I have a John Deere F935 front mower that the crank shaft appears to be leaking.Has anyone ever changed out one of these crank shaft seals?
Making sure everything is clean is the most important part, engine flange & crankshaft, no nicks, dings, rust, etc. You can use fine grit sand paper to clean & dress up rough areas. Use a small drill bit 1/16th or 3/32nds and drill 2 holes opposite each other, drill just through outer face of oil seal, and install 2 sheet metal screws with large heads, if you have a slide hammer tool removing seal will be easy, if not vise grips, pry bar, etc. Before installing new oil seal, apply a thin coat of engine oil on crankshaft and a thin bead of clear automotive silicone to outside edge of oil seal, gently install oil seal over crankshaft, line up oil seal in cavity & use a deep well socket, pipe, etc. that is of the same diameter as seal and tap in with ball peen hammer.