I suggest you contact your Cat dealer about winch manuals. From my experience with Cat equipment in the past and getting parts for my 426 recently; have the serial number with you when you do. There may be three manuals for the winch. Parts, Service, and one that may be called Testing and Adjustment or Operator's Manual.
You may be able to access the Cat parts catalog for your winch here https://parts.cat.com/en/catcorp/PartLookup
You may be able to access the Cat manuals to purchase for your winch here https://catpublications.com/
I doubt it has power out. If it has hydraulic controls, Free spool may require hydraulic pressure (engine running) to release the brake. Wish I could help more but the Cat winches I worked on were the old mechanical ones for cable blades and scrapers, not like yours. And it has been many years so details in the memory bank have faded some. What does the cable swedge you are trying to remove look like (photo?)