On my third year with this combine and haven’t had this problem before. I changed and leveled the the concaves this year. Everything appeared normal with the number on the corner post changing correctly as the concave moved. I go to the field and suddenly the concave number has changed on the corner post.?? I can move the concave and number changes but can’t get to 1. I assumed sensor was bad and changed it out w a new JD one. Zeroed it out and worked fine a couple days and now it’s goofy again the concave is not actually moving just the number on the corner post. Any ideas of what is wrong?
Posted 10/9/2024 06:07 (#10920034 - in reply to #10919948) Subject: RE: JD 9660 STS concave indicator
West Central Indiana
As far as the number won't get to zero, I'd ask did you do a calibration after leveling the concaves. As for the concave not moving now makes me wonder if binding somehow. If you think it's the movement motor, I do know the concave and fan are the same motor. Years ago, when we had a 9660, we changed them to see if the problem followed when we were having an issue.
Posted 10/9/2024 06:41 (#10920074 - in reply to #10920043) Subject: RE: JD 9660 STS concave indicator
Trempealeau County WI
The concave moves as it should. I’ve had it set on 5 for running beans and then the next day it’ll be on 34. The concave hasn’t physically moved. The corner post number isn’t jumping around while combining I have to rezero the corner post. I think maybe I’m losing memory in the corner post at startup if that’s possible?
Posted 10/9/2024 18:53 (#10920685 - in reply to #10919948) Subject: RE: JD 9660 STS concave indicator
fredericksburg, va
I had a similar prob. I have a late (bullet rotar) model. not sure if they are all the same. But I have an actu ater that turn a half gear that runs on a worm gear. One of the teeth on the gear broke off, Thought i could fix it, turns out its aluminium
Posted 10/9/2024 22:09 (#10921005 - in reply to #10919948) Subject: RE: JD 9660 STS concave indicator **Update**
Trempealeau County WI
So today was the oh s***moment! I was looking at the pendulum we’ll call that’s turned from the actuator screw. Well that was bottomed out so I assumed the concave was closed all the way. Nope!! There’s a double roll pin that attaches the pendulum to the pipe shaft that moves the concave. Well that double roll pin was sheared so the concave was pretty much wide open. So the sensor wasn’t bad or the one I changed out. But what I did find when working on it was the actuator was also out of adjustment (slipping)so at the right position the concave was free to open up by itself. What a great day.. Thanks for the responses
JD 9660 STS concave indicator
