Cummins ISM11E5 Troubleshooting
| Engine Model: Cummins ISM11E5 |
| Engine Type: 4-cycle inline 6-cylinder HPCR direct injection liquid-cooled diesel |
| Total Displacement: 661 cu.in (10.8 L) |
| Rated Engine Power: 260-440 Hp (194-328 kW) at 2000 rpm |
| Aspiration Type: Turbocharged |
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| Engine hard to start or won't start |
Dirty fuel filter - Service the filter.
Air in fuel tank - Bleed fuel tank.
Damaged or dirty injection nozzles - Replace injection nozzles.
Fuel injection pump is not operating properly - Rebuild or install a new injection pump.
Valve timing is out of adjustment - Adjust or replace timing gear.
Clogged fuel pipes - Clean or change fuel pipes.
Injection timing is incorrect - Check injection timing adjustment.
Worn cylinder or piston rings - Replace faulty parts.
| Engine starts and stalls suddenly |
Fuel filter plugging - Clean or replace the filter.
Damaged fuel injection pump - Change pump or rebuild it.
Clogged air cleaner - Install new air filter element.
Nozzle opening pressure is improper - Adjust according to specifications.
| Engine stalls while running |
Improper fuel injection timing - Adjust as recommended.
Dirty fuel filter - Clean the filter element.
Engine is not preheated - Warm up to required temperature.
Stuck or clogged injection nozzle - Service or change injection nozzles.
| Engine stops while idling |
Too low idle RPM - Need to adjust idle speed.
Valve out of adjustment - Need to adjust valve clearance.
Faulty fuel injection pump - Change or repair the pump.
Fuel injection nozzles are faulty or clogged - Check injection nozzles and replace if required.
Restricted fuel hoses or lines - Clean fuel hoses and lines.
Dirty air filter - Replace air filter element.
Defective cylinder head gasket - Install new cylinder head gasket.
Unadjusted injection timing - Adjust according to specifications.
Fuel injection pump is defective - Change pump or rebuild it.
Any of moving engine parts is worn - Repair or replace defective parts.
Dirty radiator core or defective radiator cap - Install new cap or clean radiator.
Engine coolant is insufficient - Fill the cooling system and check components for leaks or other faults.
Broken or loose fan belt - Install new fan belt.
Engine oil level is low - Add oil to the engine crankcase.
Leaking cylinder head gasket - Install a new gasket.
Wrong injection timing - Set the injection timing correctly.
Insufficient engine oil - Add oil as required.
Defective oil pump - Inspect and change as required.
Dirty oil filter - Service or change engine oil filter element.
Relief valve is seized or worn - Replace or service relief valve.
Excessive crankshaft bearing clearance - Check and replace or repair defective parts.
Clearance of crankpin bearing is excessive - Inspect and replace or repair faulty parts.
| Engine using too much oil |
Oil leakage: Worn gaskets or seals - Change to repair leaks.
Crankcase oil too light - Fill up with the proper oil viscosity.
Piston rings are seized or worn - Have piston rings replaced.
Valve stems and guides are worn - Valves need to be changed.
Damaged cylinder liners or pistons - Check pistons and liners, change as required.
Coolant temperature is low - Engine is not warmed up to the required temperature.
Engine oil level is low - Add oil to the engine crankcase.
Improper fuel injection timing - Adjust fuel injection pump as required.
Pistons are worn or broken - Install new pistons.
Misaligned or defective connecting rod - Align or replace connecting rod.
Battery voltage is low - Battery is drained, charge it.
Battery discharges quickly - Service charging system or install new battery.
Faulty battery terminals or disconnected cables - Check wire connections and change or service terminals.
Battery is discharged or defective - Charge or replace the battery.
Wire harness is disconnected or incorrectly connected - Check wire harness and connect as required.
Low battery output - Recharge the battery.
Damaged starter motor - Starter should be replaced.
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