Well I freed up this K&B .61 just using gasoline out side. I pulled
the backing plate and let it soak overnight. Then I used some
pliers and broke it loose... once it was loose I spun it with an air
ratchet and soaked it some more. I think the castor keeps the
internals from rusting. Then I blew it out and flooded it with oil...
I'll blow out the excess oil and put t back together... It should be OK.