Posted by MFPoor on December 03, 2012 at 03:20:08 from (72.4.0.230):
In Reply to: Outside disc tract posted by maxwell99 on December 02, 2012 at 19:07:34:
Most 3-point disc's I've seen were put together wrong for using them. The rear gangs need to be moved outward somewhat. They also need to be set one or two positions less aggressively than the front gangs. Rear gangs are running in soil that has already been loosened by front gangs, so that soil is easier to move. Hence, rear gang doesn't need to be as aggressive to move same amount of dirt. Don't shorten top link much, or you'll lose the effects of the rear gangs. Disc needs to run LEVEL front to rear for the most part, with SLIGHT adjustments as needed to fine tune. I've got an 8-1/2' Massey Ferguson #25 disc that does an incredibly fine job of working and leveling a seed bed. I use it when building waterways and filter strips. I use a slightly worn down disc blade on the outside of the rear gangs. That takes care of the "dead furrow" effect. As mentioned, move rear gangs outward somewhat. That will lessen the center ridging where rear gangs throw too much dirt in a pile if rear gangs are cutting. I prefer rear gangs to be about one disc spacing wider than front gangs. Also, play with ground speed to tune results. A well adjusted disc often doesn't need a drag behind it to leave a level, well worked seed bed.
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