MAZ-503 - the legend of the Soviet automobile industry

Equipment of the Soviet production even now surprised many for its reliability, power and durability. Among the most interesting representatives of the automotive industry of the USSR is to provide a MAZ-503.

Released on light in 1965 at the Minsk plant, it is still used to transport soil, rock and other heavy materials.

Grandparent

A New model of large equipment was developed based on modern and progressive at the time of the truck MAZ-500. It was a dump truck with an 11.2-liter diesel engine producing 180 horsepower. For the transport of goods, the standard model was equipped with wooden rails.

Maximum load was 7.5 thousand kg. model MAZ-500 different types of boards:

• MAZ-500V in its design had a metal platform that had a positive effect on the transport opportunities;
• MAZ-500G had an elongated body, which allowed transport of materials of great length.

Subsequently, these two major modifications have been replaced by new representatives of the heavy equipment – MAZ-503 (dump truck), MAZ-504 (truck tractor) and MAZ-509, designed for the transport of wood materials. Consider the first option more.

MAZ-503: model description

Soviet scientists did not invent something entirely new, so the truck in the first years of issue does not differ from its "father." Significant innovations were introduced in the design in 1970.

That since the base vehicle is of riveted stamped parts and sturdy frame. Suspension of the truck rests on 4 semi-elliptic leaf springs, positioned longitudinally to the frame. This, combined with hydraulic telescopic shock absorbers gave the truck MAZ-503 carrying capacity and good permeability.

The Car was comfortable for long trips. The cabin was a all-metal welded construction cabover layout. She was equipped with a sleeper and in addition to the driver to fit two more passengers. To operate the machine helped the steering.

For transportation, the model is equipped with a universal metal welded platform, which tailgate is automatically opened and closed on hinges. Actuator-hydraulic tipping platform, a built-in valve and shook it to ensure complete unloading.

Specifications

Thanks to its design MAZ-503 features impressive technical specifications:

• Maximum capacity – 8 tons;
• Curb weight – 7520 kg.
• Maximum speed – 75 km/h;
• Fuel consumption – 22 liters per 100 km;
• Maximum torque – 1503 turnover/minute;
• Dimensions & ndash; 5785х2500х2650 mm;
• Turning radius – 15 m;
• Ground clearance (clearance) – 29.5 cm

Due to the relatively large size and turning radius to call the car maneuverable is impossible.It is used mainly in quarries, open type, large construction sites and industrial enterprises.

Engine and transmission

Its cross-country ability and load capacity of dump truck MAZ-503 is obliged powerful diesel engine YMZ-236. The power plant is composed of 6 cylinders arranged in a V-shaped manner. The working volume is 11.15 liters, what is the maximum power level of 180 horsepower.

The cooling System is liquid, forced circulation of antifreeze and a thermostatic device. The last device was intended for the creation of the optimal temperature, regardless of weather conditions.

A Feature of the installation is a complex system of purification of fuel. Before getting into the combustion chamber, diesel was subjected to coarse and fine cleaning. For this purpose, the fuel supply system was built two filters – element for cotton roving for primary processing and filter of the wood flour on pulveroboletus the bundle.

This is the same time increased the durability of the unit and allowed the use of fuel of low quality. A similar system was used in the engine oil system of mixed type.

Transmission of the car MAZ-503 features a mechanical 5-speed gearbox with synchronizers on all gears except first. Double disc clutch, dry type clutch has proved from a positive side.

Modernthe world

In the market of large equipment will no longer meet a representative of the dump trucks. They were relevant and popular before 1980, but was then supplanted by the more progressive trucks, created on the basis of MAZ-5335.

But extant copies of the Soviet edition can be actively used at medium construction sites, in agriculture and in some industrial areas. And every year their number is becoming less.

Soon MAZ-503 (a photo of which can be seen in this article) will be just a memory. Those who are interested in Soviet industry, can find large-scale (1:43) model of the plant in Kostroma.