The Zahn series of trenchers from Ditch Witch consists of three power units and a set of compatible front ends. The Zahn R300 power unit includes a Kohler gas engine, operator’s console and articulation joint that enables the front end to perform like a dedicated unit. The two-wheel-drive R300 powers two types of front-end trenchers, while its four-wheel-drive InterChange counterpart accepts up to seven types of front ends: trencher, plow, dumper, tiller, backhoe, stump grinder and tool carrier that can drive more than 40 quick change attachments.