John Deere 6068HF275 Troubleshooting
| Engine Model: John Deere PowerTech 6068HF275 |
| Engine Type: 4-stroke in-line 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 415 cu.in (6.8 L) |
| Rated Engine Power: 173-282 Hp (129-210 kW) at 1800-2400 rpm |
| Fuel System Type: Direct Injection |
____________________________________________________________________________________
| Engine starts hard or will not start |
Fuel filter plugging - Replace filter element.
Air in the fuel system - Air bleeding.
Defective injection nozzle - Install a new kit of correctly balanced nozzles.
Fuel injection pump malfunctioning - Install a new fuel pump or repair.
Unadjusted valve timing - Adjust or change timing gear.
Dirt in the fuel lines or hoses - Clean fuel pipes.
Unadjusted injection timing - Set up as recommended.
Worn piston rings and cylinder - Replace defective parts.
| Engine starts but then stalls |
Fuel filter plugged - Replace the filter element.
Faulty fuel injection pump - Rebuild or change fuel pump.
Dirty air filter element - Clean or change the filter.
Nozzle opening pressure is improper - Set up as recommended.
| Engine stops running suddenly |
Fuel injection timing is not adjusted - Adjust the pump as required.
Clogged fuel filter - Service or replace the filter.
Engine has not warmed up to the recommended temperature - Warm up the engine.
Injection nozzles sticking or clogged - Clean or change injection nozzles.
| Engine stalls at low idle speed |
Improperly adjusted low idle speed - Adjust as required.
Valve out of adjustment - Adjustment procedure required.
Fuel injection pump is not working correctly - Change pump or rebuild it.
Fuel injection nozzles are damaged or dirty - Check and replace nozzles if required.
Dirty fuel hoses or lines - Clean fuel hoses and lines.
Clogged air filter element - Service or replace the air filter.
Cylinder head gasket is worn - Replace the gasket as required.
Incorrect injection timing - Set up as recommended.
Fuel injection pump is defective - Change or repair the pump.
Any of moving engine parts is worn - Repair or replace defective parts.
Damaged radiator cap or dirty radiator core - Clean radiator or replace cap.
Coolant level is low - Fill the cooling system and check components for leaks or other faults.
Fan belt is worn or faulty - Change as required.
Engine oil insufficient - Check oil level and add oil as required.
Damaged cylinder-head gasket - Install new cylinder head gasket.
Improper injection timing - Set the injection timing correctly.
Low oil level - Fill crankcase to proper oil level.
Oil pump malfunction - Inspect and change as required.
Plugged engine oil filter - Replace or service engine oil filter.
Stuck or defective relief valve - Change or clean relief valve.
Clearance of crankshaft bearing is excessive - Inspect and replace or repair faulty parts.
Clearance of crankpin bearing is excessive - Test and replace or repair worn components.
| Engine oil consumption is too high |
External oil leaks: Worn seals or gaskets - To repair leaks, replace worn parts.
Wrong oil viscosity - Use proper viscosity oil.
Piston rings are seized or worn - Change piston rings.
Worn valve guides and valve stems - Valves need to be changed.
Pistons or cylinder liners are worn - Inspect pistons and liners, fit new components as necessary.
Coolant temperature is low - Warm up to required temperature.
Engine oil level is insufficient - Add oil to the engine crankcase.
Fuel injection pump timing is not adjusted - Adjust the pump as required.
Pistons are worn or scored - Have pistons replaced.
Misaligned or defective connecting rod - Connecting rod needs to be aligned or changed.
Low battery voltage - Low battery charging, charge as required.
Battery will not hold charge - Service or replace the battery.
Bad terminals or disconnected battery cables - Connect wires properly or change terminals.
Battery is low or faulty - Battery needs to be recharged or replaced.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Battery voltage is low - Recharge the battery.
Damaged starter motor - Replace or repair starter.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Car Engines Technical Specifications |
| Small Engines Technical Specifications |
| Outboard Engines Technical Specifications |
