Is this on a new machine or have the chopper knives/hammers been replaced or turned? Or is it the stationary knives that stick thru thru slotted sheet?
My experience has been with 8820 chopper knives but the chopper knife principal is basically the same for anything. If the instructions say to use a torque wrench to tighten the nuts to proper specs then that is what you should do.If they've just been turned they should have had a new bolt/bushing kit used.
We've found with the new bolt/bushing kits the outside knife bolts are too short to get all the threads of the nut onto the bolt to properly torque it and then the outside knives would fly out the back so we replace these with a slightly longer bolt and double nut it. Ofcourse this may have been remedied with newer combines. And it may be a completely different knife/hammer holder than what we've worked with.
we run 3 9860 premiums with extra fine cut choppers.bushings on knives are too brittle.deere knows about this and is trying to solve the issue.update kit for out 06 model includes washers to keep the knife from flying out
Thanks for the input! Its a 2005 model 9760STS, bolt holes on the blades look to become oblong (worn) and as mentioned above become brittle and out they go. Not a good thing if you are coming up behind the machine in a chaser bin or anything like that.