Overload of worm/brass gear and/or wrong lubricant
many thanks for that. The helical gear shows signs of advanced wear also. Is this related to the loading and lubricant problem?
Sorry, not the expert on gears, based on the images you are showing....the lubrication was present and everything is nice and clean, without seeing the worn areas very closely....I would assume there was not EP additive (extreme pressure) in the oil or the gear was overloaded