D-5 96J Steering clutch questions

I have a D-5 that the left hand steering clutch wouldn't release. The adjustment under the cover was tightened as far as it would go. I removed the clutch pack,it measures in tolerance with my D6-B service manual. I haven't taken the discs out yet to see if they are stuck but I assume they are. Why would the adjustment be taken up all the way if the discs are still within spec. (assuming the D6-B has the same spec) I can see a brass collar near the throwout bearing that can be moved with a spanner wrench. Is this an adjustment or something else? I need to reline the brake as it was completely worn out. Thanks in advance.

Maybe I misunderstood as you said the adjustment nut was turned down tight but that adjustment nut has to be backed off until there is slack at the adjuster for things to work correctly.

I was referring to the nut on the yoke that pulls the throwout bearing.

If that is the steering clutch adjustment nut it has to be backed off to fully engage the clutches, there should be slack between the nut and the yoke. Send a pic of that nut.

Has someone adjusted that nut up tight trying to get the clutch to release?

What’s the history of the machine and the attempts to repair this problem?

Well I did misunderstand-he's trying to get the clutches to disengage. Sorry about that.

Just thinking about this. Have you checked the socket that the yoke fits in at the bottom of the case. If that were damaged or worn out no matter how tight the nut is it wouldn't release the clutches. Just a thought. Charlie