I have a 1650 that the front oil seal for the crankshaft is leaking. I've got it all torn down and ready for parts. I'm a little confused by the wording in my IT shop manual. I only removed a bad &quot;felt&quot; seal between the pulley and the timing gear cover and the spring loaded cork faced seal that is under the timing cover. The IT manual says &quot;install a new sealing gasket on the crankshaft, place new seal on shaft with sealing face out and place a [b:2gqm8gph]second[/b:2gqm8gph] sealing gasket on shaft in front of the oil seal&quot;. I didn't remove two of anything. What am I missing? I'm inclined to put it back the way I found it. 

(My confusion may stem from what I think is the &quot;oil seal&quot; and what is a &quot;gasket&quot;. I don't have a parts book for this tractor or the factory shop manual like I do for my 1800. I have'nt looked at it's book for similarity.)

Since I pulled the steering cylinder out because it also leaks from the bottom I thought I'd rebuild it. Question number two, I found an Oring in the casting below the quad ring. I'm guessing that the IT manual is putting this as item #6 (quad ring is #12)? I just want to be sure I'm not missing something and not getting all the parts I need for the rebuild.