Operator's Preventive Maintenance Checks and Services Periods

b. Preventive Maintenance Checks and Services.

set forth in TM 38-750.

Add paragraphs 13.1, 13.2, and 13.3 after

The preventive maintenance checks and services

paragraph 13.

chart (para. 13.2) outlines functions to be per-

formed at specific intervals. These checks and

13.1. Operator's Preventive Maintenance

services are to maintain Army electronic equip-

ment in a combat serviceable condition; that is, in

Checks and Services Periods

good general (physical) condition and in good

Preventive maintenance checks and services on

operating condition. To assist operators in main-

the AN/GRA-50 are required on a daily basis.

taining combat serviceability, the chart indicates

Paragraph 13.2 specifies services and inspections

what to check, how to check, and what the normal

that must be accomplished daily and under special

conditions are. The References column lists the

conditions listed below.

illustrations, paragraphs, or manuals that contain

a. When the antenna is initially installed.

detailed repair or replacement procedures. If the

b. When the antenna is reinstalled after being

defect cannot be remedied by the operator, higher

taken down for any reason.

echelon maintenance or repair is required. Re-

c. At least once each week if the antenna is

cords and reports of these checks and services

maintained in standby condition.

must be made in accordance with the requirements

e. Starting with the broken end, rewind the

13.3. Cleaning

wire onto the reel assembly.

Inspect all components. They must be free of

Page 15 (as changed by C 2, 4 Sep 63). Delete

dirt, grease, and fungus.

figure 8.

Warning: Cleaning Compound (Federal stock

Page 16 (as changed by C 2, 4 Sep 63). Delete

No. 7930-395-9542( is flammable and its fumes are

figure 9.

toxic. Do not use near a flame; provide adequate

Page 17 (as changed by C 2, 4 Sep 63). Delete

ventilation.

paragraph 17 and substitute:

a. Remove grease and fungus from the antenna

assembly. Use a cloth dampened (not wet) with

17. Organizationl Preventive Maintenance

cleaning compound.

b. Remove dirt from components with a brush.

a. Preventive maintenance is the systematic

care, inspection, and servicing of equipment to

Add paragraph 14.1 after paragraph 14.

maintain it in serviceable condition, prevent

14.1. Replacing Broken Wire Ends

breakdowns, and assure maximum operational

capability. Preventive maintenance is the responsi-

If the looped end of one of the wires (shown

bility of all echelons concerned with the antenna

under the outer wingnuts in fig. 5) breaks off,

replace it as follows:

assembly and includes the inspection, testing, and

a. Loosen the wingnut and remove the broken

repair or replacement of components that inspec-

loop.

tion and tests indicate probably would fail before

b. Unwind all the wire from the reel assembly.

the next scheduled periodic service. Preventive

c. Remove the outer wingnut from the reel

maintenance checks and services on the antenna

assembly (fig. 6) and slip off the looped end.

assembly at the second echelon level are made at

d. Slip the loop under the wingnut (a above)

monthly intervals unless otherwise directed by the

and tighten the nut.

commanding officer.