Hitachi ZAXIS 120-3 class, Operator'S Manual

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TROUBLESHOOTING
11-3
ENGINE
Problem Cause Solution
Coolant Temperature Too Low Thermostat See your authorized dealer.
Temperature gauge or sending unit See your authorized dealer.
Low Engine Oil Pressure
Engine oil pump or pump drive See your authorized dealer.
Low oil level Add oil.
Engine oil pressure regulation valve See your authorized dealer.
Plugged oil pump intake screen See your authorized dealer.
Plugged oil filter Install a new oil filter.
Oil leaks Check for leaks.
Oil diluted with fuel or coolant See your authorized dealer.
Engine temperature too high Check cooling system.
Wrong oil Drain oil. Use correct oil.
Engine Uses Too Much Oil
Wrong oil Drain oil. Use correct oil.
Oil leaks Check engine oil drain plug.
Engine temperature too high Check cooling system.
Plugged air cleaner Clean element or install new element.
Internal engine component wear See your authorized dealer.
Engine Uses Too Much Fuel Plugged or dirty air intake system Clean air intake system.
Wrong fuel Use correct fuel.
Fuel injection nozzles See your authorized dealer.
Injection pump out of time See your authorized dealer.
Excessive Black or Gray
Exhaust Smoke
Wrong fuel Drain tank. Use correct fuel.
Plugged or dirty air intake or exhaust
system
Clean air intake and exhaust system.
Injection pump out of timing See your authorized dealer.
Injection nozzles dirty or faulty See your authorized dealer.
Basic engine failures See your authorized dealer.