Cat C6.6 Troubleshooting
| Engine Model: Caterpillar C6.6 |
| Engine Type: 4-cycle 6-cylinder common-rail direct injection ADEM liquid-cooled diesel |
| Total Displacement: 403 cu.in (6.6 L) |
| Rated Engine Power: 125-250 Hp (93-186 kW) at 2200 rpm |
| Aspiration Type: Turbocharged |
____________________________________________________________________________________
| Engine starts hard or won't start |
Fuel filter element clogging - Change filter element.
Air trapped in fuel system - Bleed air.
Defective or clogged injection nozzle - Check and replace nozzles if required.
Fuel injection pump is broken - Replace injection pump or repair it.
Valve timing is improper - Use correct valve timing adjustment.
Dirt in the fuel lines or hoses - Service or replace fuel pipes.
Improper injection timing - Set up as recommended.
Cylinder or piston rings are worn - Replace defective components.
| Engine starts and immediately shuts off |
Fuel filter element is clogged - Clean or replace the filter.
Fuel injection pump damage - Replace injection pump or repair it.
Plugged air cleaner - Replace air filter element.
Unadjusted nozzle opening pressure - Set it correctly.
| Engine stops suddenly during operation |
Fuel injection timing is not adjusted - Use the correct fuel injection pump timing adjustment.
Fuel filter element is clogged - Change filter element.
Engine not warmed up - Warm up to required temperature.
Injection nozzles are jammed or clogged - Clean or replace injection nozzles.
| Engine stops while idling |
Incorrect low idle setting - Need to adjust idle speed.
Valve out of adjustment - Need to adjust valve clearance.
Defective fuel injection pump - Replace injection pump or repair it.
Fuel injection nozzles are faulty or clogged - Check and replace nozzles if required.
Fuel lines or hoses are clogged - Service fuel lines and hoses.
Air filter clogged - Install new air filter element.
Worn cylinder head gasket - Gasket should be replaced.
Improper injection timing - Use correct injection timing adjustment.
Fuel injection pump is faulty - Rebuild or change fuel pump.
Any of moving engine parts is worn - Repair or replace defective parts.
Dirty radiator fins or faulty radiator cap - Install new cap or clean radiator.
Low coolant level - The cooling system needs to be refilled and checked for faults.
Fan belt is worn or faulty - Change as required.
Low engine oil level - Need to add engine oil.
Defective cylinder head gasket - Replace the gasket as required.
Injection timing is wrong - Check injection timing adjustment.
| Oil pressure is insufficient |
Lack of oil - Need to add oil.
Oil pump is damaged - Repair or replace.
Oil filter element clogged - Replace or service engine oil filter.
Stuck or defective relief valve - Change or service relief valve.
Excessive oil clearance of crankshaft bearing - Inspect and replace or repair faulty parts.
Excessive oil clearance of crankpin bearing - Test and repair or replace worn parts.
| Engine oil consumption is too high |
Oil leaking: Gaskets or seals can be faulty - Change to repair leaks.
Oil viscosity is wrong - Use oil of correct viscosity.
Piston rings are stuck or worn - Piston rings replacement required.
Damaged valve stems or valve guides - Valves need to be changed.
Scored cylinder liners or pistons - Inspect pistons and liners, change as required.
| Abnormal engine noise or knocking |
Engine is not fully warmed up - Warm up to required temperature.
Engine oil insufficient - Fill the crankcase with engine oil.
Incorrect adjustment of fuel injection pump timing - Set the fuel pump timing correctly.
Worn or scored pistons - Pistons replacement required.
Misaligned or defective connecting rod - Connecting rod needs to be aligned or changed.
Low battery output - Battery is drained, recharge it.
Battery is not holding charge - Service charging system or change battery.
Bad terminals or disconnected battery cables - Check cables and service or change terminals.
Battery is discharged or worn - Replace or charge as required.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Battery power is low - Low battery charging, charge as required.
Starter motor failure - Starter should be changed.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Outboard Engines Technical Specifications |
