2024 JCB, 35Z-1 Excavators, Introducing the 35Z-1 zero tailswing mini excavator. The New Generation 3.5T compact excavators. The 35Z-1 is one of the T4F machines with no need for electronic control, aftertreatment or EGR. It has zero tailswing for easy and safe manoeuvrability, especially in confined spaces and 100% steel bodywork.