TECHNICAL INFORMATION ON THE 100-MM TANK GUN AND OTHER ARMAMENT ON THE T-54 TANK

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80T00246A028600430001-7
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 77
• Document Creation Date: December 27, 2016
• Document Release Date: February 27, 2013
• Sequence Number: 1
• Publication Date: October 4, 1960
• Content Type: REPORT

Declassified in Part - Sanitized Copy Approved for Release 2013/02/27:
CIA-RDP80T00246A028600430001-7
Declassified in Part - Sanitized Copy Approved for Release 2013/02/27:
CIA-RDP80T00246A028600430001-7
Declassified in Part - Sanitized Cop; Approved for Release 2013/02/27: CIA-RDP80T00246A028600430001-7
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?
INFORMATION REPORT INFORMATION REPORT
CENTRAL INTELLIGENCE AGENCY
This material contains information affecting the National Defense of the United States within the meaning of the Espionage Laws, Title
18, U.S.C. Secs. 793 and 794, the transmission or revelation of which in any manner to an unauthorized person is prohibited by law.
S-E-C-R-E-T
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lEtOUNTRY USSR
SLAW Technical Information on the 100-mm
Tank.LGun and Other Armament on the
T-54 Tank
DATE OF
INFO.
PLACE &
DATE ACQ.
REPORT
DATE DISTR. 4# 0 c/o 06 r /760
NO. PAGES
KIFFFDPKWM
Rn
1
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SOURCE EVALUATIONS ARE ,DEFINITIVE. APPRAISAL OF CONTENT IS TENTATIVE.
English-language documents translated
from the Russian
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ATT. NO, 1.
A document entitled "Incomplete Handbook of Russian 100-mm Tank
Gun -- Document T?Xg," -No other publishing data are given.
The document provides instructions for the maintenance
and operation of the 100,mmtank gun, presenting information
on such topics as range tables, sighting the gun, ricochet
fire, types of shells and fuses, and includes fire charts
for the 7.62-mm tank machine gun., The document contains a
partial table of its contents; it lacks an undetermined number
of pages; page numbers, indicated by numbers enclosed by
parentheses, stop at page 92.
ATT. NO,, 2.
A document entitled "Book of Diagrams and Figures." No other
publishing data are given. This booklet consists entirely of
sketches with legends illustrating the nature of the various ?
parts and mechanisms of the 100-mm tank gun? It contains a total
of 24 figures and is 26 page's in length.
Distribution of Attachments:
ArMv. Retention (1 CODY' each attachment)
S-E-C-R-E-T
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'M)f
STATO X/ AR 0-Xi (NAVY) X
/AIR X (NSA
X FBI
`NIC)
X
L
)
?-rbe
(Wale: Washington distribution indicated by "X"; Field distil ution by "#".)
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INFORMATION REPORT INFORMATION REPORT
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.0"
BOOK OF DIAG3AM3 AND FIGURES
lr"..e.,?????
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L.
Pig. 1.
General view (from right) of 100 mot tank gun.
2 - Recuperator (36-07); 4. - Recoil buffer (S6-08);
6 - Barrel (36-01); 7 - Guard (86-10);
14, r, areeuh block.,
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EXTERNAL SIDE
SECRET
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1(A)
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1- barrel (86 01); 2- regupqsator (36 07)? 3- teleac_Alc.
7- guard (86 10); 8- mechhnista for bracing thti gun in tilt: field
9_ opening
-I-
SECRET
50X1-HUM
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6
- -
k. ? I
_\ ?
Fig. 2. General view (from left) of 100mm tank gun
sight; 14'- recoil brake ( 6 08); 5-
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compensating mechanism (s6 113)
6- closing 'mechanism (Sip 02-4)
meohanism,semi-automatic (S6 30);10- elevating Tile 'Thant stn (36 09)
11- cradle (S6 09); 12- trun ntonstFf6Cririell 3- mantlet
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-116144' A441. ? et ?
_
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r)71, ?
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Through AS
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View through pointer
`11C
?00.1.
Through CC
e a
Fig. 10 Tube
el- cylindrical, guiding portion;e- cylindrical section;a- collar of
tube;?- key seating;a- stop lug for the flange of the shell case;
e - horizontal slotA.- recess for the axis of the extractor;
1- cylindrical sockert;X- cylindrical collar;A,Arn- conical
sectionsp- basic cone71- steep cone;/3- small cone;c stop cone;
T - rifled slope;y- rifled 3ection4- landepc- field(?)of the
lander4- driving edge;t - nondriving edge.
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Profile of' landes
Number of lades-1.O
Rifling of uniform twist
(right)
Angie of of inclinati?4 of
5?58'42" cp
Twist of rifling-
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71g. 5. Sleeve pipe
3 - sleeve pipe;o-- cylindrical part;6- stop tread
- natch;r- grooves
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14.c..4t
410L.I. ix
NT
44-7. iwP
Anag?..-,-?:-;,.........m,,,krzi., ,,,,
? ?
WI
--?
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Fig. 6 . Breech (view from rear).
6- sliding wedge re cess;a - recess for the pin of the op.Trziting
lever of the breech b lock AL- aperture for the axis of the
orank;u- aperture for the stop of the catch of the wedge;
- shaped recess for the castor of the VS-11 appliance;
- :-1:ou 13er for the opening mechanism;.4- recess ;X - crosspiece;
- buffer piston aperture ;rt - control plat f orm;p - recess for the
stop of ? the breech block o-perating lever;C- Shoulder for the
breech block operating lever;T- operating handle recess;
counterrecoil buffer rod aperture;a:- recess for the nut of
the counterrecoil buffer rod;24- aperture for the pins; -
- threaded recess for the ring bolt ;14- threaded aperture.
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CD
Breech (view from front and above)
- thiiaded recess for junction with the sleeve pipe;
e - guiding surfaces;t - supporting wall;e- crank recess
- wedge stop aptrburc;A- recess for the catch Ofthe
axis of the extructoi.;.5.-- recess for the catch of the
body of the opening 1W chanisyn/3- aperture for the
screws of the fastening of the uuffers;r- guiding rod
recess - recess for the catch of the sleeve pipe.
r
Breech (view from above
Fig. 8. Breech (view from front and elow
3- extractor axis uperture;27 guidie rod
recess;e- recess for the catch of tice)
sleeve pipe;e- plunger aperture;*-- cous-
shaped recese;2- threaded aperture tor the
bolts of the fastening of the semi-
fule;11 - recess ror the tL.s tuning
of thL ;-ierni-autotaa tic rule - re cew tor
the opening mechanism spring;i1--
recess under the o,)ening ;,tecilanism lever;
- inilioutor pointer;"- button recuse.
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.Fig. 9.
,Breech ring bracket pin.
21 - Pin (01-24.); 22 - Stop (.01-26);
23 - Spring (01-25); 24. - Sctrew (01-27);
.25 - Draw ring (01-28) ; a - Stop inset;
- Stop collar.
SECRET
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Fir. 10.
--
Parts'of the operating
mechanism.
.1 - Bre,!chblock wedge (02-1); 2 - Breechblock
handle (a 02-2); 3 - Crank with bearing (Sb 02-3);
5 - t'd-an.: axle (02-19); 6 - Semi-automatic cam ?
(30L.); a - Crank tooth; r-- Shaped slot in the wedge
for the bearing.
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Or.
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Fig. 12. Breechblock wedge (view from front, above).
1 - Breechblock wedge (02-1); 11 - Extractor cams (02-9);
12 - Screws (02-10); r - Shaped slot for the bearing of
the crank;A - Inset for the sear axis; e - Aperture for
the knob of the sear stop; ?ft- Inset for the firing pin sear;
- Inset for the sear stop; 41 - Aperture for the shaft;
14- Notch for the wedge catch; 0 - Wedge face.
n
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? -
?v
Fig. 13. Breechblock handle.
4- handle (02-25); 7- shaft (02-27); 8- rod (02-28); 9- shaft spring
(02-23); 10- shaft axis (02-26); 31- piston (02-18); 32- catch of the
handle (02-21); 33- spring (A51230-10); 49- pin (A51041-13); 73-
'catch axis (02-90); a- inset for the piston and the spring.
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Fig. 14.
Parts of the firing mechanism.
13 - Firin pin cap (A52150-9); 14-Firing spring p2-7);
15 - Firing pin (A51605-3); 16 - Firin pin sear 02-4);
17 - Sear axis (02-5); 18 - Sear stop (02-3);
19 - Knob sprin?7_ (A512301-13); Knob (02-78); ,
a - Notch for sear stop; 6' - Notch for the end of the
firing pin sear.
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View along pointer A
Position before cocking. Position after cocking
12
OP API
11 !RTC
14 2! 111???4P411
17
18
144
le
Fig. 15. Breechblock wetly: with firing mechanism.
1 - Breechblock wedge (02-1); 11 - Extractor cam (02-9);
.12 - Screw (02-10); 13 - Firing pin cap (A52150-9);
:14 - Firing spring (02-7); 15-Firing pin (A51605-3);
16 - Firing pin sear (02-4); 17 - Sear axis (02-5);
18 - Sear stop (02-3); 19 - Knob spring (A51230-13);
20 - Knob (02-78); y - Sloping recess.
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Fig. 16.
Disposition of the parts of the firing mechanism'
in the breechblock wedge:
a-- Firing mechanism in the cocked position;
Firing mechanism in gt&n,position.
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,
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23
Fig. 17.
.Parts of the extractor mechanism:
21 - Upper extractor (02-87); - 22- Lower extractor
(02-88); 23 - Extractors' axis (02-16);
e - Extractor hooks; V( - Lugs; U - Grips;
- Branches.
SECRET
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Fig. 19.
Parts of the closing mechanism.
24 - Closing mechanism lever r2-32); 25 - Axis (A51610-24);
26 - Link (02-37); 27 - Pin A51042-51); 28 - Rod (02-334);
29 - Spring (02-35); 30 - Socket (02-33);
31 - Rod sleeve (02-36); 32 - Guiding nut (02-89);
Shoulder;At- Key bed;- Tongue of the socket of the
closing mechanism.
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54
64 di Ili
?11;;
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Fig. 21.
Farts of th,2 opning mechanism.
- Semi-automatic cam (30-61); 51 - Collar (30-62);
52 - Stoppin screw (30-5q); 53 - Ring (30-60);
54 - Stay (30-52); 55 - Pin (A51041-35); 56 - Ram (30-58):
57 - Rule (30-56); 58 - Washer (A51020-27); 50X1 -HUM
59 - Stop with roller (Sb 30-11); 60 - Split pin
(A51040-28); 61 - Fin (30-6); l2 - Spring (30-5);
63 - Socket (30-6); 64 - Pin (A51046); 65 - Bolt
(A51002-50); 66-Spring (30-55); 67 - Bushing (30-57);
d - Bevel for the roller of the semi-automatic stop;
K - Ruler tongue;
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Fig.22. Breechblock in
,.ctional view and the
--,osition of its parts in the
- Breechblock lever (S6-02-2)
- Crank with castor (S6-02-5) -
Crank axis (02-19)
7 - Axis of sear of firing pin
18 - Firing pin sear stop_
,2-.5): 19 - Button spring
51230-13): 20 Button (02
'..Ipper extractor (02-37)
- Lower extractor (02-38)
- Axis of extractors (32-16)
- Closing mechanism lever
-32): 25 - Tightening bush
'2-20): 26- Dowel (A51050-34)
- rush rod (02-13)
- "-ash rod spring (A51230-12)
- :telease lever (02-60)
'r) - Pin (A51041-157)
_ - Pin (A51041-105)
- Stop tip (02-12): 36 - Screw
.1365-40): 37 - Stopping bush
.;" -17): 38 - Stop spring
:30-15;: 39 Wedge stop(02 -11)
K;ket (02-76): 41 - Spring
?: 42 - Axis stop of
tractors (02-24): 43 - Socket .
3top of closing mechanism(02 -22)
- Screw (A51062-93): 74 - Pin
-..=1341 -35): 75 - Lever arrester
T-91): 76 - Screw (A51064-23)
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Declassified in Part - San itiz
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81
83
85
88
nprlassified in Part - Sanitized Copy Approved for Release 2013/02/27: CIA-RDP80T00246A028600430001-7
50X1-HUM
!V) Declassified in Part - Sanitized Copy Approved
for Release 2013/02/27: CIA-RDP80T00246A028600430001-7
-----t
Scale,
Frag-H.E.
Frag-H.E.(0F)
FULL
FULL
TEH2-22 sight
Full charge.
"mils"
50X1-HUM
elevation graduations
-
RANGE
Height of
trajectory
r
Alteration of range
by alteiaton of
angle of elevation
by 1 mil
Angle of
elevation
Terminal
velocity
_
Time of
flight
Sight
Corrections
Probable errors
according
to scale
to direction
to range
for crosswind
of speed
10 m. per. sec
0
for differences of
v
.
VI
C4-4 ,i-J
air
temperature
by 10?
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by 1%7
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shell by I
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66
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44
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86
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6
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109
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9
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133
186
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31
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22
307
25
28
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800
---
50X1-HUM
t-TT
Declassified in Part - Sanitized Copy Approved for Release 2013/02/27: CIA-RDP80T00246A028600430001-7
24)
Scale
Frag-II.E.
FULL
TSh2-22 sight
"mils -
elevation graduations
Declassified in Part - Sanitized Copy Approved for Release 2013/02/27: CIA-RDP80T00246A028600430001-7
50X1 -HUM
w
o
'.4
-.4
al
Sight
According
to scale
Corrections
Alteration of range by
alteration of angle of
elevation by 1 mil.
4-,
0
0 -!-4
4
,r)
! Angle of
elevation
1
Angle of
impact
Terminal
velocity
Time of
flight
Probable errors
RANGE
to direction
i
to range
- -
w
Ch
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cd
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X
0
C.4
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n
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for crosswind
of speed
10 m. per. sec.
headwind of
speed
10.m. per sec.
for differences of
VI
01
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ri
st;
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temperature
by 1C
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shell by
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m
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mil
If
mil
mil
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M
M
M
M
M
M
mil
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m/sec
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M
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12000
200
400
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800
184.
180
197
207
211
860
911
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1020
1080
5
5
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10
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173
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187
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88
90
91
95
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199
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136
137
138
139
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192
193
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30
30
29
29
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23
24.
25
25
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303
302
301
300
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27
27
28
29
29
29
30
30
30
12
13
14
15
15
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4.0
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4.2
4.3
12000
200
400
600
800
13000
200
400
600
800
218
225
233
24.0
248
1140
1200
1260
1330
1400
5
5
6
6
6
11
11
11
11
12
208
216
223
231
238
97
98
100
102
104
208
213
218
223
228
141
142
14.3
14-5
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197
199
201
203
204
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-22
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-23
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27
27
26
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5
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27
28
29
29
30
299
299
299
299
298
30
30
31
32
33
31
31
31
32
32
16
17
17
18
19
4.4
4.5
4.6
4.8
4.9
13000
200
400
600
800
14-000
200
400
600
800
256
264
273
281
290
1470
1540
1620
1700
1780
6
6
7
7
7
12
12
12
12
12
24.6
254
262
270
278
106
107
109
111
112
233
238
242
247
252
147
148
149
150
151
206
207
208
210
212
-25
-25
-26
-27
-27
25
24
23
22
22
5
6
6
L
6
15 23
15 52
16 22
16 53
17 25
31
32
33
34
34-
298
299
299
299
299
34-
34
35
36
37
33
33
33
34
34
20
21
22
23
24
4.9
5.0
5.1
5.3
5.5
14.000
200
400
600
800
15000
200
400
600
800
,
299
308
317
327
337
1870
1960
2050
2150
2250
7
8
8
8
9
13
13
13
13
13
287
295
303
312
320
114?
116
118
120
122
256
261
265
270
275
152
154
155
156
158
214
216
217
218
220
-28
-28
-29
-30
-30
22
22
21
21
20
6
7
7
8
8
17 57
18 30
19 03
19 37
20 12
35
36
37
38
39
299
300
300
301
301
37
38
39
40
41
35
35
35
36
36
25
26
27
28
29
5.9
5.9
5.9
6.0
6.1
15000
200
400
600
800
16000
200
400
600
800
34-7
357
367
378
389
2350
24.50
2560
2670
2790
9
9
9
10
/0
14
14-
14
14
14
329
338
34-7
356
365
123
125
127
129
131
279
284
288
293
297
159
161
162
163
165
222
224
226
228
230
-31
-31
-32
-33
-34
19
19
19
18
18
8
8
8
9
9
20 48
21 25
22 02
2? 40
23 19
39
4_0
41
42
43
302
302
303
303
304
42
43
44
4.5
46
37
37
37
38
38
30
31
33
34
36
6,2
6.4
6.6
6.7
6.9
16000
200
400
600
800
50X1-HUM
inp
Declassified in Part - Sanitized Copy Approved for Release 2013/02/27: CIA-RDP80T00246A028600430001-7
(25)
Declassified in Part - Sanitized Co
w-eNta IT
py Approved for Release 2013/02/27: CIA-RDP80T00246A028600430001-7
FRAGM EN TAT ION
OP .412
(ONE-PIECE)
-H . E. SHELL
TABLE OF CORRECTIONS OF THE ANGLE OF ELEVATION FULL
BY THE ANGLE OF SIGHT FULL CMARGE
50X1-HUM
A. CORRECTIONS WHEN THE TARGET IS HIGHER THAN TANK
CORRECTIONS MiEll THE TARGET IS LOWER THAN THE TANK
100
140
180
220
260
300
320
340
360
380
Angles of
elevation
Angles
of sight
100
140
180
220
260
300
320
340
360
380
10 .
0
0
0
0
0
1
10
10
0
0
0
0
0
0
0
0
10
20
0
0
0
0
0
1
1
1
20
20
0
0
0
0
+ 1
0
0
0
0
20
30
0
0
0
0
1
1
1
2
30
30
1
0
0
0
1
+ 1
0
0
0
30
40
1
1
1
1
1
1
1
3
40
40
1
1
0
0
1
+ 2
0
0
0
40
50
1
1
1
1
1
1
1
3
4
50
50
1
1
0
0
1
+ 2
1
0
0
50
60
1
1
1
1
1
1
2
4
5
60
60
i
1
1
+ i
+ 2
+ 2
1
+ 1
0
0
60
70
1
1
+ 1
3
2
1
+ 1
1
70
Notes: 1.
Corrections of the angle of elevation are positive.
Notes:
1. Corrections of the angle of elevation are negative without a sign and
positive with a sign (+).
2.-
Angles of sight, angles of elevation, and corrections are in mils.
2.
Angles of sight, angles of elevation, and corrections are in mils.
120
1
1
1
2
3
5
6
7
9
10
120
120
2
3
4
2
+3
+4.
+3
+3
+2
+1
120
130
1
1
1
2
3
5
7
8
10
12
130
130
3
3
4-
3
+2
+4.
+4.
+4
+4.
+2
130
otonT
Declassified in Part - Sanitized Copy Approved for Release 2013/02/27: CIA-RDP80T00246A028600430001-7
50X1-HUM
(24) I
Declassified in Part - Sanitized Copy Approved for Release 2013/02/27:
CIA-RDP80T00246A028600430001-7
U. AUXILIARY TABLES
50X1 -HUM
50X1 -HUM
SECRET
Declassified in Part - Sanitized Copy Approved for Release 2013/02/27:
CIA-RDP80T00246A028600430001-7
Declassified in Part - Sanitized Copy Approved for Release 2013/02/27:
CIA-RDP80T00246A028600430001-7
u. TABLES.
50X1 -HUM
1. TABLES OF TANGENTS OF ANGLES.
2. TABLES Oi CONVERSION OF GRAJUATIONS OF THE
PROTRACTOR INTO DEGREES AND MINUTES.
3. TABLE OF SINES OF ANGLES.
4, TABLE FOR THE RESOLUTION OF BALLISTIC WIND
INTO CONSTITUENTS.
50X1 -HUM
z3EL.1'
Declassified in Part - Sanitized Copy Approved for Release 2013/02/27:
CIA-RDP80T00246A028600430001-7
Declassified in Part - Sanitized Copy Approved for Release 2013/02/27 : CIA-RDP80T00246A028600430001-7
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\O-*PeN.-ONCON?Dtr\P-N
NONa-1414%.0MON4?0
Vv .4.- 04 01, 0..1 Cu c4 Pr'%2rN et1 W.%
alkat alkalialkaa
00000000000
50X1 -HUM
fib
A
11=11.01
04-N1,1141A?ONCOOv0
C-
N
-?
CO
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II
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a
Li
ON
cd
VI?U
0"?.
A
444444
uNe-r--muN
y-m-NNK)
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re-NNM
NNNNNN
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000000
IA
141 CT V! oe- r? W*1
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re-NM
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8
v'tSIA
8
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000000
0\ON0314-401
rrNM
88 8 8
14 AAA
in Degrees and Minutes
E5W
E-4Z
00
CO
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0000000000
uppv-Nr.rN4L-coaN
88888A8888
8
,W8i8T,W812'uS
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(1)
LrN.r.N.M0111-MaN
NOMY--fNOMe-.4.
0,,NNteN441J-Ner?
NC040\4NC040V*
NLr?My-4-NLCNMT--7
.00e-NNMM4LrNir)
trt
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001-NNw\teN4-ifluN
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00,--NNPrNPeN4tx\LA
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,4NLAteNv-4NuNteN
00,-,-NteNK-N4-4vN
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f,..ma)(Arr
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00,rNoni.e)441")
5
40M)Nc040\aNW
0N04Y-LINN
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50X1 -HUM
0?DN0D-4-0?0Nc04
0Me--4-N0Mr4N
00-Nmre)44tA
82
00
r4N
44 A
2000000000
8 A 8 A A 8 8
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30
is4;.:34.4
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1
TABLE OF SIDES OF ANGLES 50X1
-HUM
(Angles in protractor divisions by 0-10)
ProtractorProtractor
divisions
0
1-00
2-00
3-00
4-00
5-00
6-00
7-00
8-00
9-00
10-00
11-00
12-00
13-00
14-00
divisions
0-00
0
0,105
0,208
0,309
0,407
0,500
0,588
0,669
0,743
0,809
0,866
0,914
0,951
0,978
0,994
00-00
0-10
0,010
0,115
0,218
0,319
0,416
0,509
0,596
0,677
0,750
0,815
0,871
0,918
0,954
0,980
0,995
0,10
0-20
0,021
0,125
0,228
0,329
0,426
0,518
0,605
0,685
0,757
0,821
0,676
0,922
0,957
0,982
0,996
0-20
0-30
0,031
0,136
0,239
0,339
0,435
0,527
0,613
0,692
0,764
0,827
0,881
0,926
0,960
0,984
0,997
0-30
0-40
0,042
0,146
0,249
0,34)
0,445
0,536
0,621
0,700
0,771
0,833
0,886
0,930
0,963
0,986
0.998
0-40
0-50
0,052
0,156
0,259
0,38
0,454
0,545
0,629
0,707
0,777
0,839
0,891
0,934
0,966
0.988
0,999
0-50
0-60
0,063
0,167
0,269
0,368
0,463
0,553
0,637
0,714
0,734
0.844
0,896
0,937
0,969
0.989
0.999
0-60
0-70
0,073
0,177
0,279
0,378
0,473
0,562
0,645
0,722
0,790
0.850
0,900
0,941
0,971
0,991
1,000
0-70
0-80
0,084
0,187
0,289
0.388
0,482
0,571
0,653
0,729
0,797
8,855
0,905
0,944
0.974
0 992
1,000
0-80
0-90
0,094
0,198
0,299
0,397
0,491
0,579
0,661
0,736
0,803
0,961
0,909
0,948
0,976
0.993
1,000
0-90
,.,-
vtrot
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50X1-HUM
( 31)
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Table for the anal sis of ballistic
Wind direction
directional angle of target minus
directionalAIngle of wind
wind changes range direction.
Correction marks
30 30 60
1 29 31
59
2 28 52 58
3 27 33 57
4 26 34 56
Numerator - longitudinal
Denominator - latitudinal
5 25 35 55
6 24 36 54
7 23 37
53
0
0
1
1 1
L12, Lt,2
1 1
2.12,
1
2
2
2
2
0 0
ons
50X1 -HUM
Wind speed in metres per sec.
10 1 11 1-T2
7 8
-6
.7-91
1 2 9
4L2 A'1, 212
2 2 2
2 2 3
3
3 3 4
13 I 14 15
Constituent in metres per sec
Constituent in metres per seo
10 11
10
0
11
12
0
12
1
0
14.
1
8 9 10 11 11.5 12.5 1.111
2 2 2 2 3 3
?42 ZL2 LI 10.5 11.5 12.5 13.5
2 2 3 3 3 4 4 4
3 3
2
4.
..?t1
2 6 6.
5 5
8
4 4.4.
5
12
.g.a.2 10_,5 118.1 12
4 5 6 5 7
7
9
10.!.5 412
8
7
9 242 10.5
8 9 9
1
0
2
141.2
3
1 4.
5
1
8
12
10
16 17
16
16
3
12
5
14.
7
19 20
17 18
0
12 20
0
17 18
16.5,
4
19 20
2
19.2
4-
16ii
6G
18 19
?6
15.5 ILI
7 7
11.4,5 19.5
8 9
12
11
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14. 14.5
TO 11
10.11....lirmakroyaapairraeor?
12.4
9 10
12 16T.
12.5 13.5
fi 12
14
13
????????141010
50X1 -HUM
713
(32)
Wind direction
Directional angle of target
minus directional angle of wind
Wind alters range/direction
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WIND- 3PEED IN METRES PER 3EA,
50X1-HUM
50X1-HUM
Numerator - Longitudinal constituent in metres per sec
Donominator - Latitudinal constituent in metres per sec
-12 .1.2.2.5_
13 12+
10,5
15 15
9 9
242 7,5
16 17
5.2.2 6
17 18
315 4
18 19
2 2
1-g 19
0 0 ?
18 19
2 2
'II -17 13 14. 15
15
1,5 11,2
12 13
0 0 0
11 12 13
Pius (+) means that in calculating the corrections to the wind the range (angle measurement) increases in consequence
Minus (-) means that the range (angle measurement) decreases in consequence
ECREZI
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50X1-HUM
Prr,
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(34)
( 35)
A. DETERMINATION OF FIRING CONDITICVS
50X1 -HUM
1, Determination of the change in muzzle velocity caused by wear of the bore
of the barrel.
2. Determination of meteorological conditions.
3. Determination of the correction for the charge.
1. DETERMINATION OF THE CHANGE IN MU7.7.IX VELOCITY CADZED BY WEAR OF THE BORE
OF THE BARREL
The determination of the change in muzzle velocity caused by wear of the
bore of the barrel is derived according to the dependence of the change an the
lengthening of the charge chamber Ahewn below (dependence on ).
For determination of the lengthening of the oharge chamber with a given
state of the bore of the barrel measure the length of the chamber, and from the
size obtained read the length of the charge chamber for a new barrel (snewn in
the manual of the barrel).
Measuring the length of the charge chamber is done with the FZK instrument
with a measuring ring of 103.19mm diameter, with the employment for measuring of
a guiding disc of 139.8mm diameter.
If there is nothing shewn in the manual of the barrel concerning the length
of the charge chamber for a new barrel measured with the FZK instrument then this
initial length is accepted as equal to 721mm.
Dependence on
2
-.0.5
6
-1
13
-1.5
25
?2
56
-2.5
176
-3
290
23.5+
4r8
???
492] 570
-4.5 -5
For full charge
Lengthening of charge
chamber mm
Change in muzzle velocity%
2. DETERYINATION OF METEOROLOGICAL CONDITICNS
Meteorological conditions are determined from the ARS bulletin "Leteo-ognevoi"
"Meteor-fire") broadcast in the form of the following telephone message
example):
"Meteo-ognevoi" 170805-0084-51567-02-695204,04-685304.408-675507-12-695910
(36) The meanings of the figures are determined by their place in each group and
the position of the group in the telephone message:-
1st group (6 figs) - day of the month (17? = 17th;
170805 hour of observation (08) 8 8 a.m.
minutes of observation 05) = 5 minutes
2nd group (4. figs) - height of AMS above sea level
0084 (0084) = 84m
+ Original reads "23.5", although probably "-3.5" is correct
50X1-HUM
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Sc
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SECRET
3rd group (5 figs) = ground variation of atmospheric pressure
51567 (515) = -15mm;
'Witik0f41. 7,7'1_ 4 -7n
50X1-HUM
50X1 -HUM
50X1-HUM
4th group ,t Iigs) =
5th group (6 figs)
height or trajectory in 100s of metres
(02) = 200m
= ballistic variation of air temperature
for this trajectory (69) = -19?;
= bearing of the ballistic winds for the
same trajectory (52) = 52 -CO;
= ballistic wind speed (04) = 4. q/sec
Al]. following 2-figure groups of figures shew the height of the trajectory
in 100s of metres, as in the 4th group, and 6-figure groups - the ballistic
variation of the temperature, the direction and the speed of the ballistic wind,
as in the 5th group.
2. If some part or other of the data is expressed by a number of figures less
than that ahewn above then the places of the missing figures in front of the
number are filled by zeroes (Os), as in the second group.
Places with no data given at all are filled by nines (9s).
The minus sign before the negative meanings of the variations of pressure
and temperature is not transferred. In this case in place of the minus the
number 5 is added to the first figure.
3. An extra group is placed at the end of the bulletin beginning the data
received by extrapolation.
(37) 4. Take the variation in atmospheric pressure from the 3rd group of figures in
the bulletin and reduce it according to the rule to the height of the QP of the
troop: for every 10m above the troop of the ANS the pressure changes by ipm.
Add this correction to the variation of the pressure, given in the bulletin, if
the troop is lower than the AMS, or subtract it if the troop is higher.
5. Take from the bulletin the temperature, the direction and the speed of the
ballistic wind corresponding to the height of the trajectory shewn in the firing
tables, rounding it off to the nearest height ahewn in the bulletin.
( 38 )
If the bulletin is composed partially according to data received by
extrapolation, then for full preparation of it Use only with the heights of the
trajectory which increase by no more than 50g the heightuptowhich proper obseres,tions
of the ANS were made (extra group of the bulletin).
6. From the bearing of the fire subtract the bearing of the ballistic wind and
thus the "wind angle" is obtained for the analysis of the wind into its constituent
parts.
3. DETERMINATION OF TEE COItRECTIOU FOR THE CHARGE
On the inside of the lid of the packing case for rounds with charges of
pyroylin powder is stuck a label on which are ahewn the size and mark of the
variation in muzzle velocity of the Shell (in %) from the velocity shewn on the
table. The "+" mark shews that the muzzle velocity is higher than that on the
table, the "-" mark shews that it is lower than that in the table.
If there is no label in the box this means that there is no variation in the
muzzle velocity from that in the table, or that it is too small to take into
account.
B. Reference Infonmation.
1. Information about the Gun.
2. Approximate marking of the Rounds.
3. Approximate narking on Packing cases.
SPORP-r
50X1-HUM
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cr, I
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69'
Whole length of barrel 5608mm. (56 klb-)
50X1-HUM
Length of tube 5350m. (53.5 klb.)
Length of rifled part (from beginning of Landes) 4630mw.
Distance from outside surface of bottom of loaded
shell-case to bottom of loaded OF-412 Fragmentation
HE shell 609mm.
Number of landes 40
Twist of rifling Uniform
Length of movement of landes 30 klb.
Volume of powder-chamber with OF-412 shell 7.9 cu.dm.
Gun Mounting
Maximum angle of elevation +180
Maximum angle of depression _50
Horizontal field of fire All-round
Normal length of recoil (with full Charge) 490-550ma.
Limit of length of recoil (with full charge) 570=6
Quantity of fluid (Steol M) in recoil brake 6.4 litres
Quantity of fluid (Steolig) in recuperator 44,4-4.6.1itres
Initial pressure in recuperator 53-57 at.
Weight of barrel with breechblock and
opening mechanism 1430 kg.
(43) MARKING ati PACKING CASE
On the quer side of the box.
Ok an PGM-6 - Shell capped with RGM-6 fuze;
00-4-0 - NuMber of factory which prepared fuze, batch
number and year of preparation of fuze;
V-0-00
- Month, year and number of base which prepared
the cap of the shell;
100-44,6U ec Tank Brief designation of design;
- Weight mark of shell;
85kg. Gross - Weight of box with rounds;
CK-UG - Designation of shell;
2 pieces - Quantity of rounds in box4
Full - Designation of charge;
NDT-3 18 Type of powderl
SECRET
50X1-HUM
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Dec assified in Part - Sanitized Copy Approved for Release 2013/02/27: CIA-RDP80T00246A028600430001-7
Fig. 1 Round with
-Pragmentation HE shell
OF-1412(One -piece),
full charge.
50X1-HUM
A4arking on shell:
00-number of armament
factory; 2-0 -batch number
& year of filling of shell
100-calibre of shell;
N-weight mark( standard
weight)of she 11;T-code of
explosive material;
0E-412-Index of shell.
u
F ?412.
100-44
tee Su si
1-0-00
4,41
F
Marking on shell-case;
U0E-412 -brief index
of round; 100-44,100 SU &
Tank-designation of gun,
in which the round is
used; 18
NDT-3 -type of
AL
powder; 38/0-batch number
& year of preparation ce
powder; 0-index of
powder factory; 1-0
batch number & year of
assembly of rounds;
00-Number of base whidh
assembled rounds;
F- round assembled with
adulterant
50X1-HUM
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Declassified in Part - Sanitized Copy Approved for Release 2013/02/27 : CIA-RDP80T00246A028600430001-7
Rouria' with...larmour-piercin
tracer shell BT64120(with
armour-gbarcing- arid ballistic
cap ) ,DBR-2 fuze
Marking on shell
00-number of armament factory)
1-0 .-batch number and year of
fi/ltlig of shell; tO0 -calibre;
N '-w0:411htmark(standard weight)
of Obail;A-IX-2 -code of
explosive material; DBR-2 -
fuze;BR-412D -index of shell
Marking on shell-case
UBR-412D -Brief index of round;
100-44,100 3U & Tank -
dLsignation of gun,tn which the
round is used;
18
NDT-3 -T -type of powder;
38/0 -batch number and year of
preparation of powder;0 -index
of powder factory;1-0 -batch
number and year of assembly of
rounds;00 -number of ba-.3e which
assembled rounds;? -round
aesemb led with adulterant
USR-412
loosascrAsk
mbr-31r5lie
1 o
0
SECRET
50X1 -HUM
50X1 -HUM
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Dec
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EXAMPLE MARKING ON PACKING CASE
iz4m6 1 00-44 SU 6: Tank
- cKc-roc, Full
00 0.-o
N 2 rilaces NDT-3 14 39/fik,
3"
Illi 11
901z._ GrQ,B; .
1-0-00
50X1-HUM
On the left-hand cIncl
Fig.5 Packing case for shells.
On tat: ri8ht-nan
OF-41T
00-2-0
50X1-HUM
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Dec
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44)
1-0.00
ec k1k `61' powcTii factory;
- Batch number, year of assembly and base which
assembled the rounds.
50X1-HUM
On the left-hand side of the box.
OF-412 - Index of shell
00-2-0 - Number of factory which filled shell, batch number
and year of filling;
- Designation of explosive material;
On the left-hand side of the box.
101-13 Primer cup;
00-5-0 - Number of factory which prepared primer cup;
batch numb er and year of preparation.
The basic distinguishing sign in the marking on packing cases with different
rounds is the index of the shell inscribed on the right-hand side of the box.
CONTENTS Page
1. BASIC ORDERS 2
1. Cease fire 3
2. Fire orders
3. About fire charts
4. About the gun 6
5. About the sights 7
6. About ricochet fire ? 8
2. -AMMUNITION 9
1. Shells 10
2. Fuzes
3. Charges 11
4. Rounds
5. Sorting of ammunition
Sh.ARMOURPIERCING TkACER SHELL FLRE (HAMS & MG FIRE CHAhTS
CHARTS 13
BR-412D Armour-pieroing tracer shell (with armour-
piercing and ballistic caps-fire charts 18
7.62mm. tank-M, 1943 pattern, fire charts 18
IU.OF-412(One..piece)Fi ? .4 _CATION-HE SHELL FIRE CHARTS 20
OF-4.12 (one piece)Fragmentation-HE(Full charge)
Shell Fire Charts 22
Corrections on to target 25
U. AUXILIARY TAMES 26
1. Tables of tangents of angles 28
2. Tables of azimuth micrometer scale units converted into
degrees and minutes . 29
3. Tables of sines of angles 30
4. Table for the analysis of ballistic wind into its
component parts 31
50X1-HUM
RPrIRF-r
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TOL
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UI. DETERMINATION OF FIRING CONDITIONS AMPLLUI1E"
INFORMATTON FOR REFERFNVE _
50X1-HUM
7
A. De us.J.J.J.O. 4,10.11L ,01. J. A.A. A. Byee....L........LAJWALL Ittlittf-f : oft. ? Y.': : Ji ? ?
1. Determination of variation of initial speed
of shell, caused by wear of bore
2. Determination of meteorological conditions
50X1-HUM
35
3. Determination of correction for charge batch .... 37
B. Information for reference 38
1. Information about the gun . 39
2. Example marking of rounds 40
3. Example marking an packing cases . 42
(58) (18 on diagram 3); clearance in each coupling must be not less than 0.3mm;
- weld locking plates 09-50 to the cover by means of electrode E42 0
A clearance of up to 0.5 mm between the lawer surface of the locking plates
and the flat on the cylinder (sketch 23) is permissible.
RECOILING PARTS CATCH ON THE GUARD AS A RESULT OF BENDING OF THE LEFT OR RIGHT
HAND SHIELD OF THE STATIC PART OF THE GUARD.
Produce an artificial recoil of the barrel and check whether the recoiling parts
catch on the left or right hand shield of the static part of the guard.
When it catches take off the guard and correct the shield.
FAULTING AND REPAIR OF ANTIRECOIL APPARATUS
Fluid leak from recoil brake and recuperator (diagram 3)
Detach the moving armour-plating from the cradle and, having moved it forward by
80-100 an, unscrew cap 07-24 from the internal cylinder of the recuperator.
With the aid of the prescribed equipment S642-102 for extracting the barrel with-
draw the barrel 140-150mm and check whether the counterrecoil buffer rod brings
(59) out fluid and also whether the fluid filters through the compressor(?) of the
piston of the caunterrecoil buffer rod, packing rings, air valve and plug.
After checking, screw on cap 07-24, fasten it with a screw, and put the moving
armour-plating back in position.
Causes of faults:
THOSE CMMON TO RECOIL BRAKE AND h41:CUPERATOR
1. tressed down _ or weakly_tightened _ packing _ rings_OZ-224 27:21,_0?7184 08:25 t
ii8e3Z Ldiag.3)
Check whether fluid has filtered out of internal cylinder 07-38, the body of
07-17 gasket, the body of 18-39 gasket, the forward cap 08-22, plugs 08-26 and
08-38 in the positions of distribution of the packing rings.
If the fluid is leaking tighten the packing rings.
If the leak does not stop replace the packing rings by those prepared according
to Appendix 1, sketches 134 and 136.
After either tightening or Changing packing ring 08-18 check the position of
locking plate 08-13 (sketch 24). The looking plate should be situated in the
upper semicircumference in the 90? sector.
If the locking plate is not in the correct position, then put it in its new
place, first of all threading the M4x0.7 thread in the body of the 08-39 gasket
(sketch 24). 50X1-HUM
Drill the apertures for the thread sisuftgrto the apPrtures in locking plate
08-13.
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Dec
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2. Rust on exterior surface of brake piston 08-42 and counterrecoil buffer
rod 07-42. (Diagram 3). 50X1-HUM
If rust is found an the brake and recuperator rods, dismantle the recoil
brake and recuperator and inspect every part.
In the case of unchromed rods, remove the rust, rubbing the affected parte
with clean rag, or polish off by hand with hemp cord.
A light powder mixed with steol M may be used.
Remaining pits with smooth edges can be polished up to a metallic sbeinow?
If there are areas of deep rust on the counterrecoil buffer rod the rod can
be reconditioned by pouring babbitt (tin-antimony-copper alloy for bearings) over
it (chart 7).
The breadth of the turn of the rod for pouring on the babbitt depends on the
size of the affected part, but which must not be greater than 45mm.
Remove deep rust on the surface of an unchromed brake pistol or counterrecoil
buffer rod, taking off the minimum layer of metal (chart 8).
If there is damage to the surface of the chrome on chromiumplated brake
pistons and counterrecoil buffer rods change the recoil brake and recuperator
(Appendix 1) or remove the layer of chrome 1 and the rust under the throne
(chart 8).
In the recoil brake
3. Collar gasket weakly tightened by means of nut 08-8 of 8608-2 gasket
(61) ( 3 ).
Take off the locking plate and tighten ep the collar gasket.
If the flow does not step, add a collar gasket or change the gasket
(Appendix 1), after which plug the nut of the gasket with the locking plate.
If after changing the collar gasket the flow does not stop then the cause
of the flow may be wearing by the pouring on of the babbitt of the aperture of
the nut of the 8608-2 gasket.
In this case pour on some more babbitt and treat as with the brake piston
(chart 9).
In the recuperator
4.. Compressor in the collar of the counterrecoil buffer rod only weakly held
'fast b means of asket nut 0 -20 and c essor of the iston of the
counterrecoil buffer rod
Tighten up the compressor. If the flow does not step add leather washers.
07-48 and 07-9 to the collar and the piston (Appendix 1),
5. Collar sket 0
held fast b co ression nut 0
Tighten the collar gasket. If the flow does not step change the collar
gasket (Appendix 1).
6. Ventilator cone 11-33 loosely adjoining the seat of the rear root 0y,36
(19 on diag.3).
Check whether the fluid is leaking in the union of the valve cone with the
seat in the rear root of the recuperator.
50X1 -HUM
1 The removal of a layerrea6limAn
only permitted in time k
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k01
If there is a leak Change uninAampittp tkoicrriwAspareaRacorcang
to Appendix 1, sketch 135, or else trim the bottom of the seWlith a countersink
(62) reamer or a drill with a flat bit and smooth the valve cone by grinding. 50X1-HUM
If even after this the flow does not stop, change the valve (Appendix 1,
sketch 135).
7. Damage of rubber washers 07-8 and 07-16, and also damage or wear of leather
washers 07-9, 07-18 and flange 07-31 (diag.3).
Change the unserviceable washers and flangel (Appendix 1).
8. Fracture of belleville springs= 07-11 and 07-1/4. (diag.3).
Change the belleville springs (Appendix 1)
LEAKAGE OP NITROGEN FROM THE RECUPEATOR
Depress to its maximum the pivoting section of the gun and moisten valve
cap 07-35 with soapy water. The formation of bubbles indicates the nitrogen
leak from the recuperator.
Causes of fault:
Tube 07-41 is not completely filled with fluid (diag.3).
Elevate the pivoting section of the gun by 10-15? and unscrew the valve by
a half-turn. dhen liquid appears in the T-piece aperture shut the valve quickly
which will result in the hydraulic shut-off of nitrogen in tbe recuperator.
(63)
LENGTHENED RECOIL2
The length of recoil is determined by the documents which accompany gun
from the military unit which sent it for repair, or from the information given by
the people coming with the gun.
The normal length of recoil in firing with full charge should be within the
limits 490-550mm.
The limit of maximum recoil is 570mm.
? In order to avoid receiving incorrect information from indicator 10-213
(diag.2) check its exactness. To do this try transferring recoil indicator
10-214. along the rule of recoil indicator 10-215.
The recoil indicator should be moved by hand and retained in the set
position by the A51240-4 spring (10-216).
If the recoil indicator is not retained in the set position Change the
A51240-14. spring (10-216) by the one prepared according Appendix 1, sketch 146.
Causes of fault:
In the recoil brake
1. Faulty fluid.
Elevate the pivoting section of the gun 6?, unscrew plug 08-38 (diag.3)
from the bralsel.4dinder, and check whether fluid appears out of the plug aperture.
1
When there has been a full change of unserviceable washers and flanges the gun
should be tested by firing (Appendix 7).
2Guns which have gone into repair of a fault - lengthened recoil - after repair
should be tested by firing (Appendix 7).
S F P-r
50X1 -HUM
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TV elaia Anpm nnt annear then it5g9kgrarv to add more thus:
50X1-HUM
2. Wear of the 08-2 piston lining diaa.3).
50X1-HUM
(64) Measure the exterior diameter of the piston lining and compare its size
with the mean internal diameter of the brake cy1inaer1, given in the manual of
the gun.
The difference in diameters should be not greater than 0.4mm.
With a difference greater than 0.4mm. chance the piston linine chart 10).
3. Wear of control washer 08-3 (diag, 3).
Measure the clearance where the eye of the regulating washer is in con-
junction with the largest diameter of the variable gauge spindle. The clearance
should be not more than 0.4mm.
Measure the clearance without taking the regulating washer off the spindle.
If the clearance is greater than 0.4mm, change the regulating washer and
fit it over the largest diameter of the variable gauge spindle2 (chart 11).
To take the old regulating washer off the spindle, unsolder the forward cap
08-22 and screw together with the spindle.
Put a prepared regulating washer an the spindle and attach the forward cap
(65) with the spindle on to the solder PCS 30 as per instructions (Appendix 6);
screw on the cap up to the detainer.
Trim off the superfluous solder on the surface of the spindle protruding
from the cap.
In the recuperator
4. Fluid fault.
Determine from the chart the quantity of fluid in the recuperator.
This should be within the limits of 4.4,4.6 litres.
If the quantity is less than that indicated, fill the recuperator up to the
norm and cheek ty the chart a second time.
5. Faulty pressure.
Check by the pressure gauge the initial pressure in the recuperator.
With the normal quantity of fluid this should be within the limits of 53-57 at.
If the initial pressure is less than that indicated then add more nitrogen,
bringing the pressure up to normal.
1. The mean internal diameter may also be determined in the following way.
Measure the bore of the cylinder along two reciprocal perpendicular diameters for
a distance of 700mm (from the forward end of the cylinder) every 50mm. hake the
first measurement 70mm. from the forward end (cm the side of the "biscuit" lugs).
Add all these measurements together and divide the sum total by their number.
The resulting figure will be the mean diameter.
2. After Changing the piston lining or the regulating washer test the gun by
firing. (Appendix 7).
3. Instead of screwing together the forward cap 08-22 the buffer may be taken
off the spindle. To do this it is essential to drill a countersink for pin 08-16,
knock out the pin and screw together the buffer. After fixing the regulating
washer, screw the buffer on to the spindle as far as it will go, put in the pin
prepared according to sketch 100, rivet it and trim it. 50X1-HUM
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SNORTETTED RECGIV"'" " 50X1-HUM
(66)
(67)
The length o. wte recoiiI. aeterrnined-tregirti-M-Lb/Mitt's? which accompany the
gun from the military unit which sent it for repair, or from the information
given by those coming with tie gun. 50X1-HUM
The length of recoil with firing with full charge should be not less than
490mm.
Causes of fault:
In the recoil brake.
1. 06-8 collar gasket over-tightened by S608-2 gasket nut (diag. 3),
Take off the locking plate. Loosen the tightened collar gasket by
unscrewing the gasket nut. In order to avoid having a flow of fluid through the
gasket after doing that, stop the gasket nut with the locking plate.
2. tendiag of 06-40 spindle and 08-1~ brake piston rod (diag.3).
,ismantle the recoil brake.
Set the spin(de and the rod on the prisms and check their "play" with the
indicator, or with the aid of a marking gauge and feeler.
The play of the spindle should not be more than 1.2mm, and that of the brake
piston roe not more tar 0.6mm.
If the respective plays of the spindle and brake piston rod are greater than
those shewn above straighten the spindle and the rod by means of pressure on the
rod-straightening apparatus, i.e. applying pressure without heating (sketch 25).
3. Catchin of J8-10 buffer valve valve not withdrawin from 06-1r, buffer
shear: diag. 3).
buffer valve must move freely, and without catching, over the end part of the
spindle.
If the valve does catch, trim the raised metal on the end part of the spindle
and in the buffer valve aperture, but without scratching.
4. A.tazir....i.08-2ston sleeves (on _guns newly delivered: -..dag. 3)
Measure the external diameter of the piston sleeve on two reciprocally
perpendicular diameters every 121m2; the first measurement should be made at a
distance of 4nii, from the forward end of the sleeve.
By the actual measurements of the lining establish whether there are any
bulges in it. If there are change the rod liningl (chart 10).
In the 7,ecuperator
5. Surplus of fluid
Check according to the chart the quantity of fluid in the recuperator.
This should be within the limits of 4.4-4.6 litres.
If the quantity is greater than that Shewn remove the surplus fluid and
check a second time.
(65) 1. A gun having come for correction of a fault - shortened recoil - should be
tested by firing after repair (Appendix 7).
(67) i. When there has been a change of rod lining, test the gun by firing
(Appendix 7).
SECRET
50X1-HUM
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(68)
6. Stu-plus of
50X1-HUM
With a pressure gauge check the initial pressure in the recuperator. With
the normal quantity of fluid this should be within the limits of 53-57 a
4e0X1-HUM
If the initial pressure in the recuperator is greater than that shewn above,
release the surplus nitrogen, bringing the pressure down to normal.
7. I-tickers in the collar of the recuperator rod overtigitened 13y 07-20 collar
nut, and packers of the piston rod of the recuperator by the 07-11..peLt_(ciar.0)
Loosen those of the packers in the recuperator rod collar which are over-
tightened, and unscrew collar nut 07-20, but in such a way that the fluid will
not leak.
Lepress the pivoting section to its maximum and release the nitrogen from
the recuperator, bringing the pressure down to atmospheric. Replace the
pivotings section back at horizontal and unscrew the nut from the recuperator
rod.
With the aid of the 36112-411 implement for cetermining the quantity of
fluid, draw the recuperator rod out 300-400mm and take the implement off the rod.
Bring the pressure in the recuperator up to at., then the recuperator
rod should oegin smoothly and without jerks to move into the recuperator
cylinder.
If the recuperator rod will not go in, dismantle the recuperator and loosen
those of the piston rod packers which are tightened by 07-13 nuts, after which
assemble the recuperator and before re-installing it on the gun check whether the
packers have tightened correctly. This is determined on the basis of whether
the recuperator rod (which has been drawn out 300-).00mm) will go in at a pressure
of 2-5 atmospheres in the recuperator.
8. Bending of 07-42 reCuperator rod (diag.3).
Dismantle the recuperator.
Set the rod on the prisms and check its bending with the ineicator or with
the aid of a marking gauge and feeler.
Bending of the rod should not exceed 2.4mm.
When the bending is greater than 2.4mm. straighten the rod with a press on
the rod-straightening implement, i.e. by press - clamping without heat.
In the coupling of the cradle and the barrel.
9. Increased friction in the coupling of the cylindrical part of the barrel
with the 09-53 cradle bushes (diag.1).
Take off the barrel and check whether there are scratches on the bushes or
adherences -Nf bronze or braes on the cylindrical part of the barrel.
Trim the raised metal on the bushes and beading of bronze or brass on the
cylindrical part of the barrel, after which set the barrel in position.
(69) Non-return to battery or counterrecoil with ierksl
The nature of the counterecoil is determined by the documents accompanying
the gun from the unit which sent it for repair, or from the information given by
those personnel coming with the gun.
Non-returns to battery and counterrecoils are not permissible.
Check the state of the cap in order to avoid non-returns to battery as a
result of dirt in the air-escape aperture of the 07-24 cap. 50X1-HUM
1. A gun which has been sent
counterrecoil with jerks should
Ii
miection of non-return to battery or
iT by firing (Appeneix 7).
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?
In the recoil brake
50X1 -HUM
1. Collar gasket 08-8 over-tightened by gasket nut S608-2 (diag.3).
Cp. "Shortened recoil", Appendix 1.
2. Nicks and scratches on the 08-2 rod lining and 08-15 buffer (diag.3).
Dismantle the recoil brake and inspect the rod lining and the buffer.
Trim the raised metal.
IC after triming the fault is not corrected, change the rod lining and
buffer' (charts 10 & 12).
3. Bulges en 08-2 rod lining (with guns discharged for the first time; (diag.3).
(70) Cp. "Shortened recoil", Appendix 4.
4. Bending of the 08-40 spindle and the 08-42 brake rod (diag. 3).
Cp. "Shortened recoil", Appendix 2
5. Packers in the gasket of the countercoil buffer rod over-tightened by 07-20
collar nut and packers of recuperator piston by 07-13 nuts (diag. 3).
Cp. "Shortened recoil", Appendix 7.
6. Fluid fault.
Cp. "Lengthened recoil", Appendix 4.
7. Faulty pressure
Cp. "Lengthened recoil", Appendix 5.
8. Wear of 07-42 cauntercoil buffer rod (diag. 3).
Cp. "Shortened recoil", Appendix 8.
In the coupling of the cradle with the barrel
9. Increased friction in the coupling of the cylindrical part of the barrel
with the 09-53 cradle bushes, and also in the coupling of the 09-101 cradle cotters
with the guiding surfaces of the groove of the 01-8 cotter sommo.
Take off the barrel and check whether there are any adherences of bronze or
brass on the cylindrical part of the barrel and scratches on the cradle bushes, and
also on the cradle cotter and the guiding surface of the 01-8 cotter groove.
Trim the bronze or brass beadings and the raised metal, after which set the
barrel in position.
(71) ABRUPT COUNTERRECOIL (1)
(Counterrecoil with knocking)
The nature of the counterrecoil is determined from the documents accompanying
the gun from the military unit sending it for repair, or from the personnel
accompanying the gun.
The counterrecoil should be smooth and without knocking.
1. When a rod lining and buffer has been changed test the gun by firing
(Appendix 7). 50X1 -HUM
SECRET
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In the recoil brake
SECRET 50X1-HUM
1. Fluid fault
Cp. "Lengthened recoil", Appendix 1.
50X1-HUM
2. Catching of 08-19 buffer valve, as a result of which the valve does not go
right up to 08-15 buffer shear (diag. 3).
Dismantle the recoil brake.
The buffer valve should move freely and without catching along the end part
of the spindle.
If the valve does catch, without scratching trim the raised metal on the end
part of the spindle and in the aperture of the buffer valve.
3. 08-19 buffer valve loosely adjoining the 08-15 buffer shear (diag. 3).
Clamp the valve to the buffer shear, pour in paraffin through the aperture
In the buffer and check whether the paraffin leaks between the valve and the
buffer shear.
(72) With a leakage of paraffin reset the valve against the buffer shear-so that
where their surfaces adjoin there are no gaps. Reset the valve with GOI paste
or a light abrasive powder with steol M.
(71)
After resetting a second time check whether the paraffin leaks between the
valve and the buffer shear.
4. Wear of 0b-15 buffer (diag. 3).
Measure the external diameter of the buffer and comptre its size with the
size of the minimum diameter of the bore of the brake rod', as shewn in the manual
of the gun.
The difference in diameters should be not more than 0.25mm.
With a difference greater than 0.25=6 change the buffer2 (chart 12).
In the recuperator
5. Excess fluid
Cp. "Shortened recoil", Appendix 5.
6. Excess pressure
Cp. "Shortened recoil", Apnendix 6.
In the cradle
7. Corrosion of S609-20 shock absorbers (diag. 1).
Change the unserviceable shock absorbers by those prepared according to
Appendix 1, sketch 139.
1. A gun which has been sent for correction of abrupt counterrecoil should
be tested by firing after repair (Appendix 7).
(72) 1. In the absence of measurements of the brake rod in the manual determine the
minimum internal diameter by measuring the bore of the rod. The measurements
should be taken of two reciprocal perpendicular diameters every 50mm for a distance
of 720mm from the end of the rod; the first measurement taken 90mm from the end
of the piston rod.
(72) 2. With a change of buffer test the gun by firing (Appendix 7). 50X1-HUM
r,
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(73)
(-74)
.1.144.2 1.J.Jwi414.2 vAJJA.14,.4.1.4,1_ 1140 .1.111LAA.airuw,.114110Rjuniluinalmi.i k.,14.J.LaidaA+aVL j.flS
RECUPER? ATOR, IN THE B6RE OF THE BRAKE ROD, AND ON THE SPINDLE. 50X1 -HUM
50X1 -HUM
Clean off rust in the external cylinder of the recuperator with a wire brush.
With deep rust on the surfaces of the parts shewn above or with a defective
(bulging) layer of chromium on the chromium plated internal cylinder proceed as
follows.
Remove deep rust from the brake 'cylinder, the unchromed internal cylinder,
of the recuperator, the bore of the brake rod, and the spindle, removing the
minimum layer of metal from all of the surfac2s, and in the external cylinder of
the recuperator perform local trimming.
In the case of damage to tne layer of chrome on the chromed internal cylinder
of the recuperator change the recuperator (Appendix or remove the layer of
chromel and the rust underneath it (charts 8, 13 & 14).
After removing the rust from the bore of the brake cylinder the diameter of
the bore should be less than the internal diameter of the thread of the cylinder
(for tne body of the 08-39 gasket) by at least 0.2mm.
In the event of there being a need for a considerable increase in the
diameter of the bore of the cylinder, suitably deepen the thread of the cylinder.
The remaining shallow cavities on the internal surface of the brake cylinder
with smooth edges may be brought up to a metallic shine in that o ndition of
trimming.
The remaining cavities on the internal surface of the internal recuperator
cylinder are permitted to remain providing they do not cause scratching of the
07-9 leather washers of the piston of counterrecoil buffer rod or a leaking of
fluid through the packers of the piston of the counterrecoil buffer rod.
The remaining cavities should be brought up to a metallic shine.
BREAKING OF THE THREADED JOINT OF THE 07-6 PISTON BODY WITH THE 07-42
COUNTERRBOOM BUeFER ROD. (On the guns of first issue)
(Diagram 3)
Check whether there is any unsteadines in the threaded joint of the Piston
body with the counterrecoil buffer rod. No unsteadiness is permissible.
If there is any unsteadiness it is essential:
To unscrew the two 07-13 nuts and take all the parts out of the piston body.
To heat the piston body in the furnace up to a bright yellow iridescence and
while it is in this hot state immediately tighten (screw up) the oiA4- body as
far as it will go with the key; pierce and bore an apperture of .4'u? mm in
the piston body and the counterrecoil buffer rod (sketch 26);
(75) - to countersink an aperture on two sides at an angle of 900 to a depth of
2rcm;
- to prepare an 07-14 pin (sketch 26);
- to insert the pin into the aperture, spread it on two sides and trim the
end of the pin flush with the surface of the piston body;
1. It is only permitted to remove the layer of chrome without subsequent
rechroming in time of war.50X1 -HUM
F 7 r
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50X1-HUM
- clean off the soot from the surface ogrAgcon body and the rod and
assemble the piston r
HOLLOWS AND H0LES1 IN THE REn'tdiTtiR"rattiXEldngarktrEfibah THE INTERNAL
CYLINDER OF THE RECUPERATOR 50X1 -HUM
Remove the protuberances on the internal surface of the cylinders produced
by the hollows in the external surface (chart 15). Weld up the holes measuring
up to 15=4 and seal those greater than 15mm but not greater than 80x80imm in the
brake cylinder and those not greater than 50x75mm in the internal cylinder of the
recuperator by welding in inserts (chart 15).
If it is impossible to remove the protuberances on the internal surface of
the cylinders, cut out the damaged parts and seal the cylinders with inserts.
If there are holes in the internal recuperator cylinder greater than 50x75mm
change the recuperator (Appendix 1).
50X1 -HUM
1. Sealing holes in the cylinders is permitted only in time of war.
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(.86) with the breaking off of 2 fo,a+h vs.. 4. 4 .... an insert (chart 19).
50X1 -HUM-
50X1 -HUM
In the case of teeth or tne cog wheel breaking off to any distance and a
height not greater than 5mm from the top, or up to 25mm in length and any height,
weld a layer of metal on to the damaged teeth by an E50A 4mm electrode and trim
according to a gauge prepared from the outline of a serviceable tooth. With
teeth breaking off to a distance greater than 25mm and a height greater than 5mm
from the top, insert a dowel (,hart 20).
(89)
DAMAGE AND REPAIR OF SIGICING EQUIPMENT
STIFF MOVEMENT OF THE MECHANISM OF THE SPIRIT LEVEL
Test the mechanism by operation.
Causes of fault:
1. 10-63 spirit level worm over-tightened by A51011-34 nut (diag. 2)
Adjust the movement of the mechanism, unscrewing the nut and making
the worm has no axial motion.
2. Bending of the indicator of the 10-60 spirit level base (diag. 2).
Turning the spirit level worm check whether the 10-60 spirit level base
catches on the 10-59 spirit level casing.
sure that
If there is any catching dismantle the spirit level and straighten,
straightening the indicator of the spirit level base without heating (cp.
"Checking of spirit level").
3. Over-tightened 10-67 spirit level base screw (diag. 2).
Adjust the movement of the mechanism, loosening the screw.
4. Catching in the join of the 10-63 spirit level worm with the worm gear of
the 10-60 spirit level base as a result of bending of the worm (diag. 2).
Test the mechanism by operation; in the places where the worm is bent
catching will be observed.
Replace the unserviceable worm (Appendix 1, sketch 139).
5. Fracture or settling of the 10,-69 spring (diag. 2)
Withdraw the 10-63 worm from the spirit level casing.
Withdraw the 10-60 spirit level base 1.5 - 2mm and release. The spring
should return the spirit level base to its original position.
If the base does not return to its original position, replace the spring by
one prepared according to chart 4.
DIFFICULT USE OF SPIRIT LEVEL
Reasons of fault:
1. Insufficient sensitivity of the air bubble in the level.
Slowly turning the flywheel of the 10-63 spirit level worm trace the movement
of the bubble of the level. The bubble should move smoothly in the ampoule,
without jerkiness.
If the movement of the bubble is not smooth replace the 3b10-15 level
(Appendix 1).
50X1 -HUM
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(90) 2. Fracture or settlin7 of the 10,-56 tube of the level, as a result of which
the Sb10-1 level is pulled ? in the 10-0 s irit level base. dia . 2) 50X1 -HUM
;(91)
Replace the Sb1015 level (Appendix 1).
CHECKING OF THE SPIRIT LEVEL
Place the tank on a flat area with nether longitudinal nor lateral heeling.
Set the calibrated regulating level along the line of graduations on the
control platform of the barrel.
Revolving the flywheel of the elevating mechanism of the gun, bring the
bubble of the control level to the centre.
Revolving the flywheel of the 10-63 spirit level worm, bring the bubble to
the centre. At this stage the indicator of the spirit level base should be
against the 0 graduation of the scale on the spirit level casing (no disagreement
greater than 10 thousandths is permitted), and the 0 graduation of the scale on
the 10-62 graduated ring - against the indicator of the spirit level casing.
If the 0 graduation of the scale on the ring should not be against the
indicatorl then loosen the 10-64 screw and turn the 10-62 graduated ring round
so that the 0 graduation is against the indicator on the casing, after which
tighten up the ring again with the 10-64 screw.
If there is a disagreement between the indicator of the spirit level base
and the 0 graduation of the scale on the casing greater than 10 thousandths, take
the indicator off the base and fix a new one against the 0 graduation of the
scale on the casing.
DISPARITY BETWEEN THE SPIRIT LEVEL READINGS AND THE ACTUAL ANGLES OF
ELEVATION OF THE BARREL
Checking takes place in the case of faulty zero laying of the spirit level
(cf. above "Checkin: of the spirit level").
Set the tank on s, flat surface with neither longitudinal nor latitudinal
heeling.
Turning the 10-63 spirit level worm in an anti-clockwise direction set on
the spirit level scale -0 -50 (-3?).
Working the elevating mechanism of the gun bring the bubble of the spirit
level to the centre (between the centre graduation lines on the ampoule of the
level).
Determine the angle of depression of the barrel with the aid of a quadrant
set on the control platform along the graduation line.
Such checking should be made every 50 thousandths up to the maximum angle
of elevation of the barrel, turning the 10.-63 worm all the time. in an-anti-
clockwise direction, and then, decreasing the angles of elevation of the barrel,
do a check on the same angles in the return sequence. In this case work the
spirit level by turning the worm only in a clockwise direction.
Discrepanciestetween the readings of the quadrant and those of the spirit
level should be not more than 2 thousandths.
Causes of fault:
1. 10-63 spirit level worm only weakly tightened by the A51011-34 nut (diag. 2).
Check whether the worm has any axial motion.
(92) If there is any axial motion of the worm tighten it up by the nut, but in
such a way that the movement of the spirit level mechanism is not stiff.
SECRET 50X1 -HUM
Declassified in Part - Sanitized Copy Approved for Release 2013/02/27: CIA-RDP80T00246A028600430001-7
Declassified in Part - Sanitized Copy Approved for Release 2013/02/27: CIA-RDP80T00246A028600430001-7
2. Settli
50X1-HUM
Replace the spring washer ,by one orenared ae.neirA4.%, k- ?TUX 1, sketch
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3. Buckling or fracture Of i0?b1 spring (diag. 2).
Replace the spring with one prepared according to chart 4..
4. Bending of the 10-160 left shield of the immobile part of the guard (diag. 2).
If, in the absence of defects 1-3, or after their elimination, the readings
of the spirit level do not correspond to the actual angles of elevation of the
barrel, check whether the left Shield is bent.
If it is bent, remove the spirit level, straighten the shield replace the
level, and check once Again whether the spirit level readings match the actual
angles of elevation of the barrel.
If the straightening of the shield has not succeeded in eliminating the
discrepancies of the spirit level readings, it is permissible to put packing
washers of steel of any type on to the 10.-97 pin under the forward or the rear
.part of the base of the 10,-59 level casing.
^1, ey ? rf7,-1.
OF THE TELESCOPIC JOINTED SIGHT
Carry out the ChP,cking of the sight in sequence and by the means indicated
in the Servicing Manual of the 100 mm tank gun.
Guns may go into repair with TSh2-22 sights. TSh2-22 sights may be set in
09-712 brackets.
50X1-HUM
FECII ET
narinQcifipri in Part - Sanitized Copy Approved for Release 2013/02/27: CIA-RDP80T00246A028600430001-7