The Tatra 138 was a

truck A truck or lorry is a motor vehicle designed to transport cargo, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame constructi ...

produced in

Czechoslovakia , rue, Чеськословеньско, , yi, טשעכאסלאוואקיי, , common_name = Czechoslovakia , life_span = 1918–19391945–1992 , p1 = Austria-Hungary , image_p1 ...

by the Tatra company. The immediate successor to the Tatra 111, the model introduced a number of new features while continuing the evolution of Tatra concept. The truck was produced from 1959 to 1971.

History

The decision to replace the Tatra 111 was made in 1952 as part of a central state planning economy, where Tatra

Kopřivnice Kopřivnice (; german: Nesselsdorf) is a town in the Moravian-Silesian Region of the Czech Republic. It has about 21,000 inhabitants. It is an industrial town, known especially for the vehicle manufacturer Tatra. Administrative parts Villages o ...

was to produce 7-10

ton Ton is the name of any one of several units of measure. It has a long history and has acquired several meanings and uses. Mainly it describes units of weight. Confusion can arise because ''ton'' can mean * the long ton, which is 2,240 pounds ...

utility

s. In 1956 at II.

Czechoslovak Czechoslovak may refer to: *A demonym or adjective pertaining to Czechoslovakia (1918–93) **First Czechoslovak Republic (1918–38) **Second Czechoslovak Republic (1938–39) **Third Czechoslovak Republic (1948–60) **Fourth Czechoslovak Repub ...

Machinery

Expo An expo is a trade exposition. It may also refer to: Events and venues * World's fair, a large international public exposition * Singapore Expo, convention and exposition venue ** Expo Axis, one of the world's largest membrane roofs, constructe ...

in Brno, Tatra exhibited 2 new models, the T137 and T138. Both vehicles had up to 70% of parts in common across the range. New design features were introduced, such as improvement in driver environment and usability e.g.

hydraulic Hydraulics (from Greek: Υδραυλική) is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. At a very basic level, hydraulics is the liquid counte ...

power steering, a compressed air assisted clutch and electro-pneumatic auxiliary

gearbox Propulsion transmission is the mode of transmitting and controlling propulsion power of a machine. The term ''transmission'' properly refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive vehicles), differe ...

gear A gear is a rotating circular machine part having cut teeth or, in the case of a cogwheel or gearwheel, inserted teeth (called ''cogs''), which mesh with another (compatible) toothed part to transmit (convert) torque and speed. The basic ...

selection.

Design and technology

The design was of central backbone tube construction with modular power train concept in

4×4 Four-wheel drive, also called 4×4 ("four by four") or 4WD, refers to a two-axled vehicle drivetrain capable of providing torque to all of its wheels simultaneously. It may be full-time or on-demand, and is typically linked via a transfer case ...

, 4×2, 6×6, 6×4 and 6×2 configuration. Version 4×2, 6×4, and 6×2 were produced in very low quantity. The main advantages of central load carrying backbone tube are in its high torsion and bend strength protecting truck body against load stresses. The secondary advantage is that it houses all important parts of the drive train. In addition, it enables a concept of modular construction where designers and customers can specify 4, 6, wheel drive and various length and wheelbase combinations.

Engine

The engine was located ahead of the front axle. It featured an

air-cooled Air-cooled engines rely on the circulation of air directly over heat dissipation fins or hot areas of the engine to cool them in order to keep the engine within operating temperatures. In all combustion engines, a great percentage of the heat ge ...

V8 75° with

dry sump A dry-sump system is a method to manage the lubricating motor oil in four-stroke and large two-stroke piston driven internal combustion engines. The dry-sump system uses two or more oil pumps and a separate oil reservoir, as opposed to a con ...

design and a new featured thermostat controlled cooling fan by engine oil temperature via

clutch drive to reduce noise and fuel consumption. The engine was also used in the

OT-64 The OT-64 SKOT (Czech acronym for: ''Střední Kolový Obrněný Transportér'', and/or Polish Średni ''Kołowy Opancerzony Transporter'' – medium wheeled armoured transporter) is an amphibious, armored personnel carrier (8x8), developed joi ...

APC.

Chassis

Central backbone tube, front and rear axles with independent swing half axles. The front

suspension Suspension or suspended may refer to: Science and engineering * Suspension (topology), in mathematics * Suspension (dynamical systems), in mathematics * Suspension of a ring, in mathematics * Suspension (chemistry), small solid particles suspende ...

by torque arms (

torsion bar A torsion bar suspension, also known as a torsion spring suspension, is any vehicle suspension that uses a torsion bar as its main weight-bearing spring. One end of a long metal bar is attached firmly to the vehicle chassis; the opposite end termi ...

s) and hydraulic shock absorbers. The rear suspension by longitudinal half elliptic

leaf spring A leaf spring is a simple form of spring commonly used for the suspension in wheeled vehicles. Originally called a ''laminated'' or ''carriage spring'', and sometimes referred to as a semi-elliptical spring, elliptical spring, or cart spring, i ...

s. Front axle drive selectable on demand, differential locks electro-pneumatically controlled via dash switches. *Front track = *Rear track = *Wheelbase = model specific *Tatra T138 6×6 PP2, P3, PP6 = + ** Tatra T138 6×6 PR14, PPR S3, PR S1, P19 = + *** Tatra T138 4×4 = *

Ground clearance Ride height or ground clearance is the amount of space between the base of an automobile tire and the lowest point of the automobile (typically the axle); or, more properly, to the shortest distance between a flat, level surface, and the lowest p ...

Transmission

* Main

- 5+1 (2-5 gear synchronized) **Auxiliary

- 2 speed (half split electro-pneumatic control) ***Step down

transfer case A transfer case is a part of the drivetrain of four-wheel-drive, all-wheel-drive, and other multiple powered axle vehicles. The transfer case transfers power from the transmission to the front and rear axles by means of drive shafts. It also syn ...

* Clutch - 2x plate dry

Brakes

* Main wheel brakes ----> dual circuit full air drum brakes ** Park brake ----> mechanical via output shaft at the back of the gearbox *** Supplementary brake ---->

exhaust brake An exhaust brake is a means of slowing a diesel engine by closing off the exhaust path from the engine, causing the exhaust gases to be compressed in the exhaust manifold, and in the cylinder. Since the exhaust is being compressed, and there is no ...

electro-pneumatically controlled

Bodywork

All steel cab construction with various body builder equipment such as tippers, flatbeds, concrete mixers, tankers, cranes, excavators and firefighting. The vehicle had a top speed of 72 km/h, capable of water crossing depth , with maximum payload of and could tow

trailers Trailer may refer to: a Transportation * Trailer (vehicle), an unpowered vehicle pulled by a powered vehicle ** Bicycle trailer, a wheeled frame for hitching to a bicycle to tow cargo or passengers ** Full-trailer ** Semi-trailer **Horse trail ...

up to GCM.

Production

Total production exceeded 45,900. The Tatra T138 was exported to the

USSR The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen nationa ...

Bulgaria Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria,, ) is a country in Southeast Europe. It is situated on the eastern flank of the Balkans, and is bordered by Romania to the north, Serbia and North Macedo ...

Romania Romania ( ; ro, România ) is a country located at the crossroads of Central, Eastern, and Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, Serbia to the southwest, Moldova to the east, and ...

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populou ...

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...

Austria Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...

Yugoslavia Yugoslavia (; sh-Latn-Cyrl, separator=" / ", Jugoslavija, Југославија ; sl, Jugoslavija ; mk, Југославија ;; rup, Iugoslavia; hu, Jugoszlávia; rue, label=Pannonian Rusyn, Югославия, translit=Juhoslavija ...

and the

Netherlands ) , anthem = ( en, "William of Nassau") , image_map = , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of the Netherlands , established_title = Before independence , established_date = Spanish Netherl ...

**Primary variants: * T138 S1 - one-way tipper * T138 S3 - three-way tipper * T138 V,VN - civilian and military flatbed * T138 P1V - military special * T138 CAS - firefighting unit * T138 PP6V - excavator * T138 PP5, PP4V, PP7 - tanker * T138 P3, P11, P18, PP2, PP5, PP6, PP7, PP8V - crane * T138 PP7 - concrete mixer

External links

Tatra a.s.
*Tatra Portal {{Tatra models T138 Cars of the Czech Republic All-wheel-drive vehicles Trucks of the Czech Republic Vehicles introduced in 1959