RECOMMENDED FUEL, COOLANT, AND LUBRICANT
NOTICE
• Komatsu genuine oils are conditioned to maintain the reliability and durability of Komatsu construc-
tion equipment and components.
In order to keep your machine in the best condition for long period of time, it is essential to follow
the instructions in this Operation and Maintenance Manual.
• Failure to follow these recommendations may result in shortened life or excessive wear of the en-
gine, power train, cooling system, and/or other components.
• Commercially available lubricant additives may be good or bad for the machine. Komatsu does not
recommend any commercially available lubricant additive.
• Komatsu recommends using Komatsu genuine engine oil for KDPF. If engine oil other than Komat-
su genuine oil for KDPF is used, it may shorten cleaning interval of KDPF filters, adversely affect
the engine such as deteriorated oil may reduce lubricating function, and it may cause failure, short-
ening of the machine life, lowering of performance and increase of fuel consumption.
• Use the fuel, the oil and the lubricant according to the ambient temperature as recommended.
• If the machine is operated at a temperature of -20 °C {-4 °F}  and below, separate devices are need-
ed, so consult your Komatsu distributor.
NOTICE
The fuel used must be ultra low-sulfur diesel fuel.
To ensure good fuel consumption characteristics and ex-
haust gas characteristics, the engine mounted on this ma-
chine uses an electronically controlled high-pressure fuel
injection device and emission gas control system (KDPF).
Since the high-pressure fuel injection device requires high
precision parts and lubrication, if low viscosity fuel with
low lubricating ability is used, its durability may drop con-
siderably. And using fuel with high sulfur content can dete-
riorate the engine parts and KDPF catalyzer, inducing fail-
ures, decrease of the life and degradation in performance.
NOTICE
Use AdBlue/DEF as the aqueous urea solution for SCR system.
AdBlue/DEF is a colorless transparent 32.5% aqueous urea solution.
The quality of AdBlue/DEF is prescribed in ISO22241-1. Always use AdBlue/DEF that conforms to this
quality standard.
In North America, use DEF (Diesel Exhaust Fluid) which is
certified by API (American Petroleum Institute). The certi-
fied DEF has the API DEF Certification Mark shown as fol-
lows. Look for the API DEF Certification Mark when pur-
chasing DEF.
API Diesel Exhaust Fluid Certification Mark is the trade
mark of API (American Petroleum Institute).
RECOMMENDED FUEL, COOLANT, AND LUBRICANT REPLACEMENT PARTS
7-6
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