YD-22III Auto hydraulic tamping machine is an updated product based on the experience of domestic and foreign users on the tamping machine , using new materials and new technologies. This machine is suitable for the tamping operation after the large-scale and middle-repair cleaning operations of different types of rails and concrete sleeper lines ; it is also suitable for the tamping operation of the ballast on the newly-built line . The automatic hydraulic running function is added which can realize non-human Push forward or backward . The machine has superior performance , reasonable structure safety and reliability , and high operating efficiency , which fully meetsthe needs of railway ballast tamping operations PRODUCT SPECIFICATIONS Model YD-22III Type Automatic Hydraulic Rail Tamping Machine Material Stainless Steel Dimensions (L x W x H) (mm) 2440*1860*2050mm Engine Honda GX390 four-stroke petrol engine9.5kw Power 9.5kw RPM 3600r / m Hydraulic system pressure 5~6MPa Vibrating frequency 66.7Hz Exciting force 22KN Clamping force 6.5KN*2 Inserting depth:110mm +10mm Production efficiency 260 sleepers/ hour Weight 1275kg