Posted 7/15/2015 22:14 (#4682107 - in reply to #4680238) Subject: RE: JD 643 and 693 corn heads, what to look for; thinking of adapting to Gleaner L3
w/c Illinois
Take a small pry bar and wiggle the top sprocket on each gathering chain. The shaft in the sprocket turns in a bronze bushing and the bushing is lubed by a spring that screws grease up the shaft. The bushings need replaced over time, and it is not a quick fix.