Cat 3606 Troubleshooting
| Engine Model: Caterpillar 3606 |
| Engine Type: 4-stroke inline 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 6,764 cu.in (110.8 L) |
| Rated Engine Power: 2000-2480 Hp (1490-1850 kW) at 1000 rpm |
| Fuel System Type: Unit Injector |
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| Engine difficult to start or doesn't start |
Fuel filter plugging - Service the filter.
Air in the fuel lines - Bleed the fuel lines.
Defective injection nozzle - Test injection nozzles and change if necessary.
Faulty fuel injection pump - Install a new fuel pump or repair.
Valve timing is wrong - Correct or change timing gear.
Fuel pipes are clogged - Clean or replace fuel pipes.
Injection timing is out of adjustment - Adjust according to specifications.
Cylinder or piston rings are worn - Replace faulty parts.
| Diesel starts but stalls immediately |
Clogged fuel filter - Change filter element.
Defective fuel injection pump - Rebuild or replace pump.
Plugged air filter - Change air filter element.
Nozzle opening pressure is incorrect - Adjust as required.
| Engine stalls during operation |
Wrong setting of fuel injection pump timing - Adjust fuel injection pump as required.
Clogged fuel filter - Service the filter.
Engine not warmed up - Warm up the engine.
Defective or stuck injection nozzles - Service or change injection nozzles.
| Engine shuts off while idling |
Low idle speed adjustment is incorrect - Correct the settings.
Excessive valve clearance - Correct valve clearance needs to be set.
Fuel injection pump failure - Repair or replace injection pump.
Fuel injection nozzles are faulty or clogged - Install a new kit of correctly balanced nozzles.
Fuel lines or hoses are clogged - Fuel hoses and lines must be clean.
Plugged air filter - Change air filter element.
Cylinder-head gasket is leaking - Install a new gasket.
Injection timing is incorrect - Set up as recommended.
Fuel injection pump failure - Rebuild or replace pump.
One of moving engine components has failed - Replace or repair damaged components.
Dirty radiator core or defective radiator cap - Clean radiator or install new cap.
Insufficient coolant fluid - Refill to the correct level and inspect system for leaks.
Fan belt slipping or worn - Belt replacement is recommended.
Not enough engine oil - Need to add engine oil.
Cylinder head gasket defective - Replace the gasket as required.
Incorrect injection timing - Use correct injection timing adjustment.
Low crankcase oil level - Fill the crankcase with oil.
Oil pump is worn or damaged - Repair or change.
Oil filter clogging - Service or change engine oil filter element.
Relief valve is defective or dirty - Replace or service relief valve.
Excessive oil clearance of crankshaft bearing - Test and replace or repair worn components.
Crankpin bearing clearance is excessive - Test and replace or repair worn components.
Oil leakage: Damaged seals or gaskets - Install new components.
Wrong oil viscosity - Use oil of correct viscosity.
Piston rings are defective or worn - Have piston rings replaced.
Worn valve guides and valve stems - Valves need to be changed.
Scored cylinder liners or pistons - Inspect liners and pistons, fit new parts as necessary.
| Abnormal engine noise or knocking |
Engine has not warmed up to the recommended temperature - Warm up engine as required.
Insufficient engine oil - Add oil to the engine crankcase.
Improper fuel injection timing - Adjust according to specifications.
Worn or scored pistons - Replace the pistons as required.
Misaligned or faulty connecting rod - Align or replace connecting rod.
Battery capacity is low - Recharge the battery.
Battery is not holding charge - Service battery or replace it.
Bad terminals or disconnected battery cables - Check wiring and clean or replace terminals.
Battery is discharged or worn - Recharge or replace battery.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Battery voltage is low - Low battery charging, charge as required.
Defective starter motor - Change or repair starter.
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