Repairing a Stiff or Binding Dec Slow Motion Knob
5 replies to this topic
Posted 04 October 2004 - 11:41 AM
Repairing a Stiff or Binding Dec Slow Motion Knob.
Posted 19 June 2007 - 09:21 PM
I dont think this is applicable to the ETX 70. The knob has a 1" plastic thread, instead of the brass one in your photo.
Posted 05 December 2010 - 05:32 PM
My wife's ETX 90RA had a sticky dec knob. Upon taking the arms apart I found that the two knobs were both just screwed on to the ends of the shaft. I just grabbed both knobs and unscrewed them slightly (took alot of force with pliers). They work smoothly now. The AZ knob also was jumpy. I took it apart and saw that one plastic disc rode inside another. All kinds of oil, grease, graphite was tried to no avail. I finally rubber cemented (in case I needed to undo it) 3 tiny slivers of easy gliders onto the bottom disc spaced equally around. It is smooth as silk now.