Deutz BF6L914 Troubleshooting
| Engine Model: Deutz BF6L914 |
| Engine Type: 4-stroke in-line 6-cylinder turbocharged air-cooled diesel |
| Total Displacement: 395 cu.in (6.47 L) |
| Rated Engine Power: 148 Hp (110 kW) at 2500 rpm |
| Fuel System Type: Direct injection |
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| Engine starts up hard or will not start |
Clogged fuel filter - Change the filter element.
Air in the fuel lines - Bleed the fuel lines.
Fuel injection nozzles are dirty or defective - Inspect nozzles and replace if necessary.
Defective fuel injection pump - Repair or install a new fuel pump.
Valve timing is improper - Correct or replace timing gear.
Fuel pipes are plugged - Service or change fuel pipes.
Improper injection timing - Use correct injection timing adjustment.
Worn cylinder or piston rings - Replace faulty parts.
| Diesel starts and stalls immediately |
Dirty fuel filter - Change the filter element.
Defective fuel injection pump - Install a new pump or rebuild.
Air filter is clogged - Service or replace the air filter.
Unadjusted nozzle opening pressure - Adjust as required.
| Diesel shuts off while driving |
Incorrect adjustment of fuel injection pump timing - Adjust as recommended.
Fuel filter element is dirty - Service the filter.
Engine is cold - Normalize the temperature by warming up the engine.
Injection nozzles are stuck or clogged - Change or repair injection nozzles.
| Engine shuts off while idling |
Incorrectly set low idle speed - Adjust low idling as recommended.
The valve clearance is not adjusted - Correct valve clearance.
Fuel injection pump is not working correctly - Replace or repair injection pump.
Dirty cooling fins - Service and clean.
Fuel injection nozzles are damaged or dirty - Check and replace nozzles if required.
Restricted fuel lines or hoses - Service fuel hoses and lines.
Clogged air filter - Clean or change.
Cylinder-head gasket is leaking - Install a new gasket.
Injection timing is incorrect - Adjust injection timing as required.
Fuel injection pump is faulty - Change or repair the pump.
One of moving engine components is worn - Repair or replace defective parts.
Cooling fins are dirty - Clean the fins.
Damaged or worn fan belt - Install new fan belt.
Engine oil insufficient - Fill up the oil to required level.
Leaking cylinder head gasket - Gasket should be replaced.
Unadjusted injection timing - Set up as recommended.
| Insufficient oil pressure |
Engine oil insufficient - Need to add oil.
Oil pump is damaged - Install a new pump.
Plugged engine oil filter - Replace or service engine oil filter.
Stuck or worn relief valve - Change or service relief valve.
Clearance of crankshaft bearing is excessive - Test and repair or replace worn parts.
Excessive oil clearance of crankpin bearing - Inspect and replace or repair faulty parts.
Oil leaking: Gaskets or seals can be faulty - Replace worn parts to avoid leaks.
Wrong oil viscosity - Use proper viscosity oil.
Damaged or seized piston rings - Piston rings need to be replaced.
Worn valve stems and valve guides - Need to replace the valves.
Cylinder liners or pistons are scuffed - Inspect liners and pistons, replace as necessary.
| Abnormal engine noise or knocking |
Coolant temperature is low - Warm up the engine.
Not enough engine oil - Checking oil level and add if necessary.
Fuel injection pump timing is not adjusted - Set up as recommended.
Worn or broken pistons - Replace the pistons.
Misaligned or defective connecting rod - Connecting rod must be aligned or replaced.
| Starter motor cranks slow |
Battery power is low - Low battery charging, charge as required.
Battery runs out quickly - Battery needs to be serviced or replaced.
Disconnected battery cables or bad terminals - Connect cables properly or replace terminals.
Battery is low or faulty - Charge or replace the battery.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Low battery output voltage - Low battery charging, charge as required.
Starter motor is faulty - Change or repair starter.
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