Sorry if I sound a little vague, but it has been a long time since I have seen in one of those. I think there are four fingers (there may be three) on this clutch that are attached to a thrust pad that the thrust bearing runs on? Have all four (or three) come loose? If not, with the pressure plate bolted to the flywheel, take a measurement to the top of one of the ones that has not come loose and then adjust the one that is loose to this one. If I remember correctly, there should be two nicks in the adjusting screw so that the top of the adjusting nut can be staked to lock it in place.
Sorry if I am way wrong on this, but I am working of memory and a bad one at that!!
Hope this helps.