Cleaning Procedures for Cold Weather Operations

TM 9-1240-369-34

Use a camel hair brush to remove loose

visual inspection. the system self-test is performed to

particles of dust and lint from glass surfaces. Then.

insure the serviceability of the entire system.

wipe the surface in a circular motion using lens tissue-

(4) The complete inspection is performed for

either dry or moistened with methyl or ethyl alcohol. If

an initially received laser range finder system to insure

dirt, lint. or smears remain on the glass, wrap a piece of

that it is not damaged. This inspection, including the

lens tissue around the end of an orange stick (or

system self-test, is also performed weekly to make sure

equivalent) to form a swab. Beginning at the center of

the system is maintained in a state of operational

the surface, swab with a (circular motion while applying a

readiness.

e. General Painting Instructions. Visually inspect

light downward pressure. Gradually increase the radius

of the area being cleaned until the entire surface has

unit housings and attaching hardware for rust or

been covered. If necessary, use a rubber syringe to

corrosion and missing, chipped or blistered paint. Small

blow off any remaining dust or lint.

areas of damaged paint may be touched lip as part of

(4) Other. Use a dry rag to remove loose dirt,

user preventive maintenance. When painting with a

dust or debris. Flush off caked mud using clean water.

brush, apply the paint as issued or after thinning with not

c. Cleaning Procedures for Cold Weather

more than 5 percent by volume of thinner.

Operation.

(1) If the temperature is below 320 F, add

CAUTION

glycerin to cleaning water. This will prevent it from

Optical elements, bearings, rubber, or

freezing on the part being cleaned and possibly

other components which might be

preventing normal operation of the laser system.

damaged by cleaning, masking or

(2) Alcohol, applied with a lens tissue, may be

paint must be removed from the units

used to clean glass surfaces if dry lens tissue does not

before proceeding.

work satisfactorily.

(1) Smooth surface and feather edges of

CAUTION

affected area with fine abrasive paper.

The optical elements of the laser

range finder are coated. Do not rub

WARNING

glass surfaces with rags or other

Toluol

solvent

toxic

and

materials that might scratch the

flammable.

Use only in a well-

coated surfaces and thereby degrade

ventilated area. Avoid prolonged or

system performance.

repeated breathing of the vapor.

Avoid prolonged or repeated contact

(3) If moisture has frozen on glass surfaces,

with the skin.

apply deicer or place the unit in a warm area until the ice

melts. Then pat dry the surface with clean absorbent

(2) Clean area with wiping rag dampened with

wiping rag. Clean with lens tissue when the surface is

toluol cleaning solvent.

dry.

d. Inspection.

CAUTION

(1) Conduct a visual inspection of unit

Use masking tape to insure that no

housings and attaching hardware to make sure that all

paint is applied to the following:

units are in good condition. Ensure that no moisture is

countersinks,

counterbores,

bolt

trapped around the area of the window and ballistic dust

holes, bearing surfaces, attached

cover on the receiver-transmitter unit.

surfaces, o-ring grooves, and those

(2) Replacement units should be substitute for

areas treated with solid film lubricant.

those found to be damaged or worn near or beyond

serviceable limits. Dirt, grease, and foreign matter

(3)

Apply primer and paint to the affected area

should be removed from all inspected surfaces.

according to instructions cited on the paint containers.

Preservatives and foreign matter should be removed

Air dry primer for 1/2 hour minimum. Within 2 hours

from electrical connectors. Areas in which the paint is

after application of primer, apply one coat of paint.

scratched, chipped, or worn should be repainted.

f. Lubrication.

Maintenance tasks which are not authorized for the DS

and GS maintenance personnel should be referred to the

CAUTION

responsible maintenance activity.

Lubricant should never be applied to

(3) During the visual inspection, the laser

exposed surfaces because dust is

range finder is completely assembled and checked for its

likely

mechanical operating capability. After completion of the

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