Bearings are what enable the gears to rotate easily. They are typically built from bronze or brass, they usually in shape into races (or grooves) in the gearbox housing. Contaminants can enter your gearbox oil through vents or even the fill tube through examining/filling. Usually, on the other hand, contaminants https://troysafjn.blog-ezine.com/34230797/the-2-minute-rule-for-filter-gearbox