Combines R72 thresher wear

you have the problem well understood. By extending the heilical ( we really like the idea of the extended heilical at least over the thresher section ) over the triangle insert you can find in the TIPS then UPGRADES section and the elimination of the crop divider you will lessen the wear in this area. A double pass of some crop is unavoidable and does serve a purpose of making sure everything is threshed.

I tried the extended third helical and was very unhappy with the

I won't let a machine leave the shop without the helical extention. It will decrease wear to left side of concave and the related cylinder bars. I like the hump on door for I feel it give a better feed to cylinder by helping the crop make a nice transition out of feed chain to the cylinder. Also I believe it helps the door respond to a rock much better.

You will have to see why the extention made for your machine is restricting the flow. It should not be protruding into feed area enough to give you any problem at all. We used to pop trap doors all the time with the crop that the third helical would drop back down into that area. Only the nastiest slug will pop doors open anymore. I think you should get together with whoever installed it to see what might of went wrong for you will be much better off with it installed. Do you have a rock sump or rock bar on door or do you have hump bolted to doorIJ

I have the bar on the door Dan. I installed the helical bar myself.

I have a pile of them rock bars for door that I removed. I didn't like the way they disturbed flow into cylinder. Maybe the combo of the bar on door and the helical filler won't work together. I installed rock door humps on the machines that had the bar for rocks. I also installed lots of humps just to improve feed to cylinder. I mount helical to a triangle shaped plate that I bend to match contour of cage and then I cut away crop flow director just enough so helical will clear it. I weld plate to flow director on the bottom. I bolt helical to plate and drill one hole in cage just beyond present helical. Some weld helical to plate to prevent any nuts on under side of plate. If you bolt helical to plate cut the bolts off flush with nut to help prevent feed chain from catching if it does try jump a cog. Some guys have tried doing corn without rear feed stripper and then chain is likely to jump a cog sooner or later and then it can catch nuts. I think if you followed pattern of present helical you won't have helical extention down into normal straw flow area. let us know how you get along.