If DEF or the machine installed with DEF cannot be stored indoors where the temperature is at -11°C or
higher (if they are left outdoors in cold weather), DEF in the tank may freeze.
Drain DEF to prevent it from freezing.
FILTER
• Filters are extremely important safety parts. They prevent impurities in the oil, fuel, and air circuits from en-
tering important equipment and causing problems. Replace all filters periodically. For details, see Operation
and Maintenance Manual.
However, when working in severe conditions, replace the filters at shorter intervals according to the oil and
fuel (sulphur content) being used.
• Never try to clean and use again the filters (cartridge type). Always replace them with new filters.
• When replacing oil filters, check if any metal particles are attached to the old filters.
If any metal particles are found, consult your Komatsu distributor.
• Do not open packages of spare filters until just before they are to be used.
• Komatsu recommends using Komatsu genuine filters.
HANDLE ELECTRICAL COMPONENTS
WARNING
• When the battery disconnect switch key is turned to OFF position for the maintenance work, always
pull out the key and keep it with you. If the key is left in the switch, someone may turn ON the power
by mistake. It is dangerous that causes an electric shock.
• It is extremely dangerous if the electrical component becomes wet or the covering of the wiring is
damaged. This will cause an electrical leakage and may lead to malfunction of the machine. Do not
wash the inside of the operator's cab with water. When washing the machine, be careful not to let
water get into the electrical components.
• When removing the connectors of electrical components after washing the machine or in the rain, wipe off
the water drop stuck around connectors before removing the connectors and keep the water drop away
from inside of the connectors.
• Checking and maintenance items are checking fan belt tension, checking damage of the fan belt and
checking battery fluid level.
• Never install any electrical components other than those specified by Komatsu.
• External electro-magnetic interference may cause malfunction of the control system controller. Accordingly,
consult your Komatsu distributor before installing a radio receiver or other wireless equipment to the ma-
chine.
• When working at the seashore, carefully clean the electric system to prevent corrosion.
• When installing electrical component, connect it to the special power supply connector.
Do not connect the optional power supply to the fuse or starting switch or battery relay, etc.
MAINTENANCE OUTLINE OF MAINTENANCE
4-9
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