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Good description! I'd like to add that you WILL need a second person during re-assembly to manipulate the axle while you trick the bull gear into going back in place. A good supply of patience and profanity may be needed also. A third person is handy for fetching tools and taking the blame when things don't go well..... Since both axles have to be done, the second side will likely go a lot easier. As Farmer Bob indicates, check those bull pinion bearings behind the brakes while you're at it. You don't have to remove the brakes to do the axle housings, but a quick removal of the brake housings and internal parts will show if those seals are leaking also. If you get into changing those seals and/or bearings in addition to the axle seals, you may need to seriously consider removing the platform and having a better view of what you're doing. That platform is a lot of work to remove because of everything that's hooked to it. It is very heavy. Lots of these old M tractors have been upgraded with the use of 560 bearings in these areas. Consult with your bearing supplier or CaseIH dealer about this. The heavier bearings will likely outlast the tractor. Two people can change out the axle seals the way Farmer Bob describes in a little over half a day, even doing it for the first time. If you have disk brakes and end up taking them apart, plan on another 1 or two hours per side for cleaning and adjusting them.
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