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00 Index and foreword
Foreword, safety and general information
Handling of hydraulic equipment
• With the increase in pressure and precision of the hydraulic components, the most common cause of a
failure is dirt (foreign material) in the hydraulic circuit. Therefore, the special care must be taken when
adding hydraulic oil,or when disassembling or assembling the hydraulic components.
Be careful of working environment
• Avoid adding hydraulic oil, replacing filters, or
repairing the machine in rain or high winds, or at
places where there is a lot of dust.
Disassembly and maintenance work in the field
• When disassembly or maintenance work of the
hydraulic is performed in the field, there is
danger of dust entering the components. It is
also difficult to check the performance of the
components after repairs, so it is desirable to
use the component exchange service. The
disassembly and assembly of the hydraulic
components must be performed in the specially
arranged dustproof workshop and the
performance test of the components must be
performed with the special testing equipment.
Plugging of opening (prevention of flowing out
of oil)
• Plug the pipes and the openings of the
components which are removed (when plugs
are not prepared, seal with caps, tapes, vinyl
bags, etc.) to prevent entry of foreign material
and flowing out of oil. Never leave the openings
of the pipes and hoses without being covered or
plugged with cloth as foreign material may enter
them or environment may be polluted by the oil
leaked. Do not discard the waste oil somewhere
or other. Hand it over to your customer for
disposal, or dispose it by yourself.
00-30
(ALL-C000-2A4-P-01-A)
Preventing intrusion of foreign materials during
refilling operations.
• Care must be taken when adding hydraulic oil so
that foreign material does not enter. Keep the oil
filler port and the area around it, oil supply pump
and oil container clean. If an oil cleaning device
is used, it is possible to remove the dirt that is
collected during storage. It is a surer means.
Replacing hydraulic oil while its temperature is
high
• When the hydraulic oil is warm, it flows easily. In
addition, sludge can also be drained from the
circuit together with the oil. So, it is better to
change the hydraulic oil while it is warm. When
changing the hydraulic oil, the old oil must be
drained as much as possible. (Drain the oil not
only from the hydraulic tank, but also from the
filter housing and the drain plug hole in the
circuit.) If the old oil is left in the system, the
contaminant and sludge in the oil mix with the
new oil and shorten the life of the new hydraulic
oil.
(Rev. 2012/10)
WA320-7
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