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TM 11-6625-2478-12
CHAPTER 4
ORGANIZATIONAL MAINTENANCE
b. Preventive Maintenance Checks and Services.
4-1. Scope of Maintenance
The preventive maintenance checks and services
The maintenance duties assigned to the organizational
chart (tables 4-2 through 4-5) outline functions to be
repairman of Test Set, Control Monitor-Re- cording
performed at specific intervals.  These checks and
Head AN/AYM-9 are listed below, together with a
services are to maintain the equipment in serviceable
reference to the paragraphs covering the specific
condition; that is, in good physical condition, and in good
maintenance functions.
The tools and materials
operating condition. To assist maintenance personnel in
required for maintenance are listed in table 4-1.
a. Daily preventive maintenance checks and
maintaining serviceability, the charts indicate what to
check, how to check and the normal condition; the
services (table 4-2).
Reference column lists the paragraph that contains
b. Weekly preventive maintenance checks and
additional information. If the defect cannot be remedied
services (table 4-3).
by the organizational repairman, higher category of
c. Monthly preventive maintenance checks and
maintenance is required. Records and reports of these
services (table 44).
checks and services must be made in accordance with
d. Quarterly preventive maintenance checks
the requirements set forth in TM 38-750.
and services (table 4-5).
4-4. Preventive Maintenance Checks and
e. Cleaning (para 4-5).
Services Periods
f. Touchup painting (para 4-6).
g. Troubleshooting (para 4-7).
Preventive maintenance checks and services of the
h. Lamp removal and replacement procedures
equipment are required on a daily, weekly, monthly and
quarterly basis.
i. Switch knob removal and replacement (para
specifies the checks and services that must be
4-).
accomplished daily and under the following conditions
4-2. Tools and Materials Required
(1) When the equipment is initially installed.
(2) When the equipment is reinstalled after re-
Tools  and  materials  required  for
organizational
moval for any reason.
maintenance are listed in table 4-1.
(3) At least once each week if the equipment is
maintained in standby condition.
Table 4-1. Tools and Materials Required
b. Table 4-3 specifies additional checks and ser-
Tools or material
Federal stock No.
vices that must be performed weekly.
c. Monthly preventive maintenance checks and
Cleaning compound
services are specified in table 4-4. A month is de- fined
trichloroethane............................ 6810-664-0273
as approximately 30 calendar days of 8-hour- per-day
Cleaning cloth
operation. If the equipment is used more often or under
Cleaning brush
adverse conditions, the monthly preventive maintenance
Fine sandpaper ............................... 53505-0124
checks and services should be performed at 20- or 15-
Tool Kit TK-1OI/G ........................... 51804-5178
day intervals. Adjustment of the maintenance interval
must be made to compensate for any unusual operating
4-3. Preventive Maintenance
conditions. Equipment maintained in a standby (ready
for immediate operation) condition must have monthly
Preventive  maintenance  is  the  systematic  care,
preventive maintenance checks and services perform-
servicing, and inspection of equipment to prevent the
ed on it. Equipment in limited storage (requires service
occurrence of trouble, to reduce downtime, and to insure
before operation) does not require monthly preventive
that the equipment is serviceable.
a. Systematic Care. The procedures given in tables
maintenance.
d. Quarterly preventive maintenance checks and
4-2 through 4-5 cover routine systematic care and
services are listed in table 4-5.
cleaning essential to proper upkeep and operation of the
equipment.
4-1

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