I did not receive an installation manual with my 75E dish but was able to properly assemble it. Thanks for the help on obtaining the skew setting from my question in another post.
I see where the LNB arm is slotted. Is there a dimension for the distance from the LNB to the center of the dish? I assume the slot is for that adjustment.

I could be wrong, it has been a while since I assembled one but I think you just push the LNB as far onto the arm as possible, then tighten down, I did not think there was an actual adjustment mechanism as such.

That's right just push the LNB all the way down the slot.

Have you confirmed the lnb is for a 75E dish?
(it will say something to the effect of "for 75E dish only").

Yes the lnb is for the 75E dish.

This may be helpful:

http://www.global-cm.net/SC75Eassembly.htm

Very helpful. Thanks for the post.