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OUTLINE OF MAINTENANCE
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Komatsu recommends using Komatsu genuine filters.
HANDLE ELECTRICAL COMPONENTS
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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.
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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.
•
Wipe off the water drops stuck around connectors before removing the connectors and do not let water
drops get into the connectors when removing the connectors of electrical components after washing the
machine or in the rain.
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Checking and maintenance items are the check of fan belt tension, the check of damage of the fan belt,
and the check of battery fluid level.
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Komatsu recommends installing electric components specified by Komatsu.
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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.
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When working at the seashore, keep the electrical component clean to prevent corrosion.
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When installing electrical component, connect it to the specified power supply connector.
Do not connect the optional power supply to the fuse or starting switch or battery relay, etc.
HANDLING HYBRID COMPONENTS AND HIGH VOLTAGE WIRING
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Never remove and disassemble the hybrid devices (motor-generator, capacitor, inverter, electric
swing motor). The high voltage may be accumulated in the devices and wirings. If you touch them
by mistake, it may cause an electric shock and will lead to serious personal injury or death.
In addition, if they are removed or disassembled by mistake, it will cause failure of the machine.
If they need to be removed, ask your Komatsu distributor.
1. Engine
4-8
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k
WARNING
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DANGER
2. Motor-generator
MAINTENANCE
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