In Reply to: Rusty Grader Blade posted by Onerook on May 14, 2016 at 14:13:18:
Persistence by you will eventually free up the rusted pivot tube. However do not add a zerk fitting and grease the pivot tube. Much like the front axle pivot pin, grease will retain any dirt and speed up the rusting. Make sure there is plenty of clearance between the inner and outer pivot tubes.
My 2 cents of thought.