19. Basic Servicing Practices
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19-1-1. Oils
• Because the oil is used in the engine and implement under extreme conditions (high temperature and
pressure), it deteriorates as time elapses.
Be sure to use oils of the grades which are specified in the Operation & Maintenance Manual and suit-
able for the operating temperature range.
Even if the oil is not contaminated, be sure to replace the oil within the specified service hours.
• Oil is equivalent to blood in a human body. Be careful in handling it so that impurities (water, metallic
dust, and foreign solids) will not be mixed into it.
Most machine failures are caused by impurities in the oils.
Be careful not to mix impurities into the oils especially after storing the machine and replenishing oils.
• Do not mix oils of different makes and types.
• Use the specified amount of oil.
Larger or smaller amounts of oil than specified may cause machine problems.
• If the oil becomes cloudy, it may suggest that water or air could have been mixed into the hydraulic
system. If this event happens, ask your dealer.
• Be sure to replace the oil filter element with a new one when changing the oil.
• To know what condition the machine is in, it is recommended that you analyze the properties of the oil
periodically.
Ask your dealer for more information on this issue.
19-1. Oils, fuel, and cooling water
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