There is an excellent set of instructions by "Red Three" freely available on the Morgan Three Wheeler Club website that detail removal and refit of the rear wheel and hub.
https://www.mtwc.co.uk/wp-content/uploads/2018/01/M3W-Rear-Hub-and-Sprocket.compressed.pdf. In addition to this there is an article about rear wheel upgrades and checks in the MTWC Bulletin magazine in May 2021 edition, although this is available to members only. The information relating to the type and size of bearings is in the Alternative Parts List, also freely available on the MTWC website or at the top of this forum in M3W Resources.
