TM 11-6140-203-14-3
(2)
Wash each fillercap thoroughly in tap water. Completely dry each filercap with a clean, dry, lint-
free cloth and compressed air as necessary.
(3)
Use the fiflercap wrench to replace each fillercap to each cell, and tighten by turning the fillercap
one-fourth turn clockwise.
f.
Foreign matter should not normally collect in the fillercap seat on the cell. To remove foreign matter
from the fillercap seat; use either of the following methods:
(1)
Remove the fillercap, e above. Use a clean, dry, lint-free cloth and very carefully remove any
foreign matter which has accumulated in the fillercap seat. Make certain that none of the foreign matter falls into the cell.
(2)
Cut the lugs off a fillercap which is going to be thrown away. Remove the fillercap from the cell (e
above). Place a clean, dry, lint-free cloth over the base of the fillercap without lugs. Place it over the fillercap seat to
be cleaned and turn the fillercap and cloth with a fillercap wrench.
4-8. Touchup Painting Instructions
a.
When the battery requires repainting, refinishing, or touchup painting, refer to Federal Standard No.
595a for a matching color. SB 11-573 lists painting tools and miscellaneous supplies required for painting.
b.
Refer to TB 43-0118 for instructions on painting and preserving Electronics Command equipment.
When touchup painting, a perfect match with the original paint surface may not be possible because of a change in
the is original pigment as a result of oxidation and differences in manufacture. The prevention of corrosion and
deterioration is the most important consideration in touchup paint- ing; appearance is secondary. However, this does
not mean that appearance of the equipment is not important. Touchup painting should be accomplished neatly and
competently. Inspection personnel in the field should make allowances for slight color mismatch where minor
touchup has been done, but not for neglect, unskillful manner, or in cases where the need for refinishing is obvious.
c.
When the finish on the battery box has become badly scarred or damaged, rust and corrosion can be
pre- vented by touching up the bare surfaces. Use a very fine sandpaper to clean the surfaces down to the bare
metal. Obtain a bright smooth finish.
d.
Spray one coat of zinc chromate primer (NSN 8010-00-514-1861) (item 2, app E) to the smooth finish.
When dry, apply one or two thin coats of olive drab, semi-gloss paint (NSN 8010-00-598-5936) (item 3, app E) to protect
the battery box from further corrosion.
4-9. Electrolyte Level Check
Electrolyte level check should be performed only after the battery has been fully charged and allowed to rest a minimum of
30 minutes but not more than 2 hours. If the battery has been at rest beyond the maximum limit, it must be fully recharged
and allowed to rest before at-tempting to check the electrolyte level. This is necessary because the apparent electrolyte level
drops with time after charge.
a.
Remove the battery case cover.
b.
Remove the battery fillercaps.
c.
If the electrolyte level can be seen above the cell plates by looking into the cell fillercap openings, replace
battery fillercaps and battery case cover. If electrolyte can- not be inspected visually, proceed to d below.
d.
If the electrolyte level cannot be checked visually because of the battery location, proceed as follows:
(1)
Insert a clean 1/s-inch diameter, 6-inch long piece of plastic tubing or ordinary drinking straw (NSN 7350-
00-290-2887 or NSN 7530-00-271-1683) into the cell and lower it until the tubing or straw touches the baffle or the tops of the
plates. Cover the opposite end of the tubing or straw with the index finger to create a partial vacuum.
(2)
Raise the tubing or straw to the cell fillercap seat. While observing the end that was inserted into the
cell, remove the finger from the other end to release the vacuum and any electrolyte that may be trapped in the tubing or
straw.
(3) If any electrolyte drips from the tubing or straw, replace the battery fillercap and go to the next cell and
perform the procedure described in (1) and (2) above.
e.
If electrolyte is not found in all cells of the battery while performing the visual procedure in c above or the tubing
check in d above, remove the battery from service, install a replacement battery, and evacuate the battery to direct support
maintenance. NEVER will organizational maintenance personnel add to or remove distilled water or electrolyte from the
battery.
4-10. Electrical Leakage Test
a.
Disconnect the battery for the equipment it powers at the battery receptacle.
b.
Set the AN/USM-223 function switch to DC MA position.
c.
Plug the black test lead into the COM jack.
d.
Plug the red test lead into the 10A jack.
e.
Place the red test probe of the AN/USM-223 to the positive terminal of the battery. If the battery case is metal,
place the block test probe of the AN/USM-223 to a clean, paint-free surface of the battery case such as the latches. If the
battery case is not metal, place the black test probe on internal metal support raises, latches, etc. or on a paint-free metal
surface on which the battery case is mounted.
f.
If the meter pointer indicates more than 2.5 amperes, record the meter indication and proceed to l below.
g.
If the meter pointer indicates less than 2.5 amperes, remove the test probes from the battery and the battery
case or metal surface. Move the red test probe from the AN/USM-223 1OA jack to the V- f -A jack place the range switch in
the 2500 position.
h. Reconnect the AN/USM-223 test probe as described in e above.
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