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Repairing a Stiff or Binding Dec Slow Motion Knob

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8 replies to this topic

#1 StarWars

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Posted 04 October 2004 - 11:41 AM



Repairing a Stiff or Binding Dec Slow Motion Knob.

http://home.att.net/...ssin/etxdec.htm

#2 mattyfatz

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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.

#3 WhiteLight

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Posted 16 October 2008 - 06:45 AM

I have a siff/ Binding RA knob. Any ideas? It doesn't twist smoothly, but sticks, making panning quite jumpy.

Edit: Ah. Same guy has a page for this problem as well: Link:

#4 dengwer

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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.

David

#5 Westseen

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Posted 03 November 2013 - 09:08 PM

This Link is dead?

#6 cnlson

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Posted 16 August 2015 - 03:40 PM

This Link is dead?

http://www.schlatter...etx90decknb.htm

http://www.weasner.c...htips/etxtu.htm



#7 JW49656

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Posted 14 August 2019 - 05:50 PM

I have been unable to get the DEC KNOB to come lose on a 8” lx 200 Meade. Any ideas on what to do?



#8 JW49656

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Posted 14 August 2019 - 05:58 PM

I forgot to say it has set up a couple of years. That is what was told. I just bought it it looks new. It was stored upstairs in a very nice home. The owner said the only reason for selling it was cause he hadn’t used it in two years. Hope that is not a bad thing.



#9 JW49656

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Posted 15 August 2019 - 04:00 PM

I was able to get it lose by using a flat bottom punch on the ribs of the knob . I tapped it very lightly with a small brass hammer. It came lose on the third tap. Hope this helps everyone who has this problem . Everyone have great viewing .  JW




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