Lesson 3
PERFORM OPERATOR'S MAINTENANCE CHECKS AND SERVICES
OBJECTIVE
After completing this lesson, you will be able to perform operator's preventive maintenance checks and services
(PMCS) on radio set AN/PRC-104.
REFERENCES
This subcourse is based on the contents of TM 11-5820-919-12 and other materials approved for US Army
instruction. However, development and progress render the text continually subject to change. Therefore, base
your examination answers on material presented in this subcourse rather than on individual or unit experience.
14. INTRODUCTION. Preventive maintenance is the systematic inspection and servicing of the radio set to
prevent equipment failure. This reduces downtime and ensures that the radio set is fully mission capable when
needed. This lesson contains daily and weekly checks and services, cleaning instructions, and corrosion control
instructions.
15. OPERATOR'S DAILY AND WEEKLY PMCS. As the operator, you are responsible for daily and weekly
PMCS. Although not mentioned specifically as either daily or weekly PMCS, you also are required to keep the
radio set clean. You should keep in mind that the reason you pull the PMCS is so you can keep your radio set
operational. Keeping the radio set clean is just as important.
a. The radio set should be cleaned whenever it is necessary. You should do the following:
Remove dirt, dust, grease, or other debris from external surfaces by using a cloth or brush
moistened in clear water. Dry the equipment with a soft, lint-free cloth.
Clean any dust or dirt from the connectors and pins with a soft-bristled brush.
b. The daily and weekly PMCS are listed in Table 5. The operator will perform the daily PMCS when
the equipment is operated. The operator will perform weekly PMCS if the equipment is not operated daily.
However, daily PMCS also is performed whenever weekly PMCS is performed. When you are performing
PMCS and you find items that are broken or damaged beyond repair, report it to the next higher maintenance
level. Any deficiencies you can't correct must be reported on DA Form 2404.
NOTE: Operator's PMCS should be performed before, during, and after operations as appropriate with the checks
or services to be performed.
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