The main reason this one was in the shop was to see why the Power Director would not stay engaged in either low or high range. This required splitting the tractor at the back of the torque tube.

With both ends supported, the rear being mobile in this case was rolled back.

With the Power Director Clutch removed, this is what the two halves look like.

Here we see the power Director Clutch before disassembly.

These are the plates with the ramps that the rollers roll up on and get overcentered to remain engaged. The ramps show wear at the spot the rollers contact. These plates are available so replacement would be good.

There are 3 rollers for each range, 6 total. At least 4 should be replaced, all 6 for good measure.

Here are the internals of the Power Director stacked without the housing or shims.

When new the shim stacks are .085" on both high and low range sides and .035" in between the center plates, for a total of .205". When adjusting the total must remain .205". This one has been adjusted at least once and the stacks were:
Front .075"
Center .060"
Rear .070
This kept the .205" total nicely. The friction discs look good and don't show any uneven wear.

The rear or high range has three toothed friction discs

The narrower hub rides in the high range with three discs, the thicker rides in the low range with four.

The front or low range has four toothed friction discs