Cummins ISC-330 Troubleshooting
| Engine Model: Cummins ISC-330 |
| Engine Type: 4-cycle 6-cylinder CAPS or common-rail fuel injection liquid-cooled diesel |
| Total Displacement: 505 cu.in (8.3 L) |
| Rated Engine Power: 330 Hp (246 kW) at 2200 rpm |
| Aspiration Type: Turbocharged and aftercooled |
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| Engine difficult to start or will not start |
Dirty fuel filter - Replace filter element.
There is air in the fuel system - Bleed the system.
Dirty or faulty injection nozzles - Install a new kit of correctly balanced nozzles.
Fuel injection pump is damaged - Rebuild or replace pump.
Valve timing is wrong - Correct or change timing gear.
Fuel pipes are plugged - Clean or replace fuel pipes.
Injection timing is wrong - Adjust as recommended.
Piston rings and cylinder are worn - Change faulty components.
| Diesel starts but immediately shuts off |
Fuel filter plugging - Replace filter element.
Faulty fuel injection pump - Rebuild or install a new injection pump.
Air filter element clogged - Carry out maintenance on air filter.
Improper nozzle opening pressure - Set it correctly.
| Engine stalls during operation |
Improper setting of fuel injection pump timing - Adjust the pump as required.
Fuel filter element clogging - Install new filter element.
Engine not warmed up - Warm up to required temperature.
Defective or stuck injection nozzles - Repair or change injection nozzles.
| Engine stalls while idling |
Too low idle RPM - Correct low idle adjustment.
Incorrect valve clearance - Have it adjusted.
Fuel injection pump is faulty - Change or repair the pump.
Fuel injection nozzles are damaged - Service or change injection nozzles.
Restricted fuel hoses or lines - Clean fuel lines and hoses.
Air filter plugged - Air filter maintenance required.
Cylinder-head gasket is leaking - Replace the gasket as required.
Injection timing is improper - Set the injection timing correctly.
Fuel injection pump is damaged - Rebuild or install a new injection pump.
One of moving engine parts has broken - Replace or repair damaged components.
Radiator fins are clogged or radiator cap is faulty - Replace cap or clean radiator.
Coolant level is low - Fill radiator to proper level and check components for faults.
Fan belt slipping or worn - Belt change is required.
Engine oil level low - Check and refill engine oil.
Cylinder head gasket is damaged - Gasket should be replaced.
Injection timing is improper - Check injection timing adjustment.
| Insufficient oil pressure |
Engine oil insufficient - Check and refill the oil.
Oil pump is defective - Replace as required.
Plugged engine oil filter - Replace or service engine oil filter.
Stuck or worn relief valve - Replace or service relief valve.
Clearance of crankshaft bearing is excessive - Test and repair or replace worn parts.
Excessive oil clearance of crankpin bearing - Inspect and replace or repair faulty components.
| Diesel engine using too much oil |
Oil leaking: Gaskets or seals may be damaged - Change to repair leaks.
Oil viscosity is incorrect - Use oil of proper viscosity.
Piston rings are seized or worn - Change piston rings.
Worn valve guides and valve stems - Valves replacement required.
Pistons or cylinder liners are scuffed - Check liners and pistons, replace as required.
Engine has not warmed up to the recommended temperature - Warm up the engine.
Engine oil level is insufficient - Checking oil level and add if necessary.
Fuel injection pump timing is wrong - Adjust the pump as required.
Piston wear or scoring - Replace the pistons.
Connecting rod is defective or misaligned - Connecting rod needs to be aligned or changed.
Low battery voltage - Battery is drained, recharge it.
Battery drains quickly - Service battery or change it.
Battery terminals are corroded or wires are disconnected - Check cables and clean or change terminals.
Battery is drained or worn - Replace or charge as required.
Battery wiring is disconnected or improperly connected - Inspect wiring and connect as required.
Battery capacity is low - Battery needs to be recharged.
Defective starter motor - Repair or replace starter.
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