I searched topics for this but couldn't find exactly what I'm looking for.

Took Thor ('59 1.5 ton) out yesterday and the right rear brake kept locking up....and I mean hard! Put it in reverse and sometimes it would release, and sometimes not. Same with forward gear.

Pulled the drum today, expecting to find a busted spring or something. Nope, nada, nothing visible seems to be the issue. Pried up on the shoes and the springs returned them to correct position. No one to step on the brakes so I could watch, so...

Took it back on the road and screech!!!! Lock up again. What do you think? It's only the RR, all the other brakes seem to be OK. Something restricting the flow of brake fluid back to the MC in that line?

Thanks for you help.

~ Victor
1941 3/4-Ton Pickup (in process). Read about it in the DITY Gallery
1955 Grumman Kurbside "Doughboy" 235/3 on tree w/ OD
1957 3100 - moved on
1959 C4500 Short Bus "Magic Bus" - moved on
1959 G3800 1 Ton Dually "Chief" - moved on
1958 C4400 Viking "Thor" ~ moved on to fellow Bolter