TM 11-6625-828-12
CHAPTER 4
MAINTENANCE
NOTE
Sealing and locking compounds have been used in this equipment. Do not apply torque to check
bolts, screws, or nuts for tightness.
4-3. Preventive Maintenance.
4-1. Scope of Maintenance
Preventive maintenance is the systematic care,
The maintenance duties assigned to the operator of Test
servicing, and inspection of equipment to prevent the
Set, Radio AN/ARM-A are listed below together with a
occurrence of trouble, to reduce downtime, and to assure
reference to the paragraph covering the specific
that the equipment is serviceable.
maintenance function. These duties do not require
a. Systematic Care. The procedures given in
special tools or test equipment.
a. Daily preventive maintenance checks and services
care and cleaning essential to proper upkeep and
b. Quarterly preventive maintenance checks and
operation of the equipment.
b. Preventive Maintenance Checks and Services.
services (para 4-6).
c. Cleaning (para 4-7).
The preventive maintenance checks and services charts
d. Lubrication (para 4-9).
specific intervals. These checks and services are to
e. Troubleshooting (para 4-10).
maintain Army electronic equipment in a combat
f. Repairs and adjustments.
serviceable condition; that is, in good general (physical)
(1) Replacement of indicator lamp (para 4-13a).
condition and in good operating condition. To assist
(2) Replacement of fuses (para 4-13b).
operators in maintaining combat serviceability, the charts
indicate what to check, how to check, and what the
4-2.
Special Tools and Equipment Required for
normal conditions are; the References column lists the
Maintenance
illustrations, paragraphs, or manuals that contain
a. Tool Equipment. The only tool equipment required
detailed repair or replacement procedures. If the defect
is Tool Kit Electronic Equipment TK-101/G (NSN
cannot be remedied by performing the corrective action
5180100610~177).
indicated, higher category of maintenance or repair is
b. Special Tools. No special tools are required for
required. Records and reports of these checks and
maintenance of the Test Set, Radio AN/ARM-A.
services must be made in accordance with the
c. Test Equipment. The only test equipments
requirements set forth in TM 38-750.
required
are
AN/USM-223
(NSN
662500~999-7465).
4-4. Preventive Maintenance Checks and Services
WARNING
Periods
The fumes of Trichloroethane are
Preventive maintenance checks and services of the
toxic. Provide thorough ventilation
AN/ARM-5A are required daily and quarterly.
whenever used. DO NOT USE NEAR
AN OPEN FLAME. Trichloroethane is
must be accomplished daily and under the special
not flammable, but exposure of the
conditions listed below:
fumes to an open flame or hot metal
(1) When the equipment is initially prepared for use.
forms highly toxic phosgene gas.
(2) At least once each week if the equipment is
d. Material. Trichloroethane is required for cleaning
maintained in standby condition.
the equipment and electrical contacts.
services that must be performed quarterly.
Change 1 4-1
