If we think that heavy equipment are used only by the construction or the mining industries then we are only partially correct with our thoughts. There is another sector which is presumably larger than the both the sectors which also uses number one quality heavy equipment and accessories and this is the military. The US military uses various types of heavy equipment for its different uses and they give the order of its requirements to some top notch companies. The requirement is given to the heavy equipment manufacturing companies and they in return give the quotation to the military officials. Once they get the clearance from the higher officials, the procurement process starts off.
The reason why military needs advanced heavy equipment is that they always get involved in activities that can’t be done without the use of sophisticated machines. Machines that some construction companies have probably never heard or have seen are procured by the military for doing everything that a logical mind can think of. They use bulldozers, excavators, cranes, loaders, crawlers etc. and they train their men for the work. They at times also recruit operators from outside but for work that is done in highly confidential places, they prefer to put their men at work. Therefore, they also provide training of operating heavy equipment to the men in uniform so that they can curtail the use of civilian operators in highly confidential zones.
The heavy equipment used by the military may not be similar to the ones used by civilians. They are more sophisticated and technologically advanced and have the potential to do the work at a comparatively lesser time than the machines used by big construction houses. You may have witnessed some companies using machines that seemed to have served the military. Well, it all works this way. Once the heavy equipment gets older or outdated and the engineers in the military feel that they no longer need their services, it will auctioned at dirt cheap price to the civilians. These heavy equipment still have their worth in sectors other than military and therefore you will get to see large number of potential buyers interested to buy such machines.
Other than that the quality of metal used in such machines is outstanding and hence everybody knows that they will end up buying something worthy at a lesser price. The US military not only used heavy equipment produced by American heavy equipment manufacturing companies. They do not mind going for machines that are produced by French, German, Canadian or Australian companies. They primarily need quality to be number one and second the machine should deliver by consuming less time.
There is not set model of a machine. They may produce a dozer and make it look like something else. It may not look like a dozer that we all know. It may not necessarily be deceptive but the model that is used for military purpose is quite unique but will be highly reliable and efficient.