I notice that you are not ready to install the upper piece. From the picture, you are missing the brass riser and cast iron handle? I always have the top completely together before I mate it with the bottom? Anyway.....Remove the upper part from the pump up. Pipes should have unions that can easily be disconnected. You might have to lower the pump by loosening the pump mount bolts. Lay the top and pipes across a padded surface. Sawhorses are good. Install the skins on both sides and bolt tight. Cut some cardboard to lay on the top of the pump base. Making it a two piece, split longways with the pipe access trimmed out. The cardboard protects your paint. Be sure to mark and cut out the four mounting holes, on your cardboard. Next, you might need two people for this but, lift the upper section and place it on top of the cardboard, aligning with the mounting holes. Lean the top back on one side, remove the cardboard, on that side only, and place two bolts into the holes. Add washers and loose nuts. Carryout the same thing on the other side, making sure to carefully locate the top unit over the required bolt holes. Be careful of the paint. Once in position, bolt down tightly. Lastly, re-attach the pump to the pipes. I've done quite a few of these Fry's and it works every time. Paul
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