Komatsu PC200 -8 Shop Manual page 32

SEN00094-05
Points to remember when 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
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, so it is desirable to use unit exchange.
Disassembly and maintenance of hydraulic
equipment should be carried out in a specially
prepared dustproof workshop, and the perfor-
mance 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
made dirty by leaking oil so never do this. Do
not simply drain oil out onto the ground, but
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 clean-
ing device is used, it is possible to filter out the
dirt that has collected during storage, so this is
an even more effective method.
18
00 Index and foreword
PC200, 220-8