Hello, just purchased my first tractor yesterday. I believe it is a 59ish 1841. It has a 4 cylinder deisel, bucket and back hoe. It runs well and everything appears to work fairly well and it is overall a solid machine as far as I can tell. It is equipped with the 4 speed Trans, pto, also has 3 point system ( no lift bars are on it or anything because of the back hoe). I am thinking I should change all the fluids before I get to using it, it has sat for a long time and the only thing the previous owner did when he got it running again Was change the oil. could you guys help me out with proper lubricant selection? My main concerns are the diff and Trans and hydraulic system. I'm thinking good old 15w40 for the engine. My shop manual says m4864a for the diff and trans From what I can tell. What is a good modern alternative? Looks like m2c41 for the hydraulic system and steering? Also need a good modern alternative. I was thinking i would probably use like an 80w90 gl5 for the diff and trans and just some good old aw32 for the hydraulics But after all my reading I figured i should post here and make sure. I have a few other questions that I will post shortly, I need to snap some pics to go with them though. Thanks in advance for the help, I have been browsing the site for a few weeks and you guys seem knowledgeable and awesome.