does anybody know about old three phase electric Southern Cross water pumps used on farms ?

Question

It has a 4" bore with a 5" stroke and is about 40yrs old, the pistons are actually leather "buckets" . I need to know how to adjust the solanoid that regulates the cut off for the water pressure. I can provide serial numbers and model type if required. Also spare parts if possible.

Answer 1

http://www.nationwidepngpages.com/Southern%20Cross/southern_cross_pumps_and_irrigat.htm