Thanks for the tip. I used a puller like you said but some one before me who had painted the pump got paint to stick between the shaft and the pulley. In the end I used puller, fire, and hammer to get the BLEEPing thing off. The pulley got damaged.

I didn't realise this but you just need to tap out the shaft from the housing once the pulley has been removed.

Unfortunately as it was a bit stuck the vanes all fell out before I could see which way they go back in.



I assume you need to put them in this way



Is this correct? The vanes have a sharp flat end and a curved cornered end. I'm guessing the curved corners go on the outer side of the rotor so that they don't scratch the stator.

Am I right? (Just checking)