my 5th wheel has been getting hard to stop lately so I went to adjust them and the adjusters were frozen. Last weekend I opened 2 of them up and freed up the the adjusters. Those things were frozen. While I was in there I noticed that either I have pumped to much grease in there or the seal failed and I had grease on the magnets and a little on one of the shoes. I expect to find some thing similar on the other side. I figure they are 10 years old and I am just going to redo them all.
I have been looking at parts and it appears new shoes are going to cost about $100 for a 4 wheels. But I have also found the whole assemblies for $50 a wheel. Then I found these on Amazon http://www.amazon.com/gp/product/B013779BT8/ref=pd_lpo_sbs_dp_ss_3?pf_rd_p=1944687442&pf_rd_s=lpo-top-stripe-1&pf_rd_t=201&pf_rd_i=B009996ZCU&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=1SS57W1AYNYW62MM39V4. At $160 it seems like a no brainer to me, but the only thing I have ever done to brakes on either of my 2 5th wheels is adjust them. I dont know how to tell if the magnets are wearing out or not. Mine are 10 years old but probably only have 30k on them.
I am curious as to what some of you do for yours when it comes to rebuilding them.