D65PX-16 IDLER

KOMATSU IDLER D65PX-16

Brand: KOMATSU     Type: BULLDOZER    Model: D65PX-16

IDLER/IDLER WHEEL

What is the reason for the damage of bulldozer idler?

1. The different axial degrees of the guide wheel bimetallic sleeve sliding bearing are out of tolerance, and the crawler walking will produce vibration jump and impact. Once the geometric dimension is out of tolerance, the clearance between the guide axle and the shaft sleeve will be too small or no clearance, and the lubricating oil film thickness is not enough or even no lubricating oil film.

2. The surface roughness of the idler shaft is out of tolerance. There are many metal ridges on the shaft surface, which destroys the integrity and continuity of the lubricating oil film between the shaft and the sliding bearing. During operation, a large amount of metal wear debris will be generated in the lubricating oil, which will increase the surface roughness of the shaft and bearing and worsen the lubrication state, resulting in serious wear of the guide axle and sliding bearing.

3. The original structure has defects. The lubricating oil is injected from the screw plug hole at the end of the idler shaft, and then gradually fills the whole cavity. In actual operation, if there is no special tool for oil injection, it is difficult for the lubricating oil to pass through the circuitous cavity in the idler only under the action of its own gravity, and the gas in the cavity is not discharged smoothly, so it is difficult to fill the lubricating oil. The oil filling space of the original machine cavity is too small, resulting in a serious shortage of lubricating oil.

4. The lubricating oil in the clearance between the guide axle and the shaft sleeve cannot take away the heat generated by the bearing due to the lack of oil passage, resulting in the increase of the working temperature of the bearing, the decrease of the viscosity of the lubricating oil and the decrease of the thickness of the lubricating oil film..

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