I assume this is the page from the manual you are referring too,It is pretty vague you are right, Do you have #5 on the correct way not upside down or back to front & all parts in the correct location, From memory when you install the spring the spindle will turn a bit before hitting home,No real tricks otherwise,you need to fit the clutch cover temporarily to check if it's working properly as it will cock sideways & bind
,Was there a problem with it or are you just reassembling after an engine rebuild?