The ZE135GF is driven by a Cummins QSF3.8t3TC115 engine rated at 86 kW at 2200 rpm, with a displacement of 3.8 L. This robust powertrain supports challenging forestry terrain, demonstrated by its strong drawbar pull of 156 kN and a superior 70% gradeability, ensuring reliable performance on slopes and uneven environments.

The excavator uses two variable-displacement piston pumps delivering a maximum flow of 2 × 130 L/min. Its hydraulic settings are optimized for demanding forestry operations, with a working circuit pressure of 34.3 MPa and a supercharging pressure of 37 MPa, providing responsive and powerful operation for the boom, arm, and grapple functions.

As a true “Forest Edition” machine, it comes standard with a high-capacity grapple designed for efficient log handling. The grapple offers a maximum opening of 1865 mm, a minimum grasp diameter of 100 mm, and works with a 4260 mm boom and 2360 mm arm, enabling precise gripping, lifting, and sorting of timber in various forestry applications.