OPERATOR AND ORGANIZATIONAL MAINTENANCE
Section I. OPERATOR'S MAINTENANCE
intervals. These checks and services are to maintain
Scope of Operator's Maintenance
Army electronic equipment in combat-serviceable
The maintenance duties assigned to the operator of the
condition; that is, in good general (physical) condition
SM-442A/GRC are listed below, together with a
and in good operating condition. To assist operators in
reference to the paragraphs which cover the specific
maintaining combat serviceability, the chart indicates
what to check, how to check, and the normal conditions;
a. Operators daily preventive maintenance checks
the references column lists the paragraphs that contain
and services chart (para 4-4).
detailed repair or replacement procedures. Where no
b. Cleaning (para 4-5).
entry exists in the reference column, the defect cannot
be remedied by the operator; therefore, higher category
of maintenance or repair is required. Records and
a. Cleaning Compound (Federal stock No. 7930-
reports of these checks and services must be made in
accordance with the requirements set forth in TM 38-
b. Cleaning cloth (lint-free).
c. Fine sandpaper.
c. Preventive Maintenance Checks and Services
Periods. Preventive maintenance checks and services
Operator's Preventive Maintenance
of the SM-442A/GRC are required daily. Paragraph 4-4
Operator's preventive maintenance is the systematic
specifies checks and services that must be
care, servicing, and inspection of equipment to prevent
accomplished daily and under the special conditions
the occurrence of trouble, reduce downtime, and assure
listed in (1), (2), and (3) below:
that the equipment is serviceable.
(1) When the equipment is initially installed.
a. Systematic Care. The procedures given in
(2) When the equipment is reinstalled after
removal for any reason.
and cleaning essential for proper equipment operation
(3) At least once each week if the equipment
is maintained in a standby condition.
b. Preventive Maintenance Checks and Services.
The preventive maintenance checks and services chart
(para 4-4) outlines functions to be performed at specific
Operator' Daily Preventive Maintenance Checks and Services Chart
Item to be
Exterior surfaces -----------------
Clean exterior surfaces of units which comprise SM-
Intercabling and connectors
Check all interconnecting cables and connectors for
cracks and breaks. Replace cables that have cracks
or broken connectors.