Bearings are what allow the gears to rotate efficiently. They are generally built from bronze or brass, they usually match into races (or grooves) within the gearbox housing. Contaminants can enter your gearbox oil by way of vents or maybe the fill tube during examining/filling. Usually, nevertheless, contaminants are the https://filtergearbox48147.laowaiblog.com/33084849/little-known-facts-about-filter-gearbox