Hitachi excavator accessory 4406589 walking first stage planetary wheel bearing

Hitachi excavator 4406589 walking first stage planetary wheel bearing (walking motor first stage planetary wheel bearing/Final Drive Primary Planetary Bearing/walking motor planetary gear bearing) is specially designed for precise matching of walking motors of medium and large excavators such as ZX240-3, ZX330-3, ZX470-3, ZX450, etc. It is a key support bearing of the planetary gear system at the core of the walking mechanism, directly affecting walking speed control, thrust output, and mechanism stability. Made of high-strength bearing steel material, high-precision ball/roller bearings, precision retainers, and high-temperature resistant sealing rings, it is resistant to vibration, wear, pollution, and high-temperature corrosion. Perfectly solves walking mechanism failures such as weak walking, unstable walking speed, walking shaking, abnormal noise of walking motor, non rotation of walking motor, high hydraulic oil and water temperature, and weak holding of the vehicle (highly related to the interlock protection mode after low high-pressure common rail pressure).