carco f 4 winch

Does anyone know where I could find info on my winch? Have been searching the internet with no avail..... or maybe I am not reading the tag right, looks like a series F and farther on it has a 4 by itself. The layers of paint look thicker than the plate itself.

Winch in question in on a D6 9U. Would like to check over the winch before it has to be used.

You might want to see if this site has what you need http://www.paccarwinch.com/

checked out the site, but they only go back to 1970. If this winch came on the dozer I would need to go back to 1953.

Tag reads,

Model F serial # 2213 F 4

still working on removing the rest of the paint.........

A couple more places to look http://www.chezadria.com/winch-service-manual/ http://www.heavyequipmentforums.com/