Pto drum oil leak

[grampsh1]

On transmission side of Pto drum 55 super there is two o rings shown in parts the larger is on outer ring of flange holding drum oil seal a smaller one goes on pto imput shaft but not sure where as mine was broken and fell out when removing drum so not sure whether goes before spline or after against bearing can someone head me in right direction do not want to work over spline teeth and damage if not where it goes
Thanks for info
Paul

 

[SPMN]

What is your serial number?

 

[grampsh1]

(quoted from post at 07:36:56 09/14/22) What is your serial number?

y serial number is 31-126-518 oliver super 55 1955
Thanks for your reply