Cat 3408E Troubleshooting
| Engine Model: Caterpillar 3408E |
| Engine Type: 4-cycle 8-cylinder turbocharged and aftercooled diesel |
| Total Displacement: 1099 cu.in (18.0 L) |
| Rated Engine Power: 400-550 Hp (300-407 kW) at 2100 rpm |
| Fuel System Type: Electronic unit injector (EUI) |
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| Engine hard to start or will not start |
Fuel filter element clogging - Change filter element.
Air in the fuel system - Air bleeding.
Clogged or defective injection nozzles - If necessary, replace with a new nozzle.
Fuel injection pump is defective - Change pump or rebuild it.
Valve timing is out of adjustment - Correct or change timing gear.
Restricted fuel pipes - Clean fuel pipes.
Improper injection timing - Check injection timing adjustment.
Cylinder or piston rings are worn - Change faulty parts.
| Diesel starts and then shuts off |
Clogged fuel filter - Replace the filter element.
Fuel injection pump is defective - Repair or install new pump.
Clogged air filter - Clean air cleaner element.
Incorrect nozzle opening pressure - Adjust as required.
| Engine stops running suddenly |
Incorrect adjustment of fuel injection pump timing - Adjust as recommended.
Fuel filter plugged - Replace the filter element.
Engine is not warmed up to the required temperature - Warm up to required temperature.
Injection nozzles are stuck or clogged - Clean or change injection nozzles.
Low idle speed adjustment is incorrect - Adjust low idling as recommended.
Excessive valve clearance - Adjustment procedure required.
Fuel injection pump is defective - Rebuild or install a new injection pump.
Fuel injection nozzles are faulty or clogged - Test injection nozzles and change if necessary.
Dirty fuel lines or hoses - Fuel hoses and lines must be clean.
Plugged air cleaner - Carry out maintenance on air filter.
Damaged cylinder-head gasket - Cylinder-head gasket replacement required.
Improper injection timing - Adjust injection timing as required.
Fuel injection pump is defective - Repair or install new pump.
One of moving engine parts is faulty - Change or repair damaged parts.
Clogged radiator core or damaged radiator cap - Change cap or clean radiator.
Engine coolant is insufficient - Fill radiator to proper level and check components for faults.
Fan belt slipping or worn - The fan belt needs to be replaced.
Lack of engine oil - Check and refill engine oil.
Worn cylinder head gasket - Cylinder-head gasket replacement required.
Injection timing is out of adjustment - Check injection timing adjustment.
Oil level is low - Fill crankcase to proper oil level.
Oil pump is damaged - Replace as required.
Dirty oil filter element - Change or service engine oil filter.
Relief valve is seized or worn - Change or service relief valve.
Clearance of crankshaft bearing is excessive - Test and repair or replace worn parts.
Excessive oil clearance of crankpin bearing - Test and repair or replace worn parts.
| Engine consuming too much oil |
Oil leaking: Defective seals or gaskets - To repair leaks, replace worn parts.
Incorrect oil viscosity - Use proper viscosity oil.
Piston rings are seized or worn - Have piston rings replaced.
Damaged valve guides or valve stems - Change the valves.
Cylinder liners or pistons are scored - Check pistons and liners, replace as required.
Low coolant temperature - Warm up to required temperature.
Lack of engine oil - Checking oil level and add if necessary.
Fuel injection pump timing is wrong - Set it up as required.
Pistons are scored or worn - Pistons replacement required.
Connecting rod misalignment or failure - Need to align or replace the connecting rod.
Low battery capacity - Battery is drained, charge it.
Battery will not hold charge - Battery needs service or replacement.
Faulty battery terminals or disconnected cables - Connect wiring properly or install new terminals.
Battery is low or faulty - Recharge or replace battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery power - Battery is drained, charge it.
Starter motor is defective - Repair or change starter.
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