These are heavy old lumps and quite difficult shaped pieces. An engine crane and two able bodies will be vital. Some rollers as Paul suggests will make life easier.
Like Paul suggested take the vertical head off, If it's got the fibre glass cover remove this first (or you will damage it !!) I'd leave the vertical motor on as this helps with balance.
Take the handles off next or again your likely to damage them, they are keyed on but with a bit of care should come off fairly easily and the removal of the knee gib allows it to be moved away from the column. I'd remove the column door again to save damage. You can split the column from the base and if you remove the horizontal motor this involves 5 Bolts from memory.
Photograph any wiring you disconnect and take a good imperial based tool kit (Allen Keys are a must)
Great Mill and there is a Yahoo group (albeit not very active, is a good resource of relevant information)
Philip
Edited By Philip D on 30/04/2018 20:08:02
Edited By Philip D on 30/04/2018 20:12:39