Deutz TCD 7.8 L6 Troubleshooting
| Engine Model: Deutz TCD 7.8 L6 |
| Engine Type: 4-cycle inline 6-cylinder common-rail direct injection liquid-cooled diesel |
| Total Displacement: 475.8 cu.in (7.8 L) |
| Rated Engine Power: 214-335 Hp (160-250 kW) at 2200 rpm |
| Aspiration Type: Turbocharged |
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| Engine starts hard or won't start |
Fuel filter plugging - Install new filter element.
Air in fuel system - Bleed fuel system.
Clogged or defective injection nozzles - Clean or replace injection nozzles.
Faulty fuel injection pump - Repair or change injection pump.
Valve timing is improper - Use correct valve timing adjustment.
Restricted fuel pipes - Service fuel pipes.
Incorrect injection timing - Set up as recommended.
Cylinder or piston rings are worn - Change defective parts.
| Engine starts and stops suddenly |
Clogged fuel filter - Service or replace the filter.
Defective fuel injection pump - Replacement or repair required.
Air filter is clogged - Clean or change.
Unadjusted nozzle opening pressure - Set up as recommended.
| Engine stops running suddenly |
Improper setting of fuel injection pump timing - Use the correct fuel injection pump timing adjustment.
Fuel filter element is clogged - Replace the filter element.
Engine not warmed up - Warm up engine as required.
Injection nozzles sticking or clogged - Repair or change injection nozzles.
Incorrect low idle setting - Correct the settings.
The valve clearance is not adjusted - Adjustment procedure required.
Fuel injection pump is not working correctly - Replacement or repair required.
Clogged or defective injection nozzles - Service or change injection nozzles.
Dirty fuel hoses or lines - Service fuel lines and hoses.
Plugged air filter - Change air filter element.
Worn cylinder head gasket - Gasket should be replaced.
Injection timing is wrong - Adjust as recommended.
Fuel injection pump is damaged - Change or repair the pump.
One of moving engine components has failed - Replace or repair damaged components.
Faulty radiator cap or dirty radiator fins - Change cap or clean radiator.
Lack of engine coolant - The cooling system needs to be refilled and checked for faults.
Fan belt is broken or worn - The fan belt needs to be replaced.
Engine oil level is insufficient - Checking oil level and add if necessary.
Cylinder-head gasket is leaking - Gasket should be replaced.
Injection timing is incorrect - Set the injection timing correctly.
| Oil pressure is insufficient |
Low crankcase oil level - Need to add oil.
Defective oil pump - Check and replace if necessary.
Plugged engine oil filter - Service or change engine oil filter element.
Relief valve is stuck or worn - Relief valve need to be replaced or cleaned.
Crankshaft bearing clearance is excessive - Inspect and replace or repair faulty components.
Clearance of crankpin bearing is excessive - Inspect and replace or repair faulty components.
| Engine using too much oil |
Oil leakage: Worn gaskets or seals - Replace worn parts to avoid leaks.
Incorrect oil viscosity - Use correct viscosity oil.
Stuck or defective piston rings - Change piston rings.
Valve guides or stems are damaged - Need to replace the valves.
Cylinder liners or pistons are scuffed - Inspect liners and pistons, change as necessary.
Engine has not warmed up to the recommended temperature - Warm up to required temperature.
Lack of engine oil - Fill the crankcase with engine oil.
Improper setting of fuel injection pump timing - Adjust according to specifications.
Worn or scored pistons - Have pistons replaced.
Connecting rod misalignment or failure - Align or change connecting rod.
Low battery capacity - Recharge the battery.
Battery drains quickly - Service battery or change it.
Disconnected wires or corroded battery terminals - Connect wires properly or change terminals.
Battery is drained or worn - Charge or change the battery.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Battery power is low - Charge the battery.
Damaged starter motor - Starter should be replaced.
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