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Indication/Trouble Possible Causes Action / Reference
9.1.6 Miscellaneous Engine Troubleshooting
Loss of power
Air cleaner or hose restricted Section 8.5.10
Air in fuel system Section 8.5.2
Air vent restricted in fuel tank cap Clean
Restricted fuel lines Engine Manual
Defective fuel injection pump Engine Manual
Defective injector(s) or incorrect type Engine Manual
Incorrect fuel injection pump timing Engine Manual
Incorrect valve timing Engine Manual
Poor compression Engine Manual
Vibration
Engine shockmounts defective Replace
Poor compression Engine Manual
Overheating
Air cleaner or hose restricted Section 8.5.10
Exhaust pipe restriction Remove
Restriction in water jacket Engine Manual
Restriction in radiator Section 8.5.14
Coolant level too low Section 8.5.14
Loose water pump Engine Manual
Defective thermostat Engine Manual
Water pump belt loose/broken Section 8.5.16
Excessive crankcase pressure Plugged crankcase breather Section 8.5.16