Cummins ISC-285 Troubleshooting
| Engine Model: Cummins ISC-285 |
| 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: 285 Hp (213 kW) at 2200 rpm |
| Aspiration Type: Turbocharged and aftercooled |
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| Engine starts up hard or will not start |
Fuel filter plugging - Service the filter.
Air trapped in fuel system - Bleed air.
Fuel injection nozzles fault - If necessary, replace with a new nozzle.
Defective fuel injection pump - Rebuild or change fuel pump.
Improper valve timing - Set the valve timing correctly.
Plugged fuel pipes - Clean or change fuel pipes.
Wrong injection timing - Set up as recommended.
Excessive wear of piston rings and cylinder - Change faulty parts.
| Engine starts and immediately shuts off |
Fuel filter element clogging - Clean the filter or install new filter element.
Damaged fuel injection pump - Rebuild or replace pump.
Dirty air cleaner - Change air filter element.
Nozzle opening pressure is not adjusted - Adjust according to specifications.
| Engine shuts off suddenly during operation |
Wrong setting of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Dirty fuel filter - Clean the filter element.
Engine is cold - Warm up engine as required.
Injection nozzles are burnt or jammed - Service or change injection nozzles.
Low idle speed set incorrectly - Adjust low idle speed.
Valve clearance is not correct - Have it adjusted.
Fuel injection pump malfunction - Replace or repair injection pump.
| Engine power is insufficient |
Defective injection nozzle - Test injection nozzles and change if necessary.
Fuel hoses or lines clogging - Clean fuel hoses and lines.
Intake air restriction - Service air cleaner.
Damaged cylinder-head gasket - Replace the gasket as required.
Injection timing is incorrect - Adjust according to specifications.
Fuel injection pump is broken - Repair or change injection pump.
One of moving engine components is worn - Repair or replace defective parts.
Damaged radiator cap or dirty radiator core - Clean radiator or change cap.
Not enough coolant - Fill radiator to proper level and check components for faults.
Fan belt is broken or worn - Change the fan belt.
Insufficient engine oil - Checking oil level and add if necessary.
Worn cylinder head gasket - Cylinder-head gasket replacement required.
Wrong injection timing - Adjust according to specifications.
Insufficient engine oil - Fill crankcase to proper oil level.
Oil pump is damaged - Remove and inspect oil pump.
Oil filter clogging - Change or clean engine oil filter element.
Relief valve is defective or dirty - Change or service relief valve.
Clearance of crankshaft bearing is excessive - Check and replace or repair defective parts.
Clearance of crankpin bearing is excessive - Check and replace or repair defective parts.
| Excessive engine oil consumption |
Oil leaks: Worn seals or gaskets - New components need to be installed.
Improper oil viscosity - Use oil of proper viscosity.
Seized or wear piston rings - Install new piston rings.
Damaged valve stems or valve guides - Valves replacement required.
Scuffed pistons or cylinder liners - Inspect liners and pistons, fit new parts as necessary.
Engine has not warmed up to the recommended temperature - Warm up engine as required.
Not enough engine oil - Check oil level and add oil as required.
Timing of fuel injection pump is incorrect - Adjust as recommended.
Piston wear or scoring - Install new pistons.
Connecting rod misalignment or failure - Need to replace or align the connecting rod.
Low battery output voltage - Battery is drained, recharge it.
Battery will not hold charge - Service charging system or change battery.
Terminals are faulty or battery cables are disconnected - Check cable connections and change or clean 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 power is low - Battery is drained, recharge it.
Defective starter motor - Replace or repair starter.
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