Immediately after taking the battery off charge, check electrolyte levels in each cell. Cells toward the center of the battery tend to require a bit more water, due to heat retention as a result of isolation, than do cells located adjacent to the outside of the battery tray assembly where cooling becomes more effective.

Each cell should be checked and if necessary, the levels adjusted to just touch the bottom of the cell cover vent-well extension tube - no higher and no lower

Following the procedures outlined, and understanding the effects of heat and electrolysis relative to electrolyte expansion, the industrial motive power battery can now be properly watered using any of a number of automatic single cell fillers presently on the market.