Hi DrDave, welcome to Outdoorking.
There is a combined owner manual and parts list for that machine in the manuals section. Here are the most relevant bits for your current question:
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2014/12/full-2772-19107-victa_8_34e_brake_part_numbers.jpg)
You may notice that Item 52 is described as "Brake", but it has no obvious connection with the disk brake, Items 76 to 81. It may be the cutter brake.
I don't know if this will provide all the information you need or not - please let us know.