John Deere 6090HFG86 Troubleshooting
| Engine Model: John Deere PowerTech E 6090HFG86 |
| Engine Type: 4-stroke in-line 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 549 cu.in (9.0 L) |
| Rated Engine Power: 463 Hp (345 kW) at 1800 rpm |
| Fuel System Type: Common Rail Direct Injection |
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| Engine starts up hard or will not start |
Clogged fuel filter - Change the filter element.
Air in fuel system - Bleed fuel system.
Fuel injection nozzles are dirty or defective - Install a new kit of correctly balanced nozzles.
Fuel injection pump is defective - Install a new fuel pump or repair.
Valve timing is improper - Correct or change timing gear.
Fuel pipes clogging - Clean fuel pipes.
Incorrect injection timing - Check injection timing adjustment.
Damaged piston rings and cylinder - Change faulty parts.
| Engine starts and stalls suddenly |
Fuel filter plugging - Change filter element.
Damaged fuel injection pump - Repair or install new pump.
Restricted intake air - Service air cleaner.
Nozzle opening pressure is not adjusted - Adjust as required.
| Engine stalls while running |
Fuel injection timing is wrong - Adjust as recommended.
Fuel filter element is dirty - Clean or replace the filter.
Engine is cold - Normalize the temperature by warming up the engine.
Injection nozzles sticking or clogged - Check injection nozzles and replace if required.
Low idle speed setting is not correct - Normalize low idle speed.
Valve clearance is out of adjustment - Have it adjusted.
Fuel injection pump is not working correctly - Rebuild or change fuel pump.
Clogged injection nozzle - Inspect nozzles and replace if necessary.
Fuel hoses or lines are dirty - Service fuel hoses and lines.
Clogged air filter - Service or replace the air filter.
Defective cylinder head gasket - Install new cylinder head gasket.
Improper injection timing - Adjust according to specifications.
Faulty fuel injection pump - Replace or repair injection pump.
One of moving engine components is worn - Replace or repair damaged components.
Dirty radiator core or faulty radiator cap - Clean radiator or replace cap.
Engine has a lack of coolant - Fill radiator to proper level and check components for faults.
Excessive wear of the fan belt - Install new fan belt.
Insufficient engine oil - Check oil level and add oil as required.
Cylinder head gasket defective - Change cylinder head gasket.
Injection timing is wrong - Set up as recommended.
Oil level is low - Add oil to the engine crankcase.
Worn oil pump - Install a new pump.
Oil filter clogged - Clean or replace engine oil filter element.
Relief valve is stuck or worn - Change or service relief valve.
Crankshaft bearing clearance is excessive - Check and change or repair defective parts.
Excessive crankpin bearing clearance - Check and change or repair defective parts.
| Excessive oil consumption |
External oil leaks: Defective seals or gaskets - New components need to be installed.
Incorrect oil viscosity - Fill up with the correct oil viscosity.
Stuck or defective piston rings - Change piston rings.
Valve stems or guides are damaged - Valves must be replaced.
Worn cylinder liners or pistons - Inspect pistons and liners, change as required.
Coolant temperature is low - Warm up the engine.
Engine oil level low - Add oil to the engine crankcase.
Improper fuel injection timing - Adjust fuel injection pump as required.
Worn or broken pistons - Pistons need to be replaced.
Connecting rod is misaligned or worn - Connecting rod needs to be replaced or aligned.
Low battery output voltage - Battery is drained, charge it.
Battery is not holding charge - Service or replace the battery.
Corroded battery terminals or disconnected wires - Connect wiring correctly or install new terminals.
Battery is drained or defective - Recharge or change battery.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Low battery voltage - Charge the battery.
Faulty starter motor - Starter needs to be changed.
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