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oil pump screws- no help other than the obvious to get them out, PB Blaster, maybe rap the screwdriver with a hammer a few times to help loosen-up the screws. Use some heat, like maybe a propane torch. I would be afraid to use a oxy/acetylene torch for fear of overheating the pump housing. It is common to use lead gaskets between the pump housing and the cover plate, which may melt if it gets too hot. Keep working on those screws, with patience & PB, you should get them. Use the right size screw driver so you don't damage the screws other pitfalls - yes, if you have a typical rebuild kit, your new aluminum drive gear will need pressed-onto the new pump shaft. If you don't have a press, you can drive that gear on by using a socket over the drive shaft hole and tapping on the socket with hammer to drive-on the gear. Be careful to drive the gear on straight. You also have to drill & tap a hole 1/2 in the aluminum & 1/2 in the steel drive shaft for the set screw. The drill will want to run into the softer aluminum. It is quite difficult to do with a hand drill, but no problem with a drill press. You can buy a special tool from this site to help you do all that... but you don't really need it if you do the above. The clearance between the pump housing & pump cover plate is set by the gasket. You should have a new gasket with your rebuild kit, don't try to cut one from general purpose gasket material.
It is up to you if you want, or need to press out the bronze bushings for the pump shaft. If you do, they will need pressed-in, then reamed to size. I didn't replace my bushings, didn't seem to need it.
The relief valve rebuild is pretty straight forward.
Make sure you get a good seal on the oil suction line so the pump doesn't suck air, Make sure the suction line fittings are straight & sound.
Finally, you will need to check the backlash on the pump drive gear when you re-install the pump. There are metal shims between the pump and bearing cap to adjust that backlash. The Fergy re-print manual is very thorough on all this and will walk you thru the job nicely. I don't kow what kind of instructions (if any) you may have gotten with the rebuild kit.
You should be able to rebuild that pump yourself, unless you get into pressing & reaming the bushings, which a machine shop can do if you don't have a press, reams, (few of us do). Good luck, let us know how it goes George
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