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I just pulled the pressure regulator apart on my 40 B. I left the canister in place. Unless the can is deformed or damaged I wouldn't try to press it out of the case. The canister is sometimes damaged due to over tightening of the long filter bolt. It threads into the regulator head and pulls down on the can. When I removed the regulator I did find the top of the can bent down due to this. This could cause oil to leak past the gasket and cause a drop in pressure. My fix was easy with a few taps with a hammer and piece of 2x2. The regulator is held in place with 3 bolts up inside the can. Problem is you can't get to them because the oil filter outlet tube and disk are in the way. This part is pressed into the regulator. Reach up and feel the sides of the tube, right next to the disk are two holes on opposite sides from each other. The service book instructs you to make a long hairpin from 3/16" rod. (Bend the tips 1/4" up on both ends of a 3' rod. Then bend the whole rod in half into a U shape with about and 1" between the two parallel halves. Slip the 1/4" tips into the two holds and strike the U part with a hammer or pipe) I tried this and couldn't make it work... So I took some #9 fence wire about 3' or so and bent it half with just a small loop left in the end. The loop is small enough to slip inside the tube but not squeezed flat. I looped the free ends around a large flat washer. Bend the wire around the washer and smack it tight with a hammer. Then I took the slide part from a slide hammer and slip it through the wire, resting on the washer. Slip the looped part of the wire up the tube and fish a 1/4" or 3/16" bolt through the pair of holes catching the wire inside the tube. After a couple of slides of the slider and it was out; took longer to type it up than to do it. Hope this is what you were looking for and I didn't type this up for practice! :) Jason
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