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MAINTENANCE
RECOMMENDED FUEL, COOLANT, AND LUBRICANT
MAINTENANCE
RECOMMENDED FUEL, COOLANT, AND LUBRICANT
Reservoir
Capacity
Engine oil
pan
Transmission
case
Hydraulic
system
Axle
(front and rear)
(each)
Cooling
system
Fuel tank
Specified
Liters 25.5 47 210 40 30.5 300
US gal 6.7 12.4 47.6 10.6 8.0 79.3
Refill
Liters 23 38 139 40 - -
US gal 6.0 10.0 36.4 10.6 - -
NOTICE
Always use diesel oil for the fuel.
To ensure good fuel consumption characteristics and exhaust gas characteristics, the engine mounted on this machine uses an
electronically controlled high-pressure fuel injection device. This device requires high precision parts and lubrication, so if low
viscosity fuel with low lubricating ability is used, the durability may drop markedly.
Note 1: HTHS ( High-Temperature High-Shear Viscosity 150°C), specified by ASTM D4741 must be equal to or
higher than 3.5 mPa-S. Komatsu EOS0W30 and EOS5W40 are the most suitable oils.
Note .2: Power train of oil has different properties from engine oil. Be sure to use the recommended oil.
Note .3: 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 .4: 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 TO50 instead of AXO80 is recommended.
Squealing of the brakes may occur with TO50, but there is no problem with the brake performance or
durability.
For machines with LSD, use AXO80 regardless of the ambient temperature. Do not use TO50.
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: COOLANT
1) Komatsu genuine SUPERCOOLANT (AF-NAC) 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 SUPERCOOLANT (AF-NAC). SUPERCOOLANT (AF-NAC) has excellent
anticorrosion, antifreeze and cooling properties and can be used continuously for two years or 4000 hours.
SUPERCOOLANT (AF-NAC) is strongly recommended wherever available.
2) For details of the density of the COOLANT, see "CLEAN INSIDE OF COOLING SYSTEM (PAGE 4-21)".
COOLANT is supplied already diluted. In this case, add the pre-diluted fluid to keep the tank full. (Never dilute the
COOLANT with ordinary water.)
3) To maintain the anticorrosion properties of COOLANT, always keep the density of COOLANT between 30% and
68%.
RECOMMENDED BRANDS, RECOMMENDED QUALITY FOR PRODUCTS OTHER THAN
KOMATSU GENUINE OIL
When using commercially available oils other than Komatsu genuine oil, consult your Komatsu distributor.
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