1962 MF765 pump issues

[GinginMF765]

Hello all.
First time playing with tractors. My father in law bough home a 765, runs fine but no hydraulic function. After a few tests I saw on YouTube we changed filter and oil. Still not luck.
After pulling the top off and getting to the pump I notice the locator dowels are both snapped and bent and part rod the pump housing is missing.
I got one dowel out but not luck at all on the right side.
I've attempted to remove the pto plate and the counter sunk Allen head bolts refuse to move, snapped three 1/4inch tools trying to remove. I've applied heat from a butane torch I use to anneal brass. Next stop is easy outs and drills.
Any advice? Are the cheap pumps online worthwhile or just junk.
Thanks in advance for help

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[used red MN]

Hello Gi welcome to YT! I really do not know what I am
looking at in your top picture I am guessing it is the
pump towards the bottom of the photo. I assume
where the casting is broke out at the left center of the
photo is a problem you are addressing? Are the bolts
through the circular part the ones that you cannot get
removed? If so those are referred to as ..hex.. head
bolts. What quality of a tool are you using? You might
try purchasing a Craftsman brand however I am not
sure if their quality is what it used to be. May end up
chasing down your Snap-on tool guy for a real quality
socket.

 

[GinginMF765]

Hi. I have quality tools but I believe I will
Have to drill them out. As for the pump yes the case has broken off on the left of the picture. I managed to remove that side locating dowel but the other side dowel is bent and no longer attached to the external diamond shape plate.
I'm concerned as to what would cause this damage to the pump? Could it be impact on the end of the pto shaft?