What type of grease are you using on your tractor. My BX23S had everything greased with red grease, but I don't know what brand it was. In the past, I used molybdenum disulfide grease on everything on my old tractor when it was new, and when I ran out, I just started using what ever I had handy, on the assumption that something is better than nothing. Never had to replace any pins, u-joints, or any other moving parts. 60+ years ago, mechanics would say that grease was grease, and they were all the same. I know that times have changed, and I see some tubes of grease costing $20 or more. I needed grease for my grease gun, and I bought a couple of tubes of Valvoline tacky red grease for the tractor. I have always felt that oils were more important than grease, and never skimped on the quality of the oils I use in my engines.