Replaced clutch in this 1750. Reinstalled PTO Shaft ok. 
need to know what size o-ring and lock ring to use. Also any info re installing o-ring and spacer/plug and lock ring would be greatly appreciated.

Clutch A=ok now and PTO works ok , problem is oil leak due to need of o-ring.
I have service manual however size and installation of o-ring not mentioned.

Thanks for any help offered.