INFORMATION ON THE SOVIET DT-55 TRACTOR

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000700200045-8
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 4
• Document Creation Date: December 22, 2016
• Document Release Date: August 31, 2011
• Sequence Number: 45
• Publication Date: August 24, 1954
• Content Type: REPORT

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CLASSIFICATIOr.I c.r.-
- - - - - - E-N-'I'-I-;,-L
CENTRAL INTELLIGENCE AGENCY
REP
INFORMATION FROM
FOREIGN DOCUMENTS OR RADIO BROADCASTS CD
SUBJECT Economic; Technological -
HOW
PUBLISHED Semimonthly, monthly peri
Agriculture, machine
building
odicals
DATE OF
INFORMATION 1953-1954
DATE DIST. Aug 1954
WHERE
PUBLISHED Moscow
DATE
NO. OF PAGES 5
g- SLISHED Oct 1953, Mar 195!
SUPPLEMEN, TO
REPORT NO.
THIS IS UNEVALUATED INFORMATION
INFORMATION ON THE SOVIET DT 55 TRACTOR
STATE
ARMY
SPECIFICATIONS AND TEST RESULTS -- Moscow, Tekhsovety MTS, No 19, Oct 53
The DT-55 tractor, developed at the Stalingrad Tractor Plant, will play
a large part in mechanizing the draining and reclaiming of swamplands. The
tractor is designed for land reclamation work and for general use with farm
machines on reclaimed land. Decrees of the 19th Party Congress call for the
reclaiming of swampland in the Belorussian, Ukrainian, Latvian, Lithuanian,
Estonian, and Karelo-Finnish SSRsrin the RSFSRrin the Barahinskaya lowlands,
and in other regions. During the Fifth Five-year plan, the area of the re-
claimed land mist he increased by 40-45 percent.
The DT-55 is based on the DT-54 tractor, and differs chiefly in the
design of the undercarriage. The idler wheel., including tension-adjusting
and shock-absorbing devices, the tracks, and the drive sprocket were redesigned.
Changes were made in the design of the track roller frames, support rollers,
and track rollers. Some changes were made in tae design of the frame, the
body, and the hood.
The ground pressure of the DT-54 tractor is 0.38 kilograms per square
centimeter. By increasing the width and length of the track links of the
DT-55, the ground pressure was decreased to 0.22 kilograms per square centi-
meter.
CLASSIFICATION C?O-N-F-I-D-E -tr-T-.I-A-L
_ rvsas ~~ DISTRIBUTION
Ire i -j" -I ---~-7---r-T
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The foll1owing table shows the specification variations
and the DT-51+:
Speeds (discounti
ng slip-
Jog), in km/hr
First gear
3.87
Second gear
5.0
Third gear
5.85
Fourth gear
6.77
Fifth gear
8.52
Calculated drawbar pull
(on stubble field, dis-
counting slipping), in kg
First gear
2
636
Second gear
Third gear
,
1,936
Fourth gear
1,576
Fifth gear
1,306
85'6
Over-all dimensions, in mm
Length
Width
3,946
Height
2,143
2,326
Width between track
centers
1,577
Distance between idler wheel
and drive sprocket, in mm
2,720
Track width, in mm
540
Track link pitch, in mm
174
Avera'. ground pressure per
square entimeter, in kg
Weight (with fuel and water),
in kg
2,850
2, loo
1,750
1,450
1,000
3,660
1,865
2,350
1,435
2,604
390
uiu
fu7-7 are centa on tests
conducted on a peat field with moisture content o
of 10 centimeters, and a 05e7 ieters to a depth
ground-water level of 30-40 c centimmeters:
Gear
RPM
Speed
(km/hr
Drawb
H
Drawbar Pull
Fuel Con-
sum tion
p
S11-
ar
P
(kg)
(kg/hr)
in )
1
2
1,270
3.75
37.2
2,690
11
2
1,290
4.96
37.8
2,060
11
2
3.
2
4
3
4
1,285
5.82
33.4
1,560
.
11
55
.
1
1,290
6.74
31.4
1,260
.
11.55
.9
1.5
(Article by Ye. Sorokin)
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COMPARISON OF DT-55 WITH DT-54 -- Moscow, Avtomobil'naya i Traktornaya Promyshlen-
nost', Mar 54
The engineering and technical personnel of the Stalingrad Tractor Plant
have developed the DT-55 tractor for lend reclamation work. The basic design
of the DT-55 tractor is identical with that of the DT-54 tractor. Disposition
of the engine, transmission, steering, fuel tank, and other units on the DT-55
tractor is identical with that of the DT-54 tractor.
The base of the DT-55 tractor is 570 millimeters longer than the base of
the DT-54 tractor. The increase in length has been attained by mounting idler
wheels on individual suspension units with leaf springs. These suspensions
serve as supporting rollers and for, tightening or loosening the track.
The width of the DT-55 tractor track is 530 millimeters; the width of the
track on the DT-54 tractor, is 390 millimeters. The tractor frame of the DT-55
tractor is equipped with a front bar on which the axles of rocking shafts of
idler wheels are fixed. The length of the track shoe has increased to 196 milli-
meters, as compared to the 174-millimeter track shoe on the DT-54 tractor. The
distance between grousers has been made 25 millimeters longer than on the DT-54
tractor.
The ground pressure of the DT-55 tractor is 0.20-0.22 kilograms per square
centimeter.
Tests conducted in 1952 showed that the wide track and the low ground
pressure permit the DT-55 tractor t,, work on swampy ground on which no other
tractor can work. Two drained areas were used to test the DT-54 and DT-55.
One plot of land had been plowed to a depth of 45-50 centimeters and disked
3 days before he tests were conducted. The other plot of land was unplowed,
drained virgin soil with a top layer of sod, 5-7 centimeters deep.
The method of testing consisted of gradually increasing the workload with
each speed until either the tractors started slipping or the engine died. The
PBYa-56 swamp plow and the 5-80 tractor were used to test the pull of each
tractor.
The maximum pull for each speed of the tractors is given below (in pounds):
Plowed Field
Virgin Soil
1st
'neerl
1,600-1,700
2,200-2,300
2,200-2,300
3,100-2,200[sic,
2d
speed
1,500-1,600
2,200-2,300
2,100-2,200
2,900-3,000
3d
speed
1,600-1,700
2,100-2,200
2,200-2,300
engine died
4th
speed
engine died
engine died
engine B'-d
engine died
The tracks of the DT-55 tractor withstood 30-40 percent more drawbar pull
than the tracks of the DT-54 tractor before sinking on swampland.
The Stalingrad Tractor Plant is producing a group of DT-55 tractors for
extensive testings. -- V. A. Rodionov and V. I. Gorozhankin
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