When I replaced the corks on my clutch discs, I found that the two nuts that hold the clutch pack together had some kind of loctite on them to keep them in position.
When I re-assembled the clutch pack, I used a medium strength loctite on the threads of the nuts.
I want to be able to re-adjust the clutch pack in the future.
As far as adjustment of the clutch packs, I also found that if you do the nuts up tight, there is no free play for the clutch plates to work. You then need to back the nuts off a bit to give you enough play for the clutch plates to travel.
I still have a bit to much pedal travel and need to re-adjust mine a bit more.
This can be done in the mower and does not require you to remove the whole assembly to do it.
I did check the pedal travel on the new Greenfield mowers and found they have very little travel in the pedal for forward and reverse.
As there are no maintenance manuals that explain the correct procedure for this job, this is the method I used. This comes from my experience as a maintenance fitter.
I'm not saying this is the correct procedure or how it was done from factory but it works for me.
The mower is going great and except for a little more pedal travel then I would like, the mower is going great.
