A good Spanish friend keeps his crawler tractor under a tree in the countryside ready for use just a few times each year. It is a CF274 so about 25 - 27 years old.
Came to use it and the gearbox had filled with rainwater due to a split gaiter on the gearknob and lack of proper covering against the elements. So he brought it up to near our house to work on and take advantage of my tools etc.
Strange sump plug damaged through years of scuffing rocks underneath. This was the first time it had had gearbox oil changed! I didn't have anything that would do the job despite having a set of diff/gearbox tools . Biggest torx didn't fit inside .
Today he arrived with his mate and his electric welder ( I refuse to have one ) . First job rig up a huge long extension cable. He brought 50 metres of homemade from 21 year old cable. That was faulty ( damaged core half way along). His mate was testing it with a small angle grinder extended with not one but two lengths of what I would call two core unsheathed lighting cable. masking tape joints!!! No welding mask, no goggles (till I lent some) for angle grinding. Mornings work failed to budge it.
Just loaded it onto a trailer and it has gone to a proper garage to be sorted 30 miles away. What a load of hassle as a result of poor maintenance.