Pretty sure it is a homemade conversion. It must have been hairy to drive as I am sure it would nose dive when lifting a load. Unless a clutch has been fitted it would be very hard work driving into a load, slow down select neutral, rev up lift load, slow down select reverse, rev up to start reversing, The rams are very large dia so it would have a big load capacity I am surprised the hydraulic pump of the MG6 would cope even with the extra oil tank but it obviously did. As a machine in its day it would have been ideal for mucking out calf boxes or stables with restricted access. I have seen loaders made to suit Ransomes crawlers other than the Ransomes Whitlock loaders I think it may have been Webb that made them also fitted to Wheelhorse and other mini tractors.