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MAINTENANCE
FILTERS
Filters are extremely important safety parts. They prevent impurities in the fuel and air circuits from entering
important equipment and causing problems.
Replace all filters periodically. For details, see the Operation and Maintenance Manual.
However, when working in severe conditions, replace the filters at shorter intervals according to the oil and fuel
(sulfur content) being used.
Never try to clean the filters (cartridge type) and use them again. Always replace with new filters.
When replacing oil filters, check if any metal particles are attached to the old filter. If any metal particles are found,
consult your Komatsu distributor.
Do not open packs of spare filters until just before they are to be used.
Use of Komatsu genuine filter elements is strongly recommended.
OUTLINE OF ELECTRIC SYSTEM
It is extremely dangerous if the electrical equipment becomes wet or the covering of the wiring is damaged. This
will cause an electrical short circuit 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.
Service relating to the electric system is checking fan belt tension, checking damage or wear to the fan belt and
checking battery fluid level.
Never install any electric components other than those specified by Komatsu.
External electro-magnetic interference may cause malfunction of the control system controller, before installing
a radio receiver or other wireless equipment, consult your Komatsu distributor.
When working on the seashore, carefully clean the electric system to prevent corrosion.
When installing electrical equipment, connect it to the special power source connector.
Do not connect the optional power source to the fuse, starting switch, or battery relay.
HANDLING HYDRAULIC RELATED EQUIPMENT
During operations and after completion of operations, the hydraulic equipment is at a high temperature. During
operations, it is also under high pressure, so when performing inspection and maintenance of hydraulic related
equipment, be careful of the following points.
Stop the machine on flat ground, lower the work equipment completely to the ground, and perform the
operation so that there is no pressure on the cylinder circuits.
Always stop the engine.
Immediately after stopping operations, the hydraulic oil and lubricating oil is at high temperature and high
pressure, so wait for the oil temperature to go down before starting maintenance.
Even after the temperature has gone down, some parts may still be under internal pressure, so when
loosening plugs, bolts, or hose connections, do not stand directly in front of the parts, and loosen slowly to
release the internal pressure before removing.
When performing inspection and maintenance of the hydraulic circuit, always release the air in the hydraulic
tank to remove the internal pressure.
Inspection and maintenance include checking the hydraulic system for oil level, replacement of filter elements
and replacement of hydraulic oil.
If high-pressure hoses have been removed, check that there is no damage to the O-rings. If any damage is found,
replace the O-ring.
When the hydraulic oil filter elements or strainers are cleaned or replaced, or when any hydraulic component has
been repaired or replaced, or when a hydraulic piping has been disconnected, bleeding air from the hydraulic
system is required.
OUTLINES OF SERVICE
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