The history of the domestic automotive industry is full of examples when factories that created products for military needs became the flagships of the civilian industry. The brightest representative of this transformation is the Miass Automobile Plant, which gave the country the legendary Ural brand. However, few people think about which truck became the founder of this glorious family, which launched conveyor production back in 1951.
Many people mistakenly believe that the first-born was the famous three-axle all-terrain vehicle, which became a symbol of the Soviet automobile industry, but reality dictates different facts. The very first Ural truck is a two-axle Ural-355 vehicle, which was a deeply modernized ZIS-150. It was this car that laid the foundation for technologies that subsequently made it possible to create heavy SUVs that conquer any road.
In this article we will analyze in detail the path to the establishment of the plant, the technical features of the first model and the difficulties that the engineers had to face. You will learn how military experience helped create a civilian vehicle, which for decades served faithfully on construction sites and on collective farms throughout the country.
Background to the creation of the Miass Automobile Plant
During the Great Patriotic War, Soviet industry faced an urgent need to create new production facilities far from the front line. It was then, in 1941, on the basis of the evacuated Moscow plant named after Stalin (ZIS) and with the participation of equipment from other enterprises, that the Plant Ural-355. The initial task was to produce engines for tanks, which required enormous effort and a restructuring of all logistics.
After the end of the war, the country's leadership faced the question of the conversion of defense enterprises. It was decided to create a powerful center for the production of trucks capable of operating in the harsh conditions of the Urals and Siberia. It was on November 20, 1951 that the first Ural-355 car rolled off the assembly line, which is officially considered the first Ural brand truck.. This event marked the birth of a new era for the entire region.
The engineers had to solve a very difficult task: adapt the Moscow design to the existing production capacity and local operating conditions. It was necessary not only to assemble a car from ready-made parts, but to introduce a number of innovations that would allow the car to withstand overloads and run on low-quality fuel. This period became a time of intense experimentation and search for optimal solutions.
Design features of the first Urals
The first Ural-355 truck was based on ZIS-150 units, but featured a number of significant improvements designed to increase its reliability. The engine, designated Ural-353, was boosted and had an increased displacement compared to the prototype. This made it possible to increase power, which was critical for working in mining areas with their difficult terrain.
The designers paid special attention to the engine cooling and lubrication system. Taking into account the climatic characteristics of the region, where the temperature in winter could drop below 40 degrees, it was introduced dual lubrication system and improved fluid circulation. The car's cabin was made of wood and metal, which was considered the norm at that time, but provided sufficient strength and maintainability in field conditions.
The chassis has also undergone changes. The springs were strengthened and the driveline design was changed. All these measures made it possible to increase the vehicle’s carrying capacity to 5 tons, which was an excellent indicator for a two-axle truck of that period. It is important to note that many components were unified with other equipment, which simplified the supply of spare parts to remote areas.
⚠️ Warning: When studying the technical documentation of the early Urals, keep in mind that metric measurement systems and tolerances in the 1950s were different from modern standards, which may lead to errors if you try to manufacture parts today.
Why was the cabin made of wood?
In the post-war years, there was an acute shortage of high-quality sheet steel. The use of a wooden frame with metal cladding made it possible to quickly establish mass production of equipment, without waiting for supplies of rolled products. In addition, wood is easier to repair in the absence of welding equipment.
Technical characteristics of the Ural-355 model
To understand the scale of engineering at that time, it is necessary to consider in detail the parameters of the machine. The Ural-355 was a flatbed truck with a 4x2 wheel arrangement. Its power unit ran on gasoline and required qualified maintenance, but had a good supply of torque.
Below is a table with the main technical data of the first production truck of the Ural brand:
| Parameter | Meaning | Note |
|---|---|---|
| Engine model | Ural-353 (ZIS-120) | Carburetor, 6-cylinder |
| Power | 90 hp | At 2600 rpm |
| Load capacity | 5000 kg | Descended along the ground |
| Maximum speed | 65 km/h | Full load |
| Fuel consumption | 32 l/100 km | In a mixed cycle |
The car's transmission included a dry single-plate clutch and a 5-speed gearbox. This configuration made it possible to effectively use engine thrust on various sections of the track. It is worth noting that the braking system was hydraulic, which was a progressive solution, although it required constant monitoring of the fluid level.
When analyzing old technical specifications, always make allowances for wear and test conditions: data in data sheets were often indicated for ideal road conditions, which were rarely met in reality.
Manufacturing challenges and modernization
The launch of production did not go smoothly. The plant faced a shortage of qualified personnel and difficulties in the supply of components. The first batches of cars had a number of “childhood diseases” that were detected already during operation. Engineers had to quickly make changes to the design on the fly, sometimes stopping the conveyor to modify the equipment.
One of the main problems was the low durability of some components when working with overloads. Drivers, accustomed to working “to the limit,” often exceeded the permissible load capacity, which led to frame and axle failures. This required a series of tests and subsequent strengthening of critical structural elements in 1953-1954.
Despite the difficulties, production rates increased. Factory workers introduced production lines and improved casting technology. Modernization Electrical equipment was also affected: wire insulation was improved, which reduced the number of failures in wet weather. These efforts made it possible to reach production targets by the mid-50s.
☑️ Factors of success of the plant in the 50s
Operation and application in the national economy
Ural-355 trucks are widely used in various sectors of the economy. They were actively used for transporting building materials, grain, timber and industrial equipment. Due to their reliability, these machines became the main “hard workers” in agriculture, where they worked all year round, regardless of weather conditions.
In the logging industry, Urals were used as on-board vehicles for removing logs from cutting sites. Their cross-country ability, although inferior to future all-wheel drive models, allowed them to feel confident on hard-packed winter roads. Drivers valued the car for its ease of operation and the ability to do minor repairs in the field.
However, with increasing requirements for cross-country ability and load-carrying capacity, the two-axle design has become a limiting factor. To work in off-road conditions, more powerful vehicles with all-wheel drive were required. This predetermined the fate of the model: it became a transitional stage to the creation of the legendary three-axle Ural-375.
⚠️ Attention: The operation of rare equipment requires a special approach to fuels and lubricants; Modern oils may not be suitable in terms of viscosity characteristics for engines with clearances designed for 50s technology.
Legacy and transition to three-axis models
By the end of the 1950s, it became obvious that a two-axle truck could not fully satisfy the growing needs of the national economy in the context of the development of Siberia and the Far East. A vehicle with increased cross-country ability and greater carrying capacity was required. The engineering groundwork obtained during the production of the Ural-355 became the foundation for the development of a new family of vehicles.
Based on the Ural-355 units, an experimental three-axle truck was created, which later turned into the Ural-375. This car became a symbol of the brand and glorified the Miass plant throughout the world. However, without the experience gained during the release of the “firstborn,” the creation of such a monster would have been impossible.
Today the Ural-355 is of great historical value. The surviving copies are in museums and private collections, being a living reminder of the labor feat of the post-war years. Studying the history of this machine allows us to better understand the path of development of domestic mechanical engineering.
Ural-355 became a critical link that allowed the plant to master the full production cycle of trucks and move on to the creation of heavy off-road equipment.
Frequently asked questions (FAQ)
Have the original Ural-355 survived to this day?
Very few original copies in working condition have survived. Most of the cars were scrapped in the 60s and 70s. Some examples can be found in technical museums or among collectors of vintage cars, which have often undergone extensive restoration.
How was the Ural-353 engine different from the ZIS-120?
The main difference was improvements aimed at increasing reliability in the conditions of the Urals. The lubrication system was changed, the crankshaft was strengthened and the cooling system was improved, which allowed the engine to operate at higher loads without overheating.
Why was the production of Ural-355 curtailed?
Production was curtailed due to the plant's transition to producing more modern three-axle all-wheel drive trucks (Ural-375), which better met the requirements of the time and could operate in complete off-road conditions, where a two-axle vehicle was powerless.
Is it possible to find spare parts for the Ural-355 now?
New spare parts are not produced. Restoration of such cars is possible only through donor units from the ZIS-150/ZIL-164 or the production of custom parts in specialized workshops engaged in the restoration of retro equipment.