Spent yesterday and today checking/fixing my trailers brakes. I bought it last year, briefly tested the brakes when purchased and they seemed to work then, but should have physically checked over the system closer, as some of the brakes hadn't been working in awhile. It wasn't an actual problem, as I've got a big truck (Sierra 3500), and while the trailer is big (18' car hauler, 12k lb), I just haul lawn/snow removal equipment with it that weighs maybe 2k lbs altogether.
First side went ok, getting the brakes adjusted and re-greasing the wheel bearings, but the second side, the brakes didn't work anymore because the wiring had broken where it came out from the axle tube (the main harness ran along the first side of the trailer, and they ran wires inside the axle tubes to the other side for the brakes). This problem is not uncommon when they run the wires inside the tubes (the wires also sometimes short out when the insulation wears through from the wires bouncing around inside).
Removed the wires, and bought some paired 12 gauge wire to connect the other side up, tied to the outside of the axle tube.
Also freed up the pivot point for one of the magnet "arms", as it didn't move at all anymore.
Got the second side lubed, adjusted and tested, and reassembled.
I do have to at least get new bearings for the wheels, as even though all the bearings visually looked fine, and the wheels have minimal play, all of the washers by the castle nuts are worn from the bearing rotating and tightening the castle nuts to the end of the spindle threads doesn't result in the bearings being over-tightened. So, they are
-the wrong bearings
-very worn
-installed incorrectly or the hub is worn so the outer races can go in too far.
First side went ok, getting the brakes adjusted and re-greasing the wheel bearings, but the second side, the brakes didn't work anymore because the wiring had broken where it came out from the axle tube (the main harness ran along the first side of the trailer, and they ran wires inside the axle tubes to the other side for the brakes). This problem is not uncommon when they run the wires inside the tubes (the wires also sometimes short out when the insulation wears through from the wires bouncing around inside).
Removed the wires, and bought some paired 12 gauge wire to connect the other side up, tied to the outside of the axle tube.
Also freed up the pivot point for one of the magnet "arms", as it didn't move at all anymore.
Got the second side lubed, adjusted and tested, and reassembled.
I do have to at least get new bearings for the wheels, as even though all the bearings visually looked fine, and the wheels have minimal play, all of the washers by the castle nuts are worn from the bearing rotating and tightening the castle nuts to the end of the spindle threads doesn't result in the bearings being over-tightened. So, they are
-the wrong bearings
-very worn
-installed incorrectly or the hub is worn so the outer races can go in too far.