A flail attachment to excavator ETC-208 for grubbing

This article formulates the prerequisites used to select a base machine. The authors determine the requirements to be met by a machine with an interchangeable working body for grubbing in Siberian conditions. The article presents the research results of the working body performance attached to a machine. The tests were performed in production conditions at the facilities of the enterprise «Krasnoyarskvodstroy». The machine was taken to Bolshemurtinskiy district of Krasnoyarsk region to the reclamation object with large stumps. The purposes of these tests were to determine the expediency of using the excavator ETC-208 as a base for the stump grubbing, to determine the technical capabilities of the stump grinder in real operating conditions, to familiarize the machine operators with the new method and modernized machine for stump removal, to identify the need for such machines in the association «Krasnoyarskvodstroy». In contrast to the mock-up model, the new working body was equipped with a more reliable and easily replaceable fastening of cutters. After comprehensive testing at the production site to specify a number of parameters including cutting speed, this machine was put into operation. The advanced third sample of the working body ETC-208 was tested. It worked at the cutting chain speed from 1.5 to 2.5 m/sec, which immediately increased the productivity of machines by 1.5 times. The results of research showed the correctness of the chosen direction. It was found that the modernized machine worked quietly in the process of stump cutting. At the same time, the removal of a stump with a diameter of more than 0.9 m was made in two passes of the working body to a depth of 0.5—0.6 m. The length dimensions of shavings and chips did not exceed 0.2—0.3 m.