Jaars, If you have your replacement seal in hand, look at it closely on the inside ring. You will see that the rubber has either 1 or 2 slanted rings.
Now the slant always goes’ in towards the oil. Never forget that. Other wise when any pressure builds up the oil will come right out,, not pleasing thing. 😡
Now for the install. You can install the seal with out taking the face plate off. When you are starting the seal into the grove for it , try to make it as flat as possible. Using a vasoline type lubricate both the shaft and the seal, in and outside.. And the seal grove!!
I always use a wooden block( cut off broom handle or dowell) for starting a seal in , then as it starts going in tap the wood with a hammer and carefully at that. A metal ring seal will bend and become out of shape, the rubber ones tend to go in a little easier. Either seal, with the block go around the seal to seat it fully flat.
Oh yes and clean up all that slippery assembly grease, it does not help a clutch, use dry clean rags…
Well thats about that.
Good luck in your venture.
Chuck and The Pumpkin