MECHANICAL APPARATUS, WORK VEHICLE, SYSTEM FOR ESTIMATING DETERIORATION STATE OF MECHANICAL PART, AND METHOD FOR ESTIMATING DETERIORATION STATE OF MECHANICAL PART

摘要

A mechanical apparatus is provided with: a housing having an internal space accommodating a mechanical part immersed in oil; a transparent spacer member disposed in an opening of the housing, a magnet supported by the spacer member; and an imaging device for imaging the internal space of the housing via the spacer member.