Kubota V1702 Troubleshooting
| Engine Model: Kubota V1702 |
| Engine Type: 4-cycle vertical 4-cylinder liquid-cooled diesel |
| Total Displacement: 106.7 cu.in (1.73 L) |
| Rated Engine Power: 40 Hp (29.8 kW) at 2800 rpm |
| Aspiration Type: Naturally aspirated |
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| Diesel hard to start or doesn't start |
Fuel filter plugging - Install new filter element.
Air in the fuel system - Air bleeding.
Clogged or burnt injection nozzle - Replace injection nozzles.
Damaged fuel injection pump - Replace injection pump or repair it.
Unadjusted valve timing - Use correct valve timing adjustment.
Restricted fuel pipes - Service or replace fuel pipes.
Unadjusted injection timing - Adjust according to specifications.
Damaged piston rings and cylinder - Change defective parts.
| Diesel starts and stalls immediately |
Fuel filter element is dirty - Install new filter element.
Fuel injection pump is not operating properly - Repair or replace injection pump.
Air filter element clogged - Carry out maintenance on air filter.
Incorrect nozzle opening pressure - Adjust according to specifications.
| Diesel shuts off while driving |
Improper setting of fuel injection pump timing - Adjust according to specifications.
Clogged fuel filter - Replace filter element.
Engine has not warmed up to the recommended temperature - Warm up engine as required.
Injection nozzles are stuck or clogged - Change or repair injection nozzles.
Incorrectly set low idle speed - Adjust as required.
Valve clearance is not correct - Adjust to proper valve clearance.
Fuel injection pump failure - Replace or repair injection pump.
| Diesel engine loses power |
Clogged injection nozzle - Service or change injection nozzles.
Clogged fuel lines or hoses - Clean fuel system lines and hoses.
Clogged air cleaner - Replace air filter element.
Cylinder head gasket is defective - Change cylinder head gasket.
Injection timing is improper - Adjust injection timing as required.
Fuel injection pump is damaged - Replacement or repair required.
One of moving engine components has failed - Change or repair damaged parts.
Dirty radiator fins or defective radiator cap - Install new cap or clean radiator.
Insufficient coolant fluid - Refill to the correct level and inspect system for leaks.
Fan belt is worn or faulty - If necessary, replace the belt.
Engine oil level is insufficient - Need to add engine oil.
Cylinder head gasket is blown - Replace the gasket as required.
Injection timing is improper - Adjust as recommended.
| Oil pressure is insufficient |
Not enough oil in the engine - Add oil as required.
Oil pump malfunction - Repair or change.
Dirty oil filter - Replace or clean engine oil filter element.
Stuck or worn relief valve - Replace or clean relief valve.
Crankshaft bearing clearance is excessive - Test and repair or replace worn parts.
Excessive oil clearance of crankpin bearing - Check and change or repair defective parts.
| Diesel engine consuming too much oil |
External oil leaks: Gaskets or seals may be damaged - Replace worn parts to avoid leaks.
Oil viscosity is wrong - Use correct viscosity oil.
Stuck or defective piston rings - Install new piston rings.
Valve stems or guides are damaged - Replace the valves.
Damaged pistons or cylinder liners - Inspect liners and pistons, fit new parts as necessary.
Engine is not warmed up to the required temperature - Warm up engine as required.
Engine oil level low - Fill up the engine oil.
Wrong setting of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Pistons are broken or worn - Install new pistons.
Connecting rod failure or misalignment - Align or replace connecting rod.
Battery capacity is low - Recharge the battery.
Battery is not holding charge - Service charging system or change battery.
Battery terminals are corroded or wires are disconnected - Check wire connections and change or service terminals.
Battery is discharged or defective - Battery needs to be recharged or replaced.
Disconnected or incorrectly connected wires - Inspect battery wires and connect correctly.
Low battery capacity - Battery is drained, recharge it.
Defective starter motor - Starter should be changed.
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