bosch leaking derv

[Jiffy]

That guide only covers a pump that has screw heads holding the lda pin shaft in place.
Most 306 bosch pumps ive seen have had ball bearings pressed in, which are a bit more of a ballache to remove and replace.

That's covered in the text:

If the aneroid has the ball bearings, then it is necessary to appropriately support the aneroid and use a punch and hammer to tap on one of the ball bearings until it pushes the rod far enough to push out the opposite ball bearing. Then flip the aneroid over and use the punch on the rod to tap out the remaining ball bearing and the rod itself. The ball bearings can be hammered back into place on reassembly or the holes can be tapped to 1/16 npt and allen head plugs used instead.