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FOREWORD
Handling Hydraulic Equipment
With the increase in pressure and precision of hydraulic equipment, the most common cause of failure is dirt (foreign material)
in the hydraulic circuit. When adding hydraulic oil, or when disassembling or assembling hydraulic equipment, it is necessary
to be particularly careful.
1.
Be careful of the operating environment.
Avoid adding hydraulic oil, replacing filters, or repairing the
machine in rain or high winds, or in places where there is a lot of
dust.
2.
Disassembly and maintenance work in the field
If disassembly or maintenance work is carried out on hydraulic
equipment in the field, there is danger of dust entering the
equipment. It is also difficult to check the performance after
repairs. It is preferable to use unit exchange. Disassembly and
maintenance of hydraulic equipment should be carried out in a
specially prepared dustproof workshop, and the performance
should be checked with special test equipment.
3.
Sealing openings
After any piping or equipment is removed, the openings should be
sealed with caps, tapes, or vinyl bags to prevent any dirt or dust
from entering. If the opening is left open or is blocked with a rag,
there is danger of dirt entering or of the surrounding area being
soiled by leaking oil. Do not use rags to block openings. Do not
drain oil out onto the ground; collect it and ask the customer to
dispose of it, or take it back with you for disposal.
4.
Do not let any dirt or dust get in during refilling operations.
Be careful not to let any dirt or dust get in when refilling with
hydraulic oil. Always keep the oil filler and the area around it
clean, and also use clean pumps and oil containers. If an oil
cleaning device is used, it is possible to filter out the dirt that has
collected during storage; this is an even more effective method.
5.
Change hydraulic oil when the temperature is high.
When hydraulic oil or other oil is warm, it flows easily. In
addition, the sludge can also be drained out easily from the circuit
together with the oil. It is preferable to change the oil when it is
still warm. When changing the oil, as much as possible of the old
hydraulic oil must be drained out. Drain the oil from the hydraulic
tank; also drain the oil from the filter and from the drain plug in the circuit.
If any old oil is left, the contaminants and sludge in it will mix with the new oil
and will shorten the life of the hydraulic oil.
WA250-6
HANDLING ELECTRIC AND HYDRAULIC EQUIPMENT
00
00-19
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