Lesson 7
PERFORM OPERATOR'S PREVENTIVE MAINTENANCE CHECKS
AND SERVICES ON AN/GRC-213
OBJECTIVE
After completing this lesson, you will be able to perform PMCS on radio set AN/GRC-213.
REFERENCES
This lesson is based on the contents of TM 11-5820-923-12 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 the material presented in this lesson rather than on individual or unit experience.
34. INTRODUCTION. The performance of maintenance and troubleshooting of this radio set is very
important. It can mean the difference between being able to complete a mission and not being able to. As a
result, you should place emphasis on performing the preventive maintenance and being able to troubleshoot the
radio set if a fault should occur. In this lesson, you will learn what preventive maintenance you are required to
perform and know what the troubleshooting procedures are for the radio set.
35. OPERATOR'S PREVENTIVE MAINTENANCE. Operator's preventive maintenance includes, but is not
limited to, cleaning, corrosion control and performance testing. These checks and services are performed on a
regular basis. The frequency with which PMCS should be done is listed in Table 9. Even though these tasks
might seem unimportant and trivial, you should keep in mind that the reason you perform preventive maintenance
is to keep the radio set operational. Lack of proper preventive maintenance is the cause of equipment failure more
often than not. Preventive maintenance should be performed as follows:
a. Cleaning. You should remove dirt dust, grease, or any debris from the external surfaces by using a
cloth or brush moistened in clear water. Rinse the equipment by using a clean cloth moistened in clean, clear
water. Dry it off with a soft, lint-free cloth. Clean any dust and dirt from the connectors and pins by using a soft-
bristled brush.
b. Corrosion control. You should check the radio set for any signs of corrosion or fungus. This should
be done when you are operating or preparing for a mission. Corrosion and fungus can damage or destroy
equipment in a short amount of time. When the equipment is not being used, you should separate the components
and check the connectors, latches, and cables for any signs of this. When you are operating, you can check what
is visible. If there are any signs of corrosion or fungus, they should be removed with a cloth or a brush moistened
with a cleaning solvent, usually trichlorotrifluoroethane. Cleaning solvents should be used in a well-ventilated
area. They can be damaging to your health if not used properly. When you have cleaned the corrosion or fungus
off, you should repaint any areas that are supposed to be painted. This will help to prevent it from reappearing.
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