setting. This condition can be cor-
case of some individuals, a mild irrita-
r e c t e d by cleaning and recoating
tion or inflammation.
w i t h antistatic and cleaning com-
(3) A v o i d g e t t i n g p e t r o l e u m p r o d u c t s ,
pound as prescribed in (c) b e l o w .
such as mineral spirits paint thinner,
(c) Cleaning and recoating.
dry-cleaning solvent, engine fuels, or
1. W a s h t h e l e n s o f t h e m e t e r ( s )
u s i n g a damp chamois or a non-
d e t e r i o r a t e the rubber.
abrasive tissue or soft cloth and a
(4) The use of diesel fuel oil, gasoline, or
mild detergent and water solution,
benzene (benzol) for cleaning is pro-
do not rinse.
2. Wipe or blot the lens dry. Avoid
u s e of a dry cloth since it may
c. Rust Removal. Remove rust or corrosion
s c r a t c h or mar the surface and
from all parts of the materiel. To remove rust
possibly produce a static charge.
or corrosion from unfinished surfaces, use steel
cleaning brushes or abrasive cloth. On finished
Caution: Never use solvents,
s u r f a c e s , other than highly polished surfaces,
o r cleaning solutions containing
remove rust or corrosion by buffing with a ro-
a c e t o n e , benzene, carbon tetra-
tary wheel wire brush constructed of steel wire
chloride, etc. These solvents may
between 0.010 and 0.025 inch in diameter.
attach and ruin the meter cover
Crocus cloth may be used manually to remove
or lens surface.
rust or corrosion from polished surfaces.
3. Coat the lens with antistatic and
cleaning compound 6850-368-5227
147. Preventive Maintenance
and allow to dry thoroughly.
4. After the coating is completely dry,
a. Purpose. To assure maximum operational
inspect the action of the meters, as
readiness, it is necessary that equipment be sys-
set forth in (b) a b o v e .
t e m a t i c a l l y inspected at intervals every day it
(4) R u b b e r parts other than electrical.
is operated, so defects may be discovered and
Clean rubber parts with soap and
corrected before they result in serious damage
warm water. Apply a coating of pow-
or failure. Certain scheduled maintenance serv-
dered technical talcum (ZZ-T-416) to
ices will be performed at these designated in-
p r e s e r v e the rubber.
tervals. Any deficiencies discovered that cannot
General Precautions in Cleaning.
b e corrected by the operator and/or crew, or
corrected by replacing parts will be reported on
(1) Provide adequate ventilation both dur-
DA Form 2404.
i n g and after use of trichloroethane.
Avoid prolonged inhalation of vapor.
b. Daily Preventive-Maintenance Service.
R u b b e r gloves should be worn since
Each equipment will be inspected each day that
this cleaner has a drying effect on the
it is operated. This service is divided into three
parts, as indicated in (1) through (3) below.
(2) S e l f - e m u l s i f y i n g d e g r e a s i n g s o l v e n t
(1) B e f o r e - o p e r a t i o n s e r v i c e . This is a
compound, mineral spirits paint thin-
brief service to ascertain that the
ner, and dry-cleaning solvent are flam-
equipment is ready for operation, it is
mable and should not be used near an
m a i n l y to check to see if conditions
o p e n flame. Fire extinguisher should
a f f e c t i n g the equipment's readiness
be provided when these materials are
h a v e changed since the last after-
used. U s e only in well-ventilated
These cleaners evaporate
(2) During-operation service. This service
quickly and have a drying effect on the
c o n s i s t s of detecting unsatisfactory
skin. If used without gloves, they may
c a u s e cracks in the skin and, in the