To build a trencher i used a 420cc 15hp petrol engine. I connected a two-section hydraulic pump 22cm3/8cm3 to the engine, the pump section with a capacity of 22cm3 connected to a hydraulic motor driving the digging chain and soil removal augers, I connected the section with a capacity of 8cm3 to the excavator drive and the hydraulic cylinder. To set the speed of the excavator drive and the speed of the hydraulic cylinder, I used an oil flow regulator, Thanks to this, I can smoothly adjust the driving speed and the speed of lowering the arm when digging in the ground. The maximum digging depth is 105cm/41inch.
I made the chain mechanism in the previous video ,