Operating instructions
DA AGO
Form
11 238
item
No.
,
10
11
12
13
1A
16
DA AGO
Form
1 1-239
item No.
DA
AGO
Form
1
1-238
item
No.
Preventive
maintenance
opetations
6
DAILY-continued
Tn<noni tha caofìno ^+ Ìó-,{
I
Inspeet
the
seating
of readily
acces-
I
sible
pfuck-out
items:
tubes.
crys-
tals,
lamps,
fuses,
and
vibrators.
Inspect
controls for
binding,
scraping,
excessive
looseness,
lvorn
or chipped
gears,
misalinement, positive
action.
Check
for normal
operation
(par.
43).
.WEEKLY
Cautíon:
Disconnect
all
power
be-
fore
performing
the following
opera-
tions.
Upon
completion,
reconnect
power
and check
for
satisfactory
oper-
ation.
Clean
and
tighten
exterior
of
compo-
nents
and
case, mounting,
antenna
posts,
and
connectors.
fnspect
case, front
panels,
mounting,
antenna
terminals,
and exposed
met-
al
surfaces
for
rust,
corrosion,
and
moisture.
Inspect
cords,
cables,
wires,
and
shock
mount
for
cuts,
breaks,
fraying,
de-
terioration,
kinks,
and strain.
Inspect
mast
sections
and
antenna
for
eccentricities,
corrosion,
loose
fit,
and
damaged
insulators
and
reflec-
tors.
Inspect
all canvas
items
ancl
technical
manuals
for
tears,
mildelr,,
or
fray-
inE.
Inspect
for looseness
of
accessible
items;
switches,
knobs,
jacks,
con-
nectors,
electrical
transformers,
re-
lay,
capacitors,
and
pilot
light
as-
sembly.
Inspect
storage
batteries
for
dirt,
loose
terminals,
electrolyte
level
and
spe.
cific
gravity,
and damaged
cases.
Clean dial
window.
Inspect
shelters
and
covers
for
ade-
quacy
of
weatherproofing,
10
11
72
1ù
1t
lr)
MONTHLY
Inspect
electron
tubes for
loose
enve-
lopes,
cracked
sockets,
and
insuffi-
cient
socket
spring
tension;
clean
dust
and
dirt
carefully;
check
emis-
sion
of tubes.
Section
| | l.
36.
Lubricqtion
lnstructions
Cautíon:
Do not
allorv
lubricating
oil
to con-
'rrct
material
such
as rubber,
paint,
and
certain
'
r.ìo
3t3A
19
DA
ACO
Form
11 239
item No-
2l
22
23
oÀ
25
26
27
29
QI
eq
ùó
óD
óo
QN
38
Prer cnti!e
maintenance
operationS
MONTHLY-contìnued
Insert
fixed
capecitor.s
for
leaks,
bulges,
anrl
rliscolor.ation.
Inspect
rela;z
for loose
mountings,
burned,
pitted,
or
corroded
contacts;
misalinement
of
contacts
and
spring;
insufiìcient
spring
tension;
binding
of
plungers
and hinge parts.
Inspect
variable
capacitors
for
dirt,
moisture,
and
loose
mountings.
Inspect
resistors,
bushings,
and
insu-
lators
for
cracks,
chippings,
blister-
ing,
discoloration
and moisture.
Inspect
terminals
of large
fixed
capac-
itors
and
resistors
for
corrosion,
dirt, and
loose
contacts.
Clean and
tighten
switches,
terminal
blocks,
relay
case,
and
interior
of
chassis
not
readily
accessible.
Inspect
terminal
blocks
for
loose
con-
nections,
cracks,
and
breaks.
Lubricate
equipment
in
accordance
with
applicable
Department
of
the
Army
lubrication
order.
Clean and
tighten
connections
and
mountings
for
transformers,
chokes,
potentiometers,
and rheostats.
Inspect
transformers,
chokes,
ancl
po-
tentiometers
for
overheating
and
oil
leakage.
Before
shipping
or
storing,
remove
batteries.
Inspect
batteries
for
shorts
and
dead
cel1s.
Inspect
for
leaky
waterproof
gaskets
and worn
or
loose
parts.
Check
adequacy
of moistureproof
and
fungiproof
treatment.
If
deficiencies
noted
are not
corrected
during
inspection,
indicate
what
ac-
tion
was taken
for
correction.
LU BRICATION
plastics
on which
the lubricant
ma1-
have
a
solvent
effect.
a,. Approximately
once a month
clean
exDosed
23