New generation of BELAZ-7555 dump trucks

by Apeg, October 8, 2015

BELAZ-7555I  dump truck with payload capacity of 60 tons

Nowadays OJSC “BELAZ is offering renewed series of the model BELAZ-7555, which are BELAZ-7555H and BELAZ-7555I dump trucks. These dump trucks of new generation are specified by innovative technologies in the design of its units and components.

Dump trucks of the model BELAZ-7555 are modern high-technology equipment with payload capacity of 55-60 tons which is popular among customers of manufactured products. This fact has been proved by numerous deliveries of dump trucks to more than 20 countries worldwide, as well by the positive reports about its operation given by operating companies. The first dump truck of 55 tons was manufactured in 1993. Numerous variants of the dump truck of this model was developed by specialists of our enterprise since than. Also its design was improved with regards to the operation experience of mining dump trucks.

Uniqueness of BELAZ-7555I dump truck is specified by the following new technologies:
modern engine with electric control system Liebherr D9512 A7 with power of  758 HP, which is mounted in BELAZ equipment for the first time,
automatic gear box manufactured by OJSC “BELAZ with six stages in advance and one stage in reverse allows to select the most effective traction and speed mode of the dump truck motion, simplifying the control of vehicle and ensuring safety in operation,
automatic control system for hydromechanical transmission  (ACS HMT) improves operational performance of the equipment, increases its life time and reliability  by maintaining optimal operation modes;
unified hydraulic system for steering control, braking system control and dumping mechanism provides reliability and high performance;
new cabin with enhanced comfort and improved observability equipped with the information LCD screen on the control panel, improved lining and insulating materials;
multiple disk oil cooled brakes (here in after – MDOCB) assure:
– efficiency of dump truck increases 1,3 times through the downtime decrease,   average speed increase and comfort improvement for the operator during the  dump truck motion,
– working hours for service maintenance decrease approximately by 240 hours due to approximately 8 time rise of the life time of braking friction materials. According to the experience of operation of the dump truck with MDOCB it is more appropriate to carry out scheduled replacement of braking disks and gaskets of MDOCB installed in rear axle after 300-350 thousand km of running distance.

New technologies used in the design of BELAZ-7555Н are:

modern automatic hydromechanical transmission of planetary type manufactured by OJSC “BELAZ with six stages in advance and one in reverse  which allows to select most appropriate traction and speed mode of  dump truck motion, simplifying the control of vehicle and ensuring safety in operation.

automatic control system for  electrical mechanical transmission  (ACS EMT) improves operational performance of the equipment, increases its life time and reliability by maintaining optimal operation modes;
new driving rear axle with increased life time, reduced working hours of service maintenance and repair according to the modern requirements. For this reasons was completely changed the design of the main gear, differential and planetary wheel gears (presently new driving axle is successfully passing the operational test on BELAZ-7555В dump truck at the granitic mine of RUPE “Granit, Mikashevichy, Republic of Belarus, running distance is above 130.000 km);
new double-circuit hydraulic system, unified for steering and braking systems, body hoist mechanism and cooling system of MDOCB with diagnostic system provides reliability and high performance;
new cabin with enhanced comfort and observability equipped with the information LCD screen on the control panel, improved lining and insulating materials.

The basic model of dump trucks is amended with the following options which improve operational qualities of the equipment:
• Combined fire fighting system with remote control;
• Engine start preheater;
• Automatic lubrication system;
• Heating and conditioning block;
• Load and fuel control system;
• Pressure control system in tires;
• Video viewing system;
• Alarm device when approaching to high voltage line.

Nowadays BELAZ is:
• unique experienced company with highly efficient development  system, testing and  production startup of new equipment,
• high-technology level of manufactured products,
• constant update and improvement of the manufactured products,
• introduction of research solutions to the engineering process and designing of dump equipment.

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