So today was installing shocks (had thread cleanup to do, etc) and finally tackling the center arm.
So to start, I'm 99% the same as what's shown here:
I am looking for any help on rebuilding my center arm on my 64 FJ40. The Haynes manual explodes the later style and the Toyota repair manual doesn't get too detailed. I have pressed in the races and that's it so far. Any idea's as to o-ring placement and which felt to use?
forum.ih8mud.com
Just a summary up front: As can be seen from the referenced thread, there really isn't a proper fit for that large grey felt dust seal. Whether or not this was correct, I ended up trimming that seal to fit in the lower bushing area, around the spring. There was simply too much to stuff in there and fit the dust cover to where it would slip into the o-ring and create a seal.
To start, there wasn't a bevel on the new bushings to allow clearance for the radius on the shaft, so I had to cut one in so it would sit flush so I had to cut one in.
The oring groove was a bit bent up from someone in the past probably banging on it. I just had to touch up a couple spots with a super thin cutting wheel to get the oring to seat.
So the seals: long story short the lower dust cover needs to seat on the oring. I had to trim the large seal to fit. I have no idea if this is right, but I think the assembly is functioning as it should. And I don’t remember a piece that large coming out of the old assembly.
Seems to fit up. The spring preloaded and the lower dust cover seated on the oring. The lower castle nut/bushing slip fits into the lower bracket. Looks like the lower bracket is strictly to provide radial support.
I didn’t snug anything up yet, but looks like it’s going to work.