I found instructions on the internet indicating this was a relatively easy fix and all I needed to do was take it apart remove the old grease which was separating into an oil and grease mix and repack with new grease. The instructions were easy to follow taking apart the mixer cleaning it out and putting in the new grease. Putting it back together following the directions was also easy until..... I tried to replace the planetary gear on the shaft. As I pressed the gear on the shaft the shaft itself slid upward to the point that when the gear was seated I could not replace the pin which holds the gear on the shaft because the hole in the shaft was to far above the hole in the gear to even align it. I took it apart again removed the grease checked that everything was aligned, repacked and tried again with the same result. On my third attempt I was having the same problem but I tried lightly and rapidly tapping on the bottom of the planetary gear and that technique helped the gear slide up the shaft to the point that I could use my pin driving tool to align the holes and place the pin in place. Bottom line, after 2 hours of battle the mixer works well and no longer leaks oil