Posted by Rootsy on May 03, 2011 at 09:37:43 from (24.247.111.162):
In Reply to: IH 400 planter posted by gene bender on May 03, 2011 at 08:47:24:
I grew up with a 6 row 400 Cyclo and currently own a 4 rw. The biggest real issue is getting the drum pockets to fill with a single seed consistently. This is determined by the seed shape, size and weight obviously but also the brush and the drum pocket geometry. Too little air pressure and you may get skips... Too much and you double or triple. Setting the brush to clear the pocket of excess seed is a crap shoot as you cannot see inside the drum to see what is occurring. Seed tubes need to be equal length for seed travel time or spacing becomes an issue... Very simplistic in terms of what is important for adjustment but as with anything else it is a balancing act.
The biggest difference between the 400 and later 800 / 900 planters is the row unit design. The 400 uses the old plate planter trailing arm design where as the 800 / 900 use the 4 link design as is still used today. The trailing arm design is limited in it's ability to maintain consistent seed depth on changing terrain elevation. It also doesn't have sufficient down pressure in soil that isn't worked and loose. No-tilling with a 400 is nearly impossible and the frame isn't rigid enough to really do it any way.
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