I just did the trailer brakes on my 2001 shorelander trailer. I thought I would pass along a little info I learned about them.
They were 4 wheel disk surge brakes . When they are right you can slide the trailer tires in A panic stop.
The new rotors came painted . First thing I did was spray brake cleaner on them, didnt work, Then tried to wirebrush the paint off. You DO NOT take the paint off the rotors
you leave it on. Something new to me.
Next time I do them I would probably drop the axles and do the brakes out from under the trailer .The cap bolts that hold the caliper are tight to the axle you need a allen wrench to get them out. It would be a lot easier with the U bolts out of the way.
Got my parts at local NAPA store. Had to order them in.
4 new seals ,4 bearing sets. 4 rotors , 2 calipers , 4 sets of shoes, tube of marine grease about $450 bucks.
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There are several ways to bleed the brakes on the internet I went old school,Two people, pry on tongue with 2x4 hold, open bleeder,repeat till air stops comming out.
Takes a day start to finish with regular hand tools....