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860 Diesel TA

B

Bob21 Martin

Member
That should be 806 in the title.

I've had my 806 for about 28 years. When I bought it out of northern Iowa everything was supposed to work on it along with a good TA.

Well the low side didn't hold like it should, but we never had hard work to do with it, and I was busy with other things and never did anything about it. The high side was good so we lived with it, but the low side always slipped.

Just recently I left the tractor parked for a couple of weeks with the lever on the low side, although I don't know why, I never used it.

A couple of days ago I started discing some weeds and after about an hour of work I noticed I had it on low side and it wasn't slipping at all, which surprised me. I shifted back and forth high to low and it worked perfectly. Trying to figure out why it would do that.

As always appreciate the help - Bob
 
Mostly just luck . The low side is a sprag style overrunning clutch. Any over running clutch is just a wedging of rollers or balls or in this case,(you could call them double ended dogs). When it is over running in direct drive, the dogs are merely allowing the gear to slide over the dogs. When you disengage the high side, that gear trys to go the other direction and the dogs wedge in between gear inside diameter and clutch drum hub and stop it from turning backwards, thus it pulls. Not a very scientific explanation but basically how any overrunning clutch works. When it no longer is able to grab and wedge in place it slips. It will more than likely start to act up again shortly.
 
Thanks a lot Pete. That gives me good idea how this thing works.

Den; the oil has a milky condensation color. I was planning on a change for winter to keep it from plugging up with cold weather.

I'll expect it to go back before long then.

Thanks a lot.
 
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