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]
[Linked Image]

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.