Specifications

MARATHONNORCO AEROSPACE, INC.
NICKEL-CADMIUM AIRCRAFT BATTERIES
24-34-00
Page 602
APR 15/06
6.1 Electrolyte Level Adjustment Procedure
Insert the syringe with the appropriate nozzle into the cell opening until the shoulder of the nozzle
rests firmly on the “O” ring seat. Withdraw the plunger and check for any electrolyte in the
syringe. If the level is too low the syringe will remain empty. If the level is too high any excess
electrolyte will be drawn into the syringe until the level corresponds to the depth of the nozzle
insertion into the cell. The depth of the nozzle into the cell is the correct electrolyte level.
If the electrolyte level is too low (the syringe remained empty) draw 10 CC’s of distilled or
demineralized water into the syringe and inject it into the cell. Withdraw the plunger. If the
syringe remains empty continue injecting measured quantities of water into the cell to achieve the
correct level.
At the point where some excess electrolyte is drawn into the syringe the correct electrolyte level
for that cell has been achieved. Discharge any excess electrolyte.
The amount of water required to fill the first cell should serve as an indication of the quantity
required to fill the remaining cells. However, the electrolyte level must be independently adjusted
in each cell.
Check to see that the quantity of water added per cell does not exceed the maximum allowable
for that cell type in Table 5. If the water consumption is too high, the service interval may need to
be reduced and/or check the charging system or voltage regulator setting.