Trimming it that far back will lead to significant loss of foliage and open wounds which it will likely be unable to encapsulate before rot or disease enters.

Is the tree larger that the space permits? As in is it in the power lines, over the house, or something similar?

Thank you for your replay. The space is OK for the tree. The problem is me climbing the tree. Spraying is no problem because I have sprayer which can reach the top of the tree. I have the habit of climbing the tree and looking at the small fruits, if the branch has lots of it I thin the small weak ones and leave the healthy ones so I get good size pears. Also the harvest is a chore. But if trimming it will hurt it I will leave it alone. I love that tree. The fruit are sweet.

how about ordering some newer dwarf trees... and getting rid of the monster in a few years when the others start producing ...

i really dont think you should be climbing with your sprayer ... really now.. what we could do a decade ago.. isnt quite as smart now ...

otherwise.. i am surprised that pears need all that much spray .... for the homeowner ...

there is a fruit forum.. and there used to be some great fruit experts over there .... might want to try them with the question ...

ken

PS: professional fruit producers replace their trees frequently to avoid these issues .. cost of doing business ... but the tree peeps would NEVER TOP A TREE ... google that and you will see why ...