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Recent content by markabasinger

Yesterday's Tractor Forums
  1. M

    John Deere 990 4WD problem

    Picture of rear coupler wear
  2. M

    John Deere 990 4WD problem

    Lifted the front of the tractor off the ground a bit and the shaft came right out (along with the 6 ball bearings on each end. I found them easily but it appears the rear coupler on the shaft is badly worn causing the coupler to hop over the bearings under load. Will need to replace the coupler...
  3. M

    John Deere 990 4WD problem

    Good advice. Let me lift the front end off the ground and see if I can give them a nudge.
  4. M

    John Deere 990 4WD problem

    Thanks Wore out-The drive shaft appears to run true. I will attempt to slide the joint on the splines but it seems hung up. It will only move about 1/8 of an inch. I thought that might be my problem. Perhaps the steel balls are worn?? Maybe not letting it slip fully into the splines in the...
  5. M

    John Deere 990 4WD problem

    Thanks for chiming in. I will attempt to slide the drive shaft back and get some clearance to drop it. I agree-JD in name only, it's a mutt made up of international parts I would guess. I have a red one also-Farmall 756. It's running right now but I've laid under it a few time also :)
  6. M

    John Deere 990 4WD problem

    Didn't see my picture in the original post so attempting to repost. <img src=https://www.yesterdaystractors.com/cvphotos/cvphoto136180.jpg
  7. M

    John Deere 990 4WD problem

    My JD 990 tractor makes a clunking, binding type noise when in 4WD. It functions fine in 2WD mode. It still works in 4WD, but has the noise so I quit running it immediately. I am trying to remove the front drive shaft to inspect where it enters the differential but my JD technical manual has...
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