Quite new to these, was using my 68 CK backhoe in the clay, using the brakes for steering a ton, started having trouble with the left side binding after it sat a while, did some research and learned to check the brakes. Tore it apart and found one of the band linings had come off. Got new ones, cleaned everything with brake cleaner and put it all back together, seemed good for a minute, then started working it and found if I tried to use the left brake it would immediately lock the wheel and if under pressure won't let go without going opposite direction. quite sure it is a brake problem bc if i don't use the left brake it never has any problems. Everything seemed in fine condition, thinking possibly either put the drum on backwards (put the splined unit against the tractor) / springs worn out or assembled incorrectly (band springs seemed a little loose, do the ends of the springs go in the holes or the slots on the bands... i put them in the slots). Any help would be much appreciated.