Combines R62 rotary screen

Also a 94 Cummins powered R62. Cereal straw is also causing us some rotary screen problems at times. One solution which we have heard of but not yet tried is to cut out a large section of tin over the Rotary screen area. This would change the airflow around and into the screen and would allow relatively clean air from above the hood to be drawn into the screen. To neaten things up, some expanded metal could be used to cover the hole. For us, Rolf just leaves the tin cover over the repeats elevator off and this seems to make a difference.

We've had the same problem on strong wind days. What seemed to help us the most was to work in lands so the rotary screen ran next to the harvested crop. Unharvested corn next to the screen acts like a wall and prevents leaves and shucks from blowing away and thus end up getting sucked into screen.

First adjust the adjustable tins inside screen as close as posible to screen. Slot them further if needed. Next extend the front stripper on outside of screen down about a foot and use rubber apron that can be cut to fit neatly when screen box is closed. Air cooled machines had batterys there that helps prevent material from going back around screen. Newer machines have this stripper lengthened. Now install apron under radiator to direct air that is coming from engine compartment down. This apron only needs to be about 6" by length of radiator box. Now extend rear stripper with rubber apron to about same length as front one. Keep about one inch clearance from rear stripper to rotary screen. I believe rear stripper was also lengthened on newer machines. This all will cause material that is thrown off at bottom to get closer to the ground and not keep circulating around the screen. This all looks factory if done with 1_4" belting. lets you run in a absolute chaff storm without worries of screen pluging then slowing up then stalling then quick overheat. Good luck

Dan is right of course and I just assumed that you would have previously done all of items that Dan suggested. Getting the strippers inside of the basket close to the rotary screen can be tricky. Rolf took the screen off by undoing the four bolts in the centre, Then each stripper plate was pulled right out and the bolts tightened until a gentle but firm push was needed to move them inwards. The rotary screen was bolted firmly back on, pushing the stripper plates back in. A very light hammer and a pin punch which fitted through the holes in the rotary screen and each stripper plate was gently tapped inwards until all of the stripper plates just cleared the rotating screen. The rotary screen was removed and the stripper plate bolts tightened and the rotary screen was reinstalled. That was about 10 or more years ago and we have never had to adjust the stripper plates since and they are still run very close to the rotary screen. On harvesting directions; On advice from an old farmer, we now harvest back and forth with the wind blowing the dust and chaff away from the crop if possible. We find, as we were told, that there is a very large reduction in the dustiness of the harvesting operation as the dust and chaff have not drifted across from the previous pass onto the soon to be harvested crop in the next pass. This is in small grains.

I think the problem with corn harvest and the screen really has to do with the husks or leaves coming around the back side and jamming in the pocket formed by the back scraper, thus stopping rotation. We've thought about rebuilding the back scraper to eliminate that pinch point, but haven't played with that as of yet. The chaff (smaller stuff) always seems to clear itself quite well.

I think your absolutely right about corn and leaves plugging rear stripper. The 1" clearance should allow this material to pass as long as it isn't overloaded. Adjusting the inside strippers will create more of a dead air area so material will sling off and installing belting will stop the repeating of the same material going around and around. You can even easily create more of a dead area on the bottom. I used pieces of cleaning fan blade on front and back of bottom inside panel. I laid them over the edge to just clear rotary screen when turned over and then spot welded in. Also the area next to outside bearing can be duct taped to prevent vacuum from inside screen area from reaching dead air area on vertical side of screen. There is a service bulliton that points out some of this stuff and provide some P_Ns. It is also in '99 give or take a year school material. AGCO SISU powered machines really have inside and outside strippers set up nice and are working on umbrella seal that replaced saw tooth blades. I'm thinking they about have that.