Reid, the 6620 will handle 6 rows of corn just fine. The main reason many had so-called limited chaffer capacity was because of overloading the clean grain elevator which was in turn caused by the fountain auger in the tank not carrying the corn away from the elevator fast enough. This is probably the most important auger in the whole combine. You want to keep this auger in the best shape you can. You want to look inside the top elevator boot to see the condition of this auger THERE, not at the outlet of the auger. This auger can be increased in capacity by installing a double set of flighting on the bottom foot or so. The 7720's added this later but I don't believe the 6620's ever did. In corn you will want the chaffer open quite a ways and then run LOTS of air in corn. With everything on the "downwind" side of the chaffer in good condition you should have no problems in high yielding corn. I've done 200 bushel plus corn at over 4 mph with four rows on a 4400 many a time and saved it. I'm not saying you can "speed" with a 6620 but with proper adjustment they will take corn faster than 2 mph with 6 rows. Mike
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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