AirMan SG - Engine Oil, Coolant, and Fuel

4. Operation
4-11
4.5 Engine Oil
・
Coolant
・
Fuel
4.5.1 Engine oil
Viscosity of engine oil greatly affects startability, performance, oil consumption of the engine, as well
as wear of the moving parts.
Choose appropriate oil based upon the table below according to the outside air temperature.
Ambient temperature range and oil viscosity (SAE)
A100293E
＊When the unit is delivered from factory, it is filled with the
engine oil having the following specifications:
Classification API service classification CF class or higher
Viscosity SAE10W-30
When two or more different brands of oil are mixed, its performance can be deteriorated. Do not mix oils.
When it is expected to be used for a long period at light load (less than 20% load), it is better to replace
the oil with suitable oil.
Follow the designated regulations to dispose of engine oil.
4.5.2 Coolant
Use soft water of good quality such as tap water for coolant.
When water with dirt, sand, and/or dust contained, or hard water such as well water (ground water) is
used, this will cause deposits inside radiator or on cylinder head, and will cause engine overheat due to
poor flow of coolant.
When the unit is used in a cold region and possible freezing is expected, it is recommended to use LLC
(Antifreeze) for the coolant.
Adjust mixing ratio of LLC with water according to the temperature. (When the unit is delivered from
factory, it is filled with the oil of density 35%.)
Use LLC within the range of its mixing ratio between 30 and 60%. (If LLC in the water exceeds
more than 60%, it may decrease its antifreezing effect.)
Follow the designated regulations to dispose of LLC (Antifreeze).
4.5.3 Fuel
Be sure to use diesel fuel oil.
(Using other oil will cause low power output or damage the engine.)
As for fuel, use diesel fuel oil (having higher than 45 cetane number).
Use of diesel fuel oil having lower than 45 cetane number will cause inferior function to engine and,
what is worse, it will cause serious accident to the engine.
Choose appropriate fuel
Quality of coolant and antifreeze