My wife was out for most of the day. Heated the cases to 270 Fahrenheit (133C) in the home's oven. I took great care to vent the oven and the house. Got busted anyway.
Had previously frozen the bearing for about 3 hours in a normal refrigerator's freezer compartment. Some of the bearing were almost drop-ins, others took a bit of gentle encouragement. Nothing went wrong. That said, I used a very thin coating of anti-seize grease on the bearings where they contact the case. Overall: Very happy.
Next time, I'll heat the oven to 320 and use dry ice to freeze the bearings. Is there a point of no return using this process with a domestic oven's temp? I've seen some use heat-guns. Others, propane. One US maintenance professor said the aluminum shouldn't be heated to more than 230F. A UK guy said 160C, which is 320F. I chose the oven, as I wanted to do all the bearings in one session.
One problem. Pushed one seal in too tight and had to pull it back out. (Just the seal, not the bearing.) No damage could be seen on inner lips of the seal, but feel as though I should replace it with a new one. My Yamaha dealer can get seals in about 3 days and doesn't charge shipping. The seals I'm using are from "Simply Bearing" (Thanks, Warwick). It takes about two weeks or more to get stuff from the UK. So, for one seal, I'll bite the bullet and pay retail for a Yamaha part.
Will finish the seals tomorrow and try to get the tranny back in the case.
That's it for today. The Final Four University Basketball teams play in about an hour. For you guys in the US, I live near the border of Indiana and Kentucky. Basketball is a religion. I don't want to lose my righteousness card.
Best to all.
Steve