Yanmar 4TNV106T Troubleshooting
| Engine Model: Yanmar 4TNV106T |
| Engine Type: 4-cycle 4-cylinder direct injection liquid-cooled diesel |
| Total Displacement: 269.2 cu.in (4.41 L) |
| Rated Engine Power: 96.6 Hp (72.1 kW) at 2200 rpm |
| Aspiration Type: Turbocharged |
____________________________________________________________________________________
| Diesel hard to start or doesn't start |
Dirty fuel filter - Service the filter.
There is air in the fuel system - Bleed the system.
Fuel injection nozzles are damaged or dirty - Clean or replace injection nozzles.
Fuel injection pump failure - Repair or install a new fuel pump.
Valve timing is incorrect - Set the valve timing correctly.
Restricted fuel pipes - Service or replace fuel pipes.
Incorrect injection timing - Use correct injection timing adjustment.
Excessive wear of piston rings and cylinder - Replace faulty components.
| Diesel starts but stalls immediately |
Dirty fuel filter - Service the filter.
Faulty fuel injection pump - Repair or change injection pump.
Air filter plugged - Clean air cleaner element.
Unadjusted nozzle opening pressure - Adjust as recommended.
| Engine stops running suddenly |
Timing of fuel injection pump is incorrect - Adjust as recommended.
Dirty fuel filter - Install new filter element.
Engine is cold - Warm up engine as required.
Injection nozzles are burnt or jammed - Repair or change injection nozzles.
| Engine stalls at low idle speed |
Incorrect low idle speed adjustment - Correct low idle settings.
Improper valve clearance - Adjustment procedure required.
Fuel injection pump malfunction - Repair or replace injection pump.
| Engine is not running at maximum power |
Fuel injection nozzles fault - Replace injection nozzles.
Fuel hoses or lines are dirty - Fuel lines and hoses need to be cleaned.
Intake air restriction - Clean or change the filter.
Defective cylinder head gasket - Install a new gasket.
Wrong injection timing - Set the injection timing correctly.
Faulty fuel injection pump - Change pump or rebuild it.
Any of moving engine components is faulty - Repair or replace defective components.
Dirty radiator core or defective radiator cap - Replace cap or clean radiator.
Engine coolant is insufficient - The cooling system needs to be refilled and checked for faults.
Loose or defective fan belt - Belt replacement is recommended.
Engine oil insufficient - Checking oil level and add if necessary.
Leaking cylinder head gasket - Gasket should be replaced.
Improper injection timing - Use correct injection timing adjustment.
Insufficient engine oil - Check oil level and add oil as required.
Oil pump failure - Repair or change.
Dirty oil filter element - Change or service engine oil filter.
Relief valve is seized or worn - Replace or service relief valve.
Excessive oil clearance of crankshaft bearing - Test and replace or repair worn components.
Excessive crankpin bearing clearance - Test and repair or replace worn parts.
| Engine oil consumption is too high |
External oil leaks: Damaged seals or gaskets - Worn parts need to be replaced.
Crankcase oil too light - Fill up with the proper oil viscosity.
Stuck or defective piston rings - Piston rings replacement required.
Damaged valve stems or valve guides - Install new valves.
Pistons or cylinder liners are worn - Inspect pistons and liners, change as required.
Engine has not warmed up to the recommended temperature - Warm up the engine.
Not enough engine oil - Fill the crankcase with engine oil.
Wrong setting of fuel injection pump timing - Adjust according to specifications.
Pistons are worn or broken - Install new pistons.
Faulty or misaligned connecting rod - Replace or align connecting rod.
| Starter motor cranks slow |
Battery voltage is low - Battery needs to be recharged.
Battery drains quickly - Service or replace the battery.
Bad battery terminals or disconnected wiring - Connect wiring properly or install new terminals.
Battery is discharged or worn - Need to charge or replace the battery.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Low battery capacity - Battery is drained, recharge it.
Starter motor failure - Change or repair starter.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Outboard Engines Technical Specifications |
