Deep scores may be real minor issue in the overal scheme of things. Deep scores are only a problem if damaging the magnet core and or the wear pattern is not proper. Magnet condition and drum magnet surface must be in harmony. New magnet needs fresh magnet drum surface. Old magnet needs the drum surface to stay the same to match the existing magnet.
Not sure which brand of brake is on your trailer but the Al-Ko Axle manual is at the link below. See page 17 for magnet info. Similar information for Dexter Brakes is available on the Dexter Axle website.
If you have dexter axles and want OEM parts I found eastern marine cheapest on the complete backing plate assembly for $22.49 each wheel and trailer enterprises TrailerEnt.com for the hub/drum assembly with bearings and seal and nut for $59 each wheel and its very easy to do the work. these prices were for 10" drums so if you have 12" it will cost more.
Thanks for all the input. The magnet surface was done. It looks like it was done by grinding. It looks like swirl marks. It was smooth surface. I took them to a local machine shop. At the time I did the job,I had to get the parts locally.I did not have the time to shop. The brakes were in good shape.
The idea of a slight short is interesting. Where can I get more information on this? What should I do to fix this,if it the problem?
Has anyone had experience with "etrailer" for parts?,free shipping on order over $150.00,and prices seem comparable.
I purchased this 5er.used and thought I check the brakes before I used it. The magnets and the contact surfaces were very deeply scored.I thought I would have to buy new drums. Now I may have to.
THANKS,again Brakes are 12x2 6 lugs
* This post was
edited 02/27/12 10:19pm by rvtroubles *