(8) The eighth Quarterly PM check involves mountings. A check is to be made that
all bolts, nuts, and washers are correctly positioned and properly tightened. Also check for
cracked, bent, or broken brackets.
(9) The next check is to insure that plugs and sockets are clean and intact. Cleaning
can be accomplished with a brush.
(10) Check ten is an operational check of the radio set. The checks performed are the
same as those performed in the operator's daily PM checks.
(11) The last Quarterly PM check is of the spare parts. Check all operator and
organizational spare parts for general condition and method of storage. There should be no
evidence of overstock, and all shortages must be on valid requisitions. A complete list of spare
parts is given in paragraph 1-6 in TM 11-5820-540-12.
Organizational monthly and quarterly preventive maintenance checks and services are
performed by organizational maintenance men. Along with the monthly and quarterly PM
checks, the organizational repairman is responsible for sectionalization of faults, loop testing,
tube replacement and replacement of certain modules. Performance of organizational
maintenance requires the use of tools and test equipment which were not required to perform
operator's maintenance. Weekly and monthly PM checks constitute a part of the quarterly PM
and must be performed concurrently. Any defect that cannot be remedied by an organizational
repairman, should be sent to a higher category of maintenance for repair.
This completes the portion of this lesson involving organizational monthly and quarterly
preventive maintenance checks and services. When you are satisfied that you understand this
material, proceed to Lesson Exercise 2.