Introduction 1. This product is a motor and running gear reducer one. By an integrated internal gear dual displacement axial piston motor, walking reducer. 2. Motor built-in reverse valve, parking brake and gear shift device according to the level of two of its features are: gear ratio range, compact, high efficiency, high reliability, small size, smooth motion, noise low, and has multi-level security protection, long life and other advantages 4. For hydraulic crawler walking device driver.