how do you repair lift arm bushings on right side of early 580 ck
A description of the problem and pictures might help get some responses. I have mine apart and they are pretty simple, but, if there is serious wear or fractures, then welding will be required. to bring it back to stock.
What's a lift arm?
I think the OP is referring to the pivot point where the loader frame attached to the tractor and the loader lift frame attach. Damage on the right side isn't uncommon and somewhere in another thread one of the expert old timers explained the relationship to the leveling cylinder, fractures on the loader lift frame below the tilt cylinder mount and damage to the top of the loader frame due to rolling back the bucket to the stop and lifting the loader at the same time. This design problem was fixed in later models loaders after the Model 33 (I think,,,,) If the OP can show us in pictures, and describe what he wants to repair, it would be easier. The exploded parts diagram shows all the pieces involved with that pivot point.