Travel gear (by the hydraulic motor / multi-disc brake / modular structure of the planetary reducer, valve etc.), the output torque from to 29 million, the series running gear with a compact, simple installation, oil change convenient, good sealing, low noise operation, can be applied in the installation environment under extreme conditions. 
 After hardening the surface of the gear, and after quenching and tempering and surface hardening of the internal gear, coupled with good quality control, so that the series of walking gear with excellent carrying capacity and operating reliability.