PRECAUTIONS FOR HANDLING HYDRAULIC EQUIPMENT
Because of the higher pressure and more precise hydraulic components, the most common cause of a failure is
dust (foreign material) in the hydraulic circuit. The special care must be taken when adding hydraulic oil, or
when disassembling, or assembling the hydraulic components.
Select an appropriate workplace
• In rain or high winds, or in dusty environment, avoid adding hydraulic oil, replacing filters, or repairing the
machine.
Disassembly and maintenance work in the field
• In the field, there is a risk of dust entering the component
during disassembling or maintenance work, and perform-
ance check is hardly performed. Replacement of the as-
sembly is recommended.
• Perform disassembling and maintenance work in the dust
proof area.
Sealing of openings (prevention of flowing out of oil)
Plug the openings of the piping and the device which have been removed to prevent foreign material from enter-
ing and oil from flowing out.
NOTICE
Do not expose the openings or stuff it, otherwise foreign material may enter or leaked oil may pollute
the environment.
Do not discard the oil inconsiderately. Ask the customer for disposal or bring it back to dispose it ap-
propriately.
REMARK
Cover the places tightly with caps, tapes, or plastic bags if it is
hard to provide the plugs.
Preventing intrusion of foreign materials during refilling
• During refilling with the hydraulic oil, do not let water enter
the electrical components.
• Clean the oil filler port and its around, refilling pump, oil
jug, or etc.
• Refilling by using an oil cleaning device is better method
since it can filtrate the contaminants accumulated in the oil
during storage.
PRECAUTIONS FOR HANDLING HYDRAULIC EQUIPMENT
00 INDEX AND FOREWORD
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PC290LL-11
