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Engine Will Not Start or Starts Hard
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Fuel tank empty
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Check fuel quantity.
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Fuel tank vent clogged
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Remove cap and listen to sound of air entering tank. See your authorized dealer.
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Water in fuel or water frozen in fuel line
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Drain water from primary fuel filter (water separator). (See Check and Drain Primary Fuel Filter (Water Separator in Maintenance-Every 10 Hours or Daily.) Change filters. (See Replace Primary Fuel Filter (Water Separator) and Replace Final Fuel Filter in Maintenance-Every 500 Hours.)
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Debris in fuel or improper type of fuel
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Check inlet strainer for debris. (See Clean Fuel Tank Filler Screen in Maintenance-As Required.) Check for debris in tank with a flashlight through the filler neck. Check fuel. (See Fuels and Lubricants chapter.)
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Air leak on suction side of fuel system
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Check for bubbles in fuel filter(s) and tighten connections. Inspect fuel lines for damaged lines. See your authorized dealer.
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No electrical power to injection pump solenoid
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Turn key switch to ON. Must hear click at injection pump. Check fuse F9.
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Slow cranking speed
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Check battery and connections.
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Restricted air filter
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Check air filter restriction indicator and air filters. (See Inspect Air Cleaner Elements in Maintenance-As Required.)
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Stuck injection pump metering valve
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Tap injection pump housing (lightly). If engine now starts, see your authorized dealer.
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CED,OUO1079,306 -19-12MAY00-1/7
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| Symptom |
Problem |
Solution |
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Engine Surges or Stalls Frequently
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Air in fuel
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Inspect filter for evidence of air in fuel. Tighten connections and bleed fuel system. (See Bleed Fuel System in Maintenance.)
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Fuel tank vent clogged
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Remove cap and listen to sound of air entering tank. Replace cap. See your authorized dealer.
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Debris in fuel or improper type of fuel
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Check fuel tank inlet strainer and outlet strainer for debris. (See Clean Fuel Tank Filler Screen in Maintenance-As Required.) Check tank for debris with a flashlight through filler neck. Check fuel. (See Fuels and Lubricants chapter.)
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Water in fuel
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Drain water separator and inspect filter element for water. (See Check and Drain Primary Fuel Filter (Water Separator) in Maintenance-Every 10 Hours or Daily.)
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Fuel filter clogged
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Replace filter. (See Replace Primary Fuel Filter (Water Separator) and Replace Final Fuel FIlter in Maintenance-Every 500 Hours.)
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Worn or broken compression rings or cylinder head gasket leaking
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See your authorized dealer.
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CED,OUO1079,306 -19-12MAY00-2/7
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| Symptom |
Problem |
Solution |
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Engine Misses
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Air in fuel
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Check for evidence of air in filter. Tighten connections and bleed fuel system. (See Bleed Fuel System in Maintenance.)
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Debris in fuel or wrong fuel
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Check fuel tank inlet strainer and outlet strainer for debris. (See Clean Fuel Tank Filler Screen in Maintenance-As Required.) Check tank for debris with a flashlight through filler neck. Check fuel. (See Fuels and Lubricants chapter.)
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Idle speeds out of adjustment (too low)
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Adjust speed control linkage. (See Adjust Engine Speed Control Linkage in Maintenance-Every 1000 hours.)
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Engine Does Not Develop Full Power
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Fuel filter(s) clogged
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Replace filter(s). (See Replace Primary Fuel Filter (Water Separator) and Replace Final Fuel FIlter in Maintenance-Every 500 Hours.)
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Wrong grade of fuel
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Drain and add correct fuel. (See Fuels and Lubricants chapter.)
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Air system restricted
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Check air filter restriction indicator and air filters. (See Inspect Air Cleaner Elements in Maintenance-As Required.) Clean or replace. (See Clean Dusty Primary Air Cleaner Element in Maintenance-As Required or Replace Air Cleaner Elements in Maintenance-Every 1000 Hours.)
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Incorrect high idle speed (too low)
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Adjust speed control linkage. (See Adjust Engine Speed Control Linkage in Maintenance-Every 1000 hours.)
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CED,OUO1079,306 -19-12MAY00-3/7
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| Symptom |
Problem |
Solution |
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Engine Emits Excessive Black or Gray Exhaust Smoke
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Restricted air filter
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Check air filter restriction indicator and air filters. (See Inspect Air Cleaner Elements in Maintenance-As Required.) Clean or replace. (See Clean Dusty Primary Air Cleaner Element in Maintenance-As Required or Replace Air Cleaner Elements in Maintenance-Every 1000 Hours.)
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Incorrect grade of fuel
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Use correct grade of fuel. (See Fuels and Lubricants chapter.)
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Incorrect injection pump timing
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See your authorized dealer.
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Air leak between turbocharger and manifold
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Check. See your authorized dealer.
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Engine Emits Excessive Blue or White Smoke
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Cranking speed too slow
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Check batteries and connections.
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Incorrect grade of fuel
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Use correct grade of fuel. (See Fuels and Lubricants chapter.)
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Slow Acceleration
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Improper fuel
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Use correct grade of fuel. (See Fuels and Lubricants chapter.)
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Detonation (Excess Engine Knock)
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Stuck starting aid applicator
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See your authorized dealer.
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Abnormal Engine Noise
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Low or incorrect engine oil
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Add correct oil to proper level. (See Fuels and Lubricants chapter.) Change oil. (See Change Engine Oil and Replace Filter in Maintenance-Every 250 Hours.)
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Loose or worn hydraulic pump drive coupling
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Inspect. See your authorized dealer.
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Engine oil fuel diluted
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Inspect engine oil. Determine cause. See your authorized dealer.
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CED,OUO1079,306 -19-12MAY00-4/7
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| Symptom |
Problem |
Solution |
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Low Oil Pressure
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Low oil level
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Inspect engine oil. (See Fuels and Lubricants chapter.) Add oil to proper level. (See Check Engine Oil Level in Maintenance-Every 10 Hours or Daily.)
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Wrong viscosity oil, or oil diluted with diesel fuel
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Inspect engine oil. (See Fuels and Lubricants chapter.) Change oil. (See Change Engine Oil and Replace Filter in Maintenance-Every 250 Hours.)
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High Oil Pressure
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Wrong viscosity oil (too thick)
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Inspect engine oil. (See Fuels and Lubricants chapter.) Change oil. (See Change Engine Oil and Replace Filter in Maintenance-Every 250 Hours.)
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CED,OUO1079,306 -19-12MAY00-5/7
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| Symptom |
Problem |
Solution |
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Engine Overheats
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Low coolant level
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Fill cooling system and check for leaks. (See Servicing the Cooling System in Maintenance.)
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Low engine oil level
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Add oil to proper level. (See Check Engine Oil Level in Maintenance-Every 10 Hours or Daily.)
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Loose or broken fan belt
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Tighten or replace belt. (See Inspect Serpentine Belt in Maintenance-As Required.)
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Fan on backwards
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Check for correct fan installation. See your authorized dealer.
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Radiator dirty or clogged
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Check air flow. Clean radiator. (See Clean Debris from Condenser and Oil Cooler-If Equipped, and Radiator in Maintenance-As Required.)
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Radiator shroud missing or damaged, or baffles missing
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Inspect. Repair or replace. See your authorized dealer.
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Engine overloaded or operating in wrong gear
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Reduce load.
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Improper fuel
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Use correct grade of fuel. (See Fuels and Lubricants chapter.)
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Damaged radiator cap
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Replace cap.
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Thermostats missing, cooling system coated with lime deposits
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Flush cooling system. (See Servicing the Cooling System in Maintenance.)
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CED,OUO1079,306 -19-12MAY00-6/7
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| Symptom |
Problem |
Solution |
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Excessive Fuel Consumption
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Air system restricted
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Check air filter restriction indicator and air filters. (See Inspect Air Cleaner Elements in Maintenance-As Required.) Clean or replace. (See Clean Dusty Primary Air Cleaner Element in Maintenance-As Required or Replace Air Cleaner Elements in Maintenance-Every 1000 Hours.)
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Leakage in fuel system
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Inspect. See your authorized dealer.
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Incorrect grade of fuel
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Drain, refill with correct fuel. (See Fuels and Lubricants chapter.)
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Oil Dripping From Turbocharger Adapter
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Engine idling too much.
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Reduce idling engine. See your authorized dealer.
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Dirt entering engine.
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Check vent tube to ensure tube is not clogged. Clean. (See Clean Crankcase Vent Tube in Maintenance.)
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Turbocharger oil return line carbon build up where line passes exhaust manifold
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See your authorized dealer.
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CED,OUO1079,306 -19-12MAY00-7/7
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