3.
Fuel, oil, antifreeze and auxiliary battery
3.1
Fuel
Fuel quality and
composition is very important. Poor quality fuel reduces engine performance and
durability. In order to make the diesel engine has higher reliability and lower
fuel consumption, we recommend using the diesel complied with relating national
standard or international standard.
For more details of the
fuel standards, please refer to the technical specifications of the respective
country.
Warning! Do not mix
gasoline, alcohol or alcohol-gasoline mixture in diesel, otherwise it will
cause explosion.
Attention: Because the
tolerance of diesel injection system is extremely precise , it’s very important
to keep the fuel clean and no dirt or water. If there is water or dirt in the
fuel system, it may severely damage the fuel pump and injectors.
3.2
Oil
The precision of Yuchai4D24 series engine parts is very high, hence the oil selection requirements is
strict. Above CF-4 level engine oil must be used, engine oil CF4 15-40 (quality
grade of CF-4, viscosity grade of 15W-40) is recommended.
Oil pressure of this
engine is (0.3 ~ 0.6) MPa at rated speed, and not less than 0.1MPa at idle
speed.
RAYWIN engine requires
multi-grade viscosity oil, because the suitable temperature operating range of
multi-grade viscosity oil is wide, which can meet the requirement of the engine
works properly with temperature varied by a wide margin in the morning and
evening, or works across different temperature regions, or works during long
time season. Furthermore, the consumption of single-grade viscosity oil is
about 30 percent higher than the multi grade viscosity oil.
Oil grade represents the
level of engine oil additives, for heavy duty engine, the oil additives is the
main protective matters. The additives will be consumed over time gradually,
that's why the adequate grade oil should be chosen for ensuring the engine to
be well protected throughout the oil change interval.
Please fill the oil
according to the circumstances after replacing the oil filter. After filling
the oil,m run the engine for 2 minutes then make it be still for 15 minutes,
check the oil sump level, the oil should be in the place between 1/2 of
lower/upper limit and upper limit.
The user can use higher
grade oil instead of low grade oil, oil and fuel ratio should be complied with
relating national or international standard.
Other
rule:
1) When the total
alkalinity (TBN) of the engine oil drops t0 1.0, it must be replaced. TBN (mgKOH/g) tested standard: as per JIS K-2501-5.2-2
(HCI), or ASTMD4739(HCI)
2) Standard engine oil
replacement interval is 250 hours or 12 months.
3) Do not add any
additives in the engine oil.
4) Do not blend
different types, and/or brands oil.
3.3
Antifreeze
Attention: When the
engine stops working and no insulation measures is took below 0°C, the water in
the cooling system will freeze, and the volume expands which causes block,
radiator, cylinder head, water pump and other cooling system components
cracked, therefore, antifreeze must be filled into the cooling system.
For a longer lifetime,
we suggest to use RAYWIN recommended antifreeze.
Attention: Fresh water
is not suitable for the engine coolant, because the thermal conductivity of
fresh water is very poor, which can lead to inadequate cooling and make engine
internal component damaged.
Usually, choose the
freezing point as 10°C lower than the lowest temperature of the equipment
running area. For example, suppose the minimum temperature in some area is
-15°C, then select antifreeze with type of -25.
3.3.2
Note for using antifreeze
a) Please clean the
engine cooling system with water before antifreeze is filled, it's better to
clean it with demineralized or deionized water.
b) Pay attention to
checking the antifreeze level and the tightness of cooling system. Do not fill
up antifreeze fully if the machinery has no overflow tank, but 95% volume or so;
If there is an overflow tank on the machinery, fill antifreeze to the specified
scale firstly, then run the engine for a few minutes, and continue to fill
antifreeze to the required scale;
c) The antifreeze from
different manufacturers or with different types cannot be mixed, or else the
antifreeze performance would be reduced, even it causes engine damage.
d) If the level is below
required scale, please fill to a required scale. The filled antifreeze must be
same type from same manufacturers as the existing antifreeze in the engine.
e) The glycol is toxic,
please clean it with water immediately if the glycol is contacted with skin;
Glycol will burn in case of fire, so do not weld or make fire near the engine
with antifreeze leakage; The boiling point of glycol is 197.4°C, so it's easy
to evaporate for the water in antifreeze, please make up water after the
antifreeze works for some time.
3.3.3
Replace antifreeze regularly.
a) Light duty
antifreeze/inorganic antifreeze replacement cycle is 24 months.
b) Heavy duty
antifreeze]organic antifreeze, replacement cycle is 36 months.
c) The technical
requirements of light duty antifreeze linorganic antifreeze or heavy duty
antifreeze/organic antifreeze should meet the petrochemical industry standards
or RAYWIN Q/YC 908 "engine coolant technical conditions" requirement.
3.4
Battery selection
With the machinery
electricity consumption is increasing in plateau or alpine regions in the
winter (-15°C or less), to ensure and improve engine cold starting performance,
the machinery should be equipped with same capacity low temperature batteries.
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