Product Overview TM04 is an integrated travel hydraulic motor + planetary final drive (reduction gearbox) assembly designed for 3.5–4 ton crawler mini excavators — commonly referred to as the "travel gearbox" or "final drive." It converts hydraulic motor rotation into high-torque output through internal planetary gearing, driving the sprocket and track for machine travel. Basic Positioning Type Axial piston travel hydraulic motor + planetary final-drive reduction (integrated