Cat 3512B Troubleshooting
| Engine Model: Caterpillar 3512B |
| Engine Type: 4-cycle 12-cylinder direct injection liquid-cooled diesel |
| Total Displacement: 3160 cu.in (51.8 L) |
| Rated Engine Power: 1000-1800 Hp (746-1342 kW) at 1800 rpm |
| Aspiration Type: Turbocharged, aftercooled |
____________________________________________________________________________________
| Diesel engine hard to start or doesn't start |
Fuel filter plugging - Service or replace the filter.
Air trapped in fuel system - Bleed air.
Dirty or damaged injection nozzles - Install a new kit of correctly balanced nozzles.
Fuel injection pump malfunction - Replace injection pump or repair it.
Incorrect valve timing - Set the valve timing correctly.
Fuel pipes are dirty - Clean or replace fuel pipes.
Injection timing is out of adjustment - Set the injection timing correctly.
Worn piston rings and cylinder - Change defective parts.
| Diesel starts but immediately stops |
Fuel filter plugging - Change the filter element.
Defective fuel injection pump - Repair or install a new fuel pump.
Clogged air filter element - Install new air filter element.
Nozzle opening pressure is not adjusted - Set it correctly.
| Engine stops suddenly during operation |
Timing of fuel injection pump is incorrect - Use the correct fuel injection pump timing adjustment.
Fuel filter plugged - Replace filter element.
Low coolant temperature - Warm up the engine.
Stuck or clogged injection nozzle - Clean or replace injection nozzles.
Incorrect low idle setting - Test and adjust.
Improper valve clearance - Have it adjusted.
Fuel injection pump is not operating properly - Replace or rebuild injection pump.
Faulty fuel injection nozzles - Check and replace nozzles if required.
Clogged fuel hoses or lines - Clean fuel hoses and lines.
Dirty air cleaner - Replace air filter element.
Cylinder head gasket is worn - Install new cylinder head gasket.
Injection timing is out of adjustment - Adjust injection timing as required.
Fuel injection pump is faulty - Repair or install a new fuel pump.
One of moving engine components is worn - Repair or replace defective parts.
Clogged radiator core or leaking radiator cap - Clean radiator or replace cap.
Insufficient coolant fluid - Fill the cooling system and check components for leaks or other faults.
Fan belt is loose or defective - Replace the fan belt.
Engine oil level is low - Need to add engine oil.
Cylinder head gasket is defective - Gasket should be replaced.
Unadjusted injection timing - Adjust injection timing as required.
| Insufficient oil pressure |
Oil level is insufficient - Add oil to the engine crankcase.
Defective oil pump - Replace as required.
Oil filter element clogged - Change or service engine oil filter.
Relief valve is stuck or worn - Replace or clean relief valve.
Excessive oil clearance of crankshaft bearing - Check and change or repair defective parts.
Clearance of crankpin bearing is excessive - Test and repair or replace worn parts.
| High engine oil consumption |
Oil leakage: Worn gaskets or seals - Replace to repair leaks.
Wrong oil viscosity - Fill up with the correct oil viscosity.
Stuck or worn piston rings - Have piston rings replaced.
Valve stems or guides are damaged - Valves replacement required.
Pistons or cylinder liners are scored - Inspect liners and pistons, replace as necessary.
| Abnormal engine noise or knocking |
Engine is cold - Warm up engine as required.
Engine oil level is low - Check and refill engine oil.
Incorrect adjustment of fuel injection pump timing - Adjust the pump as required.
Pistons are scored or worn - Replace the pistons.
Connecting rod misalignment or failure - Replace or align connecting rod.
Battery capacity is low - Charge the battery.
Battery drains quickly - Service battery or replace it.
Disconnected wires or corroded battery terminals - Connect wiring correctly or install new terminals.
Battery is discharged or worn - Change or recharge battery.
Disconnected or incorrectly connected wires - Inspect battery wires and connect correctly.
Low battery voltage - Recharge the battery.
Faulty starter motor - Change or repair starter.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Outboard Engines Technical Specifications |
