Deutz BF4M1012 Troubleshooting
| Engine Model: Deutz BF4M1012 |
| Engine Type: 4-stroke in-line 4-cylinder turbocharged liquid-cooled diesel |
| Total Displacement: 194.6 cu.in (3.19 L) |
| Rated Engine Power: 88 Hp (65 kW) at 2500 rpm |
| Fuel System Type: Direct injection |
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| Engine difficult to start or doesn't start |
Fuel filter element is dirty - Replace the filter element.
Air in fuel system - Bleed fuel system.
Defective or clogged injection nozzle - If necessary, replace with a new nozzle.
Fuel injection pump is not working correctly - Repair or change injection pump.
Valve timing is improper - Adjust or change timing gear.
Clogged fuel pipes - Clean or replace fuel pipes.
Incorrect injection timing - Set up as recommended.
Cylinder or piston rings are worn - Replace defective parts.
| Diesel starts and then shuts off |
Fuel filter plugged - Replace the filter element.
Defective fuel injection pump - Replace or repair injection pump.
Clogged air cleaner - Service or replace the air filter.
Incorrect nozzle opening pressure - Adjust as required.
| Engine stops suddenly during operation |
Improper fuel injection timing - Set it up as required.
Dirty fuel filter - Change filter element.
Engine has not warmed up to the recommended temperature - Warm up engine as required.
Injection nozzles sticking or clogged - Clean or replace injection nozzles.
| Engine stops while idling |
Too low idle RPM - Normalize low idle speed.
Incorrect valve clearance - Have it adjusted.
Fuel injection pump is not working correctly - Replace injection pump or repair it.
Faulty fuel injection nozzles - Change fuel injection nozzles.
Clogged fuel hoses or lines - Fuel hoses and lines must be clean.
Clogged air cleaner - Carry out maintenance on air filter.
Cylinder head gasket defective - Replace the gasket as required.
Incorrect injection timing - Use correct injection timing adjustment.
Fuel injection pump is damaged - Repair or install new pump.
Any of moving engine parts is worn - Replace or repair damaged components.
Clogged radiator fins or damaged radiator cap - Clean radiator or change cap.
Low engine coolant - Fill radiator to proper level and check components for faults.
Damaged or worn fan belt - Change the fan belt.
Engine oil level low - Checking oil level and add if necessary.
Cylinder head gasket defective - Install a new gasket.
Wrong injection timing - Adjust as recommended.
| Oil pressure is insufficient |
Engine oil level low - Need to add oil.
Oil pump malfunction - Repair or change.
Engine oil filter is plugged - Service or replace engine oil filter.
Stuck or defective relief valve - Replace or clean relief valve.
Clearance of crankshaft bearing is excessive - Inspect and change or repair worn components.
Excessive crankpin bearing clearance - Test and repair or replace worn parts.
| High engine oil consumption |
Oil leakage: Worn gaskets or seals - Replace to repair leaks.
Incorrect oil viscosity - Fill up with the proper oil viscosity.
Piston rings are defective or worn - Replace piston rings.
Worn valve stems and valve guides - Change the valves.
Pistons or cylinder liners are scuffed - Check pistons and liners, replace as required.
| Abnormal engine noise or knocking |
Engine is not warmed up to the required temperature - Warm up to required temperature.
Insufficient engine oil - Checking oil level and add if necessary.
Improper setting of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Piston wear or scoring - Install new pistons.
Connecting rod misalignment or failure - Connecting rod must be aligned or replaced.
Low battery power - Battery is drained, charge it.
Battery discharges quickly - Service battery or replace it.
Faulty battery terminals or disconnected cables - Check cable connections and replace or service terminals.
Battery is discharged or worn - Change or recharge battery.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Battery capacity is low - Battery needs to be recharged.
Starter motor failing - Replace or repair starter.
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