There is no method to repair the kind of damage you are describing. The concrete idea has long been discredited, it does nothing to help. Tar or any other kind of wound sealer do not help either.

The tree could last a long time, but you might consider propagating it if it has sentimental value. You could collect seeds this fall and plant them next spring. In a couple years you can graft a cutting onto the seedling(s). Pear is really easy to graft.

You could look around for some volunteer seedlings from the tree and graft this spring, or you could order rootstock for grafting. Really, don't be intimidated by the idea of grafting. If you can mix up a batch of concrete, you can graft a pear!

Alex

"Repair" is certainly out of the question, but you can reinforce what is left. From the description it sounds like a splitting failure is going to be likely in the future. You can cable the two main trunks together. with an eyebolt in each, a bit of cable and turnbuckle to tension it up when done. They will help to support each other. the further above the likely split you can get for the cables the more they will support.

Thanks, that's pretty much what I thought. I'll get busy (if it ever stops raining) and use up some cable I've got in the barn.

Thanks again,

Ev