Komatsu PC490LC - Recommended Brands and Qualities Other than Komatsu Genuine Oils

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 4: Non-Amine Engine Coolant (AF-NAC)
1.
The coolant has the important function of an anticorrosive as well as freeze proofing.
Even in the areas where freezing is not an issue, the use of coolant is essential.
Komatsu recommends the use of Non-Amine Engine Coolant (AF-NAC). If you use another coolant, it may
cause serious problems in the cooling system, including the engine.
Komatsu machines are supplied with Non-Amine Engine Coolant (AF-NAC). Non-Amine Engine Coolant
(AF-NAC) has excellent anti-corrosion, antifreeze and cooling properties and can be used continuously for
2 years or 4000 hours.
Non-Amine Engine Coolant (AF-NAC) is strongly recommended wherever available.
2.
For details of the density of Non-Amine Engine Coolant (AF-NAC), see “METHOD FOR CLEANING INSIDE
OF COOLING SYSTEM (4-20)”.
Non-Amine Engine Coolant (AF-NAC) is supplied already diluted. In this case, fill up the tank with pre-dilut-
ed fluid. (Never dilute the Non-Amine Engine Coolant with ordinary water.)
Note 5: If this oil is used for hydraulic system, fuel consumption increases.
We strongly recommend HO56-HE for hydraulic oil.
Note 6: DEF freezes at -11 °C. If thawing is necessary, DEF system is automatically heated and thawed after
the engine is started.
RECOMMENDED BRANDS AND QUALITIES OTHER THAN KOMATSU
GENUINE OILS
When using commercially available oils other than Komatsu genuine oil, consult your Komatsu distributor.
RECOMMENDED FUEL, COOLANT, AND LUBRICANT REPLACEMENT PARTS
7-8