John Deere 4239TF001 Troubleshooting
| Engine Model: John Deere 4239TF001 |
| Engine Type: 4-stroke in-line 4-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 239 cu.in (3.9 L) |
| Rated Engine Power: 100-110 Hp (75-82 kW) at 2500 rpm |
| Fuel System Type: Direct Injection |
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| Engine starts up hard or will not start |
Clogged fuel filter - Service or replace the filter.
There is air in the fuel system - Bleed the system.
Fuel injection nozzles are clogged or faulty - Service or change injection nozzles.
Fuel injection pump malfunction - Repair or change injection pump.
Incorrect valve timing - Adjust or change timing gear.
Dirty fuel pipes - Service or change fuel pipes.
Injection timing is incorrect - Set up as recommended.
Worn piston rings and cylinder - Change faulty components.
| Diesel starts but stalls suddenly |
Fuel filter plugging - Change filter element.
Fuel injection pump is faulty - Rebuild or replace pump.
Air filter element clogged - Install new air filter element.
Nozzle opening pressure is not adjusted - Set it correctly.
| Diesel shuts off while driving |
Incorrect adjustment of fuel injection pump timing - Adjust according to specifications.
Fuel filter plugged - Filter maintenance required.
Engine is not fully warmed up - Engine is not warmed up to the required temperature.
Injection nozzles are jammed or clogged - Repair or replace injection nozzles.
Incorrectly adjusted low idle speed - Normalize low idle speed.
Valve clearance is not correct - Adjust valve clearance according to specifications.
Defective fuel injection pump - Replace or rebuild injection pump.
Clogged or burnt injection nozzle - Install a new kit of correctly balanced nozzles.
Fuel hoses or lines are dirty - Fuel hoses and lines must be clean.
Dirty air cleaner - Clean or replace element.
Leaking cylinder head gasket - Cylinder-head gasket replacement required.
Injection timing is wrong - Set the injection timing correctly.
Faulty fuel injection pump - Repair or install new pump.
One of moving engine components has failed - Repair or replace defective parts.
Dirty radiator core or defective radiator cap - Install new cap or clean radiator.
Engine has a lack of coolant - Add coolant fluid and inspect the cooling system for leaks.
Loose or damaged fan belt - Install new fan belt.
Engine oil level low - Fill the crankcase with engine oil.
Cylinder head gasket is worn - Install a new gasket.
Injection timing is wrong - Use correct injection timing adjustment.
Low oil level - Fill up the engine oil.
Worn oil pump - Repair or change.
Oil filter element clogging - Service or replace engine oil filter.
Relief valve is stuck or worn - Change or service relief valve.
Excessive oil clearance of crankshaft bearing - Inspect and replace or repair faulty components.
Clearance of crankpin bearing is excessive - Test and replace or repair worn components.
| Engine oil consumption is too high |
External oil leaks: Gaskets or seals can be faulty - Change worn parts according to specifications.
Oil viscosity is wrong - Use oil of proper viscosity.
Damaged or seized piston rings - Install new piston rings.
Valve stems or guides are damaged - Valves must be replaced.
Scored pistons or cylinder liners - Inspect liners and pistons, change as necessary.
Engine is not fully warmed up - Engine is not warmed up to the required temperature.
Engine oil level is low - Checking oil level and add if necessary.
Improper fuel injection timing - Set it up as required.
Broken or worn pistons - Replace the pistons.
Misaligned or faulty connecting rod - Connecting rod needs to be aligned or changed.
Battery capacity is low - Low battery charging, charge as required.
Battery will not hold charge - Service or replace the battery.
Wires are disconnected or battery terminals are corroded - Connect wiring properly or install new terminals.
Battery is low or faulty - Charge or change the battery.
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed.
Low battery power - Low battery charging, charge as required.
Defective starter motor - Repair or install a new starter.
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