OK - took apart quickly as requested.. Pump is open circuit so maybe brushes or blown coil, will try taking nut off shaft tomorrow.
The motor seemes to spin a grey magnetic disc which must drive something magentic on the other side of the sliver aluminium bell-housing.
Removing the barrel shaped solenoid drivers exposes the shafts and both should be out when not energised (as in photo)
Looks good quality bit of kit but not sure worth over a grand.
Attachment 17576
Attachment 17578
Attachment 17579