BelAZ-7555 dump truck: specifications and manual

The work carried out in quarries is distinguished by its complexity and laboriousness. A huge number of exported bulk materials requires the mandatory availability of special equipment, through which the transportation of minerals and waste rock dumps is carried out. One of such large-sized cars, which by right can be called almost the largest in the world, is BelAz-7555.

General information and purpose

This quarry dump truck is used for transportation of cargoes having a loose consistency, and various mountain masses. Also BelAz-7555 is simply indispensable during the construction of complex from a technical point of view, large industrial facilities. Due to the well thought-out design, the machine has proven itself in both difficult road conditions and severe climatic zones.

Modifications

BelAz-7555, whose photo is given in this article, is produced in four variants, which are denoted by Latin letters: B, D, E, F. Each of the models has its own design features and various operating parameters.

The maximum load rating is 60 tons, which is very good for trucks. When picking up the modification of the truck, it is necessary to competently approach the calculation of all its indicators in order to achieve such advantages as:

• Long service life.
• Wide scope of use.
• Ease of maintenance.
• Optimum cost.
• Available and inexpensive spare parts and components.

And to maximally choose this massive truck, you should familiarize yourself with BelAZ-7555, the technical characteristics of which will be discussed in the next section.

Performance Indicators

All these dump trucks have common parameters in such nodes:

• The transmission is 7556-1700004 GMF (6 + 1).
• The maximum speed is 55 km / h.
• The fuel consumption is 211 g / kW * h.
• The total weight without and with auxiliary equipment is 44/104 tons.

BelAZ-7555B and 7555D are equipped with a motor type KTTA 19-C with a capacity of 522 kW and have a carrying capacity of 55 tons. In turn, BelAZ-7555E and 7555F have a motor QSK 19-C with a capacity of 559 kW and are capable of carrying 60 tons of cargo.

Motor parameters

The engines Cummins KTTA 19-C combine the following indicators:

• The total weight is 1975 kilograms.
• The limiting power is 522 kW.
• The combustion chamber has a working volume of 19,000 cm3.
• Number of working cylinders - 6 pieces.
• The arrangement of the cylinders is in a row.
• Available dual turbo.

It is worth noting that the amount of fuel consumed is very small, since the car uses a computer-aided electronic engine management system, with which, among other things, the dump truck is able to overcome even the steepest climbs and impressive obstacles on its way.

Now consider the engine Cummins QSK 19-C. Its functional parameters are as follows:

• The maximum power is 560 kW.
• The total weight is 2120 kg.
• Working cylinders (number) - 6 pieces.
• The arrangement of the working cylinders is in-line.

Even despite the fact that this engine has an impressive power, its fuel consumption is very small, which can also be explained by its balanced work controlled by the electronic system.

With the maintenance of an appropriate level of maintenance and repair, BelAza engines can last for a very long period of time, even under very extreme conditions and heavy operating conditions. Particularly worth noting: the cost of spare parts for this engine is relatively small.

Dimensions

The characteristic of BelAZ-7555 will be incomplete, if you do not specify its mass and dimensions:

• The length of the machine from the edge of the front bumper to the end of the loading platform is 8890 mm.
• The width of the truck (measured from the edges of the protectors between the right and left wheels) is 4740 mm.
• The height of the truck from the underlying surface to the top of the driver's cab is 4560 mm.

Such enormous dimensions are explained by the impressive load capacity of the truck, which can reach 60 tons (E-modification machine).

As for modification D, its length is 8890 mm, width 5080 mm, and height 4630 mm.

Trucks class B and F have a dry operating weight (without load and fuel capacity) 40500 kilograms. The biggest modification is E, which weighs about 44,100 kg.

Capacities

BelAz-7555 has several filling capacities, which is understandable given its capabilities.

• The fuel storage tank is 740 liters.
• Hydraulic tank - 230 liters.
• The amount of lubricant in the rear axle is 108 liters.
• In each cylinder of the first suspension is 15 liters, in the rear suspension the cylinders contain 15.8 liters.
• The system providing liquid cooling of the engine is 205 liters.

The indicator of the total volume of all dumper tanks is almost 1.5 tons.

Special equipment and auxiliary options

Normal operation of BelAZ-7555 is simply impossible without the presence of highly specialized technical means, among which:

• A system that provides air conditioning in the driver's cab.
• Fire-fighting system of the driver's cab.
• Engine preheating.
• Centralized and automated lubrication system.
• Indicators indicating the loading of the machine and the amount of fuel.
• Sensors that perform continuous monitoring of pressure in the wheels of the machine on-line.
• Diagnostic system that provides the ability to quickly and clearly identify the causes of any technical problems.

Description of the chassis

BelAZ-7555 has absolutely all modifications has a leading bridge, which includes:

• Conical single-stage gear.
• Differential.
• Satellites (four pieces).
• Planetary gear wheel type.

In the design of the dump truck, a cardan gear consisting of:

• Open cardan shafts.
• Needle bearings.
• Elastic couplings.
• Protective cover.

Tire machines - tubeless, pneumatic with a nominal pressure of 0.65 MPa.

The rear axle of the car has:

• Single-stage main gear.
• Conical differential.
• Planetary gear.

The front and rear axles are equipped with pneumohydraulic cylinders filled with nitrogen and oil in equal proportions.

Transmission of the tipper is hydromechanical type and consists of:

• Hydraulic transformer.
• Four-shaft transmission.
• Electronic system that protects against overloads.
• Emergency control system.

Hydrosystem

The body of the truck is tilted due to the hydraulic drive. The main working elements of the hydraulic equipment, which is responsible for overturning, are:

• Oil gear pumps.
• Hydraulic cylinders.

In general, the hydraulic system of the truck has such parameters:

• The lifting time to the top of the working platform is 15 seconds.
• The platform lowering time is 14 seconds.
• Maximum operating pressure is 17 MPa.
• Limit productivity - 342 dm.cub / min.

Features of the machine

Particular attention is paid to the driver's cabin, which fully meets European standards. The vibration in it reaches only a level of 80 dB, which allows the driver not to get tired of it, even being in the workplace quite a long period of time.

In conclusion, we note that BelAz-7555, the operating manual of which provides recommendations for adjusting the mechanisms of the machine, its systems, as well as the basic rules of service, is precisely that dump truck that combines high efficiency and low cost of repairing its components.