Engine

Symptom Problem Solution

Engine Will Not Start or Starts Hard

Fuel tank empty

Check fuel quantity.

Fuel tank vent plugged

Remove cap and listen for sound of air entering tank. Replace cap.

No electrical power to injection pump solenoid

Turn key switch to START. Must hear or observe movement of stop lever at injection pump. Replace fuse. Repair wiring.

Water in fuel or water frozen in fuel line.

Drain water from fuel tank. Inspect fuel filter for water. Change filter.

Debris in fuel or wrong grade of fuel

Check fuel tank water separator for debris. Clean sediment bowl. Check bottom of fuel tank for debris. Clean tank. Add fuel. Check grade of fuel. Add correct fuel. (See Fuels and Lubricants, Section 45.)

Air leak on suction side of fuel system

Check for bubbles in fuel filter and tighten connections. Inspect fuel lines for damage.

Fuel transfer pump not building pressure to injection pump

Check engine oil for fuel dilution. See your authorized dealer.

Slow cranking speed

Check battery and connections. Incorrect engine oil (Cold weather).

Restricted air filter

Check air filter restriction indicator and air filters. Clean.

Start release solenoid

See your authorized dealer.

Electric shut-off malfunctions

See your authorized dealer.

Improper injection pump timing

See your authorized dealer.

Injection pump

See your authorized dealer.

Injection nozzle(s)

See your authorized dealer.

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Symptom Problem Solution

Worn compression rings or low compression

See your authorized dealer.

Blown head gasket

See your authorized dealer.

Engine Surges or Stalls Frequently

Air in fuel

Inspect filter for evidence of air in fuel. Tighten connections and bleed fuel system.

Fuel tank vent plugged

Remove cap slowly and listen for sound of air entering tank. Replace cap.

Debris in fuel or wrong grade of fuel

Check fuel tank outlet strainer for debris. Check bottom of fuel tank for debris. Clean tank. Add fuel. Check grade of fuel. (See Fuels and Lubricants, Section 45.)

Water in fuel

Drain water separator and inspect filter element for water. Replace filter. Drain fuel tank.

Fuel filter plugged

Replace filter.

Return line from injection pump to tank restricted

See your authorized dealer.

Fuel injection pump out of time

See your authorized dealer.

Engine overheating

See your authorized dealer.

Fuel transfer pump

See your authorized dealer.

Improper valve clearance

See your authorized dealer.

Valve sticking or burned

See your authorized dealer.

Worn or broken compression rings or cylinder head gasket leaking

See your authorized dealer.

Injection nozzle(s)

See your authorized dealer.

Fuel injection pump

See your authorized dealer.

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Symptom Problem Solution

Engine Misses

Air in fuel

Check for evidence of air in filter. Tighten connections and bleed fuel system.

Debris in fuel or wrong grade of fuel

Check fuel tank for water. Check fuel tank strainer and fuel filter for debris. Clean. Check grade of fuel.

Idle speeds out of adjustment (too low)

See your authorized dealer.

Fuel injection pump out of time

See your authorized dealer.

Fuel transfer pump

See your authorized dealer.

Injection pump pumping plungers malfunction.

Inspect. Repair. See your authorized injection pump service center.

Engine overheating

See your authorized dealer.

Incorrect valve clearance

See your authorized dealer.

Bent push rods

See your authorized dealer.

Cylinder head gasket leaking

See your authorized dealer.

Valve sticking or burned

Remove injection pump fuse. Crank engine and listen for air leaking past valves or an uneven starter speed. See your authorized dealer.

Worn or broken compression rings

See your authorized dealer.

Injection nozzle(s) plugged

See your authorized dealer.

Fuel injection pump

See your authorized injection pump service center.

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Symptom Problem Solution

Engine Does Not Develop Power

Water separator or fuel filter plugged

Check fuel tank or sediment bowl for water or debris. Remove and clean.

Fuel filter plugged

Replace fuel filter.

Incorrect grade of fuel

Drain and add correct fuel.

Air system restricted

Check air filter restriction and air filters. Clean. See your authorized dealer.

Incorrect high idle speed (too low) or linkage out adjustment.

Adjust linkage.

See your authorized dealer.

Incorrect engine or injection pump timing

See your authorized dealer.

Air leak in intake manifold

See your authorized dealer.

Incorrect valve clearance

See your authorized dealer.

Injection pump return fuel tube or fittings are restricted

See your authorized dealer.

Fuel transfer pump malfunction

See your authorized dealer.

Fuel line restricted

See your authorized dealer.

Excess drag in brake system

See your authorized dealer.

Turbocharger-if equipped

See your authorized dealer.

Muffler restricted

See your authorized dealer.

Injection pump delivery or governor malfunction

See your authorized dealer.

Injection nozzle(s)

See your authorized dealer.

Low compression

See your authorized dealer.

Worn camshaft

See your authorized dealer.

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Symptom Problem Solution

Engine Emits Excessive Black or Gray Exhaust Smoke

Restricted air filter

Check air filter restriction and air filters. Clean or replace.

Incorrect grade of fuel

Drain and add correct fuel.

Incorrect injection pump timing

See your authorized dealer.

Air leak between turbocharger (if equipped) and manifold

See your authorized dealer.

Excessive fuel delivery

See your authorized injection pump service center.

Restricted fuel delivery

See your authorized injection pump service center.

Injection nozzle(s)

See your authorized dealer.

Turbocharger (if equipped) not functioning

See your authorized dealer.

Engine Emits Excessive Blue or White Smoke

Cranking speed too slow

Check batteries and connections.

Incorrect grade of fuel

Drain and add correct fuel.

Engine running too cold

See your authorized dealer.

Injection pump out of time

See your authorized dealer.

Injection nozzle(s)

See your authorized dealer.

Low compression

See your authorized dealer.

Excessive wear in liners and/or piston rings stuck

See your authorized dealer.

Slow Acceleration

Wrong grade of fuel

Drain and add correct fuel.

Injection nozzle(s)

See your authorized dealer.

Fuel injection pump

See your authorized dealer.

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Symptom Problem Solution

Detonation (Excess Engine Knock)

Low engine oil level.

Add oil.

Stuck cold weather starting aid

See your authorized dealer.

Incorrect injection pump timing.

See your authorized dealer.

Low coolant temperature.

See your authorized dealer.

Abnormal Engine Noise

Low or incorrect engine oil (too thin).

Add correct oil to proper level.

Engine oil diluted with fuel

See your authorized dealer.

Incorrect fuel injection pump timing

See your authorized dealer.

Turbocharger-if equipped

See your authorized dealer.

Excessive valve clearance

See your authorized dealer.

Bent push rods

See your authorized dealer.

Worn rocker arm shafts

See your authorized dealer.

Loose connecting rod caps

See your authorized dealer.

Loose main bearing caps

See your authorized dealer.

Worn main bearings

See your authorized dealer.

Worn connecting rod bearings

See your authorized dealer.

Incorrect cam timing

See your authorized dealer.

Scored piston

See your authorized dealer.

Worn piston pin bushings and pins

See your authorized dealer.

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Symptom Problem Solution

Engine Low Oil Pressure (Oil Pressure Light Illuminates)

Low oil level

Add oil to proper level. Inspect engine oil.

Wrong viscosity oil/oil diluted with diesel fuel

Change oil. See your authorized dealer.

Oil pressure gauge or sensor

Check engine oil pressure. See your authorized dealer.

Oil pressure regulating valve

See your authorized dealer.

Turbocharger-if equipped

See your authorized dealer.

Plugged or broken oil pump intake screen

See your authorized dealer.

Loose oil pump drive gear

See your authorized dealer.

Worn oil pump gear or housing

See your authorized dealer.

Excessive main bearing, connecting rod or balance shaft clearance

See your authorized dealer.

Cracked cylinder block

See your authorized dealer.

Leakage at internal oil passage.

See your authorized dealer.

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Symptom Problem Solution

Engine Overheats (Coolant Temperature Gauge in Red, Engine Temperature Light Illuminates, and Alarm Will Sound)

Two-speed fan not rotating at high speed

See your authorized dealer.

Low coolant level

Fill cooling system and check for leaks.

Low engine oil level

Add oil.

Hydraulic fan drive system malfunction.

Inspect belt tensioner or replace belt. See your authorized dealer.

Engine overloaded

Reduce load.

Fan on backward

See your authorized dealer.

Air to air aftercooler plugged

Check air flow. Clean aftercooler.

Radiator dirty or plugged

Check air flow. Clean radiator. See your authorized dealer.

Improper fuel

Drain and add correct fuel.

Radiator cap

Replace cap.

Temperature sender malfunctions

See your authorized dealer.

Incorrect injection pump timing

See your authorized dealer.

Excessive brake drag

See your authorized dealer.

Thermostat stuck closed

See your authorized dealer.

Thermostat missing, cooling system coated with lime deposits

See your authorized dealer.

Water pump

See your authorized dealer.

Excessive fuel delivery

See your authorized dealer.

Scored piston

See your authorized dealer.

Engine Runs Cold

Thermostat (stuck open)

See your authorized dealer.

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Symptom Problem Solution

Oil in Coolant or Coolant in Oil

Leaking cylinder head gasket

See your authorized dealer.

Leaking cylinder liner packing

See your authorized dealer.

Cracked cylinder liner

See your authorized dealer.

Cracked cylinder block

See your authorized dealer.

Excessive Fuel Consumption

Air system restricted

Check air filter restriction indicator on monitor. Check filter elements. Replace.

Leakage in fuel system

See your authorized dealer.

Incorrect grade of fuel

Refill with correct fuel. (See Fuels and Lubricants, Section 45.)

Turbocharger-if equipped

See your authorized dealer.

Incorrect injection pump timing

See your authorized dealer.

Injection nozzle(s) malfunctions

See your authorized dealer.

Turbocharger (If Equipped) Excessively Noisy or Vibrates

Bearings not lubricated

Insufficient oil pressure. Check for restricted turbocharger oil line (if equipped).

Worn bearings

See your authorized dealer.

Air leak in engine, intake or exhaust manifold

See your authorized dealer.

Improper clearance between turbine wheel and turbine housing

See your authorized dealer.

Broken blades on turbine

See your authorized dealer.

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Symptom Problem Solution

Oil Dripping From Turbocharger Adapter (If Equipped)

Damaged or worn bearings and/or worn seals

Inspect compressor and turbine wheel for damaged blades. Check for proper engine service intervals or dirt entering engine. See your authorized dealer.

Excessive crankcase pressure

See your authorized dealer.

Turbocharger oil return line carbon buildup where line passes exhaust manifold.

See your authorized dealer.

Excessive Drag In Turbocharger Rotating Members (If Equipped)

Carbon build-up behind turbine wheel caused by combustion deposits

See your authorized dealer.

Dirt build-up behind compressor wheel caused by air intake leaks

See your authorized dealer.

Bearing seizure or dirty or worn bearings caused by excessive temperature, unbalanced wheel, dirty oil, oil starvation, or insufficient lubrication

Check for plugged air filters. See your authorized dealer.

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