[KTL]

1- You pull against the inside of the trailing arm. It's simply the reverse of removing the bearing, but a little easier-said-than-done. You set up the bearing nice & square, snug the puller assembly to the point that the bearing becomes slightly difficult to press in (do not use a monster wrench with a lot of leverage to press it in) and then begin heating the trailing arm. Heat the arm uniformly while you periodically check the resistance on the wrench. Once you find the wrench easier to turn, begin pressing it in. Resistance will increase as the bearing gets pressed deeper into the arm, so you may have to slightly reheat the arm a few times. I don't think cooling the bearing is worthwhile. By the time I got everything set up and started heating the trailing arm, the bearing wasn't all that cold anymore. Plus, the heat is taking away any coolness the bearing had?

2-This kinda took me by surprise. People said, oh you just pull the axle hub into the bearing with the CV axle. Not so in my case. The axle did not stick out of the hub when I installed the CV axle into the bearing and placed the hub at the outside of the bearing!!!. Therefore there's no threads to engage, to pull the hub into the bearing. I had to use the bearing puller/press threaded rod with some washers to pull the hub into the bearing. I destroyed one bearing because I did not pull on the inside of the bearing correctly. You must choose a washer size that will bear on the inner race of the bearing, not on the trailing arm. Bearing breaks real quick when its unsupported on the inner race- CRACK, bearing bites the dust. And DO NOT be fooled by temptation and try to drive the hub into the bearing by striking it. You must pull it in with the inboard side of the bearing well supported.

3- There's two ways to do this. You can cut the inner race off the hub shaft, or you can pull it off. An air powered cutoff wheel is the typical weapon of choice to cut it. I'm notorious for hacking stuff up, so I decided to pull it with a bearing separator I got from McMaster Carr. I have some pictures of it, but not handy right now.

Not sure why you're investigating the bearing dimensions- yes, it's a press fit! Don't sweat the different bearing brands. Bearings are standardized and therefore the differing brands in this application should all be of the same dimensions. And you'd be surprised to know the numerous applications for this bearing. VW Vanagon front wheel bearing, a TON of different BMW 5 and 7-series applications, some Porsche 944 variants.