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Figure 5-2. Electrolyte Level Adjustment.
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TM-11-6140-203-14-4-P Nickel-Cadmium Battery BB-693A/U Manual
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Figure 5-3. Maintenance Flow Chart Quarterly for Nickel-Cadmium Battery BB-693A/U.



TM 11-6140-203-14-4&P
(3) Check  polarity  position  of  cells  in
c. Deep discharge and balance using one of the
accordance with procedures of paragraph 5-4c.
procedures given below. Use of the discharge fixture is
(4) Inspect for tightness of terminal studs.
the preferred method.
(1) Discharge fixture method.
(5) Check heater resistance by following
procedures in paragraph 5-13a.
(a) Position the discharge fixture NSN
b. Perform electrical leakage test as specified in
6110-00-014-6225 over an uncovered battery.  Push
paragraph 4-10. If battery has a leakage current of over
down firmly on the discharge fixture until it  uniformly
3 milliamperes it must be deep discharged  before
covers the battery case (fig. 5-4).
(b) Clamp the battery case catches on
disassembly.
the strikes of the discharge fixture bottom plate.
NOTE
(c) Leave the discharge fixture on the
Refer  to  TM  11-6140-203-14-1  for
battery for 16 to 18 hours, or for 8 hours after the light
information concerning the temporary
on  the fixture is extinguished.  Remove discharge
lows  of capacity of a nickel-cadmium
fixture only after battery is fully discharged.
battery
and the discharge method
recommended
to restore the rated
capacity to the nickel cadmium battery.
5-8


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