Renault was the first French company to launch agricultural tractors.
The first number will be a tracked representative of the brand: Renault HI. The predecessor to the HI was the GP. The GP tractor, which appeared immediately after the First World War, is often called the conversion of the famous Renault FT tank. Recently I read that this is one of the widespread misconceptions, and the American Cletrac model R caterpillar served as a real prototype. It is difficult to judge how fair this version is, but something in common is visible. The GP was powered by a Renault 157 4-cylinder, water-cooled 4536 cc petrol engine. Its power was 28 hp. The gearbox had 4 direct and one reverse gears. The characteristic and recognizable hood of Renault cars of the early twentieth century is difficult to confuse with anything else. The transmission includes a cone clutch and differential. the radiator is located above the bonnet on the driver's side. In 1920, the predecessor will be replaced by the HI model. The differences from the predecessor will be wider tracks, a modified engine, which will retain the working volume, but due to the use of a new block head and a radiator of the cooling system, the power will increase to 34 hp. The gearbox of the new tractor received 3 direct gears and one reverse. In 1921, a wheeled version of the same car with the HO index will be released, for which, in addition to the main one, an engine with a volume of 3177 cm3 will be offered, producing 30 hp. In total, 610 such tractors will be produced from 1920 to 1928.
It is curious that in France these tractors were taken into account and in the event of war had to be mobilized into the army as tractors.
In general, the tractor is not very widespread due to its large mass, complexity, high fuel consumption and high cost.
The next one is Renault R3042, released after World War II. The basis for this model was the R304H tractor developed during the war. A new engine was developed for the 304 series - the Moteur 85.85 is the bore of the new 4-cylinder engine. Its stroke was 115 mm. An interesting feature of the tractor was the choice of fuel. The choice was gasoline, paraffin and alcohol. Even during the war, due to the shortage of gasoline, the engine for the 304 series was developed for different types of fuel, incl. tractors equipped with gas generators were produced. The maximum engine power, depending on the fuel used, varied within 22-30hp. The maximum speed reached 22 km / h.
The first version of the tractor, the production of which began after the liberation of France, was the 304E model launched back in 1944. Due to the shortage of copper, the tractor is practically not equipped with electrical equipment. In 1947, the 304E was replaced by the almost identical R3040. The R3040 introduces 6-volt lighting equipment. A version with a narrow track for cultivating vineyards appears. And with the R3040, the Renault tractors orange color, which has become a trademark for many years, and the 4-digit indexing of models begin.
The next year, 1948, model 3041 appears, which uses a new brass radiator. Also, over a year and a half of production, several innovations were made in the 85 engine, thanks to which it became an overhead valve, and the power increased to 35hp. Also, on later machines, they begin to install a hydraulically-raised suspension of working equipment.
In 1949, after a number of improvements, the R3042 model was put on the conveyor, which became the most massive version of the 304 series (15673 cars were produced until 1955). The basic configuration of the tractor was equipped with an electric starter, independent pedal and hand brakes, and was equipped with two power take-off shafts for attachments and stationary equipment. One was located at the back, and on the second, installed in the middle part and having 2 output ends on both sides of the hood, a pulley for a belt drive was installed. The gearbox had 4 direct and one reverse gears.
In 1951, purchased diesel 4-cylinder engines began to be installed on the same tractors: 37-horsepower PERKINS P4TA on models R7012 and R7013; 42-strong HERCULES DOOD on R7022 and R7023.
Model Renault 551 (R7451) 1972. Throughout the post-war years, the Renault concern actively absorbed and bought out various smaller enterprises. The Italian company Carraro did not escape this fate. Since 1972 Renault has been installing Carraro front axles on all of its new tractors. In parallel with this, they buy out a large block of shares in 1974, and a little earlier, in 1973, the production of Italian tractors under the Renault brand began. As a result of this collaboration, almost 80 new types of tractors have appeared: from the small 301 to the heavy 1451-4.
There is almost nothing to write about more modern machines, so only the most general characteristics. Model 551 was equipped with a 3-cylinder diesel engine with a displacement of 3.1 liters and a power of 55 hp. Tractor weight - 2675 kg. Gears - 12 forward and 3 reverse. Produced until 1980.
Now almost a modern tractor: Renault Ergos 100 H from 2004. Ergos tractors were produced in several series: 85, 90, 95, 100, 105 and 110. I was very surprised when I found almost nothing in terms of characteristics for a completely new machine. Engine power varies from 86 to 102hp. There are both agricultural and road construction options for this machine.
This is one of the last tractors produced under the Renault brand. As I already wrote, in 2008 the entire agricultural division of Renault Agriculture was taken over by the German company Claas.