Combines R 72 Rotor Drive Modifications

Ramrod, We used to run into the same limitations in soybeans, but we raised seed soybeans so any rotor speeds over 450 caused splits. We had to learn how to convey tough green stemmed material at lower rotor speeds,when we learned this our power consumpion dropped and the rumbling ceased.Install the extended helicials and cylinder bars.We had to blow a P3 cage apart where the cylinder bars ends and the paddles start,we were slow learners.Stop your machine after you've been pushing it and lay your hand on this area,some with a really strong 72 have turned their cages blue.Remove reverse bars and replace with half height or very worn foward bars.Make the changes you'll swear you just added another 100hp.Seperateing grate upgrades help too.local has a 72 just about totaly setup,power is just not an issue.Feeding,header drive belts and keeping the crop away are. Good luck!Hyper

Hyper With the Hyper upgrades (specifically replacement of

Gamaman, I agree with you about the power_throughput advantages of no reverse bars. last R-72 I had I removed all and it was a sweet machine. This '97 has the 3_4" spaced bars, and dealer cautioned about removing them all - said material would go across seperator so fast we would send some grain out with the straw. Current configuration I have is 2 reverse bars, one in the third section, and one in the fourth, and have very little losses. If I remove them, what number of "worn_lowered" bars should be installed, and at what locationsIJ Also exactly how much lower should they be. I do have loewen's extended cyl. bars, and I will be extending the helicals, left and right. On another note, we use return to cylinder option for soybeans - can't imagine Gleaner EVER selling a machine for soybeans without that option. All advise appreciated! Thanks in advance.

We also use 2 reverse bars mostly to help rotor loss in corn, and we have them in the same location as you, but we installed reverse bars that were worn half down and set the seperator grate on 7, and then we played around some with disrupter knives in the seperator but I haven't got enough hours on them to know if they help for sure or not. This configuration lowered the rotor loss in corn but we are still trying to do better, all forward worked fine for us in soybeans but its the corn where we have trouble. This year we are going to give the sunnybrook rotor a try with the staggered bar design. It will be interesting to see how an all enclosed rotor with the staggered bars will help the seperation in corn and soybeans. We are going to start with all forward bars with this setup.

dibber, Would you or someone else fill me in on the "sunnybrook rotor". New to me. Is there a website_ a company, etc.IJ A whole replacement rotor sounds very spendy.

Go to www.sunnybrookwelding.com and click on what is new for 2001 to see a picture of the new rotor. I put one in an R62 a year ago and it has done very well for me. You will absoulutely love the fact that no dust can build up on the bars which eliminates vibration.

Gamaman, You are right,best approved height difference would be 3_4 inch. Just trying to get as many as possible to taste the difference.HyperII has after market low bars at 319-698-4005.By extending the helicials and cylinder bars(four of the bars all the way) you'll pickup that last 20hp.Still like the F concave rasps installed on the front of the seperateing grate.Takes two to go full width.Running no wedge on corn or beans on the concave also helps.Use a wedge if trouble threshing or rotor loss in beans.We run corn screens(5_8 round hole staggered) in some of our machines,cuts down on return and small cobbs.Small shoe screens max out @ 2500bph.Good luck with your hi-prrr formance ! Hyper

Hyper To achieve the ideal 3_4" difference between the

Gamaman, First we only shim the cylinder bars up in the P1(5's,6's7's and early 60's)application,we use a flat bar to raise everyother bar back up to stock height.On the P3(late 60's,52,62,72's) application we only lower height unless in a wheat application some of the guys have shimmed up the high bars a bit.The stock height(gap) is good for the hi bars in corn and beans.Tightening the gap between the hi bars and the helicials could use addional power to breakup cobbs.Our low bars are wide spaced very short toothed foward bars.By dropping bar height we add room,(many whole cobbs and less shoe load)slow material but yet hold it out against the cage.(unlike no bars)The low foward bars take less power than the hi foward but yet slow flow,sorta like the reverse bars but better.Hope this helpsIJ Hyper

Ramrod I'm just starting to "Hyperize" an R62. I plan to remove all the reverse bars and as recommended make every other row in the separator section lo or worn bars. If I have time before harvest, I also plan to reposition every other crossbar in the separator grate. Have a safe harvest. Gamaman