BLUF: Maintenance instructions for the 4HN 24V flooded, lead-acid turret battery are being added to the TMs. Until then, operators need to do regular PMCS on their vehicle's batteries.
Maintenance instructions have not yet been added to the M2A4 and M7A4 BFIST Bradley TMs for the 4HN 24V flooded, lead-acid turret battery, NSN 6140-01-390-1968.
Until they are, here’s some info that crewmen and maintainers need to know:
- Operators should check the turret battery voltage as part of weekly PMCS.
- Operators should turn off the turret battery unit during vehicle operation if there’s a rotten egg odor in the turret compartment. That odor could indicate that a battery is overheating or leaking.
- Maintainers should service turret batteries as necessary, as well as check the condition of new batteries before releasing them to the field.
Detailed instructions for performing all of the above tasks are in the Turret Battery Unit Support Screening Procedure, which is attached to TACOM Maintenance Information Message 22-039 HERE.