Lubricants, Coolant And Filters; Handling Oil, Fuel, Coolant, And Performing Oil Clinic - Komatsu PC78US-6 Operation & Maintenance Manual

LUBRICANTS, COOLANT AND FILTERS

LUBRICANTS, COOLANT AND FILTERS

HANDLING OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC

Oil
Oil is not dirty, always change the oil after the specified interval.
Oil is used in the engine and work equipment under extremely severe conditions (high temperature, high
pressure), and is deteriorates with use.
Always use oil that matches the grade and temperature for use given in the Operation and Maintenance Manual.
Never mix oils of different grades or brands.
Oil corresponds to blood in the human body, so always be careful when handling it to prevent any impurities
(water, metal particles, dirt, etc.) from getting in.
Take particular care not to let any impurities get in when adding oil.
The majority of problems with machine are caused by the entry of such impurities.
Always add the specified amount of oil.
Having too much oil or too little oil are both causes of problems.
When changing the oil, always replace the related filters at the same time.
If the oil in the work equipment is not clear, there is probably water or air getting into the circuit. In such cases,
please contact your Komatsu distributor.
We recommend you have an analysis made of the oil periodically to check the condition of the machine. For
those who wish to use this service, please contact your Komatsu distributor.
Fuel
The fuel pump is a precision instrument, and if fuel containing water or dirt is used, it cannot work properly.
Be extremely careful not to let impurities get in when storing or adding fuel.
Always use the fuel specified in the Operation and Maintenance Manual.
Fuel may congeal depending on the temperature when it is used (particularly in low temperature below -15 C (5
F)). It is necessary to change for the fuel that is suitable for the temperature.
To prevent the moisture in the air from condensing and forming water inside the fuel tank, always fill the fuel tank
after completing the day's work.
Before starting the engine, or when 10 minutes have passed after adding fuel, drain the sediment and water from
the fuel tank.
If the engine runs out of fuel, or if the filters have been replaced, it is necessary to bleed the air from the circuit.
If there is any foreign material in the fuel tank, wash the tank and fuel system.
Cooling System Coolant
If the coolant level is low, it will cause overheating and will also cause problems with corrosion from the air in the
coolant.
River water contains large amount of calcium and other impurities, so if it is used, scale will stick to the engine and
radiator, and this will cause defective heat exchange and overheating.
Do not use water that is not suitable for drinking.
This anti-freeze is also effective in preventing corrosion on the parts of the engine cooling system. It may be
continuously used for two years or 4000 hours of operation, so continue to use it in the other seasons than
summer, too.
When using anti-freeze, always observe the precautions given in the Operation and Maintenance Manual.
Anti-freeze is flammable, so be extremely careful not to expose it to flame or fire.
The proper mixing proportion of the antifreeze depends on the ambient temperature. For the mixing proportion,
see "Cooling System Coolant - Clean/Change (PAGE 4-21)".
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MAINTENANCE