John Deere 6619AF Troubleshooting
| Engine Model: John Deere 6619AF |
| Engine Type: 4-stroke in-line 6-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 619 cu.in (10.1 L) |
| Rated Engine Power: 225-290 Hp (168-216 kW) at 2200 rpm |
| Fuel System Type: Direct injection |
____________________________________________________________________________________
| Diesel hard to start or doesn't start |
Fuel filter element is dirty - Replace the filter element.
Air in fuel tank - Bleed fuel tank.
Fuel injection nozzles are damaged or dirty - Check injection nozzles and replace if required.
Fuel injection pump is broken - Repair or replace injection pump.
Unadjusted valve timing - Adjust or change timing gear.
Plugged fuel pipes - Clean or replace fuel pipes.
Improper injection timing - Adjust according to specifications.
Cylinder or piston rings are worn - Change defective parts.
| Diesel starts but stalls immediately |
Fuel filter element is dirty - Change filter element.
Fuel injection pump damage - Repair or replace injection pump.
Plugged air cleaner - Clean or replace element.
Improper nozzle opening pressure - Adjust as recommended.
| Engine shuts off suddenly during operation |
Timing of fuel injection pump is incorrect - Adjust the pump as required.
Dirty fuel filter - Clean or replace the filter.
Coolant temperature is low - Engine is not warmed up to the required temperature.
Stuck or clogged injection nozzle - Repair or change injection nozzles.
Low idle speed setting is not correct - Adjust as required.
Valve clearance is not correct - Adjustment procedure required.
Fuel injection pump malfunctioning - Replacement or repair required.
Dirty or damaged injection nozzles - Replace injection nozzles.
Fuel lines or hoses clogging - Fuel hoses and lines must be clean.
Clogged air filter - Carry out maintenance on air filter.
Cylinder-head gasket is leaking - Cylinder-head gasket replacement required.
Improper injection timing - Adjust injection timing as required.
Faulty fuel injection pump - Install a new pump or rebuild.
One of moving engine components has failed - Replace or repair damaged components.
Faulty radiator cap or dirty radiator fins - Clean radiator or install new cap.
Low coolant level - Fill the cooling system and check components for leaks or other faults.
Fan belt slipping or worn - Fan belt must be replaced.
Lack of engine oil - Need to add engine oil.
Cylinder head gasket is damaged - Replace cylinder head gasket.
Injection timing is wrong - Set up as recommended.
Oil level is insufficient - Check oil level and add oil as required.
Oil pump malfunction - Repair or change.
Oil filter element clogging - Clean or replace engine oil filter element.
Relief valve is stuck or worn - Relief valve need to be replaced or cleaned.
Excessive crankshaft bearing clearance - Check and change or repair defective parts.
Clearance of crankpin bearing is excessive - Check and replace or repair defective parts.
| Engine using too much oil |
External oil leaks: Gaskets or seals may be damaged - To repair leaks, replace worn parts.
Oil viscosity is wrong - Use correct viscosity oil.
Seized or wear piston rings - Piston rings need to be replaced.
Valve stems or guides are damaged - Change the valves.
Cylinder liners or pistons are scuffed - Inspect pistons and liners, fit new components as necessary.
Engine is not preheated - Warm up to required temperature.
Engine oil level is insufficient - Fill up the oil to required level.
Fuel injection pump timing is wrong - Set the fuel pump timing correctly.
Worn or broken pistons - Install new pistons.
Connecting rod is not aligned or worn - Replace or align connecting rod.
Low battery output voltage - Charge the battery.
Battery runs out quickly - Service charging system or install new battery.
Disconnected wires or corroded battery terminals - Connect wiring correctly or install new terminals.
Battery is drained or worn - Need to charge or replace the battery.
Disconnected or incorrectly connected wires - Inspect battery wires and connect correctly.
Battery capacity is low - Low battery charging, charge as required.
Starter motor failing - Starter should be changed.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Car Engines Technical Specifications |
| Small Engines Technical Specifications |
| Outboard Engines Technical Specifications |
