Greasing the Throw Out Bearing
First step: get favorite $%#@&^%(*& words ready.
on a Unimog 404.1, in the truck.
Remove the doghouse and all covers from floor of cab with approximately 3000 bolts. It is not necessary to remove the large boot from over the levers.
Remove the bell housing access cover (2 bolts).
Pull cotter pin from rear clutch linkage clevis and drop the link to allow the yoke to move rearward.
Pull the yoke and TOB rearward for better access (this is down inside the bell housing).
Carefully remove the wire TOB retaining clips from the pivots on the TOB assembly. "roll" them off, rear to front. Note that this is not a required step. The TOB could be greased in it's mounted position but that process has to be done mostly by feel. Also, remember it's not really easy to get the retaining clips back on afterward. I think next time I will tie a string to each clip to be sure I do not lose either down inside the bell housing. Duane Russell suggests stuffing a few shop rags under the TOB to prevent the clips from falling into the abyss.
With retaining clips removed, the TOB can be rotated to pass rearward through the yoke, and end up behind the yoke where it's "easy" to get to. It is, of course, still around the transmission input shaft so you still have to work down inside the bell housing access hole.
With two screwdrivers on opposite sides of the TOB, gently pop the face off the bearing. The face is the part which normally contacts the ring on the pressure plate fingers.