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Cave DEC clutch question.

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8 replies to this topic

#1 2manyscopes

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Posted 30 April 2007 - 12:28 AM

On some Astrola mounts, mainly those supplied with 10" Newts, there is a
thick aluminum ring that slips over one end of the DEC axis housing. Usually
they are located just below the tube cradle but I have seen them on the
counterweight end of the housing. Inside the ring, there is a thin brass
ring. Four set screws go through the thick ring to press against the brass
ring which in turn presses against the DEC housing providing clutch
friction.

My question is, should grease be applied between the brass ring and the DEC
housing. When I took this apart it was relatively dry but the area was very
dirty and black. I know that the RA clutch is also brass/aluminum and is
supposed to be dry. Anyone out there know if Cave greased this area or not?
Thanks,
Bill

#2 clintwhitman

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Posted 30 April 2007 - 01:00 AM

That is a great question Bill the caves I took apart to clean both looked dry. Also it didnt make sence to be to grease it. I used my 10" for a time dry and have taken it apart and it seems to be doing fine so I left it dry and figured I would check it now and then. I have a friend Ron Pastory He has a bunch of caves I will ask him. If you get any info let me know. Clint

#3 Bonco

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Posted 30 April 2007 - 03:21 PM

If my memory serves me I'm pretty sure mine was dry.
Bonco

#4 Rcade

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Posted 30 April 2007 - 07:38 PM

Mine is dry and works great. I have replaced the springs with heavier duty springs. It seems that if I had greased it a lot more pressure would be needed to keep the clutch from slipping.

#5 2manyscopes

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Posted 30 April 2007 - 07:54 PM

Mine is dry and works great. I have replaced the springs with heavier duty springs.


Thanks for the reply. I think you may be talking about the RA clutch as it has three springs. The DEC clutch I'm talking about (there may have been more than one style) has no springs. You are correct, the RA clutch should be dry.
Bill

#6 2manyscopes

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Posted 30 April 2007 - 08:00 PM

Clint & Bonco,
Thanks for the input. I assumed that it should be dry but just thought I'd double check. Once assembled with the scope on top the DEC clutch is over 7' off the ground and somewhat of a pain to work on. I always thought the DEC clutch was a little too free on this mount anyway so I'll leave it dry.
Thanks,
Bill

#7 Bonco

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Posted 01 May 2007 - 05:37 PM

Bill, Let us know how it works out or if you learn anything different.
Bonco

#8 clintwhitman

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Posted 01 May 2007 - 06:57 PM

I posted on the group to, I asked Ron Pastory he has like 20 caves he is the real cave man! DRY was the word from him to...

#9 Rcade

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Posted 01 May 2007 - 08:13 PM

I think you may be talking about the RA clutch as it has three springs.



Yes, sorry Bill I did not read your post close enough or maybe my head was just in the clouds. :o


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