310 in an oliver super 88

Swapping a 310 diesel into an Oliver Super 88. Not clear from my research whether the clutch shaft needs to be shortened or not. I didn't shorten mine but now my clutch doesn't disengage completely (almost but not quite). Thinking the clutch shaft is binding just a bit against the flywheel PTO spline (it was a snug fit when I put the bolts in the coupler during install). Any thought on what I am thinking makes sense? If so, how much should I take off of shaft. Pretty clear it would have to come off the pilot bearing side.
 
I'm going to be doing the same thing soon if I can
find a 310. I was always told no mods necessary on
a 88 but about 1 1/2" needed taken off shaft for a
77.
 
O. K. What flywheel and what clutch are you using? Are you using an organic or a "button" clutch? If using a button, how is your flywheel machined?
 
You need to use the 88/S88/880 backing plate, flywheel, clutch, pressure plate, and bellhousing. All of these will bolt on to your 310.
Which parts did you use?
 
Thank you for all the replies! Yes, used S88 diesel flywheel and new ceramic button with HD pressure plate (11"). Didn't do anything to flywheel but it looked ok. TBH, I didn't indicate it for flatness but, like I said it sure looked ok. I am guessing the 310 crank is probably just a bit thicker than the S88's (7 main bearings and whatnot). That would explain the need to shorten shaft.
 
Here's an 880 with a 310 in.. I think I used a 770 input staff and pro.
a152373.jpg
 
(quoted from post at 07:57:11 02/24/17) Here's an 880 with a 310 in.. I think I used a 770 input staff and pro.
a152373.jpg
ow does that work with the bosch pump on a 310?If you used a 770 shaft you must have cut it.It would be longer than an 880 shaft.
 
There is something else wrong. You do NOT need to shorten the clutch shaft when installing a 310 in an 88. A 77 yes the clutch shaft needs to be shortened.
 
Ok thanks for the info. Also been told pressure plate fingers could need adjusting but I don't see how that could cause drag. Pulling motor tomorrow. Hopefully I will have a positive post tomorrow evening.
 
Tractor good to go. Ground about 1/16" - 3/32" off of shaft and adjusted fingers. Shifts just like it should now. Don't know why finger adjustment would help but they were definitely not set to spec. Someone on this forum graciously sent me specs on how they should be set. Shortening shaft definitely was needed as there was zero play in output shaft. Now there is just a tad. Maybe shortening is not always required but my setup did require it. Regarding 880 w/310, is that one of the early 310's with indirect injection?
 

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