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E-5
TROUBLESHOOTING
CLASSIC 300D
E-5
ENGINE TROUBLESHOOTING
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
TROUBLE CAUSES WHAT TO DO
1. Engine does not start Faulty Ignition switch and or Injector pump solenoid Correct the connection and contact.
Insufficient charging or complete discharge of the battery
Charge.
Lack of fuel Supply fuel.
Air mixed in the fuel system Bleed air (To be done by qualified personnel only)
Clogged fuel filter Replace.
Irregular and faulty fuel supply (Injector pump trouble) Repair in an authorized service shop.
Glow plug not heated Breakage of the glow plug; replace.
Improper viscosity of the lubricating oil Inspect and replace.
Clogged air cleaner Clean or replace.
No compression Repair in a service shop.
Engine protection light is ON 60 second start period elapsed, Turn ignition switch
OFF & ON - See #4 Below.
2. Irregular running of the engine Air mixed in the fuel system Bleed air (To be done by qualified personnel only)
Uneven fuel injection (Faulty fuel injector pump) Repair in an authorized service shop.
Clogged fuel filter Replace.
Defective governor Check and correct.
Engine itself defective Repair in an authorized service shop.
3. Engine stops during operation Lack of fuel in the fuel tank
Supply fuel and bleed air (To be done by qualified personnel only)
and the Engine Protection light Clogged fuel filter Replace.
does not turn on. Air mixed in the fuel system Bleed air (To be done by qualified personnel only)
Faulty function of the engine Repair in a service shop.
4. Engine stops during operation a. Overheat of the Engine
and the Engine Protection light Lack of Coolant Supply coolant. Inspect leakage and correct.
does turn on. Loose or slipping fan belt Remove oil, dust, etc. and tighten.
Damaged fan belt Replace.
Clogged radiator Flush the radiator.
Clogged radiator fin Clean.
Dust or scale clogged in the cooling water passage Flush the system.
Faulty function of the thermostat Inspect or replace thermostat.
Lack of lubricating oil. Add oil.
Overloading Decrease the load.
Faulty Idler/Engine Protection P.C. Board Replace.
b. Loss of Engine Oil Pressure
Lack of engine oil Supply oil up to the specified level.
Fault in the Oil Pressure Switch Replace the switch.
Oil leakage from the lubricating system Inspect and retighten.
Clogged oil filter Replace with new one.
Oil too light Drain and refill with proper grade.
Faulty Idler/Engine Protection P.C. Board Replace.
5. White or Blue Smoke Excess engine oil Inspect and correct the level.
Too low viscosity of the engine oil Inspect and replace the oil with proper grade.
Faulty injection timing Repair in a service shop.
6. Dark Grey Smoke Unsuitable fuel Inspect and replace with correct grade.
Excess injection Inspect and adjust (in a service shop).
Faulty function of the engine Repair in a service shop.
Overloading Reduce the load.
Clogged air cleaner Clean.
7. Faulty Charging Loose fan belt Correct the tension.
Faulty wiring Inspect and correct.
Faulty battery Repair.
Worn out alternator brush Replace.
8. Starter Motor does not run Loose or damaged wiring Inspect and tighten.
Drained voltage from battery Charge the battery.
Damaged starter motor (including solenoid) Repair in a service shop.
9. Engine Protection Light not Broken Light Bulb Replace the bulb.
coming on (after the ignition Faulty light wiring (to GND or P.C. Board) Correct.
switch has been in the ON Faulty Idler/Engine Protection P.C. Board Replace.
position for more than 60
seconds with the engine
not started).