John Deere 4045AFM85 Troubleshooting
| Engine Model: John Deere 4045AFM85 |
| Engine Type: 4-cycle inline 4-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 275 cu.in (4.5 L) |
| Rated Engine Power: 160-225 Hp (119-168 kW) at 2500 rpm |
| Fuel System Type: Common rail direct injection |
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| Engine starts hard or will not start |
Fuel filter element clogging - Replace filter element.
Air trapped in fuel system - Bleed air.
Clogged or defective injection nozzles - Check and replace nozzles if required.
Fuel injection pump damage - Install a new pump or rebuild.
Valve timing is improper - Adjust or replace timing gear.
Dirt in the fuel lines or hoses - Clean or change fuel pipes.
Injection timing is out of adjustment - Adjust as recommended.
Damaged piston rings and cylinder - Change faulty components.
| Engine starts but then stops |
Clogged fuel filter - Filter maintenance required.
Fuel injection pump is broken - Change pump or rebuild it.
Clogged air filter - Replace air filter element.
Nozzle opening pressure is not adjusted - Set it correctly.
| Engine shuts off while running |
Wrong setting of fuel injection pump timing - Set it up as required.
Fuel filter element clogging - Clean the filter or install new filter element.
Engine not warmed up - Warm up the engine.
Injection nozzles sticking or clogged - Clean or change injection nozzles.
| Engine shuts off while idling |
Incorrect low idle setting - Need to adjust idle speed.
Valve clearance is wrong - Have it adjusted.
Fuel injection pump is defective - Install a new pump or rebuild.
| Diesel engine is losing power |
Fuel injection nozzles are faulty or clogged - Clean or change injection nozzles.
Dirty fuel lines or hoses - Service fuel hoses and lines.
Air filter element clogged - Service or replace the air filter.
Damaged cylinder-head gasket - Change cylinder head gasket.
Incorrect injection timing - Adjust according to specifications.
Fuel injection pump is broken - Repair or install a new fuel pump.
One of moving engine components is worn - Change or repair damaged parts.
Clogged radiator fins or damaged radiator cap - Clean radiator or change cap.
Engine coolant is insufficient - Add coolant fluid and inspect the cooling system for leaks.
Loose or damaged fan belt - Belt change is required.
Engine oil level low - Fill the crankcase with engine oil.
Leaking cylinder head gasket - Cylinder-head gasket replacement required.
Injection timing is improper - Set up as recommended.
Lack of oil - Checking oil level and add if necessary.
Defective oil pump - Remove and inspect oil pump.
Oil filter clogged - Service or change engine oil filter element.
Relief valve is stuck or broken - Replace or service relief valve.
Crankshaft bearing clearance is excessive - Inspect and replace or repair faulty components.
Crankpin bearing clearance is excessive - Inspect and replace or repair faulty parts.
| Engine oil consumption is too high |
Oil leaks: Worn seals or gaskets - Defective components must be replaced.
Crankcase oil too light - Use correct viscosity oil.
Stuck or defective piston rings - Piston rings replacement required.
Damaged valve stems or valve guides - Need to replace the valves.
Cylinder liners or pistons are scored - Inspect pistons and liners, change as required.
Engine not warmed up - Warm up engine as required.
Engine oil level low - Fill the crankcase with engine oil.
Incorrect adjustment of fuel injection pump timing - Adjust as recommended.
Broken or worn pistons - Install new pistons.
Connecting rod is misaligned or worn - Align or change connecting rod.
Battery power is low - Recharge the battery.
Battery drains quickly - Service charging system or replace battery.
Corroded battery terminals or disconnected wires - Connect wires correctly or change terminals.
Battery is low or faulty - Need to charge or replace the battery.
Wire harness is disconnected or incorrectly connected - Check wire harness and connect as required.
Low battery output - Battery is drained, recharge it.
Starter motor is faulty - Repair or install a new starter.
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