Well I finally finished my trailer brake rebuild,so here are some final comments:
Because my vintage ezloader trailer had a strange grease passage, I did try to dig them clear. Two of the four were open, but the other two have some metal obstruction that wouldn't clear. As best I can make out, there was some sort of valve system on the inner side of the axle, and they have been breaking down for some reason. Anyway, I installed speedy sleeves over the inner profile where the grease was to go out, the idea being to prevent water from getting in and to provide a new stainless surface for my new, double seals to ride on. This all went together, though the speedy sleeves were almost too wide, but not quite.
Then I installed new bearing buddies on the outside after packing the space between the axle to the hub. The new buddies vent off the excess grease outward, so I plan to monitor that and give them a squirt now and then.
I had limited success with the Princess Auto bearing packer, it just did not do a consistent job and I had to finish some of the packing by hand in the end.
The new discs went on ok, but why does Kodiac put the instructions for mounting direction on the plastic bag the calipers slider bolts come in? After reading the paper booklet instructions several times, it was only on a YouTube video I found reference to installing them at nine o'clock on the right side, that is on the rear side of the axle. And then later I found this instruction on the bag as I was installing the calipers.
Bleeding was a bit of a pain, too. I installed a new surge mechanism and ran a new brake line from the front to the back. So with all that air in the line they were reluctant to bleed. I used a hand vacuum, eventually trying each caliper, and only got a few drops of fluid. Finally I discovered that I could use the emergency brake lever as a pump. I had to take the bolts of the lever's cover plate and then remove the metal spring clip that holds the brake lever in the upper, 'on' position. After I got that worked out bleeding became easy: pull the emergency brake lever on the surge, hold, crack & bleed, tighten bleeder and repeat.
In the end the brakes seem to work very well. Oh, and I had to install an electrical feed from my backup lights to the surge mechanism to power the reverse lock-out. I picked up the power from behind the brake light assembly on my Chev truck, ground some paint off in there for a good ground, and it seems fine, backing up works. Thanks for all the help.
Oh, and I got dinged unexpectedly for sales tax bringing the parts in through the Blaine to Victoria shipper, at customs. Parts and materials were about $1200 for the tandem.