TM 5-2420-230-24-2
Batteries (013-007)
B3.9 and B5.9 Series Engines
Page 13-20
Section 13 - Electrical Equipment - Group 13
If conventional batteries are used, remove the cell caps or
covers, and check the electrolyte level.
NOTE: Maintenance-free batteries are sealed and do not
require the addition of water.
Fill each battery cell with distilled water. Refer to the battery
manufacturer's specifications.
NOTE: If water is added to the battery it must be charged
before any testing can be accomplished.
Check the "Eye" on the maintenance-free battery. Refer to
the OEM specifications.
Remove the surface charge by attaching the battery to a
300-amp load for 30 seconds for heavy-duty batteries.
Remove the load, and wait 1 minute; if the battery voltage
is greater than or equal to 12.4 VDC, continue testing. If the
voltage is below 12.4 VDC, recharge or replace the battery.
L-1278