Perkins 403C-15 Troubleshooting
| Engine Model: Perkins 403C-15 |
| Engine Type: 4-cycle vertical 3-cylinder indirect injection liquid-cooled diesel |
| Total Displacement: 91 cu.in (1.49 L) |
| Rated Engine Power: 35 Hp (25.6 kW) at 3000 rpm |
| Aspiration Type: Naturally aspirated |
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| Engine starts up hard or won't start |
Fuel filter plugged - Change the filter element.
Air in the fuel pipes - Bleed the fuel pipes.
Damaged or dirty injection nozzles - Check and replace nozzles if required.
Damaged fuel injection pump - Replacement or repair required.
Incorrect valve timing - Use correct valve timing adjustment.
Dirt in the fuel lines or hoses - Clean or change fuel pipes.
Injection timing is incorrect - Adjust as recommended.
Cylinder or piston rings are worn - Change faulty components.
| Engine starts but stalls immediately |
Fuel filter plugged - Replace the filter element.
Faulty fuel injection pump - Replace or repair injection pump.
Clogged air filter - Clean or change.
Improper nozzle opening pressure - Adjust as recommended.
| Diesel shuts off while driving |
Incorrect adjustment of fuel injection pump timing - Adjust fuel injection pump as required.
Fuel filter plugging - Install new filter element.
Engine has not warmed up to the recommended temperature - Warm up the engine.
Defective or stuck injection nozzles - Repair or change injection nozzles.
| Engine stalls at low idle speed |
Low idle speed setting is not correct - Correct low idle settings.
Valve out of adjustment - Adjust to proper valve clearance.
Damaged fuel injection pump - Rebuild or change fuel pump.
Damaged or dirty injection nozzles - Service or change injection nozzles.
Clogged fuel hoses or lines - Clean fuel system hoses and lines.
Clogged air cleaner - Clean or change.
Blown cylinder head gasket - Cylinder-head gasket replacement required.
Injection timing is incorrect - Set up as recommended.
Fuel injection pump is faulty - Replacement or repair required.
One of moving engine components is worn - Change or repair damaged parts.
Dirty radiator fins or defective radiator cap - Clean radiator or replace cap.
Insufficient coolant - Fill radiator to proper level and check components for faults.
Damaged or worn fan belt - Fan belt must be replaced.
Not enough engine oil - Add oil to the engine crankcase.
Blown cylinder head gasket - Replace the gasket as required.
Injection timing is incorrect - Use correct injection timing adjustment.
| Oil pressure is insufficient |
Engine oil insufficient - Fill up the engine oil.
Oil pump malfunction - Inspect and change as required.
Oil filter is dirty - Service or replace 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.
Excessive oil clearance of crankpin bearing - Inspect and change or repair worn components.
| Excessive engine oil consumption |
Oil leaks: Damaged seals or gaskets - Worn parts need to be replaced.
Oil viscosity is incorrect - Fill up with the correct oil viscosity.
Stuck or defective piston rings - Change piston rings.
Valve guides or stems are damaged - Replace defective valves.
Scuffed pistons or cylinder liners - Inspect pistons and liners, replace as required.
| Abnormal engine noise or knocking |
Engine is cold - Warm up engine as required.
Engine oil insufficient - Add oil to the engine crankcase.
Wrong setting of fuel injection pump timing - Set the fuel pump timing correctly.
Scored or worn pistons - Replace the pistons.
Connecting rod is not aligned or defective - Need to align or replace the connecting rod.
Battery voltage is low - Battery is drained, recharge it.
Battery runs out quickly - Service battery or replace it.
Wires are disconnected or battery terminals are corroded - Check cable connections and change or clean terminals.
Battery is drained or worn - Charge or change the battery.
Battery wiring is disconnected or improperly connected - Inspect wiring and connect as required.
Battery power is low - Recharge the battery.
Defective starter motor - Starter needs to be replaced.
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