John Deere 6068HL280 Troubleshooting
| Engine Model: John Deere PowerTech E 6068HL280 |
| Engine Type: 4-stroke in-line 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 415 cu.in (6.8 L) |
| Rated Engine Power: 130-137 Hp (97-102 kW) at 2300 rpm |
| Fuel System Type: Common Rail Direct Injection |
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| Diesel hard to start or doesn't start |
Dirty fuel filter - Change filter element.
Air trapped in fuel system - Bleed air.
Defective or clogged injection nozzle - Clean or replace injection nozzles.
Defective fuel injection pump - Replacement or repair required.
Valve timing is improper - Adjust or change timing gear.
Fuel pipes are clogged - Service or replace fuel pipes.
Injection timing is out of adjustment - Set up as recommended.
Worn cylinder or piston rings - Change faulty components.
| Engine starts but stops suddenly |
Clogged fuel filter - Replace filter element.
Fuel injection pump malfunction - Rebuild or change fuel pump.
Clogged air filter element - Clean air cleaner element.
Unadjusted nozzle opening pressure - Set it correctly.
| Engine stalls while running |
Fuel injection timing is wrong - Use the correct fuel injection pump timing adjustment.
Fuel filter element clogging - Replace the filter element.
Engine is not preheated - Normalize the temperature by warming up the engine.
Injection nozzles are burnt or jammed - Check injection nozzles and replace if required.
| Engine stops while idling |
Low idle speed setting is not correct - Correct low idle settings.
Valve out of adjustment - Adjust valve clearance according to specifications.
Fuel injection pump is faulty - Repair or replace injection pump.
| Engine power is insufficient |
Faulty fuel injection nozzles - Change fuel injection nozzles.
Dirty fuel hoses or lines - Service fuel hoses and lines.
Dirty air filter - Clean or replace the element.
Cylinder head gasket is defective - Cylinder-head gasket replacement required.
Wrong injection timing - Use correct injection timing adjustment.
Fuel injection pump is broken - Install a new pump or rebuild.
One of moving engine components is worn - Replace or repair damaged components.
Radiator core is dirty or radiator cap is damaged - Clean radiator or replace cap.
Insufficient coolant - The cooling system needs to be refilled and checked for faults.
Excessive wear of the fan belt - Belt change is required.
Low engine oil level - Check and refill engine oil.
Cylinder head gasket defective - Replace the gasket as required.
Improper injection timing - Adjust as recommended.
Low crankcase oil level - Add oil to the engine crankcase.
Oil pump is damaged - Repair or change.
Oil filter is dirty - Replace or clean engine oil filter element.
Relief valve is stuck or worn - Change or clean relief valve.
Clearance of crankshaft bearing is excessive - Check and replace or repair defective parts.
Clearance of crankpin bearing is excessive - Inspect and change or repair worn components.
| Excessive oil consumption |
Oil leakage: Damaged seals or gaskets - Install new components.
Crankcase oil too light - Use oil of correct viscosity.
Worn or stuck piston rings - Piston rings need to be replaced.
Valve stems and guides are worn - Valves replacement required.
Scuffed cylinder liners or pistons - Check pistons and liners, change as required.
Engine is not preheated - Warm up engine as required.
Insufficient engine oil - Fill up the engine oil.
Fuel injection pump timing is not adjusted - Set up as recommended.
Worn or broken pistons - Replace the pistons.
Connecting rod failure or misalignment - Replace or align connecting rod.
Low battery output voltage - Battery is drained, recharge it.
Battery is not holding charge - Service battery or change it.
Disconnected wiring or bad battery terminals - Connect wiring correctly or install new terminals.
Battery is discharged or worn - Change or recharge battery.
Battery wiring is disconnected or improperly connected - Inspect wiring and connect as required.
Low battery output - Charge the battery.
Starter motor is defective - Starter needs to be replaced.
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