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| The Wirtgen Model 3700 SM Surface Miner is designed to cut rock with a mechanically driven cutting drum and two-part loading conveyor. Its frame is of rigid, welded honeycomb design with integrated tanks for diesel fuel and water. The four crawler tracks are free-floating and connected to supporting arms which are linked to the frame via a moving parallelogram made up of two strut constructions in each case. The tracks are fitted with double grouser track shoes. Cutting depth control is adjusted via hydraulic cylinders, while the rear crawler suspensions are controlled via an automatic cutting depth control unit. The conveyor system is composed of a wide primary belt which picks up the cut and reduced material at the cutting drum, and a loading conveyor to discharge the material into haul trucks. The loading conveyor can be adjusted in height and slewed to either side. The conveyor speed is variable.
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