In early 2009 Caterpillar officially announced production of 50 000 th mining truck factory in Illinois, USA. Caterpillar started production of mining trucks 50 years ago and thanks to their high quality and long service life as well as their excellent support, has become the market leader for heavy mining trucks. Designed to work in open pit mines, quarries and large construction sites, these trucks with wheel loaders and excavators CAT form high freight transport systems that deliver high performance at low operating costs. The range of mining trucks CAT consists of 10 models with payloads from 39 to 363 metric tons. CAT trucks with mechanical drive and power shift transmission, providing them with accurate, efficient and safe operation in harsh field conditions, steep slopes and high resistance path. Trucks series “G” with a payload of 55 to 90 metric tons are equipped with diesel engines CAT technology ACERT, which comply with EU emission regulations Stage IIIB and ensure efficient operation with low fuel consumption. Other technical innovations than the engine, including automatic transmission with electronically controlled clutches for smooth shifting, hydraulic brakes, wider and more comfortable cabin with ergonomic controls, choice of basket with a rubber liner, Cat Messanger new system of information and control. Model 797F with a payload of 363 metric tons is the largest truck in the world with mechanical drive.