Originally Posted by DanMartin
I use a heat gun to heat up the cover prior to installing. Or just stick it in the Texas sun for a while. 150-200 deg is all I want. When using epoxy the cover is only in place long enough to tighten the bolts,take the bolts out,remove the cover and crownwheel assembly and tap the bearing loose with a rubber hammer. Never considered the harm to the bearing because up to this point the bearing is going to be replaced anyway.
One of the possible reasons for bearing failure I have wondered about, in addition to improper preload, is trauma to the bearing during installation. Mechanical engineers I have spoken to on the subject have indicated that it would certainly be possible to cause micro-fractures in the balls or races that would lead to eventual failure. I don't know how much pressure would be too much.
I remove the bearing and crownwheel assembly from the cover using both hands, holding the cover with fingers and pushing the hub with both thumbs. If I can't get the bearing out doing that, I put the whole assembly back into the oven at 250 degrees F for a few minutes. The bearing will drop right out after that.
Not sure what that heat would do to you epoxy. You could try lesser heat. I've had some drives where I could press out the bearing from the cover when all components were equal temperature, but that is the exception. Most of 'em require some amount of heat to get the bearing out without pounding, tapping, or using a press.
(It is kind of surprising to me how much variation there seems to be between drives in terms of machined tolerances.)
Thanks for posting your experiences with the epoxy method. It seems to be a method most easily done by do-it-yourselfers.