Hitachi excavator accessory 3085780 walking motor drive shaft

3085780 is the core transmission component of the Hitachi excavator walking motor - the drive shaft (Shaft). It is installed inside the walking motor, with one end connected to the rotor (plunger component) of the hydraulic motor, and the other end transmitting power to the planetary reduction mechanism through a spline or gear structure, ultimately driving the track sprocket to achieve complete machine walking. Main functions: 1. Reliable transmission of the rotational torque generated by the hydraulic motor to the reduction mechanism. 2. Enduring high torque and impact loads during the walking process. 3. Ensuring smooth operation and high transmission efficiency of the walking motor. Common damage causes and fault manifestations: 1. Spline wear and slippage, leading to weak walking or abnormal noise. 2. Neck wear, causing loose bearing fit, oil leakage. 3. Bending or fracture, causing the walking motor to not work properly. 4. Surface strain and pitting, affecting sealing and bearing life