[Yosemite Sam]

Your order of assembly may be holding things up.

The bearing should be installed into the cage first, then #15 snap ring to keep the bearing in the cage.

With no other parts in the main housing and no "O" ring on the cage and no seal in the cage, put the huge washer into the housing, then put the cage in, to see if it fits. if it does, great. If not, you gotta find out why.

Once you get the cage to fit in the housing correctly, put the big "O" ring on it and put it back in and install the big snap ring.

Then #7, #9, #11 and #12 need to be assembled and installed from the other side.

The shaft should then go in far enough to install snap ring #8.