My D2 Serviceman's reference book reads the following on water pump removal (earlier tractors):
"Remove capscrews securing the water pipe to the bottom of the water pump housing.
Take out the capscrews holding the fan and the water pump assembly to the timing gear housing.
Lift the fan and water pump assembly from the timing gear housing."
If a gasket cement and or a silicone sealant has been used instead of a gasket between the pump and the timing gear housing is may well be causing the pump to be held in place. Have you tried applying pressure with a pry bar to break the seal?
I heated the surface and pounded a screwdriver in each side towards the top. It moved only so far and that was it. I soaked it down with kroil and gave up. I realized I should have used gasket solvent or something. Maybe tonight, I'll heat it again and try squirting Gasket Solvent on it again.
I am wondering if it isn't rusted into the body of the cam cover. Somehow?
Thanks!
I just check mine and their only 4 screw on the wather pump that must be rusty inside but it only 1/2 inch shoulder inside you can use fuel or w40 that can help you to free up.