________________________________________________________________________________________

Home / Engines / Kubota Engines / Kubota V1502

Kubota V1502 Troubleshooting

Engine Model: Kubota V1502
Engine Type: 4-stroke 4-cylinder water-cooled diesel engine
Total Displacement: 90.7 cu.in (1.5 L)
Rated Engine Power: 34 Hp (25.4 kW) at 2800 rpm
Fuel System: Indirect fuel injection

Engine hard to start or will not start

Fuel filter element is clogged - Replace the filter element.
Air in fuel tank - Bleed fuel tank.
Fuel injection nozzles are dirty or defective - If necessary, replace with a new nozzle.
Damaged fuel injection pump - Install a new fuel pump or repair.
Valve timing is improper - Correct or replace timing gear.
Restricted fuel pipes - Service or replace fuel pipes.
Wrong injection timing - Check injection timing adjustment.
Worn cylinder or piston rings - Change faulty components.

Diesel starts and stalls immediately

Fuel filter plugging - Clean the filter element.
Fuel injection pump malfunction - Repair or change injection pump.
Dirty air cleaner - Clean or replace the element.
Incorrect nozzle opening pressure - Set it correctly.

Engine stops running suddenly

Incorrect adjustment of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Fuel filter plugging - Clean the filter element.
Engine is not preheated - Engine is not warmed up to the required temperature.
Stuck or burnt injection nozzle - Repair or replace injection nozzles.

Engine stalls when idling

Incorrect low idle setting - Adjust low idling as recommended.
The valve clearance is not adjusted - Correct valve clearance.
Fuel injection pump damage - Repair or change injection pump.

Engine power is too low

Defective injection nozzle - If necessary, replace with a new nozzle.
Clogged fuel hoses or lines - Fuel lines and hoses need to be cleaned.
Dirty air filter - Change air filter element.
Defective cylinder head gasket - Install a new gasket.
Wrong injection timing - Adjust according to specifications.
Faulty fuel injection pump - Change pump or rebuild it.
Any of moving engine parts is worn - Change or repair damaged parts.

Engine is overheated

Clogged radiator core or damaged radiator cap - Install new cap or clean radiator.
Lack of engine coolant - Refill to the correct level and inspect system for leaks.
Damaged or worn fan belt - Belt replacement is recommended.
Engine oil insufficient - Check and refill engine oil.
Cylinder head gasket is defective - Replace the gasket as required.
Injection timing is out of adjustment - Set the injection timing correctly.

Insufficient oil pressure

Low oil level - Add oil to the engine crankcase.
Defective oil pump - Check and replace if necessary.
Oil filter is dirty - Clean or replace engine oil filter element.
Stuck or defective relief valve - Change or service relief valve.
Clearance of crankshaft bearing is excessive - Inspect and change or repair worn components.
Excessive crankpin bearing clearance - Inspect and change or repair worn components.

Excessive oil consumption

Oil leaks: Damaged seals or gaskets - Replace to repair leaks.
Improper oil viscosity - Use oil of proper viscosity.
Worn or broken piston rings - Piston rings replacement required.
Worn valve guides and valve stems - Valves need to be changed.
Cylinder liners or pistons are damaged - Inspect liners and pistons, change as necessary.

Abnormal engine noise or knocking

Engine is not warmed up to the required temperature - Warm up the engine.
Not enough engine oil - Add oil to the engine crankcase.
Fuel injection pump timing is not adjusted - Adjust as recommended.
Piston wear or scoring - Pistons need to be replaced.
Connecting rod is defective or misaligned - Alignment procedure or replacement is required.

Starter turns slowly

Low battery power - Recharge the battery.
Battery won’t hold charge - Service charging system or replace battery.
Terminals are faulty or battery cables are disconnected - Check cable connections and change or clean terminals.

Starter doesn't crank

Battery is drained or worn - Need to charge or replace the battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Battery voltage is low - Battery is drained, recharge it.
Damaged starter motor - Repair or change starter.

________________________________________________________________________________________

________________________________________________________________________________________

Engines Technical Specifications
BRIGGS 28S777 BRIGGS 31H777 BRIGGS 31P977 BRIGGS 31Q777
HONDA GC135 HONDA GCV160 HONDA GS190 HONDA GX340
KOHLER CH18S KOHLER CH680 KOHLER CV460S KOHLER SV735S
KUBOTA D1305 KUBOTA D1503 KUBOTA V1903 KUBOTA 2003T
MERCURY 150 MERCURY 175 XRI MARINER 135 MERCURY 200 EFI
KAWASAKI FH430V KAWASAKI FR600V KAWASAKI FX541V KAWASAKI FD611V
BMW M20B23 BMW M40B18 BMW M43B16 BMW M50B24TU
TOYOTA 3VZ-E TOYOTA 1AZ-FE TOYOTA 1G-FE TOYOTA 1JZ-GE
NISSAN HR12DE NISSAN A12 NISSAN A15 NISSAN CA18DET