I personally did not have a chance yet to work on this machine.
It, however, is very similar to another 8-pushbutton knitting machine: Brother Profile 585.
These are the pictures posted from the web with the permission of the original photographer.
Other Brother standard-gauge 8-push button knitting machines are KH552, KH560, KH561, KH581, Profile 583, Profile 585, KH587, KH588, and Genie KH710. They all work very similarly and you can refer to the corresponding articles.