MAINTENANCE BASICS
7-6
OIL
The oil in the engine and the hydraulic system is subjected to ex-
treme conditions (high temperatures, high pressure). Thus, its
quality deteriorates the longer it is used.
• Always use the types of oil specified for the particular use
and temperature in the operating and maintenance instruc-
tions. Always adhere to the specified intervals for oil chang-
es.
• Pay particular attention not to contaminate oil and grease
when topping them up. A lot of malfunctions are caused by
contaminated oil.
• Do not mix oils of different types or makes.
• Always top off with the required volume of oil. If the volume
of oil used for topping up is too high or too low, this may lead
to malfunctions.
• If the oil in the work hydraulic system is milky, it is very likely
that there is either water or air present within the system. In
this case, inform the responsible Komatsu dealer.
• Always replace the oil filter when you perform an oil change.
• We recommend that you have the engine oil and the hydrau-
lic oil checked at regular intervals by the responsible Komat-
su dealer to get an impression of the machine's condition.
LUBRICATING GREASE
Lubricating grease reduces wear and operating noise.
• The grease nipples not specified in the "Maintenance
Schedule" are only to be used for overhauling purposes; for
this reason, they do not have to be lubricated.
• To prolong service life lubricate all moving parts.
• Remove old grease which is pressed out during lubrication.
Ensure that the lubricating grease is not contaminated with
sand or dirt, since this would result in premature wear and
tear.
BIODEGRADABLE HYDRAULIC OIL AND LUBRI-
CATING GREASE
Biodegradable hydraulic oil and lubricating grease - based on
synthetic esters - can be used for Komatsu machines. Please
contact our factory representatives for information about the
products which suit best your type of application which are ap-
proved by Komatsu.
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