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20. RECOMMENDED FUEL, COOLANT, AND LUBRICANT
Note 1: Power train of oil has different properties from engine oil. Be sure to use the recommended oil.
Note 2: Axle oil AXO80 has the function of preventing squealing from the brakes and LSD (Limited Slip
Differential).
If only AXO80 is recommended, use Komatsu genuine AXO80 or equivalent.
Note 3: When the ambient temperature is higher than 45°C (113°F) and the machine operation hour is
longer than 12 hours/day, then the use of EO50-CD instead of AXO80 is recommended.
Squealing of the brakes may occur with EO50-CD, but there is no problem with the brake
performance or durability.
Note 4: If the machine is equipped with an automatic greasing system, see “31. HANDLING AUTO-
GREASING SYSTEM”.
Note 5: Hyper grease (G2-T, G2-TE) has a high performance.
When it is necessary to improve the lubricating ability of the grease in order to prevent
squeaking of pins and bushings, the use of G2-T or G2-TE is recommended.
Note 6: Supercoolant (AF-NAC)
1) The coolant has the important function of preventing corrosion as well as preventing freezing.
Even in the areas where freezing is not an issue, the use of antifreeze coolant is essential.
Komatsu machines are supplied with Komatsu Supercoolant (AF-NAC). Komatsu Supercoolant
(AF-NAC) has excellent anticorrosion, antifreeze and cooling properties and can be used
continuously for 2 years or 4000 hours.
Komatsu Supercoolant (AF-NAC) is strongly recommended wherever available.
2) For details of the ratio when diluting super coolant with water, see “24.2.2 CLEAN INSIDE OF
COOLING SYSTEM”.
When the machine is shipped from the factory, it may be filled with coolant containing 30% or
more Supercoolant (AF-NAC). In this case, no adjustment is needed for temperatures down to
–10°C (14°F). (never dilute with water)
3) To maintain the anticorrosion properties of Supercoolant (AF-NAC), always keep the density of
Supercoolant between 30% and 68%.
20.2 RECOMMENDED BRANDS, RECOMMENDED QUALITY FOR PRODUCTS
OTHER THAN KOMATSU GENUINE OIL
When using commercially available oils other than Komatsu genuine oil, or when checking the latest
specifications, refer to the Komatsu web page or consult your Komatsu distributor.
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