Monthly Preventive Maintenance Checks and Services Chart

TM 11-5985-284-15

3-9. Monthly Preventive Maintenance Checks and Services Chart

Item to be inspected

Procedure

References

AT-1082/PRC, ex-

Repaint if necessary - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Para 3-10.

terior surfaces.

Cover assembly

Put small amount of silicone grease on its surface - - - - - - -

a. Fig. 2-3,

----

gasket.

para 3-11a.

b. Replace lf necessary - - - - - - - - - - - - - - - - - - - - - - - - - - - - - b. Para 3-11a.

Screws - - - - - - - - - - - - - - - - Tighten screws holding knobs of controls and cover assembly - - - - - - -

Sense whip antenna - - - - Replace if it does not retract fully, is bent, or comes free - - - - - - - - - - Para 3-11b.

CW-445/PRC . . . . . . . Inspect for tears, mildew, fraying, and attachment to strap - - - - - - - - Fig. 1-1.

(3) Lay the new gasket over its track on the

3-10. Touchup Painting

cover and press it into place.

a. When the finish on the case has been badly

(4) With the fingers, spread a thin coating of

scarred or damaged, rust and corrosion can be

silicone grease on the surface of the

prevented by touching up the bared surfaces. Use

gasket.

No. 000 sandpaper to clean the surface down to the

(5) Place the cover on the case, making sure

bare metal and to obtain a smooth finish.

that the gasket is seated properly, and

Caution: Do not use steel wool. Minute par-

tighten the cover down with its six cap-

ticles may enter the case and cause harmful

tive screws.

internal shorting or grounding of the circuit.

b. Sense Whip Antenna. TO replace a whip an-

b. When a touchup job is necesary, apply paint

tenna in the loop antenna assembly, proceed as

with a small brush. Remove rust from the case

follows:

by cleaning corroded metal with cleaning com-

pound. In severe cases, it may be necessary to use

(1) Set the loop antenna (3, fig. 4-6), in op-

cleaning compound to soften the rust, and sand-

erating posit ion.

paper to complete the preparation for painting.

(2) Hold the loop antenna and loosen the

Paint used will be authorized and consistent with

whip antenna assembly nut (22) with a

existing regulations (TB SIG 364).

hexagonal wrench. Completely unscrew

the nut, and remove the telescoping whip

3-11. Replacement of Parts

antenna (21 ).

(fig. 2-3)

(3) Apply a thin layer of silicone grease to

the threads on the assembly nut of the

For parts replacement, prepare a clean, flat work

sense whip antenna to be mounted. Par-

surface for the unit. Thoroughly wipe off dirt,

tially place the assembly into position on

grease etc., particularly if found between the

cover and the case. Use an airhose, if necessary.

the loop antenna. Extend the sense whip

a. Cover and/or Cover Assembly Gasket. To

antenna from its assembly, and screw

replace the cover and/or the cover assembly gas-

the assembly nut in place by band; then,

ket, proceed as instructed below. (For lubrica-

tighten the nut with the hexagonal

tion only, omit the procedures given in (2) and

wrench.

(3) below:)

c. Control Knobs. Use the following procedure

(1) Loosen the six captive screws that hold

for replacement of the 13 BANDSWITCH, FINE

the cover assembly, and remove the cover

TUNE, and the ATTENUATOR control knobs.

assembly from the case.

(1) Note the position of the control knob

(2) Pull the gasket from the cover.

(for example: BANDSWITCH set to

Caution: Do not stretch the gasket

30).

by pulling it from one point to another

(2) Remove the screw that, holds the control

during its installation.

knob in position.

3-5