A warm welcome to the ODK forums, Grannic! :welcome:

It sounds very much like you have a Greenfield HD-8, which were made up to the early 1970's.

You may find the pics in THIS past thread helpful in identifying whether it is the early or late series of the model.

HERE is another thread with useful info and pics for this model. Also THIS one.

There is an Illustrated Parts List for download on THIS ODK page, too.

See how you go, once you've digested those. grin

Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."