If nobody has the service manual on hand, you can order one from
http://www.samswebsite.com/ .
This article has info about identifying old capacitors, including a chart that explains the "bumblebee" color codes:
http://antiqueradio.org/recap.htm
Your TV already works so well that you are likely to have a great watcher if you can avoid making mistakes while recapping. Instead of replacing many caps at once, I would try the set frequently -- after every replacement or two -- to make sure that you didn't make a flub which suddenly made things worse.
Remember the old doctor's motto: "Above all else, do no harm."
This article has some more basic restoration info that you may find useful:
http://antiqueradio.org/FirstStepsInRestoration.htm
Have fun,
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html