Here's the skinny:
You do NOT need a special tool to replace the thrust bearing, as the brake does not have to be undone. The thrust bearing is located in between the large drive pulley and below the brake.
The model number for this Herrin platform machine is located on the top of the control panel on the left side, slightly to the rear. The instructions are wrtten in black and white inside the new kit. The old thrust bearing consists of an array of washers and a thin bearing. The new kit you replace it with is an 'encapsulated' bearing, much simpler and less parts to confuse you with.
Your model is probably a PAV3200AWW
, so the thrust bearing kit is part # 12002213