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Case Disruptors

Installing Case 88 Series Disruptors

Step-By-Step Instructions

1. First remove your key-stock grates from your machine and place them on the floor on the left side of the combine.

2. Number them #1 Front grate #2 Middle grate, & #3 Rear grate.

3. Draw an imaginary line from the left front (of #1 front grate) to right rear of #3 rear grate), and place 6 disrupter lugs, 2 in

each grate, on that imaginary line.

4. Then make another imaginary line 12 inches or to the middle of machine on the same diagonal as the 6 lugs you have installed, and place the remaining lugs on that line with 2 in the front grate and 1 in the middle. You now have 4 lugs in the front grate, 3 in the middle, and 2 in the rear.

Same Directions for 40-60- 66-80- 88 Case-IH Combines.


  • “Do not use an air wrench”(torque 35ft #s)
  • You must use the scallop bar on all standard rotors
  • You must use rice bars on all specialty & AFX rotors

About Estes Concaves

Don Estes, as an agricultural equipment welder by trade invented and patented the Disrupter for Case IH and John Deere rotary combines in 1995. Since, he has developed and patented the class-leading RPR Concave System that improves capacity, eliminates rotor loss and thrashes all crops with one concave system.

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