John Deere 6619 Troubleshooting
| Engine Model: John Deere 6619 |
| Engine Type: 4-stroke in-line 6-cylinder liquid-cooled diesel |
| Total Displacement: 619 cu.in (10.1 L) |
| Rated Engine Power: 175-301 Hp (130-224 kW) at 2200 rpm |
| Fuel System Type: Direct injection |
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| Engine difficult to start or will not start |
Dirty fuel filter - Service the filter.
There is air in the fuel system - Bleed the system.
Fuel injection nozzles fault - Install a new kit of correctly balanced nozzles.
Fuel injection pump is not working correctly - Rebuild or change fuel pump.
Unadjusted valve timing - Set the valve timing correctly.
Restricted fuel pipes - Clean or replace fuel pipes.
Injection timing is out of adjustment - Set the injection timing correctly.
Damaged piston rings and cylinder - Change faulty parts.
| Diesel starts but stalls suddenly |
Fuel filter plugged - Filter maintenance required.
Fuel injection pump is defective - Repair or install a new fuel pump.
Air cleaner is dirty - Clean air cleaner element.
Improper nozzle opening pressure - Adjust as required.
| Engine shuts off while running |
Improper setting of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Fuel filter plugged - Clean the filter element.
Low coolant temperature - Warm up to required temperature.
Injection nozzles sticking or clogged - Check injection nozzles and replace if required.
| Engine stalls at low idle speed |
Too low idle RPM - Adjustment required.
Excessive valve clearance - Need to adjust valve clearance.
Fuel injection pump failure - Replace or rebuild injection pump.
Fuel injection nozzles are faulty or clogged - If necessary, replace with a new nozzle.
Restricted fuel hoses or lines - Clean fuel system hoses and lines.
Air filter element clogged - Clean or replace the element.
Cylinder-head gasket is broken - Install new cylinder head gasket.
Unadjusted injection timing - Set the injection timing correctly.
Faulty fuel injection pump - Change or repair the pump.
Any of moving engine parts is worn - Replace or repair damaged components.
Dirty radiator fins or faulty radiator cap - Install new cap or clean radiator.
Lack of engine coolant - Top up coolant fluid and check system for leaks.
Loose or defective fan belt - Replace as required.
Low engine oil level - Check and refill engine oil.
Damaged cylinder-head gasket - Install new cylinder head gasket.
Wrong injection timing - Adjust injection timing as required.
Engine oil level low - Add oil as required.
Defective oil pump - Check and replace if necessary.
Oil filter clogging - Replace or clean engine oil filter element.
Worn or dirty relief valve - Replace or service relief valve.
Clearance of crankshaft bearing is excessive - Inspect and replace or repair faulty components.
Clearance of crankpin bearing is excessive - Test and repair or replace worn parts.
| Excessive engine oil consumption |
Oil leakage: Damaged gaskets or seals - Change to repair leaks.
Incorrect oil viscosity - Fill up with the correct oil viscosity.
Stuck or worn piston rings - Have piston rings replaced.
Valve guides or stems are damaged - Valves must be replaced.
Pistons or cylinder liners are damaged - Inspect pistons and liners, replace as required.
Engine is cold - Warm up engine as required.
Insufficient engine oil - Need to add engine oil.
Timing of fuel injection pump is incorrect - Use the correct fuel injection pump timing adjustment.
Worn or broken pistons - Replace the pistons as required.
Connecting rod failure or misalignment - Need to align or replace the connecting rod.
Low battery voltage - Low battery charging, charge as required.
Battery runs out quickly - Service battery or replace it.
Disconnected battery cables or bad terminals - Connect wires properly or change terminals.
Battery is discharged or worn - Charge or change the battery.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Low battery voltage - Battery needs to be recharged.
Starter motor failing - Repair or replace starter.
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