Have an old Yale L83C-040-SAT-71, LP, Automatic.

Months ago I replaced everything brake related at the drive wheels, including new springs, parking brake cables, rebuild the wheel cylinders. Reason for the work was parking brake cables frozen, springs broke, cylinders leaking.

Everything went smoothly and I've used the truck a few times since then.

I went to use it the other day and the left side is locked up. The right side drive wheel did burnouts in either direction. I was able to get it to move when jacked up. I took it apart. Everything looked fine, but I loosened the adjusting screw on the brakes if maybe they were too tight. Note - I was able to get the drum off with minimal wiggling indicating the brakes were not adjusted too tightly.

I put it all together and was able to move backwards about a foot, frontwards about 2 feet, and then it locked up again.

I just jacked it off the floor on the left side and with a breaker bar was able to spin the wheel both ways, but it was locked up at first. Let it down, went a bit forward, then locked up again.
To do this job, the cover over the bearing also holds the axle shaft, so have to pull it out to take off just the wheel or the wheel and the brake drum.

Any ideas of what is going on?

EDIT - took it all apart again. Pic of brakes attached. I pulled the bearings. They seem fine for being 50+ years old. I ordered new ones anyway.
Does somebody here have a service manual for a similar truck? I put the brakes back together the same way they came off months ago.

The only two things that could lock it up with the axle pulled is the brakes or the bearings.
Can somebody post the factory procedure for setting bearing preload?
I simply tightened the bearing nut until I felt some resistance, then backed it off a little, maybe about 1/16-1/8 turn, until the locking device was lined.

Again, Thanks

Thank You