Cat 3406E Troubleshooting
| Engine Model: Caterpillar 3406E |
| Engine Type: 4-cycle inline 6-cylinder direct injection EUI ADEM liquid-cooled diesel |
| Total Displacement: 893 cu.in (14.6 L) |
| Rated Engine Power: 300-550 Hp (224-410 kW) at 2000 rpm |
| Aspiration Type: Turbocharged |
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| Engine difficult to start or doesn't start |
Fuel filter element is dirty - Service or replace the filter.
Air in fuel tank - Bleed fuel tank.
Defective or clogged injection nozzle - Check injection nozzles and replace if required.
Fuel injection pump malfunctioning - Install a new pump or rebuild.
Incorrect valve timing - Adjust or replace timing gear.
Restricted fuel pipes - Clean fuel pipes.
Improper injection timing - Adjust injection timing as required.
Piston rings and cylinder are worn - Replace defective parts.
| Engine starts and stops suddenly |
Clogged fuel filter - Change filter element.
Fuel injection pump is not operating properly - Repair or install new pump.
Air filter is clogged - Service air cleaner.
Nozzle opening pressure is incorrect - Adjust according to specifications.
| Engine stalls during operation |
Improper setting of fuel injection pump timing - Adjust fuel injection pump as required.
Fuel filter element is dirty - Clean the filter element.
Engine is not preheated - Warm up the engine.
Injection nozzles sticking or clogged - Clean or change injection nozzles.
| Engine stalls at low idle speed |
Incorrect low idle speed adjustment - Adjustment required.
Incorrect valve clearance - Check and adjust.
Fuel injection pump damage - Repair or install new pump.
Fuel injection nozzles are damaged - Change fuel injection nozzles.
Fuel hoses or lines are dirty - Fuel lines and hoses need to be cleaned.
Dirty air cleaner - Replace air filter element.
Damaged cylinder-head gasket - Replace the gasket as required.
Unadjusted injection timing - Adjust according to specifications.
Fuel injection pump is faulty - Replacement or repair required.
One of moving engine components is worn - Repair or replace defective parts.
Clogged radiator fins or leaking radiator cap - Replace cap or clean radiator.
Lack of engine coolant - Fill radiator to proper level and check components for faults.
Fan belt is loose or defective - Replace the fan belt.
Lack of engine oil - Fill up the engine oil.
Cylinder-head gasket is broken - Gasket should be replaced.
Unadjusted injection timing - Set up as recommended.
| Insufficient oil pressure |
Oil level is insufficient - Checking oil level and add if necessary.
Oil pump is worn or damaged - Install a new pump.
Oil filter element clogged - Replace or clean engine oil filter element.
Stuck or worn relief valve - Change or clean relief valve.
Excessive crankshaft bearing clearance - Inspect and change or repair worn components.
Crankpin bearing clearance is excessive - Test and repair or replace worn parts.
| Engine oil consumption is too high |
External oil leaks: Worn gaskets or seals - Replace worn parts to avoid leaks.
Oil viscosity is wrong - Fill up with the correct oil viscosity.
Damaged or seized piston rings - Change the piston rings as required.
Valve stems and guides are worn - Valves need to be changed.
Scored cylinder liners or pistons - Check liners and pistons, replace as required.
Engine is cold - Warm up to required temperature.
Engine oil insufficient - Checking oil level and add if necessary.
Improper setting of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Worn or broken pistons - Pistons replacement required.
Connecting rod is defective or not aligned - Alignment procedure or replacement is required.
Battery power is low - Charge the battery.
Battery won’t hold charge - Battery needs to be serviced or replaced.
Bad terminals or disconnected battery cables - Check wiring and clean or replace terminals.
Battery is drained or defective - Change or recharge battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Battery capacity is low - Charge the battery.
Starter motor is damaged - Replace or repair starter.
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