I replaced the gear oil in my bandsaw because I'd read horror stories about folks finding grit in the box and/or mangled gears.? I'd used my band saw as-is for about 7 years up to that point.
I didn't find any grit and the gears looked pristine.? But since I had already bought replacement gear oil, I went ahead and removed the old gear oil, cleaned up the interior of the box and put the new gear oil in there.
I could have saved my money and time by not doing all that, but you never know.? I also now have a lifetime supply of gear oil.....
