MAINTENANCE OF BATTERIES
If, after charging, it is noted that the specific gravity reading of one cell is 30 points less than any of the other cells, it may be assumed that the cell is bad and that the battery should be replaced. If all cells are uniform but not up to full charge, a low rate of charge should be attempted for an extended time. This usually will recover a badly sulfated battery.
Replacing a Battery
If it is necessary to replace a battery, and a dry charge battery is used, the following procedure applies:
1. Fill the battery with electrolyte of the proper specific gravity.
2. Place the battery on charge according to the manufacturer's instructions.
It is essential that the second step above be followed to ensure that the battery going on the vehicle is fully charged.
It is also very important that the battery hold-downs be checked periodically to insure that the batteries are properly positioned to avoid vibration problems, breakage of cables or terminals. Care must be taken to avoid cracking or breaking containers or covers by tightening hold-down fixtures excessively. They also must not be so loose that breakage results from a hold-down that is too loose.