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Message: <blockquote data-quote="skidsteer.ca" data-source="post: 10595" data-attributes="member: 307">BrianI did my 853 seal "in frame" just slide the pulley off the shaft and, drill a hole in the seal and pry it out.  763 might have less room though, smaller frame and all.Get yourself a steel hydraulic plug that a socket fits, not a cast iron one, when you get it out, and don't put it in too tight, I swear someone crawls in there and retorqs these and oil filters.If you use a 3/4" or so nut I would grind it down to 1/2" thick, so when your trying to get it welded to the old plug you don't have to reach too deep into the "hole" to be able to work the bead and get a good weld.Never thought of grease, but I would use that last resort. Maybe it would last good, don't know.  I would always be concerned about finishing the current project with that 'repair" in the back of my mindKen</blockquote>