Cat C15 ACERT Troubleshooting
| Engine Model: Caterpillar C15 ACERT |
| Engine Type: 4-stroke in-line 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 928 cu.in (15.2 L) |
| Rated Engine Power: 435-625 Hp (322-463 kW) at 2100 rpm |
| Fuel System Type: Unit Injection |
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| Engine hard to start or will not start |
Dirty fuel filter - Clean the filter element.
Air in fuel system - Bleed fuel system.
Fuel injection nozzles are damaged or dirty - Check and replace nozzles if required.
Fuel injection pump is defective - Repair or replace injection pump.
Incorrect valve timing - Use correct valve timing adjustment.
Fuel pipes clogging - Clean fuel pipes.
Injection timing is wrong - Set the injection timing correctly.
Cylinder or piston rings are worn - Replace defective components.
| Diesel starts and then shuts off |
Clogged fuel filter - Service the filter.
Fuel injection pump is not working correctly - Change pump or rebuild it.
Restricted intake air - Install new air filter element.
Incorrect nozzle opening pressure - Adjust as required.
| Engine stalls after running |
Wrong setting of fuel injection pump timing - Adjust according to specifications.
Fuel filter element clogging - Replace the filter element.
Low coolant temperature - Warm up to required temperature.
Stuck or burnt injection nozzle - Repair or replace injection nozzles.
Too low idle RPM - Need to adjust idle speed.
The valve clearance is not adjusted - Have it adjusted.
Faulty fuel injection pump - Replace or rebuild injection pump.
Fuel injection nozzles are dirty or defective - Service or change injection nozzles.
Dirt in the fuel hoses or lines - Fuel lines and hoses need to be cleaned.
Restricted intake air - Clean air cleaner element.
Cylinder head gasket defective - Replace the gasket as required.
Improper injection timing - Use correct injection timing adjustment.
Fuel injection pump malfunctioning - Install a new fuel pump or repair.
One of moving engine components has failed - Repair or replace defective components.
Clogged radiator fins or leaking radiator cap - Replace cap or clean radiator.
Low coolant level - Add coolant fluid to cooling system and also check it for leaks.
Fan belt slipping or worn - Belt replacement is recommended.
Low engine oil level - Check and refill engine oil.
Cylinder head gasket is blown - Change cylinder head gasket.
Injection timing is wrong - Check injection timing adjustment.
| Insufficient oil pressure |
Not enough oil in the engine - Add oil as required.
Worn oil pump - Repair or replace.
Dirty oil filter element - Replace or service engine oil filter.
Relief valve is stuck or worn - Change or clean relief valve.
Excessive crankshaft bearing clearance - Inspect and replace or repair faulty components.
Excessive oil clearance of crankpin bearing - Test and repair or replace worn parts.
| Engine consuming too much oil |
External oil leaks: Worn gaskets or seals - To repair leaks, replace worn parts.
Improper oil viscosity - Fill up with the correct oil viscosity.
Seized or wear piston rings - Have piston rings replaced.
Damaged valve stems or valve guides - Change the valves.
Worn pistons or cylinder liners - Check pistons and liners, change as required.
Coolant temperature is low - Normalize the temperature by warming up the engine.
Engine oil level is low - Check oil level and add oil as required.
Wrong setting of fuel injection pump timing - Use the correct fuel injection pump timing adjustment.
Broken or worn pistons - Pistons need to be replaced.
Misaligned or defective connecting rod - Replace or align connecting rod.
Low battery capacity - Charge the battery.
Battery discharges quickly - Service battery or change it.
Battery cables are disconnected or terminals are faulty - Connect cables properly or replace terminals.
Battery is drained or defective - Replace or charge as required.
Disconnected or improperly connected wiring harness - Inspect battery wiring harness and connect as required.
Battery capacity is low - Recharge the battery.
Damaged starter motor - Repair or change starter.
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