!8· Accumulator is not charged with nitrogen gas at the time of shipment from NACOL, in consideration of safety and also fatigue to bladder which may occur while transported. Please see "Accumulator Handling and Maintenance Manual " for further details. Please do gas precharging with nitrogen gas just before Accumulator operation upto calculated pressure taking the temperature change into account. (See page 20)· Please use Gas Charging Tools after flashing them through with nitrogen gas. If not flashed, the dust may be transfered from these tools to Accumulator gas valve and may cause gas leak from the Accumulator gas valve. Please take off Gas Charging Tools from the Accumulator after gas charging as gas leak may be caused through these tools when left attached to the Accumulator. Then please keep the Gas Charging Tools in a case protecting them from dust and dirt.· Hydraulic systems that incorporate gas-loaded accumulators shall automatically vent the accumulator liquid pressure or positively isolate the accumulator when the system is shut off. (from ISO 4413-2010)· Please do not use Accumulator constantly with gas precharging pressure surpassing the minimum working pressure of the hydraulic system, as such condition may lead to premature bladder failure and oil port valve assembly parts breakages. Also, please do not leave gas precharged Accumulator unused or leave it precharged while Accumulator hydraulic circuit is stopped and left for more than one month.· When one of the following phenomena can be seen, please stop the hydraulic system and check the precharged gas pressure after relieving the system pressure. - The pressure gauge needle in the Accumulator circuit begins to flutter suddenly. - Oil charge time becomes unusually short. - Movement of actuater becomes unordinarily slow. - Vibration or noise from pipe increases abnormally. - Level of hydraulic liquid in reservoir ascends or descends abnormally.· After one week of use, and then annually thereafter, please perform “gas pressure measurement” to check for leaks and appearance, and record the results. After measuring the gas pressure, adjust the excess or deficiency of the gas charging pressure in consideration of the temperature change. The measurement period may be shortened depending on the operating conditions such as the fluid used, operating temperature, and operating cycle. Please use the gas pressure measurement record to review the measurement period.· When fluid reservoir is installed in a position higher than Accumulator, please do maintenance jobs first closing Accumulator fluid stop valve and drain valve. When the hydraulic service fluid remains in the accumulator body, please remove it before bladder insertion.· When you insert new bladder, please check that there are no abnormalities (rust, crack, corrosion, wear, and deformation) in each part. If there are any abnormalities, please replace the part to new one before the insertion of new bladder. Also, please insert new bladder after applying hydraulic service fluid to the outside surface of bladder.· Please contact our company when the order items and/or the quotation items are for the usages such as military weapon, nuclear power, and weapons of mass destruction. If the usages are for these purposes, the export shall be made after obtaining approval of the Japanese Ministry of Economy, Trade and Industry. Moreover, please do not deal with the enterprise and/or organization on the Foreign Users List provided by the Japanese Ministry of Economy, Trade and Industry.WARNINGNotice to be paid at Gas Charging.Notice to be paid when operating Accumulator.Notice for maintenance job.Notice to be paid when doing disassembly, assembly, and discarding.Foreign Exchange and Foreign Trade Law, Japan
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