Of course, in that case, if the owner has the ability to tightly enough upload your own fleet of excavators at the level of 3,000 machine-hours per year, or even higher. Linux spoke with conviction. An effective technique is needed, where it earns money. If the vehicle is idle, then it is better cheap. John Blondel pursues this goal as well. In the manufacture of critical parts Caterpillar widely used castings. Boom and stick Caterpillar excavators have box-like structure with rigid internal walls of the steel plates of thickness 10 … 12 mm.

Basis swivel are massive cast elements. After welding, the boom and stick are annealed in a furnace to remove residual stresses. This design can withstand the work with a heavier bucket. No less important element – the turntable support. In Caterpillar the knot piece, it is made by milling of cast billets. It is more expensive, but it achieved substantially higher strength of the turntable, a heavy backhoe Caterpillar.

Installed it on more expensive and reliable roller bearings, while less heavy superstructure of many models of excavators is sufficient to use less durable ball bearings. Caterpillar undercarriage frame is made of thicker steel plates, with the hydraulic hoses and drive rotary mechanism Caterpillar are protected from damage. Different weight load-bearing structures requires the use of different hydraulic systems. When operating an excavator to Hydraulic power shall be distributed between digging and turning mechanisms. Lighter excavators often eliminates the need for a simple design of hydraulic system, which has only two options for distribution power with manual switching. As a result, when digging in the bucket served 91 …