Deutz F5L912 Troubleshooting
| Engine Model: Deutz F5L912 |
| Engine Type: 4-cycle inline 5-cylinder direct injection air-cooled diesel |
| Total Displacement: 287.3 cu.in (4.71 L) |
| Rated Engine Power: 64-91 Hp (48-68 kW) at 2500 rpm |
| Aspiration Type: Naturally aspirated |
____________________________________________________________________________________
| Engine starts up hard or will not start |
Fuel filter plugging - Install new filter element.
Air trapped in fuel system - Bleed air.
Fuel injection nozzles are faulty or clogged - Replace injection nozzles.
Fuel injection pump damage - Replacement or repair required.
Valve timing is incorrect - Correct or change timing gear.
Restricted fuel pipes - Service or replace fuel pipes.
Wrong injection timing - Adjust according to specifications.
Excessive wear of piston rings and cylinder - Replace faulty parts.
| Engine stalls after starting |
Fuel filter plugging - Install new filter element.
Fuel injection pump malfunction - Repair or replace injection pump.
Air cleaner is dirty - Replace air filter element.
Nozzle opening pressure is incorrect - Adjust as recommended.
| Engine stalls during operation |
Wrong setting of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Fuel filter element is clogged - Clean or replace the filter.
Engine is not warmed up to the required temperature - Warm up engine as required.
Injection nozzles are stuck or clogged - Repair or change injection nozzles.
Wrong adjustment of low idle speed - Adjust low idle speed.
Valve out of adjustment - Adjust to proper valve clearance.
Fuel injection pump is not working correctly - Repair or install a new fuel pump.
| Engine is not running at maximum power |
Faulty fuel injection nozzles - Change fuel injection nozzles.
Clogged fuel lines or hoses - Fuel lines and hoses need to be cleaned.
Clogged air filter element - Clean or change.
Cylinder head gasket is damaged - Replace the gasket as required.
Unadjusted injection timing - Use correct injection timing adjustment.
Fuel injection pump is damaged - Install a new pump or rebuild.
One of moving engine components has failed - Replace or repair damaged components.
Clogged cooling fins - Wash or clean as required.
Loose or defective fan belt - Fan belt must be replaced.
Engine oil level is low - Fill up the engine oil.
Cylinder-head gasket is broken - Gasket should be replaced.
Incorrect injection timing - Set up as recommended.
Low crankcase oil level - Checking oil level and add if necessary.
Defective oil pump - Replace as required.
Oil filter is clogged - Clean or replace engine oil filter element.
Stuck or worn relief valve - Change or clean relief valve.
Crankshaft bearing clearance is excessive - Inspect and change or repair worn components.
Crankpin bearing clearance is excessive - Test and repair or replace worn parts.
| Excessive oil consumption |
External oil leaks: Seals or gaskets are defective - Install new components.
Crankcase oil too light - Fill up with the correct oil viscosity.
Stuck or defective piston rings - Have piston rings replaced.
Damaged valve stems or valve guides - Need to replace the valves.
Cylinder liners or pistons are scuffed - Check pistons and liners, change as required.
| Engine knocking sound or abnormal noise |
Engine not warmed up - Warm up to required temperature.
Insufficient engine oil - Check oil level and add oil as required.
Timing of fuel injection pump is incorrect - Set it up as required.
Pistons are worn or scored - Replace the pistons.
Connecting rod is defective or not aligned - Align or change connecting rod.
Low battery power - Battery is drained, charge it.
Battery runs out quickly - Service charging system or install new battery.
Corroded battery terminals or disconnected wires - Connect wires correctly or change terminals.
Battery is low or faulty - Charge or replace the battery.
Wire harness is disconnected or incorrectly connected - Check wire harness and connect as required.
Battery voltage is low - Battery is drained, charge it.
Faulty starter motor - Repair or change starter.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Outboard Engines Technical Specifications |
