[dadandlad]

Hi Ed
The gears are the original pump gears and the cavity they sit in is the original
Basically all you are doing is removing the bulk of the original pump and fitting a couple of end plates.
I will see if i can lay my hands on another pump and do a step by step tutorial.
The original pump was good for 100Bar but with the motors we use in modelling i will not be able to reach that sort of pressure.

There is a gentleman who lives close by and made his own pump from 2 meccano gears sat in a close fitting housing which powers his excavotor very effectivley