I am refurbishing a SP-15, which had been sitting in parts in a basement for 20 years (and when I say parts, I mean that the bed was removed from the legs). I am having troubling loosing up a few parts. None of these parts have much apparent rust… they are just not moving.
Problem 1: The grippers will not move from the gripper bar. I have removed all the knobs, rings and spring. The bar with grippers has been soaking first in mineral spirits and then in Evapo-rust over the last three days. I have also tried liquid wrench. I have tried lightly tapping the bottom of the grippers with a rubber mallet. Any suggestions?
Problem 2: All the bearings, except one, are frozen. I have tried similar soaking procedures with these, and after 3 days they are bubbling when immersed in Evapo-rust, but are still not moving. A car mechanic suggesting I try boiling them… any other suggestions?
Thank you for any advice,