Deutz BF4L913 Troubleshooting
| Engine Model: Deutz BF4L913 |
| Engine Type: 4-cycle inline 4-cylinder direct injection air-cooled diesel |
| Total Displacement: 249 cu.in (4.1 L) |
| Rated Engine Power: 67-129 Hp (50-96 kW) at 2500 rpm |
| Aspiration Type: Turbocharged |
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| Engine starts up hard or doesn't start |
Fuel filter plugged - Change the filter element.
Air in the fuel system - Air bleeding.
Damaged or dirty injection nozzles - Inspect nozzles and replace if necessary.
Fuel injection pump damage - Replace or rebuild injection pump.
Improper valve timing - Use correct valve timing adjustment.
Clogged fuel pipes - Service fuel pipes.
Unadjusted injection timing - Adjust according to specifications.
Worn cylinder or piston rings - Change faulty parts.
| Diesel starts but stalls suddenly |
Fuel filter element clogging - Clean or replace the filter.
Fuel injection pump is defective - Replacement or repair required.
Air filter is clogged - Install new air filter element.
Nozzle opening pressure is incorrect - Adjust according to specifications.
| Engine shuts off suddenly during operation |
Fuel injection timing is not adjusted - Set it up as required.
Fuel filter element clogging - Clean the filter element.
Engine is not fully warmed up - Warm up to required temperature.
Injection nozzles are burnt or jammed - Change or repair injection nozzles.
| Engine stops while idling |
Low idle speed adjustment is incorrect - Need to adjust idle speed.
Improper valve clearance - Have it adjusted.
Fuel injection pump failure - Rebuild or install a new injection pump.
| Engine power is insufficient |
Faulty fuel injection nozzles - If necessary, replace with a new nozzle.
Clogged fuel lines or hoses - Clean fuel system hoses and lines.
Plugged air filter - Clean or replace the element.
Cylinder-head gasket is leaking - Gasket should be replaced.
Injection timing is incorrect - Set up as recommended.
Fuel injection pump failure - Replace or rebuild injection pump.
Any of moving engine parts is worn - Repair or replace defective components.
Cooling fins are clogged - Need to clean or wash.
Broken or loose fan belt - Change the fan belt.
Engine oil level is low - Add oil to the engine crankcase.
Cylinder head gasket is worn - Gasket should be replaced.
Injection timing is incorrect - Set up as recommended.
Low oil level - Need to add oil.
Worn oil pump - Replace as required.
Oil filter clogged - Clean or replace engine oil filter element.
Stuck or defective relief valve - Change or service relief valve.
Crankshaft bearing clearance is excessive - Inspect and change or repair worn components.
Excessive oil clearance of crankpin bearing - Inspect and replace or repair faulty parts.
| Engine oil consumption is too high |
Oil leaking: Defective seals or gaskets - Defective components must be replaced.
Oil viscosity is incorrect - Use oil of correct viscosity.
Worn or stuck piston rings - Replace piston rings.
Valve guides or stems are damaged - Valves must be replaced.
Pistons or cylinder liners are damaged - Check pistons and liners, change as required.
Engine is not fully warmed up - Warm up the engine.
Lack of engine oil - Add oil to the engine crankcase.
Fuel injection pump timing is wrong - Use the correct fuel injection pump timing adjustment.
Pistons are worn or broken - Pistons replacement required.
Connecting rod is worn or not aligned - Align or change connecting rod.
Low battery voltage - Recharge the battery.
Battery will not hold charge - Service or change the battery.
Disconnected battery cables or bad terminals - Connect cables correctly or replace terminals.
Battery is discharged or defective - Recharge or replace battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Battery voltage is low - Recharge the battery.
Starter motor is faulty - Repair or change starter.
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