John Deere 6081H Troubleshooting
| Engine Model: John Deere 6081H |
| Engine Type: 4-stroke in-line 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 496 cu.in (8.1 L) |
| Rated Engine Power: 250-413 Hp (186-308 kW) at 1800-2200 rpm |
| Fuel System Type: Direct injection |
____________________________________________________________________________________
| Engine hard to start or won't start |
Fuel filter plugging - Service the filter.
There is air in the fuel system - Bleed the system.
Fuel injection nozzles are faulty or clogged - Check injection nozzles and replace if required.
Fuel injection pump is not working correctly - Install a new fuel pump or repair.
Improper valve timing - Use correct valve timing adjustment.
Dirty fuel pipes - Service or change fuel pipes.
Unadjusted injection timing - Set the injection timing correctly.
Worn cylinder or piston rings - Change faulty components.
| Engine starts but stalls immediately |
Fuel filter plugged - Clean the filter element.
Fuel injection pump is not operating properly - Change or repair the pump.
Plugged air filter - Clean or change the filter.
Unadjusted nozzle opening pressure - Adjust as required.
| Engine shuts off while running |
Improper fuel injection timing - Adjust according to specifications.
Fuel filter plugged - Clean or change the filter.
Engine not warmed up - Warm up the engine.
Stuck or clogged injection nozzle - Service or change injection nozzles.
| Engine stops while idling |
Low idle speed setting is incorrect - Adjustment required.
The valve clearance is incorrect - Adjust valve clearance.
Fuel injection pump damage - Replace or repair injection pump.
| Engine power is insufficient |
Clogged or defective injection nozzles - Clean or change injection nozzles.
Fuel lines or hoses are clogged - Clean fuel system lines and hoses.
Dirty air filter element - Replace air filter element.
Cylinder head gasket is blown - Cylinder-head gasket replacement required.
Wrong injection timing - Check injection timing adjustment.
Fuel injection pump malfunctioning - Rebuild or replace pump.
One of moving engine components has failed - Replace or repair damaged components.
Radiator fins are dirty or radiator cap is defective - Replace cap or clean radiator.
Engine has a lack of coolant - Add coolant and check the components of cooling system.
Loose or defective fan belt - Belt change is required.
Engine oil level is insufficient - Fill the crankcase with engine oil.
Damaged cylinder-head gasket - Cylinder-head gasket replacement required.
Incorrect injection timing - Adjust according to specifications.
Low crankcase oil level - Add oil as required.
Oil pump is defective - Repair or replace.
Oil filter clogged - Change or clean engine oil filter element.
Relief valve is stuck or broken - Change or service relief valve.
Clearance of crankshaft bearing is excessive - Test and repair or replace worn parts.
Crankpin bearing clearance is excessive - Inspect and replace or repair faulty parts.
Oil leaking: Gaskets or seals may be damaged - Defective components must be replaced.
Oil viscosity is incorrect - Use oil of proper viscosity.
Stuck or worn piston rings - Change the piston rings as required.
Valve stems or guides are damaged - Install new valves.
Scored pistons or cylinder liners - Check liners and pistons, install new components as required.
Engine is cold - Warm up the engine.
Engine oil level low - Fill up the engine oil.
Improper setting of fuel injection pump timing - Set the fuel pump timing correctly.
Piston wear or scoring - Pistons replacement required.
Connecting rod is misaligned or defective - Align or replace connecting rod.
Low battery power - Low battery charging, charge as required.
Battery is draining quickly - Service charging system or install new battery.
Bad terminals or disconnected battery cables - Check battery wires and service or replace terminals.
Battery is discharged or worn - Recharge or replace battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Low battery power - Battery is drained, charge it.
Starter motor is defective - Replace or repair starter.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Car Engines Technical Specifications |
| Small Engines Technical Specifications |
| Outboard Engines Technical Specifications |
