OS490 is a direct replacement for V-490-D and it is a direct replacement. Since this ink is pigmented ink it is recommended to drain the original fluid.
OS490 has a shelf life of 6 months from date of manufacture when stored at a temperature range of +35oF to +95oF (+2oC to +35oC). Prolonged exposures to temperatures outside these limits will shorten the ink shelf life. If there is a possibility that the ink has been frozen during shipping, bring to room temperature (+70oF to +75oF or 21oC to +24oC) and shake well before using.