John Deere TY25864 User Manual download pdf (Page 16)

Controls and Operation

OUOD006,0000058 –19–17AUG04–1/1

Activating and Charging a Dry Battery

Listed below are six steps to activate a dry-charged

battery.

1. Remember Safety. Always wear protective

glasses, gloves, and clothing when handling

batteries and sulfuric acid electrolyte.

2. Prepare the Battery. Remove vents and date code

punch outs. If the battery or electrolyte is below

60°F, activation will be slower.

3. Add Electrolyte. Fill each cell with electrolyte until

the level just touches the bottom of the “split vent”

at the bottom of the vent well. Do not over fill by

covering the split. If the split is covered, the gases

created during charging will not escape properly,

and will cause increased splashing and acid loss.

Under filling can reduce the performance and life of

the battery.

4. Let the Battery Absorb the Acid. It takes time for

the battery plates and separators to absorb the

acid. A 15 to 30 minute stand time before charging

is recommended. Gentle rocking of the battery will

help dislodge trapped air bubbles.

5. Charge the Battery. Charge the activated battery

to ensure that it starts its life at 100%

state-of-charge. Activated batteries should be

charged at no more than 1% of CCA for 30

minutes, and up to 6 hours in cases of extremely

high humidity storage. For example, a 625 CCA

battery should be charged at 6 amps. Reduce the

charging rate if excessive gassing occurs.

Charging is recommended when:

a. The voltage of the activated battery is below

12.4 volts, even after 15 minutes stand time.

b. The battery will not be installed within the next

30 days.

c. The outside temperature is below 32°F.

d. The battery has been in storage for more than

two years.

6. Top off the Electrolyte Level. Add electrolyte as

required to bring the level back up to the bottom of

the split vent in the bottom of the vent well. The

acid level may have dropped due to absorption into

the plates and separators. Replace the service

vents.

Service hints for longer battery life:

• Add only pure drinking water or distilled water to the

battery after it is placed in service.

• Disconnect the ground cable when the vehicle is

stored for more than three months. Cleaning the

battery top, adding water, and charging the battery

before vehicle storage will reduce discharge and

sulfation battery failures.

• Specific gravity is the best indicator of battery

state-of charge.

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John Deere TY25864 User Manual Page 16

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