Piet I think 116 is the spacer between the outer main bearing and part 56....When part 56 doesn't have the spacer already machined into it. (There are both types). As for your cush drive nut coming undone. I'm guessing that you are simply not getting it done up tight enough. The usual hammer and drift is not a good idea. I put loctite on the thread and use one of Robb Nortier's special sockets. A normal ratchet will do the job once you stop it from turning, but I do them with my battery hammer gun. Ron
Maybe I have the wrong spring, or my spring is not long enough....? I could just screw on the nut by hand where I read somewhere else that there is a "compression tool" for the spring....
Can anyone tell the "un-compressed" length of the spring?
Piet the cush drive spring free length when new is 1 5/8" (41.27mm) down to 1 1/2" (38.1mm) is acceptable. No compression tool is needed, it's probably the clutch you're thinking of.
I am selling some of Robb's (USA) cush drive and clutch nut tools on his behalf in UK/Europe at £22 each. Email me if you want further details.