I pulled the drum off the wheel that was hot enough to steam water Both ends of the sealed bearing fell out along with most of the ball bearings! I believe the bearing was in the process of failing from overheated brakes after an hour of down hill towing......hwy80 west of Reno. W&W didn’t have the replacement and Cobra is on Holiday, but I was able to find it on line for $45/ea after giving ID 30mm, OD 60mm, H 37mm ( old bearing was. Armed AL-KO 581736).
This is the second time I have had very hot brakes after an extended downhill tow. I have fitted a simple brake lock-out that prevents the surge brake from surging! It consists of a piece of plastic pipe who’s ID matches the OD of the surge cylinder (2” pipe X3.75” for my Cobra), split it into two halves with a hacksaw and place them on the surge brake in the fully extended position. Secure them with two hose clamps and I’m good to go down the Sierras without hot brakes! E-mail me for photo.
JJ

PS, my blown tire was most probably age related, these new looking tires all have a born on date of 99!