injection pump - Replace or repair injection pump.
Clogged injection nozzle - If necessary, replace with a new nozzle.
Fuel lines or hoses are clogged - Fuel hoses and lines must be clean.
Dirty air filter element - Replace air filter element.
Worn cylinder head gasket - Replace the gasket as required.
Improper injection timing - Use correct injection timing adjustment.
Fuel injection pump is defective - Repair or replace injection pump.
One of moving engine components has failed - Repair or replace defective parts.
Radiator core is clogged or radiator cap is leaking - Replace cap or clean radiator.
Lack of engine coolant - Add coolant fluid to cooling system and also check it for leaks.
Broken or loose fan belt - If necessary, replace the belt.
Engine oil level is low - Fill up the engine oil.
Defective cylinder head gasket - Cylinder-head gasket replacement required.
Unadjusted injection timing - Adjust according to specifications.
Lack of oil - Add oil as required.
Defective oil pump - Remove and inspect oil pump.
Oil filter element clogged - Clean or replace engine oil filter element.
Relief valve is stuck or worn - Relief valve need to be replaced or cleaned.
Crankshaft bearing clearance is excessive - Test and repair or replace worn parts.
Excessive crankpin bearing clearance - Test and repair or replace worn parts.
| Diesel engine consuming too much oil |
Oil leaks: Gaskets or seals may be damaged - Replace defective parts.
Improper oil viscosity - Use oil of proper viscosity.
Piston rings are defective or worn - Piston rings replacement required.
Valve guides and stems are worn - Replace defective valves.
Worn cylinder liners or pistons - Inspect pistons and liners, change as required.
| Engine knocking sound or abnormal noise |
Low coolant temperature - Warm up the engine.
Not enough engine oil - Fill up the oil to required level.
Fuel injection pump timing is wrong - Use the correct fuel injection pump timing adjustment.
Piston wear or scoring - Have pistons replaced.
Connecting rod is defective or misaligned - Need to align or replace the connecting rod.
Battery power is low - Battery needs to be recharged.
Battery drains quickly - Service or change the battery.
Battery cables are disconnected or terminals are faulty - Check wiring and clean or replace terminals.
Battery is drained or worn - Charge or change the battery.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Low battery power - Battery is drained, recharge it.
Starter motor is damaged - Replace or repair starter.
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