TM 11-6140-203-14-3
CHAPTER 4
ORGANIZATIONAL MAINTENANCE
4-1. Scope of Organizational Maintenance
The maintenance duties assigned to the operator's of end item which are powered by nonaircraft nickel-cadmium
batteries, and organizational maintenance personnel for nonaircraft nickel-cadmium batteries are listed below,
together with a reference to table or paragraphs covering the specific maintenance functions. Test equipment, tools,
and supplies required for the performance of organizational maintenance are listed in paragraph 4-2.
a.
Operator daily preventive maintenance checks and services (at the equipment site) are limited to making
sure that the battery case, cover and the top of the cells are kept clean and free of potassium carbonate deposits Sara
4-7) and, during operation of the end item of equipment, being alert for any indications which signal battery
malfunction.
b.
Organizational weekly preventive maintenance checks and services for the BB-693A/U only (see para 4-
5).
c.
Organizational quarterly maintenance is limited to removal of the battery from the equipment and
returning it to higher category of maintenance for reconditioning. The battery must be returned to higher category
maintenance for reconditioning if is has been through 100 cycles (discharged through normal operation (or for any
other reason intentional or accidental) and recharged) prior to 2 the scheduled quarterly maintenance date. Do not
allow the battery to remain in operation longer than the 120-day period or 100 cycles since its storage capacity will be
greatly impaired and the duration of equipment operation severely limited.
d.
Visual inspection (para 4-6).
e.
Touchup painting (para 4-8).
f
Electrolyte level check (para 4-9).
g.
Electrical leakage test (para 4-10).
h
Terminal screw torque (para 4-11).
i.
Organizational repair (para 4-12).
4-2. Test Equipment, Tools, and Supplies
The following test equipment, tools, and supplies are required for organizational maintenance.
a.
Test Equipment. Multimeter AN/USM-223.
b.
Tools. Tool Kit, Battery Service TK-90/G.
c.
Supplies. Lint-free cloth (item 1, app E).
4-3. Preventive Maintenance
Preventive maintenance is the systematic care, servicing, and inspection of nickel-cadmium batteries to prevent
occurrence of trouble, reduction of downtime, and insurance that the equipment is serviceable.
a.
Systematic Care. Procedures given in paragraphs 4-6 through 4-11 cover routine systematic care and
cleaning essential to the proper upkeep of the equipment.
b.
Preventive Maintenance Checks and Services. The preventive maintenance checks and services instructions. contained
in paragraph 4-la and 4-1c, and paragraph 4-5 outline functions to be performed at specific intervals. These checks
and services are to maintain nickel-cadmium batteries in a combat-serviceable condition; that is, in good general
(physical) condition and in good operating condition. To assist operator and maintenance personnel in maintaining
combat serviceability, the maintenance guidance indicates what to check, how to check, and the normal indications.
The procedure information, where applicable, lists the paragraphs or manuals that contain detailed repair or
replacement procedures. If the defect cannot be remedied by performing the corrective actions listed, a higher
category of maintenance or repair is required. Records and reports of these checks and services must be made in
accordance with requirements given in
4-4. Organizational Preventive Maintenance Checks and Services
Organizational preventive maintenance checks and services of the nickel-cadmium batteries are required daily, and
in addition to daily, quarterly (or every 100 discharge-charge cycles) whichever shall occur first.
a.
Paragraph 4-la specifies checks and services that must be accomplished daily.
b.
c.
Paragraph 4-1c specifies additional checks and services that must be performed quarterly (or every 100
discharge-charge cycles) whichever shall occur first.
4-5. Weekly Preventive Maintenance Checks and Services for BB-693A/U ONLY
Perform the following preventive maintenance checks and services for the BB-693A/U only on a weekly basis.
Performance of this procedure does not exempt the battery from the required quarterly (or 100 discharge-charge
cycle) maintenance.
NOTE
Weekly Preventive Maintenance Checks and Services for BB-693A/U is only required if battery power has
been used during the previous week.
a.
With the BB-693A/U mounted in the vehicle, use the APU or vehicle generator system to charge the
battery and monitor charging current until the charging current remains steady for one hour. Set charging
voltage using 1% meter to the following values at the ambient temperatures given:
(1)
Above 800 F.-28V.
(2)
Between 32-F.-80F.-28.5V.
(3)
Below 320 F.-29V.
b.
Allow the battery to rest (stand) for not less than
4-1
