To the untrained eye, your old bearing kit might appear OK. This is the new, improved thrust bearing made specifically for your machine. It is not supposed to look like the old assembly, as the instruction sheet below shows. Please read the Thrust Bearing Instructions on the following document:Thrust Bearing Instructions (new style)
If you want JW to assist you on this, I cannot guarantee you won't damage the machine.
The instructions are quite clear and this is really a quick repair if you follow them. Unless you replace the assembly, you don't know if the machine will spin right or not.
You are supposed to throw away all the old parts, including the large washer you mentioned. The new kit replaces all those parts with a simple few. Focus on what I am telling you. This should never have taken up 2 pages to explain....