Cat 3306C Troubleshooting
| Engine Model: Caterpillar 3306C |
| Engine Type: 4-cycle inline 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 641 cu.in (10.5 L) |
| Rated Engine Power: 200-300 Hp (145-224 kW) at 2100 rpm |
| Fuel System Type: Direct fuel injection |
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| Engine starts hard or doesn't start |
Fuel filter element is dirty - Change the filter element.
Air in fuel tank - Bleed fuel tank.
Faulty fuel injection nozzles - Test injection nozzles and change if necessary.
Fuel injection pump is not working correctly - Change pump or rebuild it.
Improper valve timing - Correct or change timing gear.
Dirty fuel pipes - Service or change fuel pipes.
Injection timing is incorrect - Check injection timing adjustment.
Excessive wear of piston rings and cylinder - Change defective parts.
| Engine starts and stalls suddenly |
Dirty fuel filter - Install new filter element.
Faulty fuel injection pump - Replacement or repair required.
Clogged air filter element - Change air filter element.
Improper nozzle opening pressure - Set up as recommended.
| Engine stalls during operation |
Improper setting of fuel injection pump timing - Adjust fuel injection pump as required.
Fuel filter element is dirty - Replace filter element.
Engine is cold - Normalize the temperature by warming up the engine.
Defective or stuck injection nozzles - Change or repair injection nozzles.
Too low idle RPM - Correct the settings.
Incorrect valve clearance - Correct valve clearance needs to be set.
Fuel injection pump is defective - Replace or rebuild injection pump.
Dirty or faulty injection nozzles - Check injection nozzles and replace if required.
Fuel hoses or lines clogging - Clean fuel system hoses and lines.
Air filter element clogged - Replace air filter element.
Cylinder-head gasket is leaking - Cylinder-head gasket replacement required.
Injection timing is out of adjustment - Check injection timing adjustment.
Fuel injection pump is damaged - Replacement or repair required.
One of moving engine components is worn - Replace or repair damaged components.
Dirty radiator core or defective radiator cap - Clean radiator or change cap.
Engine has a lack of coolant - Refill to the correct level and inspect system for leaks.
Broken or loose fan belt - Belt replacement is recommended.
Insufficient engine oil - Fill the crankcase with engine oil.
Cylinder-head gasket is leaking - Gasket should be replaced.
Injection timing is incorrect - Adjust injection timing as required.
| Insufficient oil pressure |
Insufficient engine oil - Check oil level and add oil as required.
Oil pump failure - Install a new pump.
Oil filter is clogged - Replace or clean engine oil filter element.
Stuck or worn relief valve - Relief valve need to be replaced or cleaned.
Crankshaft bearing clearance is excessive - Test and repair or replace worn parts.
Clearance of crankpin bearing is excessive - Test and repair or replace worn parts.
| Engine using too much oil |
Oil leaks: Worn gaskets or seals - Replace to repair leaks.
Incorrect oil viscosity - Use correct viscosity oil.
Piston rings are stuck or broken - Replace piston rings.
Valve stems or guides are damaged - Valves must be replaced.
Scuffed cylinder liners or pistons - Inspect pistons and liners, fit new components as necessary.
Engine is cold - Warm up the engine.
Engine oil level low - Need to add engine oil.
Fuel injection pump timing is wrong - Set up as recommended.
Scored or worn pistons - Replace the pistons.
Connecting rod failure or misalignment - Need to change or align the connecting rod.
Low battery voltage - Charge the battery.
Battery is draining quickly - Service or replace the battery.
Terminals are faulty or battery cables are disconnected - Check battery wires and service or replace terminals.
| Starter motor is not working |
Battery is drained or defective - Battery needs to be recharged or replaced.
Disconnected or improperly connected wiring harness - Inspect battery wiring harness and connect as required.
Low battery capacity - Charge the battery.
Starter motor is faulty - Repair or replace starter.
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