you can find a threading diagram at this url. I was surprised to find this type of info on the internet even though I know that everything is on the great www. hope this helps.
dbc
March 2008
to thread the machine, from the reel pin take the thread to the left and over the guide above the takeup lever, make sure the presser foot is up, straight down the right hand side of the tension, round and back up to the takeup lever, right to left through the takeup lever, straight down through all the guides to the needle, left to right through the needle.