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An Easy Way to Find a Suitable Amount of Top-Up Oil

[+] Author Affiliations
Akira Sasaki, Hideaki Tobisu, Shinji Uchiyama, Mariko Kawasaki

KLEENTEK Corporation, Tokyo, Japan

Paper No. WTC2005-64143, pp. 571-572; 2 pages
  • World Tribology Congress III
  • World Tribology Congress III, Volume 1
  • Washington, D.C., USA, September 12–16, 2005
  • Conference Sponsors: Tribology Division
  • ISBN: 0-7918-4201-0 | eISBN: 0-7918-3767-X
  • Copyright © 2005 by ASME


All hydraulic and lubricating oils are formulated with oxidation inhibiting additives. When oxidation-inhibiting additives are depleted, oil oxidation progresses, TAN raises and varnish is produced. In order to know depletion of oil oxidation inhibitors, RBOT [1] and voltammetric analysis [2] have been used. However these analyses did not tell us how much top-up of new oil is needed or sufficient. This paper demonstrates a simple method to know how much top-up is sufficient to use the oil without having varnish problems.

Copyright © 2005 by ASME



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