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G.L. That Jet3 is and Industrial, isn't it? I wonder if industrial tractors used a different axle/housing setup than agricultural Jet3's. Since you're looking at it and I'm not: here goes- First, which way is the lip going on the old seal?The point of the lip should point to the side where the fluid is. you're probably going to have to try to figure out how to hook something over the face of the sheetmetal part of the seal that you can drive against to pop it out of the housing. I have an old screwdriver blade about 12" long, sharpened, with no handle that I sometimes use. I just tap it in the gap between the seal and housing at an angle toward the way I want the seal to go. In other words, I lay the housing across an open vise, stick the screwdriver in the housing from the top, side and try to hook the seal sheetmetal and bend it down, going the way it needs to come out. After I bend the sheetmetal down some, I switch to a flat bottom punch. most times I have to work at more than one point around the seal. I guess this could bust the housing, so far, the seal has always moved first. Just about everything I have ever worked on I could replace the seal without removing the bearing. But since I'm not looking at yours, and you are, I can't say either way. Your new seal will likely have only a sheetmetal face on the outer side-away from the fluid. remember, the lip always goes toward the fluid. You will have to find some kind of ring that'll drive against the outer edge of the seal. Be sure to pack the between the seal lip and the outside edge of the sheetmetal part of the seal. This will keep the spring around the seal lip from jumping out while you drive the seal into place in the housing. An even better idea: show your seal/housing combo to someone who works such stuff and get their opinion.
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