My sp-15 started squealing today; I deduced the noise was coming from either the motor or the ink drum assembly – inspected the motor oil reservoir and topped it up without overfilling. Moved onto the ink drum assembly x 20613 and on removal found the ink drum shaft to be very resistant to rotation. I’ve [...]

I have a badly corroded lock-up bar that I would like to free up. I see numerous good suggestions on how to remove rust, but considering the steel AND aluminum construction of this bar, any suggestions on a type of penetrating oil or rust remover that would work on the movable steel components while not [...]