John Deere 6090HFC47 Troubleshooting
| Engine Model: John Deere PowerTech Plus 6090HFC47 |
| Engine Type: 4-stroke in-line 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 549 cu.in (9.0 L) |
| Rated Engine Power: 250-375 Hp (187-280 kW) at 2200 rpm |
| Fuel System Type: Common Rail Direct Injection |
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| Engine starts up hard or will not start |
Dirty fuel filter - Replace the filter element.
Air in fuel tank - Bleed fuel tank.
Clogged injection nozzle - Clean or replace injection nozzles.
Fuel injection pump malfunctioning - Replace or rebuild injection pump.
Incorrect valve timing - Adjust or replace timing gear.
Plugged fuel pipes - Clean fuel pipes.
Injection timing is wrong - Adjust injection timing as required.
Damaged piston rings and cylinder - Change faulty parts.
| Diesel starts but immediately shuts off |
Fuel filter element clogging - Filter maintenance required.
Fuel injection pump is not working correctly - Replace or rebuild injection pump.
Air filter clogged - Carry out maintenance on air filter.
Nozzle opening pressure is improper - Adjust as recommended.
| Diesel shuts off while driving |
Timing of fuel injection pump is incorrect - Adjust fuel injection pump as required.
Fuel filter plugged - Change filter element.
Engine is not preheated - Warm up to required temperature.
Defective or stuck injection nozzles - Repair or change injection nozzles.
Improperly adjusted low idle speed - Correct the settings.
The valve clearance is not adjusted - Adjustment procedure required.
Defective fuel injection pump - Replace or repair injection pump.
| Diesel engine loses power |
Fuel injection nozzles are damaged or dirty - Change fuel injection nozzles.
Fuel hoses or lines are dirty - Service fuel lines and hoses.
Air filter plugged - Service air cleaner.
Cylinder head gasket defective - Install a new gasket.
Injection timing is improper - Adjust as recommended.
Fuel injection pump is faulty - Install a new pump or rebuild.
One of moving engine components is worn - Repair or replace defective parts.
Defective radiator cap or clogged radiator core - Clean radiator or change cap.
Engine has a lack of coolant - Add coolant and check the components of cooling system.
Fan belt is worn or faulty - Install new fan belt.
Engine oil insufficient - Fill up the oil to required level.
Cylinder head gasket is defective - Replace the gasket as required.
Wrong injection timing - Set the injection timing correctly.
Insufficient engine oil - Add oil to the engine crankcase.
Oil pump is damaged - Repair or replace.
Plugged engine oil filter - Service or replace engine oil filter.
Relief valve is defective or dirty - Replace or clean relief valve.
Excessive crankshaft bearing clearance - Inspect and change or repair worn components.
Clearance of crankpin bearing is excessive - Inspect and replace or repair faulty parts.
| Engine oil consumption is too high |
Oil leakage: Seals or gaskets are defective - Replace defective parts.
Oil viscosity is wrong - Use correct viscosity oil.
Piston rings are stuck or worn - Install new piston rings.
Damaged valve guides or valve stems - Change the valves.
Cylinder liners or pistons are damaged - Inspect pistons and liners, change as required.
Engine is not preheated - Engine is not warmed up to the required temperature.
Engine oil level is insufficient - Add oil to the engine crankcase.
Timing of fuel injection pump is incorrect - Adjust as recommended.
Scored or worn pistons - Pistons need to be replaced.
Faulty or misaligned connecting rod - Align or replace connecting rod.
Battery power is low - Battery needs to be recharged.
Battery drains quickly - Battery needs service or replacement.
Disconnected cables or faulty battery terminals - Check battery wires and service or replace terminals.
Battery is low or faulty - Battery needs to be recharged or replaced.
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed.
Battery power is low - Battery is drained, recharge it.
Starter motor failure - Starter should be changed.
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