Perkins 4.108 Troubleshooting
| Engine Model: Perkins 4.108 |
| Engine Type: 4-cycle vertical 4-cylinder indirect injection liquid-cooled diesel |
| Total Displacement: 107.4 cu.in (1.76 L) |
| Rated Engine Power: 37-45 Hp (30-36 kW) at 3000-3600 rpm |
| Aspiration Type: Naturally aspirated |
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| Engine starts up hard or won't start |
Fuel filter element clogging - Clean the filter or install new filter element.
Air in the fuel lines - Bleed the fuel lines.
Faulty fuel injection nozzles - Check injection nozzles and replace if required.
Fuel injection pump is faulty - Install a new pump or rebuild.
Valve timing is wrong - Use correct valve timing adjustment.
Dirt in the fuel lines or hoses - Service or change fuel pipes.
Injection timing is incorrect - Use correct injection timing adjustment.
Worn cylinder or piston rings - Change defective components.
| Engine starts but stalls immediately |
Dirty fuel filter - Clean or replace the filter.
Faulty fuel injection pump - Replacement or repair required.
Dirty air cleaner - Clean or replace the element.
Unadjusted nozzle opening pressure - Adjust as recommended.
| Engine stalls while running |
Wrong setting of fuel injection pump timing - Adjust as recommended.
Clogged fuel filter - Clean the filter element.
Coolant temperature is low - Warm up engine as required.
Injection nozzles are jammed or clogged - Repair or change injection nozzles.
Low idle speed adjustment is incorrect - Adjust as required.
Valve out of adjustment - Adjustment procedure required.
Fuel injection pump failure - Change pump or rebuild it.
| Engine is not running at maximum power |
Fuel injection nozzles are dirty or defective - Inspect nozzles and replace if necessary.
Dirty fuel lines or hoses - Fuel hoses and lines must be clean.
Air cleaner is dirty - Clean or change the filter.
Blown cylinder head gasket - Change cylinder head gasket.
Injection timing is out of adjustment - Set up as recommended.
Fuel injection pump is broken - Change or repair the pump.
Any of moving engine parts is worn - Change or repair damaged parts.
Clogged radiator core or damaged radiator cap - Install new cap or clean radiator.
Coolant level is low - Fill the cooling system and check components for leaks or other faults.
Fan belt is loose or defective - Replace the fan belt.
Engine oil level low - Checking oil level and add if necessary.
Cylinder head gasket is damaged - Change cylinder head gasket.
Improper injection timing - Set up as recommended.
| Insufficient oil pressure |
Not enough oil in the engine - Need to add oil.
Defective oil pump - Repair or replace.
Clogged oil filter element - Clean or replace engine oil filter element.
Stuck or worn relief valve - Relief valve need to be replaced or cleaned.
Excessive crankshaft bearing clearance - Check and replace or repair defective parts.
Excessive crankpin bearing clearance - Check and change or repair defective parts.
Oil leaking: Damaged seals or gaskets - Change worn parts according to specifications.
Oil viscosity is wrong - Use oil of proper viscosity.
Seized or wear piston rings - Replace piston rings.
Valve guides or stems are damaged - Replace defective valves.
Cylinder liners or pistons are damaged - Inspect liners and pistons, replace as necessary.
Low coolant temperature - Warm up engine as required.
Engine oil insufficient - Need to add engine oil.
Improper setting of fuel injection pump timing - Set up as recommended.
Pistons are worn or broken - Pistons need to be replaced.
Connecting rod misalignment or failure - Connecting rod needs to be replaced or aligned.
Low battery capacity - Battery needs to be recharged.
Battery is not holding charge - Battery needs to be serviced or replaced.
Bad battery terminals or disconnected wiring - Connect wires properly or change terminals.
Battery is discharged or defective - Replace or charge as required.
Disconnected or improperly connected wiring harness - Inspect battery wiring harness and connect as required.
Battery capacity is low - Low battery charging, charge as required.
Faulty starter motor - Starter needs to be replaced.
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