Bill,
Many thanks for getting back to me
Here is a brief summary of my challenge and pictures below
The HFL is mounted in a sound proof case as usual, which in turn is mounted inside an engine room on the boat with little clearance including head room and I cannot get the whole unit out through the main engine room door...so I have no choice than to work on it in situ!
Do you know if it would be possible to cut the front off the sound proof box (assuming yours has one), then split the overall unit in two where the engine block bolts up to bell housing/generator half of the unit by sliding the engine half forward to get access and make repairs to the coupling, leaving the bell housing/generator half in place.
Does the genny have a mounting frame in the base of the box?
Then plan to re-locate the engine back on the bell housing and stick the sound proof box back together again, reconnect all services etc
All of the above is a theoretical plan based on known constraints and no reference to how the generator comes apart or goes back together again after repair
FYI - Assuming I can get access via the above process to the coupling I can turn up new nylon or PTFE pins on a Lathe
I look forward to hearing back from you