Turn the axle (you could take it easy with a slow bore),
 turn the right direction!

See if pump gives 6 times the same oil amount!

You can bring new oil in the  hoses by using an injection needle with cut of edge pusching tight to all the 6 O-rings.

No air in the hoses anymore and new oil at the places were it belongs.

You need an extra impeller, and grind away some impeller so the puller get gripand fits in the narrow space.

The withe steel block is used as ground for the screw of the puller and rests on every time bigger spacers when the waterpump is coming out the engine. Because the space between the impeller and the block is very small.