Travel trailer brakes - magnet question

[Almot]

No photos, sorry. Brakes are similar to those in Sticky thread here. 3 major parts - 2 shoes and magnet on some "arm", for lack of better word. Being not a mechanic, I hope my descriptions make sense.

Short story: I think magnet on one wheel is causing drug, rubbing against the wheel drum when brakes are NOT in use. I can rotate the wheel with my hands, but it won't spin, goes maybe one inch and stops after I let my hands off. I can hear constant friction noise like "shhh" when rotating. Magnet is sitting on the spindle of the arm, and there is a spring on this arm behind the magnet, and I think something is missing.

Q1: how far and how fast can I go with this? I'm in Mexico, closest good mechanic is 15 miles away, and charging US prices, for God's sake. Would like to go as is, 300 miles to where I want to be, if possible.

More details and Question 2:

I opened this one brake because it wouldn't spin after the hurricane with mud up to the axle. It turned out to be just mud inside. Bearings were fine, I repacked the front bearing since I opened it anyway. Could've lost some retaining ring from that "arm" that magnet is sitting on - while opening the drum, or some time earlier. So the magnet is now pushed by the spring from behind all the way to the inside surface of the drum. This is I think what happened. Sand is like water, you drop something and it's gone.

Q2: what this washer or ring might be?

Other 3 wheels I can spin, at first they didn't, I slowly rotated them back and forth, mud and other cr.ap came out and they spin now. Won't open them now, just will have mechanic to blast them with air and brake cleaning fluid. I can hear intermittent metal sounds like brake shoes or some garbage is touching the drum, but they spin.

[Old-Biscuit]

Magnet is held in place by 'clip'
Spring goes on pivot arm stud then magnet then clip goes thru center of magnet and snaps in place onto end of stud.

Without clip spring will push magnet out against face of drum which will cause it to drag.....as it drags lever will move out causing shoes to drag.

I would remove the magnet....reassemble brake drum and get on down the road with just three brakes.
But that is me........

[rvluversnc93]

I would get them looked at they all need to be opened and cleaned. As for the one sticking if you lost the magnet clip I think the spring would push the magnet right off of the swing arm. If its stays on the clip is probably there. I would check the pin where the arm pivots on top for crude or rust causing it to freeze up. I had one do that without being mudded up and it would heat the brakes up on that wheel. To answer the question of how far and how fast I would be afraid to answer. With an inundation of water/sand/mud mixture there could be problems with the brakes working improperly or not at all. I know this may not be what you want to hear but I myself would be scared to death to trust them. They may work fine and may break down on the side of the road.