Cleaning - TM-11-6625-601-340050

TM 11-6625-601-34

Parts. A plastic part is not serviceable if any

CAUTION

of the following conditions exist: cracks, dents,

To avoid air blasting of small leads and

bulges or scratches; signs of insulation break-

other delicate components, do not place

down or flashover; or badly worn or broken

air nozzle too close to chassis. Exercise

threads in tapped holes.

care not to disturb the dress of wiring

a n d cables except where absolutely

j. Window, Filters, and Lenses. A w i n d o w

necessary. In the event it is necessary,

filter, or lens is not serviceable if any of the

the dress should be noted. Upon com-

following conditions exist: cracked or chipped

pletion of the cleaning operation, wir-

markings.

ing and cables should be restored to

their original position or dressed to pre-

2-23. Cleaning

vent misalignment and malfunctioning

of the equipment.

WARNING

Remove dust and dirt from all surfaces

The fumes of trichloroethane are toxic.

using a soft brush and an air jet. Com-

Provide thorough ventilation whenever

plete chassis cleaning by wiping all

used. DO NOT use near an open flame.

finished surfaces with a lintless cloth,

moistened with trichloroethane. Dry

Trichloroethane is not flammable, but

and polish chassis surfaces using a dry,

exposure of the fumes to an open flame

clean, lintless cloth. Protect chassis

converts the fumes to highly toxic dan-

from dust and moisture during storage.

gerous gases.

This paragraph contains procedures for

d. Coaxial Connector Contacts. Clean coaxial

cleaning

the

assemblies,

subas-

connect contacts and insulating members by

semblies,

and

detail

parts of

wiping away dust and dirt with a lintless cloth

MK733/ARC-54. Cleaning may be done

moistened with trichloroethane. Dry with a

before or after inspection as necessary.

clean, dry, lintless cloth.

References to an air jet signify a hand-

e. Plastic Parts: M o l d e d , Extruded, and

operated air nozzle supplied with clean,

Machined. Blow loose dust from surfaces holes,

dry, compressed air at a pressure of not

and crevices and from any attached metal parts

more than 25 pounds per square inch.

usung an air jet. Wipe clean with a lintless cloth

moistened with trichloroethane. Dry and polish

a. Covered Cables. Clean outer surface of

with a clean, dry, lintless cloth.

rubber or vinylite covered cables, or conduits or

f. Rotary Switches. Clean rotary switches of

flexible, transparent vinylite, by wiping dust

the wafer type as follows: Remove dust with an

from cable surfaces and terminations with a lin-

air jet by turning switch back and forth several

t l e s s cloth moistened with trichloroethane.

times while blowing. Wash all contacts and insu-

Wipe dry with a clean, dry, lintless cloth.

lation with trichloroethane, lightly applied with

b. Connector.

a small, camels' hair brush. Dry with an air jet.

Repeat wash, using clean trichloroethane and

CAUTION

rotating switch rotor several times during the

Do not allow trichloroethane to run into

wash. Dry gently, but thoroughly with air jet.

sleeves (or conduit) covering wires or

g. Sensitive and Toggle Switches. Blow dirt

cables connected to contact terminals

from surfaces of switch bodies and attached

of the insert. Wipe dust and dirt from

mechanisms using an air jet. Wipe surfaces with

bodies, shells, coupling nuts and cable

a lintless cloth moistened with trichloroethane

clamps using a lintless cloth moistened

and dry with an air jet.

with trichloroethane. Wipe dry with a

clean, lintless cloth. Remove dust from

h. Windows, Filters, and Lenses. Clean plastic

the inserts using a small soft brush in

or glass disks, windows, filters, and lenses by

conjunction with an air jet. Wash dirt

gently wiping their surfaces with a clean, soft,

from insert, insulation and contacts

lintless cloth that has been dampened with

u s i n g a small camels hair brush to

trichloroethane. When clean, polish carefully

apply trichloroethane. Dry connectors

with lens tissue using a circular motion. If

with an air jet.

object is to be stored for any period of time, be

c. Wired Chassis.

sure surfaces are well protected.

2-22