Brace, Clamp, or wrench for Diesel CAV Fuel Injection pu

Disassembling the fuel injection pump for my 1986 Ford 2810, in order to check out the plungers located behind the rollers, and there are two bolts that I am unable to remove. It is pretty difficult working with them because they are located on a cylindrical head that is free spinning, thus making it nearly impossible to apply force in order to break them free. I am hesitant to lock it down in a vice, because the cylindrical head has important markings and engravings denoting information regarding timing and functionality of the pump. Seeing how the pump is a high precision piece of mechanical engineering, I rather not risk performing any action that could potentially mar the head or cause metal fragments from falling into the internals of the hydraulic head.

So it seems that some form of brace or clamp might be needed in order to break free those screws, and I was wondering if there were any suggestions or plans on how to fabricate one, or whether there were any suggestions on how to resolve this dilemma?

The part has sat for a day in my mixture of Jesus juice (acetone/atf fluid) in order to help desolve any rust that could prevent their loosening. I am able to slide the blade of a large flathead screwdriver in the other end and prevent their rotation, but due to the angle of the blade, very little force can be exerted upon them. I have also rather recklessly attempted to use a large pipe wrench to hold the cylinder in place, which slipped and was unable to grab hold of the cylinder. Placing two pieces of wood between the teeth of the vice and the cylinder might work, which would hopefully hold onto it and not mar anything.

I would reach out to Dieseltech on here. He
can and will give very good advise on what
to do and not to do

Leave those bolts alone. Remove the vane driver instead and
pull the rotor out of the head..

(quoted from post at 18:55:29 09/06/21) Leave those bolts alone. Remove the vane driver instead and
pull the rotor out of the head..

Click to expand...

I gotcha, it is that small Allen head screw that sits under the two vanes. I had previously attempted to remove it, I turned and turned and turned, without any apparent progress. It has to be one very long bolt. I wasn't using a very friendly allen wrench at the time, I will try again with a proper one.

I will be so thankful when I get this tractor working again, it has taken me way longer than planned or expected. We might even break a bottle of champagne over her in celebration.

Thanks for the help.

NO!!! Leave that screw alone too! Your best bet now is having
a QUALIFIED pump tech go COMPLETELY through the pump
assembly...

The allen head screw is fully backed out, and will tighten when reversed. It just doesn't want to fall out of the slot. The entire pump could use a thorough cleaning, having diesel residue built up over the years.

I appreciate the help and the advice, It is important that I do this myself. I have my reasons.

Knowing the rotor head simply unscrewed from the hydraulic head and an Allen wrench is not needed for disassembly, really would have been nice to know.

Thanks