Cat 3406C Troubleshooting
| Engine Model: Caterpillar 3406C |
| Engine Type: 4-cycle inline 6-cylinder turbocharged and aftercooled diesel |
| Total Displacement: 893 cu.in (14.6 L) |
| Rated Engine Power: 375-465 Hp (280-347 kW) at 2000 rpm |
| Fuel System Type: Electronic unit injector (EUI) |
____________________________________________________________________________________
| Engine hard to start or won't start |
Fuel filter plugged - Filter maintenance required.
Air in fuel tank - Bleed fuel tank.
Fuel injection nozzles are faulty or clogged - Test injection nozzles and change if necessary.
Fuel injection pump is not working correctly - Change pump or rebuild it.
Valve timing is incorrect - Adjust or change timing gear.
Fuel pipes clogging - Service or replace fuel pipes.
Injection timing is incorrect - Adjust as recommended.
Piston rings and cylinder are worn - Change faulty parts.
| Engine starts and stalls suddenly |
Dirty fuel filter - Filter maintenance required.
Fuel injection pump is damaged - Replace or repair injection pump.
Air filter is clogged - Carry out maintenance on air filter.
Improper nozzle opening pressure - Set it correctly.
| Engine stalls during operation |
Timing of fuel injection pump is incorrect - Adjust according to specifications.
Fuel filter plugged - Clean the filter element.
Engine is not fully warmed up - Normalize the temperature by warming up the engine.
Injection nozzles are jammed or clogged - Change or repair injection nozzles.
Too low idle RPM - Adjustment required.
Valve out of adjustment - Have it adjusted.
Fuel injection pump is faulty - Repair or replace injection pump.
| Diesel engine is losing power |
Fuel injection nozzles are clogged or faulty - Install a new kit of correctly balanced nozzles.
Fuel lines or hoses are clogged - Clean fuel system hoses and lines.
Dirty air filter element - Carry out maintenance on air filter.
Cylinder head gasket is blown - Cylinder-head gasket replacement required.
Injection timing is improper - Adjust according to specifications.
Fuel injection pump failure - Replace or repair injection pump.
One of moving engine components has failed - Replace or repair damaged components.
Radiator fins are dirty or radiator cap is defective - Replace cap or clean radiator.
Engine coolant is insufficient - Fill the cooling system and check components for leaks or other faults.
Loose or defective fan belt - Belt replacement is recommended.
Not enough engine oil - Add oil to the engine crankcase.
Cylinder head gasket is worn - Replace cylinder head gasket.
Unadjusted injection timing - Adjust according to specifications.
Low oil level - Check and refill the oil.
Worn oil pump - Inspect and change as required.
Clogged oil filter - Service or replace engine oil filter.
Stuck or worn relief valve - Replace or service relief valve.
Crankshaft bearing clearance is excessive - Check and replace or repair defective parts.
Clearance of crankpin bearing is excessive - Check and change or repair defective parts.
| Excessive engine oil consumption |
Oil leaks: Gaskets or seals can be faulty - Install new components.
Incorrect oil viscosity - Use correct viscosity oil.
Worn or stuck piston rings - Install new piston rings.
Valve stems and guides are worn - Replace the valves.
Damaged pistons or cylinder liners - Check pistons and liners, replace as required.
Low coolant temperature - Engine is not warmed up to the required temperature.
Engine oil insufficient - Checking oil level and add if necessary.
Timing of fuel injection pump is incorrect - Adjust according to specifications.
Scored or worn pistons - Pistons replacement required.
Connecting rod is defective or misaligned - Need to replace or align the connecting rod.
Low battery output - Charge the battery.
Battery runs out quickly - Service battery or change it.
Terminals are faulty or battery cables are disconnected - Connect wiring correctly or install new terminals.
| Starter motor is not working |
Battery is drained or defective - Change or recharge battery.
Wire harness is disconnected or incorrectly connected - Check wire harness and connect as required.
Battery capacity is low - Battery is drained, recharge it.
Damaged starter motor - Starter should be changed.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Car Engines Technical Specifications |
| Small Engines Technical Specifications |
| Outboard Engines Technical Specifications |
