Yanmar 3TNV Series, Service Manual

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1. General
1.3.2 Lubricating oil
IMPORTANT:
Use of other than the specified engine oil may cause inner parts seizure or early wear, leading to
shorten the engine service life.
(1) Selection of engine lube oil
Use the following engine oil
API classification CD or CF
(Standards of America Petroleum Institute)
SAE viscosity 10W-30 or 15W-40
(Standard of Society of Automotive Engineering)
Engine oil with 10W30 or 15W40 can be used
throughout the year.
(Refer to the right figure.)
(2) Handling of engine oil
Carefully store and handle the oil so as to prevent
dust or dirt entrance. When supplying the oil,
pay attention and clean around the filler port.
Do not mix different types of oil as it may
adversely affect the lubricating performance.
When touching engine oil by hand, the skin of the hand may become
rough. Be careful not to touch oil with your hands without protective
gloves. If touch, wash your hands with soap and water thoroughly.
1.3.3 Coolant water
Use clean soft water and be sure to add the Long Life Coolant Antifreeze (LLC) in order to prevent rust
built up and freezing. If there is any doubt over the water guality, distilled water or pre-mixed coolant
should be used.
The coolants / antifreezes, which are good performance for example, are shown below.
TEXACO LONG LIFE COOLANT ANTIFREEZE, both standard and pre-mixed.
Product codes 7997 and 7998
HAVOLINE EXTENDED LIFE ANTIFREEZE / COOLANT
Product code 7994
IMPORTANT:
Be sure to add Long Life Coolant Antifreeze(LLC) to soft water. In cold season, the LLC is
especially important. Without LLC, cooling performance will decrease due to scale and rust in the
coolant water line. Without LLC, coolant water will freeze and expand to break the cooling line.
Be sure to use the mixing ratios specified by the LLC manufacturer for your temperature range.
Do not mix different types (brand) of LLC, chemical reactions may make the LLC useless and
engine trouble could result.
Replace the coolant water every once a year.
When handling Long Life Coolant Antifreeze, wear protective rubber
gloves not to touch it. If LLC gets eyes or skin, wash with clean water
at once.
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