Yanmar 3TNV82A Troubleshooting
| Engine Model: Yanmar 3TNV82A |
| Engine Type: 4-cycle 3-cylinder direct injection liquid-cooled diesel |
| Total Displacement: 81.2 cu.in (1.33 L) |
| Rated Engine Power: 26.4 Hp (19.7 kW) at 2600 rpm |
| Aspiration Type: Naturally aspirated |
____________________________________________________________________________________
| Engine hard to start or won't start |
Fuel filter element is dirty - Replace filter element.
Air in fuel system - Bleed fuel system.
Fuel injection nozzles are dirty or defective - Service or change injection nozzles.
Fuel injection pump is faulty - Repair or change injection pump.
Incorrect valve timing - Correct or replace timing gear.
Fuel pipes are clogged - Service or change fuel pipes.
Injection timing is out of adjustment - Adjust injection timing as required.
Worn piston rings and cylinder - Change defective components.
| Engine starts but stalls immediately |
Fuel filter element is dirty - Service or replace the filter.
Fuel injection pump damage - Change pump or rebuild it.
Plugged air filter - Install new air filter element.
Unadjusted nozzle opening pressure - Adjust as required.
| Engine stalls while running |
Timing of fuel injection pump is incorrect - Set the fuel pump timing correctly.
Fuel filter element clogging - Clean the filter or install new filter element.
Engine has not warmed up to the recommended temperature - Warm up to required temperature.
Injection nozzles are jammed or clogged - Clean or replace injection nozzles.
| Engine stalls when idling |
Improperly adjusted low idle speed - Adjust low idle speed.
Valve out of adjustment - Adjustment procedure required.
Damaged fuel injection pump - Install a new fuel pump or repair.
| Engine is not running at maximum power |
Clogged or burnt injection nozzle - Clean or change injection nozzles.
Fuel lines or hoses are clogged - Clean fuel hoses and lines.
Clogged air filter element - Install new air filter element.
Damaged cylinder-head gasket - Gasket should be replaced.
Unadjusted injection timing - Use correct injection timing adjustment.
Fuel injection pump malfunctioning - Replacement or repair required.
One of moving engine parts is faulty - Repair or replace defective components.
Damaged radiator cap or dirty radiator core - Clean radiator or change cap.
Not enough coolant - Add coolant fluid to cooling system and also check it for leaks.
Excessive wear of the fan belt - The fan belt needs to be replaced.
Engine oil level low - Check oil level and add oil as required.
Leaking cylinder head gasket - Install a new gasket.
Unadjusted injection timing - Set up as recommended.
Engine oil level low - Add oil to the engine crankcase.
Worn oil pump - Repair or replace.
Oil filter element is dirty - Service or change engine oil filter element.
Relief valve is stuck or worn - Replace or clean relief valve.
Excessive oil clearance of crankshaft bearing - Inspect and change or repair worn components.
Excessive crankpin bearing clearance - Test and repair or replace worn parts.
Oil leaking: Defective seals or gaskets - Replace defective parts.
Crankcase oil too light - Use proper viscosity oil.
Stuck or worn piston rings - Install new piston rings.
Damaged valve stems or valve guides - Install new valves.
Scored cylinder liners or pistons - Check liners and pistons, change as required.
| Abnormal engine noise or knocking |
Engine not warmed up - Engine is not warmed up to the required temperature.
Not enough engine oil - Check oil level and add oil as required.
Wrong setting of fuel injection pump timing - Set the fuel pump timing correctly.
Piston wear or scoring - Pistons need to be replaced.
Connecting rod is misaligned or worn - Replace or align connecting rod.
Low battery output voltage - Battery is drained, charge it.
Battery does not hold charge - Service charging system or install new battery.
Battery cables are disconnected or terminals are faulty - Check cables and clean or change terminals.
Battery is discharged or defective - Battery needs to be recharged or replaced.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Low battery capacity - Low battery charging, charge as required.
Starter motor failure - Change or repair starter.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Outboard Engines Technical Specifications |
