RCA tube set with no picture and a strained flyback

[Notimetolooz]

Ha-ha. I told you TVs are complicated.
The horizontal yoke winding is used in conjunction with the flyback to generate the CRT high voltage.
Those TVs with the CRT separate from the chassis are a pain.
A good time to remind you that CRT are delicate and dangerous. Separating the CRT from the cabinet means great care must be used. Probably best not to remove the CRT from the cabinet. Back in the day TV repairmen usually drove a panel truck to haul the TVs. Another trick was to use special small test CRTs that could work well enough with the original yoke and CRT socket.
He could leave the CRT and just take the yoke and the chassis to his shop.
If you haven't checked out "Phil's Old Radios" website, he has a number of interesting articles about TVs.
https://www.antiqueradio.org/8XP4PictureTube.htm