Cat C1.1 Troubleshooting
| Engine Model: Caterpillar C1.1 |
| Engine Type: 4-cycle inline 3-cylinder direct injection liquid-cooled diesel |
| Total Displacement: 69 cu.in (1.13 L) |
| Rated Engine Power: 16-28 Hp (12-21 kW) at 2500 rpm |
| Aspiration Type: Naturally aspirated |
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| Engine starts up hard or will not start |
Fuel filter element is clogged - Clean the filter or install new filter element.
Air in the fuel system - Air bleeding.
Fuel injection nozzles fault - Test injection nozzles and change if necessary.
Defective fuel injection pump - Rebuild or change fuel pump.
Valve timing is out of adjustment - Use correct valve timing adjustment.
Restricted fuel pipes - Service or replace fuel pipes.
Unadjusted injection timing - Adjust injection timing as required.
Excessive wear of piston rings and cylinder - Change defective parts.
| Diesel starts but then stops |
Fuel filter plugging - Replace the filter element.
Faulty fuel injection pump - Replace or repair injection pump.
Air filter is clogged - Change air filter element.
Unadjusted nozzle opening pressure - Set up as recommended.
| Engine stalls while running |
Wrong setting of fuel injection pump timing - Adjust according to specifications.
Fuel filter element clogging - Install new filter element.
Coolant temperature is low - Engine is not warmed up to the required temperature.
Injection nozzles are jammed or clogged - Change or repair injection nozzles.
Incorrectly set low idle speed - Correct the settings.
Incorrect valve clearance - Adjust valve clearance.
Fuel injection pump is defective - Replacement or repair required.
Defective or clogged injection nozzle - Change fuel injection nozzles.
Restricted fuel hoses or lines - Service fuel hoses and lines.
Air filter plugged - Change air filter element.
Worn cylinder head gasket - Replace cylinder head gasket.
Incorrect injection timing - Adjust as recommended.
Fuel injection pump is defective - Install a new fuel pump or repair.
One of moving engine parts has broken - Repair or replace defective components.
Defective radiator cap or clogged radiator fins - Replace cap or clean radiator.
Engine has a lack of coolant - Add coolant and check the components of cooling system.
Damaged or worn fan belt - Belt change is required.
Engine oil level is low - Checking oil level and add if necessary.
Cylinder head gasket defective - Cylinder-head gasket replacement required.
Wrong injection timing - Adjust injection timing as required.
Not enough oil in the engine - Add oil as required.
Oil pump failure - Remove and inspect oil pump.
Plugged engine oil filter - Replace or service engine oil filter.
Relief valve is stuck or broken - Change or service relief valve.
Excessive crankshaft bearing clearance - Check and replace or repair defective parts.
Crankpin bearing clearance is excessive - Test and replace or repair worn components.
| Diesel engine consuming too much oil |
Oil leakage: Seals or gaskets are defective - Defective components must be replaced.
Wrong oil viscosity - Use proper viscosity oil.
Piston rings are seized or worn - Install new piston rings.
Damaged valve stems or valve guides - Change the valves.
Cylinder liners or pistons are damaged - Check liners and pistons, change as required.
| Engine knocking sound or abnormal noise |
Low coolant temperature - Warm up engine as required.
Low engine oil level - Check oil level and add oil as required.
Wrong setting of fuel injection pump timing - Adjust as recommended.
Pistons are broken or worn - Pistons replacement required.
Connecting rod is defective or not aligned - Need to align or replace the connecting rod.
Low battery output voltage - Charge the battery.
Battery drains quickly - Service or change the battery.
Bad battery terminals or disconnected wiring - Connect wires correctly or change terminals.
| Starter motor is not working |
Battery is drained or worn - Change or recharge battery.
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed.
Low battery capacity - Charge the battery.
Starter motor failing - Starter needs to be changed.
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