
the
sct.eu's
and
lockrvashers
in
the
heacl
of
each
knob;
then
remove
the
seal nnts,
lockwashers,
and
bushin!-s
around
the
shafts.
(3)
Remove
the
dial
lock
a_ssembly
by
re_
moving
the
trvo
scre\^/s,
nuts,
and
lock_
r,vashers;
remove
the
key
and
chain
by
removing
the
one
screw,
nut.
ancl
lockwasher.
(4)
Remove
the
fine-tuning
knob
bl.
loosening
the
two
setscreu,s;
use
the
Bristoi
rvrench
supplied.
(5)
Remove
the
MAì{UAL
-
PRESET
TUNING
knob
by
removing
the
one
nut
anci
lockrvasher.
(6)
Remove
the
preset
base
and
gasket
b1'
removing
the
three
seal
screll's.
(7)
Loosen
the
gear
assembll'
b)'
remov-
ing
the
tu'o
seal
scretvs.
(8)
Remove
the
microsrvitch
by rotating
it
180"
clockr,r'ise,
squeezing
the
tab,
ancl
lifting
it
off.
(9)
Remove
the
dial-light
sr,r'itch
piunger
by removing
the
one nut
and
lock-
lvasher.
(10)
Remove
the
front
panel,
the
fonl
screws,
and
locklvashers;
unsolder
the
antenna
leacl
at antenna
post
A
anrì
the
black
lead
to
the R.
F.
GAIN con-
troì
;
siicle
the front
panel
forr.r,alrl
and
slicle
the
gear
assembl-r-
tou'ar.d
the
rear.
(11)
Remove
the
ciiai scale
by
removing
the
fottr
screltts.
(12)
Remove
the
lucite
light
guicle
ancl
bracket
b1-
removing
the
trvo
scre\vs
holcìirig
the
bracket
to
the
gear
assem-
bl1'
anrì
the
tu'o .qcfews
holcling
the
Ìight
guicle
to
the blacket.
(13)
Rernove
the
dial-light
bracket
by re-
moving
the trr'o
sct
ews, nnts,
and
lock-
urashers.
Nofc.
'fo
reassemble
the
gear.
assembll..,
follolv
the
procedure
in rever.se
older.
Check
lubrication
instructions
in
paragraph
86.
b.
Preset
Base.
After
removing
the
preset
base
(a(6)
above)
use
the
dial
lock
ke-v
to
re_
move
the
numbered
cap nuts
for
replacement
prìfposes.
Unscrerv
the
cap
nuts
over
the
slot
in
the
preset
base
so
that
the screw
will
fall
out
and
release
the nut.
c.
Manua,I-Preset
Knrtb
Assentbly.
After
the
preset
knob
assembly
has
been
removed
(a(b)
above),
follou'
the
procedure
below
for
repair
or
replacement
purposes
:
(1)
Remove
the
tu'o
screws,
the
two
lock_
rvashers,
and
the
spring
retainer.
(2)
Remove
the
ttvo screws,
the
tu,o
lock_
n
ashers,
and
the
detent
positioner
re_
tainer.
(3)
Remove
the
detent
positioner.
(4)
Remove
the
spring
and
cap.
(5)
Remove
the
tu'o
detent
guicles.
(6)
Remove
the
spring
bracket
b),
remov_
ing
the
two
screr,ys
and
lockwashers.
(7)
Remove
the
four
screws
and
lock_
rvashers.
(8)
Remove
the
tno
cam
brackets.
(9)
Remove
the
cam
arm
from
the
cam
lrv
removing
the
tu'o
screus
antl
lrrgll-
tvashers.
(10)
Remove
the
trvo
springs
and
cliai u.in-
dow.
d. Batrd
Srt:itch.
To
remove
the
band
srn'itch,
first
remove
the
front
panel
and
then
remove
the
six -scre\1,s
ancl
lockrvasher,s
(n (
1)
,
(Z)
,
(8),
and
(10)
above).
Unsolcler,
and
tas
ail
leacls
to the
band
-qr,r'itch.
c.
Diul
Shutter
arttl
Gear.s.
Follou,
the
pro-
ceclLrre
in n
aborze
and then
perform
the
func-
tir-rns
belou'.
(1)
Remove
the
dial shutter
by
removiug
the
hexagonal
nnt,
lockrvasher,
axle,
spring r,r'asher,
and seal
screw.
(2)
Remove
the shoulder
screrv,
O ring,
gear
(large),
spring
rvasher,
lock-
washer,
and
cap nut.
(3)
Remove
the
small
gear
by loosening
the two
setscreu,s;
use the Bristol
rvrench
supplied.
72
AGO 3134
-
TMililz$5
1
-
RTCTIVINC
2
-
CONTENTS
4
-
ON CONTACT
5
-
NTRODUCTION
9
-
7. Toble
11
-
AND FILLERS
12
-
INSTRUCTION
12
-
Running
14
-
10. Additionol
15
-
Equipment
15
-
Required
15
-
CHAPTER
16
-
OPERATING
16
-
INSTRUCTIONS
16
-
H!..1,",?:r
17
-
)l;.11ru,,#
17
-
Connections
19
-
Initiol
19
-
Adjustment
19
-
",i'
21
-
AGO 313A
22
-
Function
23
-
P0sition
25
-
'.,(.);134
25
-
Section
26
-
IJNDER UNUSUAL
26
-
CONDITIONS
26
-
Figure 14
28
-
Radio Receiuing Set
28
-
IGRR-S
28
-
MAI NTENANCE
30
-
SERVICES
30
-
Lubricqtion
31
-
LU BRICATION
31
-
WEATHERPROOFING
32
-
Performonce
34
-
Checklist
34
-
F/LAn'tEn/r
37
-
'lla'
39
-
,'zÉ
43
-
3LO"),\
45
-
'41
46
-
AGO 3134
48
-
AGO 313^{
50
-
,,*-lt'
51
-
--l-.01
52
-
.iT'f
53
-
"'I
53
-
L:_______"1
57
-
'_f_
58
-
Ht'
60
-
MAINTENANCE
63
-
'
65
-
R-r74/URR
66
-
:lror,ii
68
-
Symptom Probable
69
-
Correction
69
-
Generol
70
-
Signol Substitution
70
-
80. A-f
72
-
Substitution
72
-
.È*s'
73
-
Band Frstuency
75
-
Conlponents
76
-
Components
76
-
TnC lìl(llCatC(l
77
-
I{4IUAL-PREIPT
78
-
AGO 3134'
79
-
Section lll
81
-
ALINEMENT
81
-
PROCEDURES
81
-
?3'
82
-
APPENDIX
89
-
REFERENCES
89
-
9. Abbreviotions
91
-
6F300-1031
93
-
22553-206
93
-
3E5999-6.35
93
-
Cold sleeve
95
-
H1Ojl, Il1l9
96
-
I suppìr'hatteì'y
97
-
AGO 31SA
97
-
capacitol flom
99
-
Function of
100
-
Sienal Corps
101
-
Signal Corps
101
-
AGO 3134
102
-
\'7
105
-
313A'
107
-
R-174lURR-Conrinued
110
-
AND LETTER CODE
111
-
TT T ZN T
112
-
; l:ÉÉ=fr
116
-
F- ìgu,re
120
-
Ra<lio Reet:;
120
-
'ó*;l'/;:l
121
-
T----T---;---t
123
-
:o'];
124
-
/''o
125
-
''F
126
-
."i
127
-
IT'îI
129
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