Anyone that worked in BNM in the mechanical department would say that they were serviced at half the specified hours with the best oils and genuine parts. The problem was not the servicing, but the array of drivers that these machines usually had. As you say, they got zero care and often had a different driver every day. In the last few auctions, many machines went through with several parts missing - starters, pumps, lights, seats, etc. etc. When lads knew that they were not going to be worked any more, there was a free for all. I'll bet if you could get into some farm sheds in these bog areas, there's sheds of spare parts for whatever model tractor is on the farm.